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How to Choose Hidden Rivet Fasteners for Solar Mount?

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How to choose hidden rivet fasteners for solar mount?

By reading this blog, you will get to know about the applications, considerations and verification methods of rivet fastener for solar mount. Let’s explore it together!

what are Hidden Rivet Fasteners？

Types of Lockbolt Rivets

Hidden rivet fasteners are a type of rivet construction that does not expose the mandrel, does not protrude the rivet head, and does not affect the appearance or function of the rivet after installation. These rivets are designed for aesthetically pleasing structures, burglary and tamper resistant applications, or where sealing is required. Its core features include: closed structure, flat head or inline design, and no sharp protrusions after installation. They retain the high strength and permanent locking characteristics of riveted joints.

Why is it critical in Solar Mounting?

The role of hidden rivets is especially critical in Solar Mounting Systems. It is mainly reflected in the following aspects:

1. Aesthetic requirements
Solar Mounting Systems are increasingly used in residential roofs, BIPV building facades, metal roofs and other scenarios. These applications require that external connections are not exposed and do not affect the visual unity of the structure. hidden rivets have a clean appearance after installation and no mandrel protrusions at riveted joints. Hidden rivets have a clean appearance after installation, and are therefore ideal for use in visible areas such as the front of the rail and the surface of the edge press.

2. Anti-theft and anti-tampering
In open roof or ground power plants, exposed rivet mandrels are often used to illegally dismantle components or accessories. Concealed rivets significantly improve the anti-theft factor because the broken core is not exposed and the connection is irreversible. Therefore, they are widely used in inverter shells, cable covers and other parts.

3. Waterproof sealing
Many solar racking components (such as electrical covers, racking bases, junction box support plates) need to be kept sealed and waterproof at the riveting points. While ordinary open end rivets form a water ingress channel when the mandrel breaks, closed end Hidden rivets ensure that the entire connection structure is impervious to seepage, rust and condensation.

4. Safety and construction consistency
Hidden rivets have no exposed metal edges, avoiding scratches to operators or cable lines during construction or maintenance. In addition, the hidden rivets mostly use mechanical locking core or fixed-point broken core structure, installation quality can be seen, high reliability, suitable for automated or semi-automated assembly process.

Why is it critical in Solar Mounting

Typical Applications for Blind Rivets in Solar Mount Systems

Blind rivets are riveted fasteners that can be installed from one side. Therefore, they are very suitable for connection scenarios where the backside of the structure is not accessible or the assembly space is limited. At Solar Mounting Systems, blind rivets are used in a variety of critical applications due to their high efficiency, ease of installation, and structural reliability. Blind rivets play an irreplaceable role in industrial grade module installation, power plant construction and distributed roofing projects.

1. Racking rail and roof connection base fixing

When installing solar racking on metal roofs, color steel tiles or concrete bases, the base of the rails usually needs to form a stable, shear-resistant, long-term corrosion-resistant fixed connection with the roof. Since the back of the roof panel is not accessible, blind rivets are ideal.

  • Recommended types: Monobolt, Hemlok (structural blind rivets)
  • Characteristics: high tensile shear resistance, lock core anti-loosening after installation, anti-vibration performance, alternative to the traditional combination of nuts and washers connection

2. Concealed connection of component side/center blocks to guide rails

In systems where aesthetics or simplicity of installation are important, the component side or center blocks can be attached to the rail from the inside using blind rivets. This allows for concealed locking and eliminates the need for exposed external bolts.

  • Recommended Type: Flush-head Closed-End Blind Rivets
  • Characteristics: Flush-head is not exposed after installation, no cuts, no water accumulation, especially suitable for residential roofs and visible area installation projects.

3. Quick assembly of accessories such as cable trays, raceways, shrouds, etc.

Solar Mount projects often require a large number of auxiliary accessories. Such as cable trays, cable guide brackets, guards, electrical boxes and so on. These components are large in volume, frequent in operation, and require moderate accuracy, making them suitable for quick positioning and fixing with blind rivets.

  • Recommended type: Open-End or Multi-Grip Blind Rivets
  • Characteristics: large holding range, high fault tolerance, adaptable to different plate thickness and hole diameter deviation, fast installation, greatly enhance the efficiency of on-site construction.
How to Choose Hidden Rivet Fasteners for Solar Mount

4. BIPV Roof Structure Module Attachment (Invisible Back Assembly)

In building-integrated photovoltaic (BIPV) projects, solar modules are integrated directly onto metal tiles or curtain wall panels. The riveted areas are mostly thin, non-metallic, closed structures. Screws or double-sided operating tools cannot be used in these areas.

  • Recommended type: Bulb Tite Blind Rivets
  • Characteristics: Tri-fold structure distributes the expansion force, preventing the thin plate from tearing and warping of the surface layer, suitable for aluminum alloy, composite materials and other lightweight structures to be connected.

five core factors to consider when choosing the rivet fasteners for solar mounting

Selecting the right rivet fasteners for Solar Mounting is a critical part of ensuring the structural stability, corrosion resistance, construction efficiency and service life of the entire system. The following are the five core selection factors that must be considered, each of which has a direct impact on the quality of the connection and the operational reliability of the system:

DimensionKey ConsiderationsDesired Outcome
Structural TypeIs it a primary or auxiliary connection? Single or blind-side access?Choose structural, blind, or quick-install rivets appropriately
Material CompatibilityIs the rivet metal compatible with the substrates?Avoid galvanic corrosion, match thermal expansion
Corrosion ResistanceSalt spray rating? Need sealed design?Ensure long-term rust resistance and watertight sealing
Installation CompatibilityAre tools compatible? Is on-site installation feasible?Maintain efficiency and consistency in field installation
Service Life & StandardsDoes it meet 25-year PV system lifecycle? Is it certified?Select products with validated test data and compliance certifications

Core Factor 1: The type of structure of the connection part

There are also differences in the way different parts of the connection are loaded. The choice of rivet structure is also different:

  • The main load-bearing connections (such as rails and roof, bracket column): the need to use high-strength structural rivets (such as Monobolt, Lockbolt), to ensure that the tensile and shear does not loosen.
  • Non-load-bearing auxiliary connections (such as cable covers, wiring brackets): can use a wide range of grip, easy to install Multi-Grip or Bulb-Tite rivets.
  • Hidden installations or areas where appearance is critical: Flush-head or closed-end rivets are recommended to avoid exposed mandrels.

📌 Suggested Judgment Criteria: Is the location subject to long-term wind loads? Can it be operated from both sides? Is it a visible area?

Core Factor 2: Material Compatibility and Electrochemical Matching

Rivet material must match the connection material to avoid galvanic corrosion:

  • Aluminum alloy structure (such as frame/rail): It is recommended to match aluminum body + stainless steel core rivets to ensure the consistency of thermal expansion and corrosion resistance.
  • Galvanized steel, color steel tiles, steel beam structure: It is recommended to use galvanized steel rivets or Dacromet treatment to prevent corrosion reaction between aluminum – iron.
  • Composite panels, BIPV substrate: It is recommended to use three-flap or soft expansion structure with low expansion pressure to avoid interlayer rupture.

📌 Pit Avoidancer: Carbon steel exposed rivets are strictly prohibited for aluminum profile connections, especially in wet or coastal projects.

Typical Applications for Blind Rivets in Solar Mount Systems

Core Factor 3: Corrosion Resistance

Solar Mount systems are exposed to harsh outdoor environments throughout the year and rivets need to have excellent weathering properties:

  • It is recommended to select products that have passed ≥240 hours of neutral salt spray testing.
  • Available finishes include: anodized, Dacromet, zinc plating + closed passivation, etc.
  • Enclosed structure effectively prevents rainwater, sand and dust from entering the connection core, prolonging its life.

📌 High-risk environments: seashores, acid rain areas, high concentration of industrial emissions recommend the use of stainless steel or specially coated rivets

Core Factor 4: Mounting methods and tool compatibility

Solar Mount projects are often high-altitude, high-volume jobs where installation efficiency is critical:

  • Is it a blind hole structure? → Blind Rivets should be used.
  • Does it support quick on-site installation? → Blind Rivets with a clear, visually identifiable broken core are recommended.
  • Is it compatible with existing tools? → Rivet size (core diameter/stroke) should be compatible with commonly used rivet guns/pneumatic guns.
five core factors to consider when choosing the rivet fasteners for solar mounting

Core Factor 5: Life expectancy and structural certification standards

Rivet connections must maintain the same life expectancy (20-30 years) as the PV system body and meet relevant certification standards:

  • Mechanical properties should meet the requirements of ISO 14589 / DIN 7337 / ASTM F1470 standards.
  • Shear force, tensile force test report and material composition certificate should be provided by the factory.
  • High-end items should be certified by third-party testing organizations (e.g. SGS, TÜV).
  • Environmental compliance: RoHS / REACH compliant, especially for export projects.

Performance requirements and validation methods for rivet fasteners in solar mounts

In solar racking systems, rivet fasteners must have high strength, corrosion resistance, reliable locking and good mounting consistency. Only with these characteristics can they be adapted to the harsh environment of long-term outdoor operation. Key performance requirements include:

  • Tensile / shear strength: withstand wind loads and structural stresses, structural rivets need to be ≥4.5-6.0kN;
  • Anti-corrosion ability: through the ≥ 240 hours salt spray test, it is recommended to use stainless steel or Dacromet treated products;
  • Lock core security: the mandrel should be locked and not exposed after riveting to prevent loosening or water ingress;
  • Installation reliability: support for single-sided installation, mandrel breakage needs to be clearly prompted to ensure construction consistency;
  • Fatigue and environmental testing: Long-term stability is verified through thermal cycling, moisture and heat, and vibration testing.

These properties are the basis for ensuring that Solar Mount rivets achieve a 25-year design life on your project.

Performance requirements and validation methods for rivet fasteners in solar mounts

Why Choose Rivmate Solar Mount Rivets?

As a key connecting element in a solar mounting system, choosing the right rivets is critical to the structural stability, corrosion resistance and long-term operational safety of a project.Rivmate specializes in photovoltaic fastening technology. Rivmate specializes in PV fastening technology and offers a wide range of riveting solutions for Solar Mounts, including structural, closed and triple-flap types. And our solar mount rivets are ISO and salt spray certified to meet global PV engineering standards.

Whether you are a mount manufacturer, module manufacturer or EPC engineer, Rivmate can provide you with samples, drawings, selection support and efficient delivery. Contact us for a rivet recommendation for your project or meet us at the next fastener show.

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How to Choose Rivet Fasteners for Solar Roof?

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How to choose rivet fasteners for solar roof?

If you are looking for reliable solar roof rivets solutions for your solar roof project, then this guide will be of great help to you.

This blog introduces you to the common applications of rivet fastener for solar roof as, core factors for choosing rivets and types of solar roof rivets.

Why the selection of solar roof rivets is crucial？

In the Solar Roof system, rivets are not only a kind of fasteners, but also a key link to ensure the long-term stable connection between modules, brackets and roof, wind and corrosion resistance, anti-seepage and anti-loosening. Its performance directly affects the safety, service life and maintenance cost of the system.

Solar roofs are exposed to multiple environmental pressures such as high temperatures, strong winds, rain, snow, UV rays and moisture for a long time. If the rivets are not properly selected (such as material mismatch, insufficient strength, lack of sealing performance), it is easy to cause frame riveting, bracket loosening, water vapor intrusion, corrosion and perforation and other problems. Even in serious cases, it may lead to component falling, roof leakage, and even cause property and personal safety hazards.

Why the selection of solar roof rivets is crucial？

Therefore, choosing the right rivet fasteners for solar roof is not only a matter of mechanical connection, but also a comprehensive decision on the structural safety, corrosion reliability and installation efficiency of PV system.

As a professional rivet manufacturer, Rivmate suggests customers to select the rivet fasteners systematically according to the roof structure, installation parts, environmental grade, material combination and other factors to avoid the risk of “replacing engineered parts with universal parts”. In this article, we will start from the actual application to help you accurately match the position and function of each rivet.

Common locations for rivets in solar roofs

In Solar Roof systems, rivets are widely used in a variety of connection locations between modules, racking and roofing structures. Rivets are used for fastening, windproofing, waterproofing and structural reinforcement. Below are the most common rivet locations in Solar Roof and their function description:

Common locations for rivets in solar roofs

1. Attachment of the module frame to the center block/edge block

  • Use: Used to secure solar modules to the racking rails, especially when the aluminum bezel is pre-assembled with accessories.
  • Explanation: Usually the connection is aluminum alloy profile, the selection of low expansion, corrosion-resistant blind rivets (such as Tri-Fold Rivets or Closed-End type Rivets) can effectively prevent the edge frame from pulling apart, corrosion and loosening.

2. Fixing point of bracket rail and roof structure interface

  • Use: To connect the bottom of the bracket with metal tiles, purlins or roof steel beams to resist wind pressure and vibration.
  • Description: This part requires high load bearing capacity, structural rivets (such as Monobolt, Lockbolt) should be used. With high tensile and shear strength, anti-loosening design, to ensure the system is safe and solid.

3. Installation location of cable trays, shrouds and junction box accessories

  • Purpose: Installation of cable channel covers, electrical interface protection shields or alignment brackets to ensure that wiring is organized and protected.
  • Description: Recommended to use multi-grip blind rivets (Multi-Grip) or bulb type rivets (Bulb-Tite) to adapt to a wide range of board thicknesses, distribute stress, and prevent deformation or loosening of the cover.

4. Flashing, sealing interface structure

  • Use: Aluminum or plastic plates are often set up as sealing layer between the solar racking system and the roof to guide drainage and prevent leakage.
  • Description: Such parts should use closed type blind rivets (Closed-End), with good waterproofing to prevent mandrel residue or water vapor backflow.

5. Attachment points in BIPV roof photovoltaic (PV) shingle systems

  • Use: In building-integrated photovoltaic (e.g., metal tile power generation systems), rivets are used to fix the photovoltaic modules directly to the metal roofing substrate.
  • Description: Triple-flap or low expansion structure rivets should be used, suitable for light and thin profiles, to prevent damage to the roof coating or insulation structure.
Application AreaFunction of the RivetRecommended Rivet Type
Module frame + clamp connectionAnti-crack, anti-loosening, corrosion-resistantTri-Fold / Closed-End Rivets
Mounting rail to rooftopHigh shear & tensile strength, wind resistanceMonobolt / Lockbolt
Cable tray / junction box mountsFast installation, stress dispersionMulti-Grip / Bulb-Tite Rivets
Waterproof layer & sealing zonesWatertight seal, prevents stem falloutClosed-End Rivets
BIPV solar roof integrationLightweight fastening, avoids roof damageTri-Fold / Soft-Grip Rivets

Core factors to consider in solar roof rivet selection

There are many factors to consider when choosing the right one for your solar roof system. Rivets not only affect how securely the modules are mounted, but also directly determine the safety, corrosion resistance, waterproofing and maintenance costs of the entire system during long-term outdoor operation. Below are 4 core factors that must be considered when selecting rivets for Solar Roof:

  1. Types of connecting materials and matching relationship
  2. Roof environment and climatic conditions
  3. Waterproof sealing and risk of rainwater backup
  4. Structural strength and wind vibration resistance
Core factors to consider in solar roof rivet selection

Types of connecting materials and matching relationship

Importance: Galvanic corrosion is easily formed between different metal materials if their electrochemical properties are not compatible. This can cause corrosion failure of aluminum frames, galvanized steel brackets or roofing structures.

  • Aluminum frame recommended with: aluminum rivets or stainless steel core aluminum body rivets
  • Galvanized steel brackets: galvanized steel or Dacromet treated rivets are recommended.
  • If rivets span two different metals, insulating shims or anti-corrosion layers should be added.

✅ Pit Avoidance Tip: Avoid using carbon steel exposed rivets for fixing aluminum alloy parts, especially in humid or coastal areas.

Roof environment and climatic conditions

Important: Roofing is a complex environment with year-round exposure to wind, rain, sunlight, temperature differences, dust and corrosive gases, rivets must be weather resistant over the long term.

  • Coastal or high humidity areas: Stainless steel or Dacromet coated rivets are preferred, meeting ≥240 hours of salt spray testing.
  • High-temperature and sunny areas: thermal stability of the rivet mandrel and tensile strength degradation should be a concern.
  • Windy areas (e.g. high altitude or open roofs): use structural high-strength rivets to improve shear tensile strength.

✅ Technical advice: Choose certified products with actual environmental test data (e.g. salt spray, thermal cycling).

Waterproof sealing and risk of rainwater backup

Important: Rivets in the Solar Roof used in the sealing layer, water guides, or around the perimeter of the control box can lead to water leakage or corrosion spreading if the seal fails.

Rivmate Waterproof Bulb Tite Rivets
  • For blind holes or sealed joints, use Closed-End Rivets.
  • Rubber gaskets or one-piece waterproof cap rivets are recommended for critical locations.
  • Check for flush or exposed cores after installation.

✅ Risk Warning: The use of common open end rivets to fix the lower closure plate can create a rainwater channel in case of rain and cause electrical or structural accidents.

Structural strength and wind vibration resistance

Importance: The wind loads on the roof are complex and the rivets must withstand the effects of tension, shear and frequent thermal expansion and contraction.

  • Primary structural connections: structural blind rivets (Monobolt, Hemlok) or Lockbolt with ≥5kN shear strength are recommended.
  • Component block connections or mounting aids: Tri-Fold, Multi-Grip types with controlled grip can be used.
  • Dynamic systems (e.g. tracker systems): reliable, fatigue-resistant cylinders and long-term loosening-resistant construction are preferred.

✅ Design suggestions: Different connection parts should distinguish between “load-bearing connection” and “positioning connection”, and reasonably select the type and size of rivets.

Rivet types for different solar roof structures

Aluminum Edge Frame and Clamp Area Connection Location (Module Frame + Clamp Area)

In roof module installation, the aluminum side frame is fixed to the bracket rail by means of a center or side press. This is a light load connection, the material is thin walled aluminum alloy, if the expansion force is too strong it may cause the frame to tear.

  • Recommended Rivet Type: Tri-Fold Blind Rivet or Closed-End Rivet
  • Advantage Description: Tri-fold structure can disperse the clamping force, suitable for flexible materials; closed design to prevent the mandrel from falling off and enhance corrosion resistance, suitable for long-life component structure needs.
Rivet types for different solar roof structures

Roof Deck or Steel Purlins

This type of connection carries the main wind load, snow load and structural vibration of the roof, and is the typical “structural riveting point” in a solar roof system.

  • Recommended Rivet Type: Monobolt Structural Rivet or Lockbolt
  • Advantage Description: High shear strength and tensile strength, locking core mechanically locked without loosening. Therefore, it is very suitable for structural joints such as color steel tiles, galvanized beams, thick steel brackets and other structural joints. And it can be used as a permanent connection after installation to enhance the overall wind resistance level of the system.

Installation points for accessories such as cable supports, cable bridges and shelter covers

Most of these areas are used for wiring assistance, visual screening or electrical protection, and are “non-structural quick connects”. However, they are numerous and widely distributed and require high construction efficiency.

  • Recommended Rivet Type: Multi-Grip or Bulb-Tite Rivet
  • Advantage Description: Multi-grip structure can be adapted to different thicknesses of the installation, reducing inventory complexity. These rivets have a gentle expansion structure and uniform force distribution. It can avoid forming indentation or slipping on aluminum plate or plastic cover.

Sealed structural points such as flashing, drainage channels, and ventilation hoods

These areas are directly related to waterproofing. The bottom of the module, the lower part of the bezel or the vent area need to be protected from rainwater back-up and electrical moisture.

  • Recommended Rivet Type: Sealed Blind Rivets
  • Advantage Description: Closed end structure effectively prevents water vapor from penetrating the riveted joints, and the mandrel locking design avoids leakage due to a loose mandrel, improving the overall IP rating. Stable and reliable performance in humid and high-frequency condensing environment.

BIPV Roof (Metal Tile PV System) Structural Connection Points

In building-integrated photovoltaic systems, the modules are integrated directly into metal tiles or roof panels. Usually composite panels, coated steel sheets or lightweight aluminum substrates. Therefore the structure is lightweight, thin and sensitive to joining pressures.

  • Recommended Rivet Type: Tri-Fold or Soft-Grip (low expansion) rivets
  • Advantageous Description: The three-flap expansion design avoids pressure penetration or cracking, especially for aluminum panels between 0.7-1.5mm, color steel tiles, etc., to ensure a safe installation process, a solid connection without injuring the panels, and compatibility with the requirements of the building’s appearance.
Application ScenarioRecommended Rivet TypeMaterial SuggestionFunctional Description
Aluminum frame connection (module clamps)Tri-Fold / Closed-End RivetsAluminum body + SS stemDistributes stress, prevents cracking, corrosion-resistant
Steel sheet or galvanized roof purlinsMonobolt / Lockbolt Structural RivetsGalvanized / StainlessHigh shear/tensile strength, vibration-resistant
Cable trays & accessory bracketsMulti-Grip / Bulb-Tite RivetsAluminum / StainlessFits varied thicknesses, fast install, prevents distortion
Waterproof covers / lower sealing panelsSealed Blind RivetsAluminum / StainlessPrevents stem fallout, improves waterproofing, anti-rust
BIPV solar-integrated metal roofingTri-Fold / Soft-Grip RivetsAluminum / Zinc-platedLow expansion force, protects thin panels from cracking

Solar Roof rivets are carefully matched to the structural stress level, installation location, material properties and sealing requirements.

Rivmate offers a wide range of roof rivets in a variety of sizes and configurations to meet the needs of projects ranging from conventional distributed roofing projects to high standard BIPV projects. If you provide us with a specific roof plan or project type, we can recommend the best match and provide samples for testing. Would you like me to continue organizing my recommendations? We’re happy to

Custom Rivet Fasteners for Solar Roof from Rivmate

In the solar roof system, the rivet is small, but it plays a significant role. It not only bears the core connecting task between the module, stent and roof, but also directly affects the system’s structural stability, anticorrosion life, waterproof security and later maintenance costs. Improper selection may bring serious problems such as corrosion perforation, loose connection, rainwater leakage, etc., which brings high cost to the project.

Rivmate: Specialized Solar Roof Rivet Solution Provider

As a rivet brand specializing in photovoltaic fasteners, Rivmate is committed to providing highly reliable and efficient specialized rivet products and selection services for solar rooftop projects. We provide the following support:

  • A full range of Solar Roof rivet models: covering closed, structural, three-flap, multi-grip and other structures, suitable for aluminum frames, color steel roofing, BIPV systems and other connection environments.
  • Various anti-corrosion grades are available: aluminum alloy, stainless steel, Dacromet and other materials have passed ISO 9227 salt spray test.
  • Support sample sending + drawing docking: according to the customer’s structural drawings to provide one-on-one selection and 3D model file support
  • Recommended riveting tools: Improve construction consistency and quality control efficiency.

Welcome to offline communication: communicate with Rivmate face to face about your project needs!
Rivmate participates annually in fastener exhibitions around the world. We will be showcasing our latest generation of solar rivets and project examples. At the show you can:

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How to Choose Rivet Fasteners for Solar Cover?

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This blog will focus on solar cover material matching, corrosion resistance, structural stress adaptability, installation process and avoidance of common misconceptions. Systematically analyze how to choose the ideal rivet solution for your Solar Cover.

Why Choosing the Right Rivet is Crucial for Solar Cover？

Rivet connections in solar panel (module + holder) systems

In solar energy system, Solar Cover refers to the metal or composite protective shell installed at key locations such as modules, electrical boxes, rail brackets, tracker systems, etc. Its main function is to protect electrical components from dust and moisture intrusion, enhance structural stability, and improve the overall safety and durability of the system. Its main purpose is to shield electrical components, prevent dust and moisture intrusion, enhance structural stability, and improve overall system safety and durability. These Covers may be made of aluminum, stainless steel, plastic, or fiberglass panels with thin thicknesses and high structural dependence on connectors.

In solar covers, rivets serve three key roles as a permanent fastening solution:

  • Sealing: Closed rivets prevent rainwater and salt spray from penetrating the interior of electrical compartments or control boxes;
  • Protection: structural rivets provide tensile and shear strength to cover panels, preventing them from coming loose during wind loads or vibration;
  • Assembly efficiency: single-sided mounting facilitates quick on-site construction and reduces the need for thread maintenance.

Therefore, choosing the right rivets (structural form, material, corrosion protection grade) is crucial to the stability of the Solar Cover’s performance, system life and post maintenance.

What are the common types of rivet fasteners used in solar cover?

Closed-End Blind Rivets for solar cover

  • Features: Tail end closure, mandrel locking without falling off, effectively preventing water vapor from entering or debris from falling.
  • Applicable scenes: inverter shell, electrical box cover, tracker control compartment and other parts that need to be sealed and protected.
  • Advantages: structural sealing, anti-arbor falling off, better anti-corrosion performance.
  • Material: Aluminum + Stainless Steel Core / Galvanized Steel Body
What is a Closed End Rivet?

Tri-Fold Blind Rivets for solar cover

What are tri fold rivets
  • Characteristics: Rivet body tail part of the three-flap unfolding, forming a large area “anchor claw” locking force, suitable for connecting thin plates or brittle materials.
  • Applicable scenarios: aluminum cover, composite panels or glass-based cover panels, especially suitable for BIPV systems.
  • Advantages: low point pressure, stress distribution, protection of surfaces against tearing.
  • Material recommendation: aluminum body + stainless steel core

Multi Grip Blind Rivets for Solar Cover

  • Characteristics: Adaptable to a wide range of board thicknesses, with a strong and soft backside expansion area like a light bulb.
  • Applicable scenarios: rapid assembly of different thickness covers, such as metal roof covers, cable bridge attachments, etc.
  • Advantages: Adaptable assembly tolerances, reduced number of SKUs in stock, stable mounting.
  • Material recommendation: aluminum / galvanized steel / stainless steel
Multi Grip Blind Rivets Manufacturer

Structural Rivets / Monobolts

What is a Monobolt Rivet
  • Characteristics: High shear and tensile strength, often used as an alternative to bolted connections, not removable after installation.
  • Applicable scenarios: shield structures with high loads, in vibration or high wind areas (e.g. Tracker’s housing).
  • Advantages: Anti-loosening, anti-theft, anti-disassembly, high stability.
  • Material recommendation: galvanized steel / stainless steel (with special tools)
Rivet TypeWaterproofStrength LevelMaterial CompatibilityTypical Applications
Open-End Blind Rivet✘MediumMetal / Plastic MixedCable covers, non-structural panels
Closed-End Blind Rivet✔MediumAluminum, Stainless SteelElectrical enclosures, control boxes
Tri-Fold Blind RivetModerateMediumThin aluminum, compositesGlass-based or lightweight cover panels
Bulb-Tite / Multi-Grip RivetModerateMedium-HighVersatile for all materialsVariable-thickness cover fastening
Structural Rivet / Lockbolt✔HighSteel structuresTracker covers, high-wind load sections

5 Core factors to consider when choosing rivet fasteners for solar cover

When selecting the right rivet fastener for Solar Cover, it is important to consider key factors such as material construction, environment and installation process. The following are the five core selection considerations that directly affect the reliability, protection and service life of the riveted joint.

Factor I. Solar Cover Material Type

Why does the type of material of the solar cover matter? Different solar cover materials (e.g., aluminum, stainless steel, plastic, or composite) are sensitive to rivet expansion forces, clamping forces, and stress distribution.

  • Aluminum or thin metal panels: Low expansion force, distributed stress type rivets such as Tri-Fold or Bulb-Tite are recommended to prevent cracking of the panel.
  • Plastic or fiberglass panels: Light tensile force, closed cell type rivets should be used to prevent the mandrel from penetrating or falling inside the equipment.
  • Composite or honeycomb panel construction: large spread rivets are required to reduce unit pressure and ensure that the structure does not peel.
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Factor II. Working environment (corrosion and weathering resistance)

Why is solar cover so important to be put in the second point to explain? Solar Cover is mostly exposed to the outdoors, facing multiple corrosive environments such as sun and rain, salt spray, sand, acid rain, etc. Therefore, if you choose the wrong material, it is very easy to rust and corrosion failure.

  • High humidity or coastal areas: must use stainless steel or Dacromet-treated rivets, through ≥ 240 hours of salt spray test.
  • Strong UV/high-temperature areas: avoid the use of lightweight materials that are prone to fatigue and aging, and pay attention to the thermal stability of the rivet mandrel.
  • BIPV façade or building integrated systems: consider exterior color matching, waterproof rating and environmental certifications (e.g. RoHS/REACH).

Factor Ⅲ: Connection location and installation accessibility

In practice, Solar Covers are often enclosed or space-constrained structures. Therefore, when installing solar cover, part of the position can only work on one side, bolts or washers are not available.

  • Blind hole structure (can not be operated from the back): Blind Rivets should be used (Blind Rivets) structure, such as closed type or three-flap type.
  • Narrow space installation: It is recommended to use low head type, small flange, short core blind rivets to avoid interference with other parts.
  • Do not allow loose maintenance: choose non-removable structure rivets to enhance structural safety and anti-theft and anti-loosening ability.
How to Choose Rivet Fasteners for Solar Cover

Factor IV. Load Strength and Vibration Durability

Solar Cover is used in outdoor environments, so it is inevitably subjected to wind pressure, transportation vibration, or equipment thermal expansion stress. If the rivet fasteners are not strong enough or locked securely, they are very prone to loosening or fatigue fracture.

  • Structural connections (e.g. supports, cover main fixings): structural rivets such as Lockbolt or Hemlok with ≥5kN shear strength are required.
  • General fixing points (e.g. cable covers): multi-grip blind rivets can be used to simplify stocking and ease of installation.
  • Dynamic loads: It is recommended to choose rivets with anti-loosening design, mandrel locking, and verified seismic performance.

Factor V. Installation efficiency and tool compatibility

The last and most important thing is to pick the right rivet installation tool. Why is this important? Solar Cover is basically assembled on site, so the installation configuration is based on manual + pneumatic tool operation, and the efficiency directly affects the construction cycle and cost.

  • Batch projects (e.g., power stations/distributed stations): recommend the use of products with clear broken cores and compatible with automatic rivet guns to improve consistency.
  • Maintenance-friendly structure: Specialized low-tension rivets can be used to reduce the burden on installers.
  • Tool adaptation issues: need to confirm in advance that the rivets are compatible with the construction unit’s commonly used rivet gun models (stroke, pull force, opening size).
5 Core factors to consider when choosing rivet fasteners for solar cover

In summary, the selection of Solar Cover rivets is not simply a matter of matching dimensions, but a systematic and integrated judgment of structural mechanics, material suitability, corrosion life and installation feasibility. Correct selection can significantly improve the overall performance and delivery quality of the product, and reduce the risk of maintenance and failure.

Recommended rivet types for solar cover applications

Solar Cover Application ScenarioRecommended Rivet TypeMaterial SuggestionKey Performance Benefits
Aluminum panel / frame protectionTri-Fold Rivets / Closed-End RivetsAluminum / SS stemStress dispersion, anti-tear, corrosion-safe with aluminum
Inverter / control box enclosureSealed Blind Rivets / Bulb-Tite RivetsStainless / Zinc-coatedWaterproof, vibration-resistant, ideal for outdoor electronics
Cable covers / accessory bracketsOpen-End Rivets / Multi-Grip RivetsAluminum / Stainless SteelFast installation, fits varying thicknesses, inventory-saving
Tracker enclosure / wind-load areaStructural Rivets / LockboltsGalvanized or StainlessHigh shear & tensile strength, anti-loosening, long service life

Behind every Solar Cover rivet application is a judgment based on the environment, structural stresses, material properties and mounting method, Rivmate offers standard to customized PV-specific rivet solutions, technical recommendations and sample services for all types of cover structures.

Get Rivet Fasteners for Solar Cover Solutions from Solar Rivet Supplier

In solar energy systems, Solar Cover is an important component for electrical control, module protection and system sealing. The way it is fastened not only determines its structural strength, but also has a direct bearing on the system’s long-term corrosion and vibration resistance and operational stability. Through the systematic explanation in this article, you have already understood the key dimensions involved in choosing the right rivets for Solar Cover – from material suitability, waterproof structure, mechanical properties to construction efficiency, reasonable selection not only enhances the reliability of the system, but also effectively reduces the risk of operation and maintenance and maintenance costs.

As a supplier specializing in PV fastening system solutions, Rivmate has a mature Solar Cover rivet product series, covering tri-fold type, waterproof closed type, multi-grip structure type and other types of products. All of them have passed ISO and RoHS certification, and we can provide one-to-one customized selection service according to module structure and usage scenarios. We not only provide samples, drawings and test reports, but also support riveting tools and installation technical guidance to help customers improve project quality control and delivery efficiency.

📢 Come and meet our engineering team at the Rivmate booth!

We will be showcasing a new generation of rivet solutions for photovoltaics at the upcoming Fastener Expo. This includes customized products for Tracker systems, BIPV projects and automated assembly lines. On-site you will receive:

  • Exclusive rivet sample packs
  • Free structural selection advice
  • Project case studies and technical drawings

Please contact us for a booth number or to schedule a networking appointment to explore more efficient and safer riveting solutions for Solar Cover.

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How to Choose Rivet Fasteners for Solar Panels?

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How to Choose Rivet Fasteners for Solar Panels?

Rivets are an integral part of applications in the solar industry. So do you know what types of rivets are used in solar panels?

By reading this blog, you will come to know about the various knowledge of rivet fasteners for solar panels. This includes the role, impact, selection and common mistakes.

Rivet connections in solar panel (module + holder) systems

Rivet connections in solar panel (module + holder) systems

Rivets assume a key structural connection role in solar panel systems. These fasteners are mainly used for fixing and reinforcing between the module frame, junction box, bracket structure and auxiliary accessories of solar panel.

Compared with bolts or welding, rivets have the advantages of single-sided installation, lightweight, anti-loosening, and adaptability to thin-walled structures. Therefore, rivets are particularly suitable for riveting aluminum alloys and composite materials widely used in photovoltaic systems.

In the module section, rivets are often used to fix the aluminum frame, support piece and junction box bracket of the solar panel. The characteristics of rivets ensure the structural integrity of the module and resistance to wind loads. In the bracket system, rivets connect rails, columns, diagonal braces and other parts. Structural rivets provide high strength, long-term stability, and are an important connection solution to support the safe operation of the entire PV system.

Impact of rivet selection on solar panels

Rivet selection in the solar panel (Solar Panel) system is not just a matter of fastener specifications, the results of its selection directly affect the service life of the entire photovoltaic system, corrosion resistance, structural stability, as well as construction and installation efficiency.

I. Impact on solar panel system lifetime

Solar panel projects are typically designed for a life of 20-30 years. And solar panel fasteners, as the most basic mechanical components of the solar panel system, any early failure may lead to component loosening, structural damage or even system shutdown.

If the selection of improper (such as insufficient strength, grip force mismatch), solar panel rivets may be in the wind load, thermal expansion and contraction, long-term fatigue under the action of falling off or fracture, thus shortening the actual operating life of the system.

For example, if low-strength open end rivets are used in the splicing part of the main bracket, micro-displacement and stress concentration may occur under continuous wind load, leading to fatigue failure of the connection.

Blind Rivets for Solar Panel

II. Impact on corrosion protection performance

Most photovoltaic systems are exposed to outdoor environments, facing rain, moisture, salt spray, ultraviolet rays and other erosion. If the rivet material and structural materials there are galvanic corrosion differences (such as carbon steel rivets with aluminum profiles), will accelerate the corrosion reaction, resulting in connection failure and corrosion diffusion.

Quality rivet selection should give priority to stainless steel, aluminum or Dacromet treatment, avoid the use of bare carbon steel or low quality plated products. This will ensure that the rivet body is electrochemically compatible with the material being joined.

For example, there have been previous cases where aluminum bezel + carbon steel rivets developed red rust within months in a humid environment, with corrosion extending to the junction box or frame structure.

III. Impact on structural stability

There are many types of blind rivets, and different rivet structure types have different grip, shear strength and fitment range. The use of open end rivets can lead to loose connections in high stress structures, while structural rivets (e.g. Monobolt, Lockbolt) provide high strength locking force and vibration resistance, and are suitable for critical connections such as brackets and ground piles.

In addition, the special structure (such as Tri-Fold, Bulb-Tite) can effectively disperse the stress, to avoid the glass or sheet caused by the concentration of pressure injury, to enhance the overall system stability.

Case in point: the use of structural rivets to connect main beams and cross braces can reduce micro-motion wear and enhance wind load resistance and fatigue resistance.

Blind Rivets for Solar Tracking Bracket

IV. Impact on installation efficiency

In the solar module factory packaging line, the use of large flange blind rivets with automatic rivet guns can be realized within 2 seconds per point of installation, significantly increasing production capacity.

The structural form, installation method and grip range of rivets directly affect the construction efficiency and consistency. In large-scale solar module packaging or bracket assembly, the choice of a wide grip range, reliable core breakage, support for automated riveting rivet type (such as Multi-Grip, Tri-Fold) can significantly improve the assembly efficiency.

The single-sided mounting feature also makes them ideal for structures with inaccessible backs, reducing labor requirements and construction difficulties, while avoiding rework later in the process.

How to Choose Rivet Fasteners for Solar Panels?

✅ Component Aluminum Bezel Connection

Aluminum bezels for solar panel’s components are characterized by thin-walled aluminum profiles that require light weight, corrosion resistance, and thermal expansion compatibility. Therefore rivets are required

Rivet type is recommended:

Recommended Materials: Aluminum Body + Aluminum Core or Stainless Steel Core

Recommended Head Type: Round head, small flange

These two types of blind rivets have a lower expansion force, which can effectively prevent the riveting from cracking the solar panel frame. Moreover, the main raw material of bulb tite blind rivets and tri fold blind rivets is aluminum, which can well match the thermal expansion coefficient of aluminum.

✅ Mounting Structure Joints (Main Connections)

Solar Panel Fastening System Solutions

Solar panel supports are always in an outdoor environment. Therefore, they need to carry wind load, snow load, and need to have long-term vibration resistance and high structural reliability requirements.

Recommended Rivet Type:

  • Monobolt Rivets
  • Lockbolt Systems 
  • Hemlok Rivets (High Tensile Mechanical Locking Rivets)

Recommended Materials: Galvanized Steel / Stainless Steel

Recommended Head Type: Round or countersunk head, high grip construction type

These rivets are structural blind rivets. They have high shear and tensile resistance, and they are loosen-proof and can be used as an alternative to bolted joints.

✅ Cable Management & Fixtures

Application Features: Thin sheet construction, fast installation, avoid scratching the surface

Recommended Rivet Type:

Recommended Materials: Stainless Steel / Aluminum

Recommended Head Type: Large Flange Head

Rationale: Uniform expansion, stress distribution, anti-slip, suitable for quick assembly.

Solar Panel Fastening System Solutions

✅ Junction box holder or plastic fixing

The junction box or plastic parts of the solar panel usually need to be mounted on the back side and riveted to a plastic shell material with very limited riveting space.

Recommended Rivet Type:

Recommended Material: Aluminum / Stainless Steel Core

Closed or structural rivets in blind rivets are waterproof and dustproof. The mandrel will not come off after installation is completed, thus providing high strength.

✅ Glass backsheets or composite connections (BIPV / thin film modules)

The glass backsheets or composite materials of solar panels are fragile, sensitive to stress and require cushioning for expansion. Application Characteristics: Fragile materials, sensitive to stress, need to cushion expansion

Recommended Rivet Type:

  • Tri-Fold Rivets
  • Soft-Grip Rivets (cushion construction type)

Recommended Material: Aluminum body + Stainless steel core

This type of rivet after riveting the tail of the three-flap unfolding, dispersing the stress. It can avoid point pressure cracks and is suitable for joining dissimilar materials.

Application AreaRecommended Rivet TypeSuggested MaterialKey Features
Aluminum frame jointsOpen-End / Tri-FoldAluminum / SS stemLightweight, corrosion-resistant, thermal expansion compatible
Mounting structure jointsMonobolt / Lockbolt / HemlokZinc-plated Steel / SSHigh strength, fatigue-resistant, anti-vibration
Cable trays & accessoriesBulb-Tite / Multi-GripAluminum / StainlessFast installation, distributes load, avoids panel damage
Junction box bracketsClosed-End / Small FlangeAluminum / SS stemSealed design, rust-resistant, low-profile for backside use
Glass backsheet / compositesTri-Fold / Soft-GripAluminum / SS stemStress dispersion, safe for brittle materials

Common mistakes and ways to avoid them when using rivets on solar panels

By strictly controlling the rivet selection and installation details, the overall reliability, safety and corrosion resistance of the solar system can be effectively enhanced.

❌ Mistake 1: Carbon steel rivets were chosen to connect the aluminum frame, leading to galvanic coupling corrosion

If you are using carbon steel rivets to rivet an aluminum bezel, there is a good chance that you will have problems. There is a large potential difference between the aluminum and carbon steel, which can form a microcell in environments with moisture or salt spray, accelerating corrosion of the aluminum bezel.

This incorrect connection can lead to oxidation, chalking and even structural failure of the bezel, which will not meet the 25-year durability requirement.

Methods of circumvention:

  • Prefer aluminum or stainless steel rivets. If galvanized steel is used, ensure that it has a closed passivation treatment.
  • For seaside or high salt areas, Dacromet treated or all stainless steel rivets are recommended.
  • Ensure that dissimilar metals are separated by insulating coatings or shims.
How to Choose Rivet Fasteners for Solar Panels

❌ Mistake 2: Using rivets with excessive expansion forces to join glass or composites, leading to cracking

Brittle materials such as glass backsheets, foam sandwich panels, and thin composite panels on Solar panels cannot withstand concentrated expansion stresses.

If the incorrect type of rivet is used, it can cause cracking of the panel, peeling of the sandwich, and result in module seal failure or aesthetic defects.

Methods of circumvention:

  • Use stress-dispersing rivets such as Tri-Fold or Bulb-Tite to avoid concentrated point loads.
  • Control clamping thickness and hole diameter tolerances to avoid over-expansion of the rivet body due to over-gripping.
  • When one of the material combinations is brittle, use soft expansion construction or rivets with rubber gaskets.

❌ Mistake 3: Using general-purpose blind rivets instead of structural rivets to connect the main bracket is not strong enough

Standard general-purpose blind rivets have low tension and shear force, which can’t bear the load of the bracket and wind load.

The use of non-high-strength rivets for connection will cause the connection points of the solar panel to loosen and rivet off, resulting in system structure safety risks.

Method of circumvention:

  • Structural high strength rivets such as Monobolt, Lockbolt, Hemlok, etc. must be used for main support nodes.
  • Require performance indexes of shear ≥5kN and tensile ≥4kN (can refer to specification or project requirements).
  • Confirm the reliability by shear test or pull-out force test.
Common mistakes and ways to avoid them when using rivets on solar panels

❌ Mistake 4: Neglecting to match rivets to installation tool, resulting in unlocked or retained mandrels

When you install solar panel outdoors, you need to use the right riveting tool. Mismatch of riveting force or jaw size is very easy to cause the mandrel not broken, not locked after pulling off.

If you use the wrong tool or wrong installation, the riveting force at the connection point will be insufficient, the mandrel will be loose, the riveting will be false tight and the risk of leakage will be high.

Method of circumvention:

  • Use original or standardized rivet guns with regular checks of pulling force and core break accuracy.
  • Prevent human error by using pneumatic or electric rivet guns that automatically recognize the completion of the pull-off.
  • For structural rivets, prioritize the use of hydraulic tools to ensure installation consistency.

❌ Mistake 5: Improperly designed rivet position, too small a distance from the edge or large hole diameter error

When riveting thin plate materials, you need to consider how to set the rivets. Rivets that are too close to the edge of the plate or holes that are too large will not provide sufficient locking force when expanded.

Insufficient connection force can result in rivet slippage, sheet cracking, insufficient grip and short installation life.

Method of circumvention:

  • Follow the design principle of minimum margin ≥2 x hole diameter to ensure stable riveting.
  • Control the hole diameter and rivet matching within ±0.1mm tolerance.
  • For thin plates/aluminum profiles, preference should be given to large flanges or deep expansion rivets to increase the force area.
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FAQs about Solar Panel Rivet Fasteners

What is the life expectancy of rivets in a solar panel?

The service life of rivets in solar panel systems is typically more than 20 years. This assumes, of course, that the right materials (e.g., stainless steel, aluminum or Dacromet-treated steel) are used and that they have good corrosion resistance and structural stability.

In the design of PV projects, rivets should be used as permanent connectors in line with the life expectancy of the module body and the mounting system. Even in the outdoor high humidity, high salt spray and other environments, more should be selected with ISO certification and salt spray test verification of the PV special rivets. This ensures that they will not corrode, loosen or fail due to structural fatigue throughout the system life cycle.

What quality standards or certifications should PV-specific rivets meet? (e.g. ISO, RoHS)

As a key connecting element in solar energy systems, PV rivets should comply with the following quality standards and environmental certifications to guarantee stable performance, structural safety and compliance with global market requirements:

  • ISO 9001
  • ISO 9227
  • ISO 14589 / DIN 7337
  • RoHS
  • REACH

Rivmate is proud to have all of the above quality certification standards. Rivmate can provide you with high quality solar panel rivets that far exceed international standards:

  • Material Certificate
  • QC Sheet
  • COC
  • Third party certificates (e.g. SGS, TÜV)

Custom Solar Panel Rivet Solutions for Your Solar Business

Rivmate specializes in high performance riveting solutions for the photovoltaic industry. These range from standard blind rivets and structural rivets to customized riveting products for BIPV systems. We understand that every PV project is different in terms of structural design, environmental conditions and installation methods. Therefore, through flexible customization services, we provide our customers with fastening solutions that are matched to the material, grip range, expansion structure and surface finish.

Whether you are a module manufacturer, a racking supplier or an EPC project implementer, Rivmate can provide you with solar-specific rivets that meet international standards (ISO, RoHS, REACH) and are salt spray tested and certified, as well as samples, drawings, assembly recommendations and volume delivery services. Contact us today to customize a riveting solution for your solar business.

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Do Zinc Plated Rivets Rust?

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zinc plated is a common finish for blind rivets. Its purpose is to increase the corrosion resistance of the rivet. So do zinc plated rivets rust?

Through this post you will learn the reasons why zinc plated is used for blind rivets, possible failures and how to extend the life.

The importance of rivets in structural connections

Rivets play a key role in structural connections as a permanent joint. The use of rivets in high-load, long-term stress or vibration environments is an excellent choice. They do not rely on threading or welding and can achieve a high strength bond between different materials. Therefore, they are widely used in transportation, machinery and equipment, and steel construction.

What is a Pop Rivet Tool and What is It Used For

Compared to traditional bolting or welding processes, rivets offer the advantages of ease of installation, vibration resistance and adaptability. The efficiency and reliability of rivets is even more evident if your riveting application is in a thin plate, single-sided operation or automated production environment. Therefore, rivets continue to be an indispensable fastening solution for structures with high demands on connection quality and long-term stability.

Purpose of zinc plating as a common anti-corrosion treatment for rivets

Zinc Plating is one of the most common anti-corrosion surface treatments for rivets. Its main purpose is to form a dense layer of zinc on the surface of the rivet substrate, through the “sacrificial anode” principle to resist the environment of moisture, oxygen and corrosive media on the metal body erosion, thereby extending the service life of the product.

The main purposes of zinc plating are as follows:

  • Corrosion protection: The zinc layer is oxidized first through the “sacrificial anode” effect, protecting the rivet body (usually carbon steel) from rust and corrosion.
  • Extend service life: Reduce the corrosion rate of rivets in humid, salt spray, weak acid and alkali environments to extend the durability of structural connections.
  • Improved appearance: The zinc layer can provide a bright or colored appearance, enhancing the visual consistency and identification of the product.
  • Facilitates Subsequent Processing: Electroplated zinc layers can be used as a primer to facilitate the adhesion of paint, passivation or sealer coatings.
Purchasing cost of zinc plated blind rivets

what is rivets zinc plating?

Zinc Plating of rivets is a surface treatment process in which a thin layer of metallic zinc is plated onto the surface of the rivet. The purpose of this process is to enhance the corrosion resistance and service life of the rivet. This process is widely used for carbon steel rivets and is one of the most common anti-corrosion treatments used in industrial fasteners today.

✅ Process Principle
Zinc plating deposits zinc ions on the surface of rivets through an electrolytic process, forming a dense zinc layer with a thickness of approximately 5-25 microns. The zinc layer acts as a “sacrificial anode”, which is preferentially oxidized when the rivet is subjected to corrosion, thus protecting the rivet substrate (usually mild steel) from corrosion.

Zinc plating is suitable for low to medium corrosive environments, not for strong acids and alkalis, marine or high salt spray environments. For stronger corrosion protection, Dacromet, hot-dip zinc or stainless steel should be used.

Industry applications for zinc plated blind rivets

How the zinc layer protects the substrate through the action of a “sacrificial anode”？

⚙️ Explanation of Electrochemical Principles
When the zinc layer on the surface of a rivet is exposed to an environment containing an electrolyte (e.g., moisture, salt spray) with an iron substrate (e.g., mild steel), the two metals form a miniature primary battery system:

  • Zinc has a lower potential than iron (more reactive) and is preferentially oxidized in the corrosion reaction, becoming the anode.
  • Iron becomes the cathode and is protected by not participating in the oxidation reaction throughout the process.
How the zinc layer protects the substrate through the action of a “sacrificial anode”？

🛡️ Summary of Protection Mechanisms

  • Active Sacrifice: The zinc is corroded first, thus protecting the more valuable or important ferrous substrate materials from rusting.
  • Delayed corrosion time: Even if the zinc layer is scratched or partially broken, the surrounding zinc continues to protect the exposed ferrous substrate.
  • Non-mechanical barrier: Unlike paints or coatings, zinc layers are electrochemically self-protecting before they fail.

This is why rivets remain rust-free for a longer period of time, even when the zinc layer is locally scratched. It is also an important technical advantage of zinc plating which is widely used in industrial rivets, screws and bolts.

Relationship between rivet plating thickness and corrosion protection lifetime

There is a positive correlation between plating thickness and corrosion protection life. The thicker the coating, the longer the corrosion protection life. However, this relationship is affected by a variety of factors and does not increase linearly.

  • The greater the thickness of the zinc layer, the more “sacrificial anode” material is supplied and the longer the protection will last in a corrosive environment.
  • Each additional thickness significantly extends salt spray or atmospheric corrosion life in the same environment.
Zinc Coating Thickness (μm)Salt Spray Test Duration (ASTM B117)Typical Protection Life (Neutral Environment)
5 μm24–72 hours6–12 months
8 μm72–120 hours1–2 years
12 μm120–240 hours2–3 years
25 μm (thick coating)≥ 480 hoursOver 5 years (non-coastal)

Do Zinc Plated Rivets Rust?

Yes, zinc plated rivets will rust. This is likely to happen when you use galvanized rivets in highly corrosive environments. The zinc coating only provides limited protection for a limited period of time and does not provide “permanent protection” against rust.

Under what conditions does the zinc coating fail?

  1. High humidity or wet environments (e.g. coastal, tunnels, ship’s hold): water vapor and chlorides accelerate the corrosion reaction of zinc.
  2. Salt spray or high salt environments: sea breeze, winter salt spreading sections are highly susceptible to rapid corrosion.
  3. Presence of acidic and alkaline corrosive substances: industrial emissions or cleaning agent residues are prone to damage passivation films.
  4. Mechanical damage or uneven plating: Scratches, weak areas or damage from riveting processes lead to exposure and localized failure of the zinc layer.
  5. High temperature environment (> 60°C): the passivation film of the zinc layer of the rivet is unstable and the protection is reduced.
Do Zinc Plated Rivets Rust

Performance of rivets after failure

White Rust

A powdery substance of zinc oxide and zinc hydroxide generated by the initial corrosion of the zinc layer, with a whitish-gray surface.

Red Rust

Once the zinc layer is completely corroded, the inner layer of carbon steel begins to oxidize, appearing obvious reddish-brown rust spots, structural performance decline.

Coating Spalling, Mottling

The surface passivation film or closure layer flakes off, resulting in localized exposure and rapidly spreading corrosion.

What are the key factors affecting the risk of rivet corrosion?

I. Environmental Factors

Humidity and Water Vapor

High humidity or prolonged dewy environment easily leads to electrolyte formation and accelerates corrosion reaction.

Salt and Chloride

Coastal, salt spray, and high salt spray areas (e.g., winter roads) have significantly higher corrosion rates.

pH Extreme Environments

Acidic (e.g. industrial exhaust fumes) or alkaline (e.g. cleaning agents) can damage the zinc passivation film.

Frequent temperature changes

Large temperature differences tend to form condensation and create microcellular corrosion cycles.

Ⅱ. the rivet itself material and surface treatment

Plating thickness and quality

The thinner the plating or uneven treatment, the more likely to localized failure.

Passivation or closed layer treatment

Lack of passivation (e.g. blue-white zinc / colored zinc) or closed layer of galvanized parts, corrosion resistance time is significantly reduced.

Substrate type

Carbon steel is more susceptible to rust than stainless steel or aluminum and requires higher quality protection.

Ⅲ. the structural design and installation mode

Bimetallic contact (galvanic corrosion)

When rivets and connected parts are made of different materials (e.g. aluminum plate + steel nails), the potential difference will accelerate local corrosion.

Gap structure

Tightly fitting pieces or overlapping structures are prone to retain moisture and form crevice corrosion.

Assembly process damage

Riveting process such as zinc layer damage, abrasion or excessive deformation, easy to form a source of corrosion.

Ⅳ. the use of maintenance factors

Long-term unmaintained

No cleaning, no protection, dust and corrosion accumulation will accelerate the damage.

Exposure time is too long

Temporary construction exposure, not timely closed treatment will shorten the service life.

How to extend the life of zinc plated rivets？

Although zinc plated rivets have basic corrosion resistance, their effectiveness is greatly affected by the environment. By improving the quality of plating, structural protection design and construction and maintenance coordination, can significantly improve its corrosion resistance life, to extend the service life of the connection structure.

Method 1. Selection of suitable plating layer and post-treatment process

Improving the corrosion resistance of rivets is first and foremost a matter of optimizing the quality of their surface treatment. By selecting a thicker zinc coating (e.g. ≥ 12 μm), the “sacrificial anode” function can be significantly improved. This enables the zinc coating to withstand corrosion loads for a longer period of time and protects the substrate from erosion. At the same time, the increased thickness of the coating is also effective against the localized effects of mechanical abrasion and stress corrosion.

In addition, passivation and seal coating are key supporting measures. Passivation (e.g. blue-white zinc or colored zinc) forms a stable oxide film on the surface of the zinc layer and reduces the reaction rate of zinc. Seal coatings are an effective secondary line of defense against corrosion in harsh environments by sealing the micropores and cracks on the surface of the plating and preventing the penetration of moisture and electrolytes. Both with the use of rivets in complex environments can significantly enhance the ability to serve.

How to extend the life of zinc plated rivets？

Method 2. Reasonable selection and structure matching

The selection of rivets should give full consideration to the use of the environment, to avoid the blind selection of low anti-corrosion grade electro-galvanized rivets.

In heavy pollution, high humidity or coastal salt spray environment, should give priority to hot dip galvanized, Dacromet or stainless steel rivets, to reduce the risk of corrosion from the source. Electro-galvanized products are more suitable for indoor, neutral environments and should not be used as a long-term substitute for higher-grade products in structures with well-defined life requirements.

In addition, galvanic coupling corrosion is an important factor affecting the corrosion failure of rivets. When the rivet and the connected material potential difference is large (such as steel nail with aluminum), in the presence of electrolyte will form a microcell, resulting in the anode material (usually rivets) to accelerate corrosion. Selection should try to match the potential close to the combination of materials, or in the interface coated with insulating coatings, inhibit the occurrence of electrochemical corrosion reactions.

Method 3. Installation protection and construction attention

The impact of the construction and installation process on the service life of rivets can not be ignored. Riveting process if the use of improper tools, or operation is not standardized (such as knocking, eccentric force), easy to cause the surface of the zinc layer scratches, cracks or even peeling, the formation of local corrosion source points. Therefore, special installation tools should be used to ensure uniform clamping force and smooth breaking process to protect the integrity of the plating layer.

5 Types of Pop Rivets for Metal and Their Uses

From a structural point of view, the design should avoid the formation of waterlogged gaps or overlapping structures that are difficult to drain. Because this kind of “sandwich gap” is easy to hide water and moisture, is the high incidence of crevice corrosion and microbial corrosion area. Ventilation and drainage holes should be designed in key areas, or open seams and seals should be used to prevent water vapor retention, thereby enhancing overall durability.

Method 4. Post maintenance and environmental management

Even if the initial selection and construction is reasonable, the later maintenance is still critical to extend the life of the rivets. It is recommended that a regular inspection mechanism be established during use. For outdoor structures or highly corrosive areas, the rivet perimeter should be cleaned regularly to remove salt spray deposits, dust, oil and other contaminants that may accelerate corrosion.

When damage to the zinc layer, the first appearance of white rust or localized red rust spots are found, local repair treatment should be carried out immediately. Such as the use of cold galvanizing spray paint, zinc powder coating, sealant on the defective parts of the cover protection. This “maintenance instead of repair” protection idea can not only slow down the spread of corrosion, but also extend the usable cycle of the structural connection, reducing long-term maintenance costs.

wholesale high quality zinc plated rivets from rivmate

Choosing Rivmate wholesale high quality zinc plated rivets not only means getting quality fasteners with stable performance and consistent appearance, but also guaranteeing the reliability and cost efficiency. It’s a guarantee of reliability and cost efficiency.

Rivmate offers a wide range of standardized zinc plated rivets. Widely used in building hardware, machinery assembly, transportation equipment and other fields. And support bulk purchasing and customization services, is the ideal partner for industrial customers seeking long-term supply security and quality consistency.

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The Complete Guide to Zinc Plated Blind Rivets

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The surface of Zinc Plated Blind Rivet is covered with a zinc metal coating through an electroplating process. As a result, the corrosion resistance, surface stability and range of environments in which it can be used are greatly enhanced. In addition, the conditions and methods of use of Zinc Plated Blind Rivets are the same as those of ordinary Blind Rivets.

This blog will focus on zinc plated blind rivets. Including its definition, benefits, applicable types, applications, and purchasing costs.

what are zinc plated blind rivets?

What Are Zinc Plated Blind Rivets

Zinc Plated Blind Rivet is a fastener with a zinc metal coating applied to the surface of a carbon steel blind rivet through an electroplating process. This finish was selected to improve the corrosion resistance, surface stability and environmental range of blind rivets. These rivets are identical in construction to standard blind rivets and can be used to make permanent connections to sheet metal, profiles or housings by one-sided operation, and are commonly used in construction, equipment, and electrical assemblies.

Zinc plated blind rivets offer significant corrosion resistance advantages over ungalvanized blind rivets. In wet, lightly corrosive environments, zinc plated blind rivets are effective in extending service life and maintaining a consistent appearance.

In addition, the zinc coating slows down oxidized spots and red rust. Exposed carbon steel rivets, on the other hand, are prone to rapid corrosion upon exposure, leading to structural failure or aesthetic degradation. As a result, zinc plate is routinely the preferred solution for cost-effective, basic protection requirements.

Advantages and benefits of blind rivets zinc plating

Zinc plated of Blind Rivets is a common metal protection and enhancement process. By forming a metallic zinc coating on the surface of the rivet (usually electroplated or hot-dip plated), this process accomplishes several important things:

  1. Corrosion protection: The zinc layer effectively isolates the rivet substrate from direct contact with moisture, oxygen, acid and alkali environments.
  2. Enhance surface stability: Reduce surface oxidation and corrosion, reduce maintenance and replacement costs.
  3. Provide basic aesthetics: galvanized surface is blue-white, colored zinc and other natural metal tones, more neat than the original steel.

How much corrosion protection is improved?

Zinc Plating TypeCoating Thickness (μm)Passivation TreatmentSalt Spray Resistance (No Red Rust)
Electroplated Zinc (Blue White)5–8 μmTrivalent Chromium (Blue White)72–96 hours
Electroplated Zinc (Yellow/Color)8–10 μmTrivalent Chromium (Iridescent)120–168 hours
Thick Zinc Plating (Heavy Duty)≥12 μmHigh-performance passivation + seal240–300 hours
Hot-Dip Galvanized (rare for rivets)≥30 μmNo passivation needed≥500 hours (not suitable for small parts)

Estimated percentage upgrade (compared to untreated carbon steel rivets)

Ungalvanized rivets: red rust can appear within 24 hours in high humidity or salt spray environments.

After galvanized treatment:

  • Ordinary blue-white zinc can enhance the corrosion protection time to more than 3-4 times;
  • Colored zinc treatments enhance protection up to 5-7 times;
  • High-performance passivation/sealing solutions can be upgraded by more than 10 times (theoretical 300+ hours without red rust).

What types of blind rivets are galvanized?

Blind Rivet materials suitable for Zinc Plating are mainly carbon steel, followed by some copper alloys. Stainless steel and aluminum are not recommended for zinc plating due to poor plating suitability.

Material TypeZinc Plating SuitableCompatibility NotesRecommended LevelTypical Applications
Carbon SteelYesExcellent plating adhesion, ideal for barrel or rack plating★★★★★Industrial fasteners, enclosures
Alloy SteelYes (with precautions)Risk of hydrogen embrittlement; requires controlled process★★★★☆Structural or high-strength riveting
Copper / BrassConditionallyCan be plated, but nickel/tin preferred for appearance or conductivity★★☆☆☆Internal joints, non-visible parts
Stainless SteelNoPoor adhesion, peeling risk; not recommended★☆☆☆☆Use as-is without plating
Aluminum / AlloysNoVery poor adhesion; high galvanic corrosion risk★☆☆☆☆Use anodizing or painting instead
What types of blind rivets are galvanized

Blind Rivets Zinc Plated Thickness and Standard

zinc plated thickness

The thickness of the galvanized layer for blind rivets is set according to the environment in which the rivets are used, the level of corrosion protection required, and the processing technology (e.g. electroplating, hot-dip plating).

There are three common ways to zinc plated blind rivets:

  • Electro-galvanized: coating thickness 5-12 μm. This is the amount of galvanization used for standard rivets and is suitable for indoor or medium humidity environments.
  • Heavy Zinc: Plating thickness of 12-15 μm. This is required for high corrosion resistance and requires control of dimensional tolerances and plating uniformity.
  • Hot-Dip Galvanizing: Plating thickness ≥ 30 μm. This thickness is rarely found on rivets and is suitable for large structural parts.

standard

There are three main international standards for zinc plated blind rivets: ASTM B633, ISO 4042 and ROHS/REACH.

Rivmate is proud that its zinc plated blind rivets are fully compliant with these standards.

Precautions:

  • The higher the plating thickness, the more difficult it is to control the dimensional tolerances, especially in the grip area;
  • Roller plating is suitable for small-size high-volume rivets, but the plating may be slightly uneven, thin edge area;
  • Plating adhesion is closely related to the quality of pretreatment, pickling and descaling and activation must be standardized.

Recommended Use: Choose Zn5-Zn8 (5-8μm) for general industrial use. For structures with a moderate risk of corrosion or in wet environments, thickness grades of Zn12 (12μm) and above are recommended.

Industry applications for galvanized blind rivets

zinc plated blind rivets are used in a large number of applications in several industrial sectors due to their cost-effectiveness and wide range of applications. If your application is a scenario where there are basic requirements for structural strength but the corrosion protection level is not extremely high, then zinc plated pop rivets are a good choice.

✅ Main application industries

  • Home appliance manufacturing: used in the shell, bracket and internal connection parts of air conditioners, refrigerators, microwave ovens and washing machines.
  • Industrial equipment and sheet metal manufacturing: power distribution cabinets, operating boxes, machinery shrouds, bracket assembly, etc.
  • Metal furniture and building materials components: iron cabinets, shelves, aluminum profile joints, light box frames, etc.
  • Vehicles and transportation equipment: trailer guards, bus interior parts, door structures, and other non-load-bearing areas.
  • Assembly-type low- and medium-voltage electrical products: switch panels, radiators, wire bridges, etc.
Industry applications for zinc plated blind rivets

⚠ Basic requirements for the installation environment

  • Suitable for indoor, light industrial, low corrosive environments;
  • Can be used in relatively humid environments, but prolonged flooding or high salt spray conditions should be avoided;
  • Not recommended for use in exposed seashores, acid and alkali corrosive areas or high temperature chemical environments;
  • For outdoor use, thick zinc plated + colored zinc passivated versions should be used or upgraded to stainless steel/aluminum anodized rivets.

Are there galvanic corrosion problems?

Galvanic corrosion may occur when using zinc plated rivets on aluminum, copper, and stainless steel. This phenomenon is more pronounced if the application environment is humid.

Since zinc has a lower electrode potential than many structural metals, it acts as a “sacrificial anode” in galvanic couples, accelerating its own corrosion in order to protect adjacent metals. This is likely to lead to early failure of the rivet or the spread of corrosion spots.

Are there galvanic corrosion problems

In order to avoid galvanic corrosion, it is recommended to take the following measures from the design and process:

  1. Try to choose the rivet material close to the potential of the connected material, such as carbon steel plate with carbon steel zinc plated rivets.
  2. Use insulating gaskets, plastic washers or anti-corrosion coatings in the assembly structure to block the direct contact between metals.
  3. Seal riveted areas to prevent moisture from entering the gap and creating an electrolytic environment.

Purchasing cost of galvanized rivets

Compared to stainless steel rivets, zinc plated rivets typically cost 30% to 50% less. The raw materials used in the manufacture of zinc plated rivets are generally low cost carbon steel, low energy processing, and the electro-galvanizing process is well established and suitable for volume roll plating. Galvanized rivets are a cost-effective choice for general industrial applications where corrosion resistance is not particularly demanding. If your usage scenario is for high-volume assemblies, one-off structural components or non-exposed joints, zinc plated rivets will be more suitable for you.

Purchasing cost of zinc plated blind rivets

Zinc plated rivets also offer a cost advantage over nickel plated rivets, with typical unit cost savings of approximately 20-30%. The higher price of nickel and plating requirements make nickel-plated rivets more suitable for products that require electrical conductivity, aesthetics or greater corrosion resistance. Galvanized rivets, on the other hand, while slightly less attractive in terms of appearance and long-life protection, are adequate for most low to medium corrosive environments, making them a practical solution that balances performance with budget.

wholesale zinc plated blind rivets from Rivmate

Why would you choose to use zinc plated blind rivets? It is a combination of cost and performance options. Therefore, the quality and price of galvanizing is very important. You need to get the best value for money riveting solution from the rivet manufacturer!

Rivmate — The Leading Blind Rivet Manufacturer and Supplier in China.

You can get solutions from Rivmate that will fully meet your needs and satisfy you. Contact our engineers and get a sample rivet for testing!

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The Complete Guide to Nickel Plated Rivets

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The surface of Nickel Plated Rivet is covered with a metallic nickel coating through an electroplating process. The purpose of this coating is to enhance the rivet’s corrosion and abrasion resistance, electrical stability, and to give it a bright silver-white appearance.

This article will introduce you around “nickel plated rivets”. It includes the definition of nickel plated blind rivets, the role of nickel plated, applications and standards.

What are nickel plated rivets?

What are nickel plated rivets

Nickel-plated rivets are rivets with a metallic nickel coating applied to the surface of the rivet body (made of metal, such as carbon steel, copper or brass) through an electroplating process. The thickness of this coating is usually 3-10 μm, and the main purpose is to improve the corrosion resistance, wear resistance, electrical stability of the rivet, and to give it a silver-white glossy appearance.

Nickel plated rivet vs uncoated rivet

AttributeNickel Plated RivetUncoated Rivet
Surface TreatmentElectroplated nickel layer (3–10 μm)No surface treatment, bare metal
AppearanceBright silver or matte metallic finish, decorative appealRaw material color (gray steel, red copper, yellow brass)
Corrosion ResistanceExcellent (nickel barrier prevents oxidation)Poor to moderate (prone to rust or oxidation)
Wear ResistanceHigh (hard nickel layer resists scratching)Depends on base material; generally lower
Electrical ConductivityGood conductivity, suitable for electrical applicationsVaries (copper is good; steel is lower)
Surface SmoothnessLow friction, good for automated installationHigher friction, risk of jamming or equipment wear
Environmental ComplianceElectroplating involves heavy metals; must meet discharge controlsNo plating-related risk, but lacks corrosion protection
CostSlightly higher (includes plating cost)Lower (based only on base material)
Typical ApplicationsElectronics, appliances, decorative fasteners, precise assemblyInternal joints, low-visibility, disposable or sealed areas

Nickel-plated rivets are electroplated with a layer of nickel metal on the surface of the rivet, which has good corrosion resistance, abrasion resistance and electrical conductivity, and at the same time has a silver-white glossy appearance. This makes them ideal for assembly applications where both aesthetics and functionality are required. The plating also reduces surface friction and improves automated assembly efficiency.

In contrast, the non-nickel-plated rivets are bare metal, although the cost is lower, but the corrosion resistance is weak, easy to oxidize and rust, suitable for embedded structures, non-exposed parts or the environment does not require high protection. Selection should be based on the use of the environment, appearance needs and functional requirements of a comprehensive judgment.

The role of rivet nickel plating layer

Nickel plating on the surface of rivets is mainly achieved through an electroplating process to form a dense, highly adherent nickel metal coating, usually 3-10 microns thick. This coating improves the physical properties of rivets.

1. Corrosion protection
The nickel layer can effectively isolate the air, moisture and acids and alkalis on the rivet substrate erosion. This significantly improves its service life in wet, high humidity or corrosive environments.

2. Enhance wear resistance
Nickel has a high hardness, the coating formed after plating can enhance the rivet surface scratch resistance.

3. Enhance the appearance of texture
Nickel-plated surface is silver-white shiny or matte metallic texture, visual aesthetics and unity.

4. Improve assembly smoothness
The nickel layer reduces the coefficient of friction, which helps to improve the stability and efficiency of the automatic feeding, positioning and riveting process.

5. Good electrical conductivity
Nickel is an electrically conductive metal, suitable for assembly structures that require grounding or signal connections.

The role of rivet nickel plating layer

Comprehensive Advantages

✔ Extend rivet life

✔ Gives a high-end metallic look

✔ Support electrical performance needs

✔ Improve reliability and assembly efficiency

✔ Can be used as a RoHS compliant chrome-free protection alternative (subject to process control)

What materials can nickel plating be used for rivets?

In rivet manufacturing, nickel plating processes can be used on a wide range of metal substrates. However, there are differences in suitability, performance and application value.

1. Carbon Steel Rivets

Applicability: The most common nickel-plated base material with a proven process.

Advantage: Significantly improve rust resistance, wear resistance and appearance quality.

Typical applications: structural components, industrial assemblies, decorative rivets.

2. Stainless Steel Rivets

Applicability: Can be plated, but special surface activation treatment is required.

Limitations:

  • Plating adhesion is relatively weak, easy to peel off due to thermal expansion and contraction or self-passivation.
  • Higher cost, usually used for decorative or locally conductive applications.

Recommendation: Not recommended for high strength riveting or heavy corrosive environments.

3. Copper / Brass Rivets

Suitability: excellent, good adhesion, flat and bright plating.

Advantage:

  • Exquisite appearance, suitable for decorative rivets.
  • Maintains good electrical conductivity, suitable for electrical contact applications.

Typical applications: electronic assembly, bag fasteners, appliance decorative parts.

4. Aluminum rivets (intermediate layer required)

Applicability: The natural oxide film on the surface of aluminum prevents direct nickel plating and cannot be plated directly.

Solution: Replacement plating (e.g. zinc or copper intermediate layer) is required before electroplating nickel.

Limitations:

  • Complicated process, unstable adhesion, easy to peel off due to riveting deformation.
  • High cost, not applicable to regular mass production.

Suggestion: If anti-corrosion or appearance treatment is required, anodizing is more recommended as an alternative.

Rivet MaterialNickel Plating SuitabilityProcess FeasibilityRecommendation LevelRemarks
SteelYesHighly mature★★★★★Excellent for corrosion protection and decorative finish
Stainless SteelPossible (with activation)Requires special prep★★☆☆☆Limited to non-structural or decorative applications due to adhesion risks
Copper/BrassYesExcellent adhesion★★★★★Ideal for electrical and aesthetic uses; bright, conductive finish
AluminumNot directly suitableNeeds intermediate layer★☆☆☆☆Complex process; anodizing is preferred for corrosion or appearance needs

Whether there is a potential for galvanic corrosion？

Nickel-plated rivets present a potential risk of galvanic corrosion (also known as “galvanic differential corrosion”) in certain usage scenarios.

  • Nickel-plated carbon steel rivets when assembled on aluminum or magnesium alloy substrates;
  • Nickel-plated copper rivets when used on stainless steel or aluminum profiles;

Both of these conditions may result in corrosion spots (commonly known as “creeping rings”) on the substrate around the rivet. Alternatively, the contact area may fail and the structure may loosen; long-term use may jeopardize the overall sealing and mechanical integrity of the assembly.

applications of nickel plated rivets

1. Home appliance industry

Typical products: microwave ovens, rice cookers, air conditioners, refrigerators.

Application reason: Nickel-plated rivets can provide better electrical conductivity and oxidation resistance, suitable for electrical contact parts or decorative surface connection.

2. Automobile manufacturing

Typical parts: lights, interior decorative parts, electrical system joints.

Application reasons: anti-corrosion, weather resistance, suitable for exposed environments or electrical connectors.

3. Electronic and electrical equipment

Typical products: relays, sockets, terminals, motor parts.

Reason for use: Nickel plating enhances electrical conductivity, prevents oxidation, and is particularly suitable for precision electronic assemblies.

4. Communication equipment

Typical products: racks, connectors, communication terminals.

Reason for application: Connection points that require wear resistance and stable electrical properties.

5. Lighting and decorative hardware

Typical products: chandeliers, table lamps, decorative panels.

Reason for application: nickel plated surface is bright, has good visual effect and anti-oxidation.

6. Medical equipment

Typical products: housing connectors, instrument fixing parts.

Reason for application: High cleanliness requirement, nickel plated surface is corrosion resistant and easy to clean.

The Complete Guide to Nickel Plated Rivets

Rivet Nickel Plated Specifications & Standards

Nickel-plated rivet coating thickness standard

TypePlating ThicknessTypical Application
Decorative Nickel Plating0.5 – 5 μmHigh appearance demand, light-duty use
Functional Nickel Plating5 – 25 μmCorrosion resistance, conductivity
Heavy-Duty Industrial≥25 μmHarsh environments (marine, heavy industry)

Nickel plated rivets are commonly used for connectivity and electrical conductivity, and the majority of nickel plating thicknesses fall in the 5-10 μm range. This thickness provides both corrosion protection and cost control.

Compliance: RoHS / REACH / ISO

Nickel plated rivets are in most cases RoHS and REACH compliant.

For RoHS, as long as no restricted substances such as hexavalent chromium or cadmium are used in the plating process and a trivalent chromium or chromium-free process is used, it can basically be considered compliant.

For REACH, if the plating raw materials and processes do not involve Substances of Very High Concern (SVHC), along with material traceability and wastewater treatment compliance measures, they can also be considered as compliant with EU requirements. In addition, if we refer to ISO 4527 (plating quality), ISO 14588/15977 (rivet size and performance) and ISO 9227 (salt spray test) standards for production, it will be more quality assurance and international accessibility.

Nickel plated blind rivets —— cost & sourcing tips

Nickel plated blind rivets —— cost & sourcing tips

cost of nickel plated rivets

The price of nickel-plated rivets mainly depends on the material, structure, plating thickness and purchase quantity. Take the common 4.8×12mm size for example:

  • Nickel-plated rivets made of carbon steel cost between $6 and $12 per thousand for general structural connections and are more cost-effective.
  • Aluminum rivets are slightly more expensive, usually between $ 9 and $ 16, because of its light weight and better corrosion resistance is more suitable for precision assembly or electronic equipment.
  • Stainless steel rivets are usually priced between $18 and $30 due to the cost of the material and the difficulty of machining, and are often used in applications requiring higher strength and corrosion resistance, such as outdoor or electrical systems.
  • If customized rivets with countersunk heads, large flanges or special constructions are required, the price will be 10 to 20 percent higher than the standard basis.
  • Products requiring higher nickel thickness (e.g., more than 10 microns) or RoHS/REACH compliance may increase in price by 5 to 15 percent.

sourcing tips of wholesale nickel plated blind rivets

When purchasing in large quantities, in order to improve the cost-effectiveness and control the risk, it is recommended to pay attention to the following points:

  1. Unify specifications: Try to integrate internal requirements and unify rivet sizes and head types in order to improve purchasing concentration and compress unit costs.
  2. Prioritize standard parts: Use products with international standard (e.g. ISO or GB) dimensions.
  3. Ensure plating quality: Require suppliers to provide actual nickel layer thickness test reports (e.g. XRF test) and salt spray test results to avoid the problem of apparently qualified but poor plating adhesion.
  4. Clarify environmental protection requirements: Ensure that products comply with regulations such as RoHS and REACH. It is recommended that suppliers be required to provide compliance reports within the validity period when purchasing.

Nickel-plated rivets installation and use of precautions

Nickel-plated rivets in the installation before the need to confirm the integrity of the coating, specification matching and hole diameter tolerance, to avoid inconsistent dimensions or installation interference resulting in coating peeling, connection failure.

During installation, matching riveting tools should be used and tension should be controlled to prevent deformation of the rivets or abnormal mandrel breakage. At the same time, attention should be paid to avoid oil or chemical contamination of the nickel layer to ensure that its conductivity and anti-corrosion properties are not destroyed.

After installation, the clamping force and plating condition should be checked. Confirm that there is no looseness, eccentricity or local corrosion problems. In applications with high electrical grounding or corrosion protection requirements, it is recommended to conduct conductivity testing and environmental adaptability verification. If there is any conductivity abnormality or risk of mass failure, the operation process and field procedure should be optimized in time.

custom nickel plated rivets for your business

At Rivmate, we specialize in custom nickel plated rivets.

Each rivet is customized to your exact specifications. Plating thicknesses and compliance standards are fully compliant with your standards. Seamless integration into your production line is guaranteed.

Choosing Rivmate means working with a manufacturer that has extensive experience in rivet manufacturing. We offer scalable production, strict quality control and fast lead times. From prototype development to high-volume orders, our custom nickel-plated rivets work consistently, cleanly and reliably in the field.

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What Are Black Anodized Pop Rivets and Their Uses?

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Black Anodized Pop Rivets are blind rivets with a special surface treatment. It is anodized to form a dense black oxide film on the surface of the rivet. This not only enhances its corrosion and wear resistance, but also gives it a good decorative effect.

The application of this type of Rivets not only meets the basic needs of structural fixing, but also emphasizes the combination of aesthetics and durability. With the market’s emphasis on product appearance details and long-term performance, black anodized Rivets have become the Rivets choice for many engineers and product designers in the selection process. In this article, we will discuss its working principle, typical application scenarios and how to select the right type, in order to help you introduce it into the assembly system more efficiently.

what are black anodized pop rivets?

what are black anodized pop rivets

Black Anodized Pop Rivets are an anodized and blackened aluminum blind rivets. This type of rivet combines mechanical properties, corrosion resistance and aesthetic appearance. They are used in a wide range of scenarios where a structural connection + a black decorative effect is required. Examples include aluminum panels, black equipment housings and outdoor structures that require long-term weathering performance.

Black anodized pop rivets can not only meet the basic needs of structural connection, but also significantly improve the consistency and durability of the overall appearance of the product. Its anodized layer forms a dense, wear-resistant, corrosion-resistant oxide film, and the black color is very stable and not easy to fade.

What does black anodizing do on blind rivets?

Black anodizing enhances the corrosion and abrasion resistance of blind rivets and gives them a consistent, attractive and durable finish.

  1. Enhanced corrosion resistance: Anodizing treatment will form a dense oxide film on the surface of the rivet body, which can effectively block the erosion of air, moisture and chemical media.
  2. Enhance the surface hardness and abrasion resistance: the oxidized layer has high hardness, with good scratch resistance and impact resistance.
  3. Provide decorative black appearance: achieve the visual effect of consistent color tone and professional texture.
  4. Improves surface performance: the oxide film acts as an insulating layer, preventing the risk of galvanic corrosion or short circuits.
What Are Black Anodized Pop Rivets and Their Uses

Black anodizing gives the blind rivet both cosmetic and functional advantages. It provides not only high performance in structural connections, but also a high degree of visual harmonization, meeting both industrial and aesthetic needs.

In terms of appearance, black anodizing creates a matte or semi-gloss uniform black surface with a calm tone and strong texture. Therefore, it can be perfectly integrated into ferrous metals, electronic equipment cases, architectural curtain walls and other application environments, realizing the consistency and professionalism of product appearance.

Functionally, the anodized layer has excellent corrosion resistance, oxidation resistance and surface hardness. Therefore, it can effectively resist water vapor, salt spray, friction and scratches, significantly extending the service life of rivets in outdoor, humid or industrial environments. It also provides a level of electrical insulation that makes it safer and more reliable in electronic and electrical structures.

Process characteristics of black anodized Pop rivets

Black anodizing is a common surface treatment for rivets, the main purpose is to enhance their corrosion resistance, aesthetics and a certain degree of hardness. The following is a typical black anodizing process:

1. Pre-treatment

  • Degreasing and degreasing: Use alkaline cleaners or solvents to remove surface oils and impurities.
  • Water rinsing: Neutralize residual lye to prevent contamination from subsequent treatments.
  • Alkaline or acid etching (optional): Uniformly removes oxidized layer and creates a rough surface that helps film adhesion.

2. Anodizing

  • Electrolyte: Sulfuric acid solution (15-20%) is usually used.
  • Voltage/current control: Maintained between 12-20 volts, adjusted according to material thickness.
  • Temperature control: Maintained at 15-25°C to obtain a dense and uniform oxide film.
  • Anode polarity: workpiece is connected to the anode, the cathode is mostly lead or stainless steel plate.
What Are Black Anodized Pop Rivets and Their Uses

3. Black dyeing

  • Dye type: organic dyes (such as acid black) or inorganic dyes (such as iron salt precipitation method).
  • Time control: immersion time to control the depth of dyeing, often 5-15 minutes.
  • Temperature and pH: Generally, the temperature of the dyeing bath is 40-60°C, and the pH should be kept stable to ensure uniform dyeing.

4.sealing

In order to close the pores of the oxide film, prevent the dye from seeping out and improve the corrosion resistance of the rivets. Rivet manufacturers commonly use hot water sealing, nickel salt sealing or nano sealing liquid. The rivets are sealed in hot water at 95-100°C for 10-30 minutes.

5. Drying and quality inspection

Finally dry the rivets using hot air or naturally. Then check the rivets for color uniformity, film thickness (usually 10-25 microns), adhesion, and corrosion resistance.

The principle of black anodizing to enhance the hardness and corrosion resistance of rivets

Black painted rivets provide protection and aesthetics by physically covering the surface with a coating layer such as powder or paint. The coating has good adhesion and weathering resistance, which is especially appropriate for aluminum rivets or applications that require a customized appearance. Spraying creates a thick, uniformly colored film that is resistant to UV light and humidity, but is prone to flaking or cracking in areas of high friction or mechanical deformation.

Black plated rivets, on the other hand, use electrochemical deposition of a layer of metal (such as zinc, nickel) and black passivation treatment, forming a dense and firmly attached metal protective layer. Its advantage lies in good wear resistance and low-cost batch processing capability, especially for carbon steel rivets, but not for aluminum, and the black plating layer in long-term outdoor use may fade or passivation layer degradation.

Sprayed Black Rivets vs Electroplated Black Rivets

CategoryBlack Painted RivetsBlack Electroplated Rivets
Surface TreatmentPowder or liquid paint coating, cured with heat to form a protective layerElectrochemical deposition of metal (e.g., zinc, nickel) followed by black passivation
Adhesion MechanismPhysical adhesion, dependent on surface prep and curingElectrochemical bonding, strong metal-to-metal adhesion
Base Material SuitabilitySuitable for aluminum, steel, stainless steelPrimarily for carbon steel; not suitable for aluminum
Corrosion ResistanceGood, with sealed coating preventing moisture ingressExcellent, especially with black zinc + sealing combinations
Wear ResistanceModerate; coating is thick but may scratch or wearHigh; metal plating offers greater surface hardness
Coating ThicknessThick (60–100 μm), easily adjustableThin (5–15 μm), limited to prevent brittleness
UV/Weather ResistanceGood (especially polyester powder); suitable for outdoor useModerate; black passivation may fade over time
Appearance UniformityEven coloration; available in matte, gloss, and textured finishesProne to slight color variations or flow marks
Defect CoverageCan mask surface imperfectionsRequires high surface prep; flaws are more visible
Deformation ToleranceCoating may crack or peel under mechanical deformationGood; plating remains intact under forming or riveting stress
Unit CostMedium to high, especially for small batches or multicolor requirementsLow; cost-effective for high-volume standard fastener production
Environmental ImpactPowder coating is VOC-free and environmentally friendlyElectroplating involves heavy metal wastewater, requiring robust treatment
Recommended Use CasesAluminum rivets, decorative or exposed parts, outdoor applications, custom finishesCarbon steel rivets, high-volume runs, cost-sensitive or wear-critical applications

Why choose black anodized pop rivets?

Why choose black anodized pop rivets
  • Enhanced corrosion resistance: Anodizing treatment forms a dense oxide film, which significantly improves the corrosion resistance of the rivets. Compared with ordinary rivets, black anodized pop rivets have a longer service life.
  • Consistent Appearance and Enhanced Product Value: Black anodized pop rivets are visually compatible with most industrial products or structural components, avoiding the abruptness caused by silver colored rivets. For users, this means higher end-product aesthetics and professional image.
  • Less susceptible to discoloration: Compared to painting or dyeing processes, anodized colors are more stable and less likely to fade, flake or contaminate surrounding surfaces.
  • Balancing strength and lightweight: Anodizing allows rivets to be strong enough to be used while maintaining a lightweight design.

applications of black anodized pop rivets

Black anodized pop rivets are used in industrial and consumer applications where uniformity of appearance, harsh environmental conditions, or long-term durability are required.

  • Electronic and electrical equipment manufacturing: server chassis, power supply boxes, audio equipment, surveillance camera housings, etc.
  • Architecture and curtain wall system: aluminum alloy window frames, curtain wall panels, metal decorative panels, facade sunshade system
  • Automotive and motorcycle parts: interior trim panels, dashboard brackets, fenders, body sheet metal edges and corners.
  • Consumer electronics products: black metal shell cell phone bracket, TV bezel, tablet shell fixed
  • Security and lighting equipment: road camera shells, infrared lamps, outdoor LED lighting assembly
  • Aerospace and rail transportation lightweight components: interior trim parts, wire harness brackets, antenna covers, cabin trim panels
  • Military & Tactical Equipment: Tactical Cases, Portable Devices, Drone Housings, Night Vision Devices
applications of black anodized pop rivets

Best black anodized pop rivets pick and match advice

In practical applications, the selection of the best Black Anodized Pop Rivets should take into account the substrate material, environmental conditions, load requirements and appearance consistency. The following is a list of recommended options:

Application ScenarioRecommended Rivet Body MaterialMandrel MaterialDiameter (Typical)Grip RangeKey Advantages
Indoor Electronics (Chassis, Panels)Aluminum (Black Anodized)Aluminum3.2mm / 4.0mm1.0–6.0mmLightweight, aesthetic, easy to install
Outdoor LED Fixtures, Camera HousingsAluminum (Black Anodized)Stainless Steel4.8mm1.5–9.5mmCorrosion-resistant, outdoor-ready
Building Facades / Cladding SystemsAluminum (Black Anodized)Stainless Steel4.8mm / 6.4mm3.0–12.0mmHigh strength, visual uniformity
Automotive Interiors / Bracket MountingAluminum (Black Anodized)Steel4.0mm1.0–5.0mmBalanced strength and cost control
Outdoor Structural ComponentsStainless Steel (Black Coated)Stainless Steel4.8mm / 6.4mm4.0–10.0mmMaximum durability, excellent corrosion resistance
Consumer Electronics (Visible Assembly)Aluminum (Black Anodized)Aluminum3.2mm1.0–3.5mmExcellent appearance, tight color control

Other Selection Points:

  • Color difference control: Prefer batch anodizing, control the thickness of oxide film within 10-15μm, to ensure the stability of color difference.
  • Clamping material matching: avoid electrochemical corrosion, aluminum with aluminum/stainless steel with stainless steel is preferred.
  • Matching of installation tools: Match with appropriate manual or pneumatic rivet guns to ensure clean core breakage and avoid affecting the appearance.

Why do we recommend black anodized pop rivets?

Black Anodized Pop Rivets combine corrosion resistance, high strength and an attractive black appearance. Black anodized blind rivets are an excellent choice if your business or riveting project requires a uniform appearance and long-term durability. In applications such as electronic equipment, architectural finishes and outdoor structures, the anodized finish of black anodized pop rivets ensures that the color will not fade or flake, enhancing the overall product quality and longevity.

For matching suggestions, sample testing or technical support, please contact us. We can provide standard or customized solutions for your application, helping to optimize assembly efficiency and costs.

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How to Make Rivets Waterproof?

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In some special cases, users will require rivets to be waterproof. However, not every type of rivet is waterproof. How to make rivets waterproof? 

I’ll explain “how to make rivet waterproof” by describing the ways in which rivets are waterproof, the types of rivets that are naturally waterproof, and the ways in which rivet waterproofing can be enhanced.

why do rivets need to be waterproof?

Rivets need to be watertight because while they connect structural components, they can also be a potential conduit for liquids, moisture or gases to penetrate the system. If your business requires rivets to be used in applications where sealing, long-term durability, or electronic safety is critical, rivets that are not waterproof can have the following serious consequences:

1. Moisture intrusion inside the equipment

1. Moisture intrusion inside the equipment

Rivet joints that are not tightly sealed can become paths for water vapor penetration, leading to moisture, short-circuiting, or failure of electrical components, control systems, sensors, and so on.

Especially in the structure of electronic control cabinets, outdoor lamps, communication equipment, etc., this small leakage can cause system failure or even safety hazards.

2. Parent material corrosion

Rivet holes that are permeated with water will create a localized humid environment, which may lead to electrochemical corrosion of the parent material over time, especially when the combination of aluminum plate + steel nails is at a higher risk.

Corrosion further expansion, can damage the strength of the connection, shorten the life of the structure.

3. Failure to meet the product IP protection level

In the design of products that need to meet IP65/IP67 dustproof and waterproof rating, rivets as the openings of the shell, if not sealed, will directly lead to the failure of the certification of the whole machine.

The combination of sealed rivets + sealing gaskets is one of the standard ways of IP rating structure design.

4. Entry of water vapor into insulation or thermal barriers

In applications such as refrigeration, HVAC, building curtain walls, etc., water seepage may damage the structure of the insulation layer, reduce the efficiency of energy saving, and harbor mold and mildew.

4. Entry of water vapor into insulation or thermal barriers

several ways in which rivets create a waterproof effect

Rivets achieve a watertight effect and are usually realized in several ways. Below are a few of the main ways that rivets create a waterproof effect:

Rivet waterproofing does not depend on a single factor, but rather a combination of four elements: “structure + sealing + materials + installation”. Depending on the environment, one or more of these elements should be used to achieve truly effective waterproofing.

Waterproof Rivet Best Practices:  Sealed Rivet + Sealing Washer + Sealant + Corrosion Resistant Material

several ways in which rivets create a waterproof effect

are some types of rivets naturally waterproof?

Among the types of rivets, there do exist rivets that are inherently waterproof. These rivets are naturally designed and selected to prevent the penetration of liquids, gases or water vapor, and can achieve basic waterproofing without the need for additional sealing treatments. Typical types are listed below:

Rivmate Aluminum Sealed Type Blind Pop Rivet
Closed End Blind Rivets
Rivmate exploding Watertight Bulb Tite Rivet
Bulb Tite Blind Rivets
What are monobolt rivets
Structural Interlock Rivets

1. Closed-End Blind Rivets

Structural features: the end is closed metal bottom, the core rod will not penetrate or loose, eliminating the through-hole leakage path.

Scope of application: outdoor equipment, electrical boxes, waterproof light housings, machinery shells.

Waterproof ability: with structural grade waterproof ability, suitable for low and medium pressure water vapor environment.

✅ Conclusion: It is the most commonly used and representative self-waterproofing rivets.

2. Structural Interlock Rivets

Structural features: mandrel and rivet body form an internal lock, residual no gap, tail expansion structure fit strong.

Advantages: high strength + anti-loosening + high tightness.

Scope of application: vehicles, outdoor boxes, mechanical frames and other load-bearing + sealing and heavy structure.

✅ Conclusion: Although not designed for waterproof, its locking structure has high waterproof stability.

3. waterproof bulb tite blind rivets

Structural features: Rivet cap edge embedded rubber sealing ring, or the whole package of rubber encapsulation.

Scope of application: high protection level IP67 above the electronic shell, outdoor equipment.

Advantage: factory that is waterproof design, installation that is sealed.

✅ Conclusion: special custom rivets, suitable for high-volume standardized use, reduce construction complexity.

Which coatings enhance the water resistance of rivets？

Among the measures to enhance the water resistance of rivets, the choice of surface coatings is one of the key factors. They not only affect whether the structure is resistant to water and corrosion, but also determine the durability of the joint’s seal in wet and hot, high salt and high pressure environments. The following are the material and coating combinations that best enhance the water resistance of rivets:

  1. Anodizing – For Aluminum Rivets
  2. Zinc Plating- for carbon steel rivets
  3. Passivation
  4. Epoxy Coating or PVDF Coating
  5. Nickel / Tin Plating

Recommended Material & Coating Combinations for Waterproof Rivets

Material/Coating CombinationWaterproof PerformanceRecommended Application Scenarios
Stainless Steel + Passivation★★★★★Outdoor equipment, electrical enclosures, marine hardware
Aluminum Alloy + Anodizing★★★★☆Curtain walls, HVAC systems, traffic signage
Carbon Steel + Zinc Plating + Butyl Washer★★★☆☆General industrial use, piping systems, control cabinets
Copper/Brass + Nickel Plating★★★★☆Moisture-resistant electronics, grounding terminals, PCBs

should you use sealants or washers with rivets for waterproofing?

The use of sealants or sealing gaskets in waterproofing applications can significantly improve the overall waterproofing of a rivet. While some rivet types (e.g. closed end rivets) are inherently watertight, the rivet construction alone is often not sufficient to ensure a consistent seal over time in variable or extreme environments.

Advantages of using sealants or gaskets

Advantages of using sealants or gaskets

1. Seal microgaps to improve seal integrity

  • There are often micro-seams or uneven surfaces between the rivet cap rim and the parent material;
  • Rubber or silicone gaskets flexibly fill gaps and prevent water vapor penetration;
  • Sealants can penetrate deep into hairline gaps to form a complete sealing film.

2. Resistance to thermal expansion and contraction and vibration stresses

  • Prolonged exposure to the outdoors or temperature differences, thermal expansion and contraction of materials can lead to loosening or cracking of the sealing structure;
  • Sealing gasket and elastic gel can absorb the stress changes and keep the joint sealing without deformation.

3. Enhanced weathering and corrosion resistance

  • Sealant can isolate moisture, salt spray, oil and other corrosive media;
  • Prevent the rivets or parent material orifice due to corrosion to form leakage points.

4. Meet higher IP protection level requirements

  • In high protection class designs such as IP65/IP66/IP67, the rivet body alone is often not sufficient;
  • The addition of gaskets and sealants is necessary to pass the protection level test.
Rivmate Waterproof Bulb Tite Rivets

Sealants and sealing gaskets are not “optional”, but are key components in a watertight design to ensure reliability and durability. Sealing accessories are recommended as standard for any riveted connection in electrical, outdoor, or wet environments.

What standards apply to waterproof rivet construction?

IP protection rating standard (Ingress Protection Rating, IEC 60529)

Scope of application: electronics, electrical cabinet, industrial housing, control panel

Role of rivets: as a structural connection must meet the protection rating of the overall housing

Common target ratings:

  • IP65: dustproof + resistant to low pressure water jets
  • IP66: dustproof + resistant to strong water jets
  • IP67: Dust protection + short-term immersion (water depth 1m, 30 minutes)
  • IP68: Dustproof + Long-term underwater operation (according to customer specifications)

🔧 Note: Closed end rivets + sealing washers + sealant are typical configurations to achieve IP65/67.

Wholesale Waterproof rivets from Rivmate

If you are looking for reliable waterproof rivets for your project or business, then you can rest assured that you can talk to Rivmate.

Rivmate – Leading Rivet Manufacturer and Supplier in the World.

Whether it’s closed end blind rivets, waterproof bulb tite blind rivets or structural interlock blind rivets, you can get any size waterproof rivets at Rivmate.

Get rivet samples for waterproof testing today.

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Rivmate Aluminum Sealed Type Blind Pop Rivet

Are closed end rivets waterproof? I’m sure everyone who uses closed end rivets will want to dive into this. This blog will explain the question “are closed end rivets waterproof” from the structure of closed end rivets, waterproof match and waterproof principle.

Table of Contents

What are closed end rivets？

Closed End Blind Rivets (Sealed Type Blind Rivets) are a type of blind rivet specifically designed to provide sealing performance. It is structurally improved on the basis of the traditional open end rivets, and is characterized by the closed end of the rivet body (i.e., the “closed end”), forming a sealed cavity structure. This structure can effectively prevent moisture, gas, dust, etc. through the rivet hole penetration after riveting is completed, widely used in the sealing, corrosion resistance requirements of the scene.

Structural features:

  • Closed type rivet shell: the end of the solid seal design, after riveting, the mandrel remains in the rivet body but does not penetrate the bottom of the shell. Eliminate the “center channel” leakage problem that exists with open end rivets.
  • Automatic locking of the mandrel: the mandrel is mechanically locked after pulling off, which enhances the structural strength and ensures that it will not fall off or come loose.
  • Blind Side: Still has the advantages of blind rivets for one side assembly, suitable for closed structures where the back side is not accessible.
Do Pop Rivets Leak? - The Comprehensive Guide-Rivmate Aluminum Closed Blind Pop Rivet

how do they differ from open end rivets

Comparison CriteriaClosed End RivetsOpen End Rivets
Tail StructureFully sealed tail prevents fluid or gas ingressOpen tail allows mandrel access; no sealing capability
Sealing Performance✅ Excellent sealing against water, dust, oil❌ No sealing; prone to leakage
Mandrel RetentionMandrel is fully locked inside the rivet bodyMandrel may partially remain or become loose
Suitable EnvironmentsMoist, corrosive, or sealed applications (e.g., enclosures, marine use)General-purpose, non-sealed industrial applications
Structural StrengthSlightly higher; mandrel lock enhances tensile strengthStandard strength; suitable for light to medium-duty connections
Material CombinationsTypically aluminum/steel, stainless/stainless (for corrosion resistance)Broad use of materials like aluminum, steel, stainless steel
Manufacturing CostSlightly higher due to more complex structureLower cost, high production efficiency
Typical ApplicationsElectrical cabinets, marine components, outdoor equipment, food machinerySheet metal, furniture, general light-duty assembly

Are closed end blind rivets truly waterproof?

Why are Closed End Blind Rivets “waterproof”?

#1 Structure determines the sealing
Closed end rivets are solid sealing structure, avoiding such as open end rivets through the channel, to prevent water vapor from the core stem through the hole into.

#2 Mandrel locking, no shedding gap
Rivet mandrel breakage is tightly locked in the rivet body, will not form due to the release of the mandrel caused by the “capillary gap”, to enhance the stability of the seal.

#3 Close-fitting expansion tails form a ring-shaped clamp
The tails during the expansion process are closely fitted to the base material, which helps to form a ring-shaped water-blocking structure, especially suitable for sheet metal butt joints.

But note: waterproof performance ≠ absolute sealing

Even for closed type rivets, their intrinsic sealing is structural and is not a complete substitute for specialized seals. The following points may affect its actual waterproof effect:

  • Too large or burr holes → may lead to micro-leakage
  • deformation of the base material or installation angle is skewed → the tail expansion is not tightly fitted
  • Failure to add sealing gasket → unable to shield the small gap between the rivet cap edge and the material
  • Prolonged exposure to high pressure water or corrosive environments → increased risk of leakage

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How does the closed-end design contribute to waterproofing?

Closed end design is the core of closed end blind rivets to realize waterproof function. This design structurally eliminates the “liquid channel” that is common with traditional open end rivets, providing an important guarantee of waterproof performance. The main functions of the enclosed design in terms of waterproofing are as follows:

1. Blocking the path of liquid penetration from the mandrel channel

Open end type rivets are open, the residual channel after the breakage of the mandrel is easy to become the infiltration point of water vapor, dust, oil mist.

Closed type rivet tail is completely sealed metal bottom, after riveting is completed, the mandrel can not penetrate the entire rivet body, can effectively block the possibility of water vapor into the back.

2. Formation of a stable sealed chamber structure

The rivet mandrel is pulled off and stuck inside the closed chamber and locked by the jaw structure, forming a closed metal chamber.

The tail of the rivet expands into an “umbrella” structure, forming an annular fit with the base material.

3. Avoiding micro-gap leakage caused by a loose mandrel

Under prolonged vibration or thermal expansion and contraction, open end rivets may loosen the mandrel and form hairline gaps, which are a high risk for moisture infiltration.

Closed end rivets have a mandrel that is locked in a closed housing, eliminating the risk of a “hollow core”.

4. Enhanced corrosion and airtight protection

  • In high humidity and salt spray environments, water vapor infiltration can lead to internal oxidative corrosion.
  • The sealing design physically isolates the core rod and parent material from outside moisture.
Do Pop Rivets Leak?Aluminum Closed Blind Pop RivetAdditional Waterproofing Measures

Do closed end rivets provide a full seal against water, moisture, and air?

Due to the unique structural design of CLOSED END BLIND RIVETS, closed end blind rivets offer the following basic sealing performance:

  • Excellent waterproof performance in most static, light spray, low-pressure wet zone use scenarios.
  • Good sealing for water vapor, moisture and other microparticles.
  • Stops rapid air leakage

However, if it is used in high-pressure water environment, high airtightness or electronic sealed compartments, it is recommended to cooperate with sealing gaskets or special sealant to enhance the overall sealing level.

What materials and coatings improve the waterproof performance of closed end rivets?

How you need to use Closed-End Blind Rivets in applications where waterproofing performance is critical, then you need to choose the right material with a surface coating treatment. The right extras can enhance their waterproof, corrosion-resistant and long-term sealing performance. Here are some measures to enhance the waterproofing of closed rivets:

  • Uses Stainless Steel 304/316 raw material.
  • Anodizing – For Aluminum
  • Zinc Plating – for steel parts
  • Passivation of stainless steel body surfaces.
  • Epoxy or PVDF coating (for aluminum, stainless steel)
  • For use with rubber gaskets
Rivmate Aluminum Sealed Type Blind Pop Rivet

If you want to improve the waterproof performance of closed type rivets, preferred stainless steel body + passivated or anodized material combination, and in high humidity or outdoor environments with gaskets or sealants, can greatly improve the service life and sealing stability.

If you have specific application environments (e.g. IP rating, humidity and salt spray testing, contact materials), Rivmate can help you recommend a more accurate material + coating combination program.

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What are the common failure risks when using closed end rivets in waterproof applications?

While the waterproofing properties of closed type rivets are excellent, improper installation, poor material selection or inadequate environmental controls can still lead to seal failure or structural damage.

Common Failure Risks of Sealed Rivets in Waterproofing Applications

  1. Mismatch of punched hole size (too large or too small). Rivet fails to form a tight fit with the parent material, resulting in micro-seam water penetration.
  2. Insufficient installation angle or clamping force. Asymmetric rivet expansion, resulting in gaps between the tail and the base material.
  3. Failure to use a sealing washer or sealant. Moisture penetration between the rivet head and the contact surface of the base material.
  4. Material incompatibility leading to galvanic corrosion. The potential difference between the base material and the rivet material is so large that prolonged contact leads to corrosion perforation and the formation of a leakage path.
  5. Mandrel not completely broken or loose. Gaps or channels exist inside the rivet, reducing the sealing effect.
  6. The parent material itself is deformed or warped. Localized inability to fit the end of the rivet, resulting in ring seal failure.
  7. The use environment exceeds the material’s ability to resist corrosion. The surface of the rivet is corroded and perforated, destroying the seal structure.
What are the Typical Manifestations of Shear Failure of Rivets

FAQs about Closed End Rivets

1. Can closed end rivets be used in marine or outdoor environments?

Closed end rivets can be used in marine or outdoor environments, provided the material and sealing are suitable for the environment.

The closed construction prevents water, moisture and corrosive substances from penetrating through the rivet channel. If used in marine environments, it is recommended to use a stainless steel rivet body + stainless steel mandrel combination, or a special anti-corrosion coated model with a waterproof gasket or sealant to cope with the harsh conditions of high salt spray and corrosion.

2. Are closed end rivets suitable for sealing electrical enclosures or watertight panels?

Closed end rivets are ideal for sealing electrical enclosures or waterproof panels.

The closed end structure prevents water, moisture and dust from penetrating through the rivet, making it suitable for use in assembly environments where waterproofing, dustproofing and corrosion protection are required. Used in conjunction with rubber gaskets or sealants, they can be further upgraded to meet industrial sealing standards such as IP65/IP67, making them an ideal fastening solution for electrical control boxes, waterproof cabinets and outdoor equipment panels.

3. Do you need additional washers or sealants to ensure full waterproofing?

Yes, to ensure complete waterproofing, it is recommended that closed end rivets be used in conjunction with an additional gasket or sealant.

While closed end rivets provide a good structural seal on their own, small gaps may exist between the rivet cap edge and the parent material. The use of auxiliary materials such as rubber or silicone gaskets, butyl sealants, etc., can effectively seal the contact surface and prevent moisture from seeping in around the rivet, ensuring that a higher level of water resistance is achieved.

Custom Waterproof Rivets Solutions for your Business

If your application or your customer’s usage scenario requires prolonged exposure to water or water vapor, then you must use waterproof rivets. But poor quality waterproof rivets are difficult to realize satisfactory waterproof effect. Therefore, it is vital for you to find a reliable rivet manufacturer.

Rivmate is a leading rivet manufacturer in China with more than 20 years of experience in rivet production. Currently, Rivmate has been supplying high quality rivets to major global rivet brands. If you want to customize your waterproof rivet solution, please contact our engineers.

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