Zinc Nickel Fasteners for Automotive and Corrosion-Critical Applications
Zinc-nickel fasteners are designed for applications requiring high corrosion resistance, especially in the automotive aftermarket and industrial environments. Compared with conventional zinc plating, zinc-nickel coating provides significantly longer service life under harsh conditions such as humidity, salt exposure, and temperature fluctuations.
We supply zinc-nickel coated fasteners with stable quality and consistent performance, suitable for demanding applications where standard zinc plating is not sufficient.
Product Range
Our zinc-nickel fastener range includes:
- •Hex bolts (M6 – M16)
- •Flange bolts
- •Hex screws and machine screws
- •Automotive standard fasteners (metric)
Materials: Carbon steel, alloy steel (Grade 8.8 / 10.9 / 12.9)
For applications requiring integrated flange design, please refer to our zinc-nickel flange bolts.
Why Zinc-Nickel Coating?
Zinc-nickel coating typically contains 12–15% nickel, which significantly improves corrosion protection compared to traditional zinc coatings.
Key advantages:
- •Salt spray resistance: 720–1000 hours
- •Better performance in under-hood automotive environments
- •Improved resistance to red rust and white rust
- •Suitable for European automotive standards and requirements
- •RoHS compliant
Zinc Nickel vs Conventional Zinc Plating
| Item | Zinc Plating | Zinc-Nickel Plating |
|---|---|---|
| Corrosion Resistance | Low–Medium | High |
| Salt Spray | 96–240h | 720–1000h |
| Automotive Use | Limited | Highly suitable |
| Cost | Lower | Slightly higher |
| Service Life | Shorter | Longer |
Black Zinc-Nickel Plating Option
Black zinc-nickel plating is available for fasteners used in automotive and industrial applications where both corrosion resistance and appearance are required.
Compared with standard zinc-nickel coatings, black zinc-nickel provides the same high level of corrosion protection while offering a darker, uniform finish that is often preferred for visible or design-sensitive components.
This option is commonly used for automotive aftermarket fasteners, especially for under-hood and exterior applications exposed to moisture and road salt.
How Zinc-Nickel Coatings Protect Fasteners
Zinc-nickel coatings protect fasteners by forming a dense, corrosion-resistant layer that significantly delays both white rust and red rust formation.
Due to the nickel content in the coating, zinc-nickel fasteners offer improved performance in high-humidity, salt-spray, and temperature-fluctuating environments, making them suitable for corrosion-critical applications where conventional zinc plating is not sufficient.
Zinc-Nickel vs Dacromet Coating for Fasteners
Both zinc-nickel coating and Dacromet coating are commonly used for fasteners requiring enhanced corrosion resistance. However, they are suitable for different applications and customer requirements.
Key Differences
| Item | Zinc-Nickel Coating | Dacromet Coating |
|---|---|---|
| Corrosion Resistance | Very high (720–1000h) | High (typically 500–720h) |
| Appearance | Metallic silver / black | Grey, matte finish |
| Electrical Conductivity | Good | Limited |
| Torque Consistency | Stable | May vary |
| Automotive Use | Widely used | Used in specific OEM specs |
| Repair / Rework | Possible | Difficult |
| Cost Level | Medium–High | Medium |
Which Should You Choose?
Zinc-nickel coating is recommended for automotive aftermarket fasteners, applications requiring stable torque performance, or environments with long-term corrosion exposure.
Dacromet coating is typically specified for OEM projects with fixed technical requirements or weight-sensitive applications.
In-House Zinc-Nickel Plating Advantage
Unlike trading companies that rely entirely on external plating suppliers, we offer in-house zinc-nickel plating, allowing us to:
- •Control coating quality and thickness
- •Ensure consistent corrosion performance
- •Shorten lead time
- •Provide stable pricing for long-term cooperation
This makes our zinc-nickel fasteners especially suitable for repeat orders and aftermarket distribution.
Applications
- •Automotive aftermarket
- •Engine and under-hood components
- •Chassis and suspension systems
- •Industrial equipment
- •Corrosion-critical fastening points
Deutsch (Kurzbeschreibung)
Zink-Nickel-beschichtete Verbindungselemente werden häufig in der Automobilindustrie und im industriellen Bereich eingesetzt, insbesondere bei Anwendungen mit hohen Anforderungen an den Korrosionsschutz.
Im Vergleich zur herkömmlichen Verzinkung bietet die Zink-Nickel-Beschichtung eine deutlich höhere Salzsprühbeständigkeit und eine längere Lebensdauer, auch unter anspruchsvollen Umweltbedingungen.
Unsere Zink-Nickel-Schrauben eignen sich für Anwendungen im Motorraum, Fahrwerk sowie für weitere korrosionskritische Befestigungspunkte. Die Beschichtung erfüllt gängige Anforderungen für den europäischen Automobil-Aftermarket.
Customization & Supply
- •OEM & aftermarket supply
- •Standard and custom fasteners
- •Small to medium batch support
- •Stable long-term supply capability
Frequently Asked Questions
What are zinc-nickel fasteners?
Zinc-nickel fasteners are steel fasteners electroplated with a zinc-nickel alloy coating containing 12–15% nickel. This coating provides significantly enhanced corrosion resistance compared to conventional zinc plating, making them suitable for automotive and industrial applications requiring high corrosion protection.
What is the salt spray resistance of zinc-nickel fasteners?
Zinc-nickel fasteners typically achieve 720–1000 hours salt spray resistance, substantially exceeding standard zinc plating (96–240h). Performance depends on coating system and test conditions.
Are zinc-nickel fasteners suitable for automotive applications?
Yes, zinc-nickel fasteners are highly suitable for automotive applications, especially under-hood components, chassis systems, and areas exposed to road salt and moisture. They meet European automotive standards and requirements.
What materials are available for zinc-nickel fasteners?
Zinc-nickel fasteners are available in carbon steel and alloy steel, including Grade 8.8, 10.9, and 12.9. The zinc-nickel coating is applied via electroplating process.
Do you offer in-house zinc-nickel plating?
Yes, we offer in-house zinc-nickel plating, allowing us to control coating quality and thickness, ensure consistent corrosion performance, shorten lead time, and provide stable pricing for long-term cooperation.
Contact Us
If you are looking for zinc-nickel coated fasteners with reliable corrosion resistance for automotive or industrial use, please contact us with your required size, quantity, and application.
We will recommend suitable specifications and provide a competitive quotation.
Product Pages
- Zinc-Nickel Flange Bolts
- Zinc-Nickel Hex Bolts
- Zinc-Nickel Studs
- Zinc-Nickel Nuts
- Zinc-Nickel Custom Fasteners
Related Pages
Engineering & Specification Support
Fastener selection depends on application environment, load requirements, and installation constraints.
For technical drawings, detailed specifications, or application-specific engineering guidance, contact our engineering team.
Für technische Zeichnungen, Spezifikationen oder anwendungsspezifische Anforderungen kontaktieren Sie uns bitte zur Abstimmung.
Technical inquiries are welcome at any time. We typically respond within one business day.