What is Zinc Flake Coating?
Zinc Flake Coating is a corrosion-resistant coating made from a blend of zinc particles and specialized additives that form a flake-like structure. This coating is applied through a dip-spin or spray process and is known for its superior corrosion protection properties, particularly in harsh environments. Zinc Flake Coating forms a durable, self-healing surface that continues to protect underlying metal even when the surface is scratched or damaged. Unlike traditional zinc plating, Zinc Flake Coating does not require a chromate conversion, making it a more environmentally friendly option. It provides excellent protection against salt spray, moisture, and other corrosive elements, making it ideal for high-performance applications.
Types Of Zinc Flake Coating Works And How It Works
Zinc Flake Coating is a non-electrolytic process where zinc and/or aluminum flakes are suspended in a binder and applied to metal surfaces. The coating forms overlapping platelets, creating a durable barrier that provides both sacrificial (cathodic) and barrier protection against corrosion. This structure ensures long-term performance, even if the coating is scratched, as the flakes continue to shield the substrate
Zince-only Flake Coatings
Standard for general corrosion protection.
Zinc Aluminum Flake Coatings
Enhanced for higher corrosion resistance and specific OEM requirements
Topcoats
Optional layers for added chemical, UV, or color protection, and improved torque/tension properties
Zinc Flake Coating vs. Zinc Plating
| Feature | Zinc Flake Coating | Zinc Plating |
|---|---|---|
| Application | Non-electrolytic | Electrolytic |
| Hydrogen Embrittlement | None | Possible |
| Layer Thickness | Thin, uniform | Thicker, less uniform |
| Corrosion Resistance | Superior | Good, but less durable |
| Environmental Impact | Chromate-free options | May require chromates |
FAQ
Yes, colored topcoats can be added for identification or aesthetic purposes
Zinc flake coating offers better corrosion resistance, avoids hydrogen embrittlement, and is more environmentally friendly compared to traditional zinc plating
Superior corrosion resistance, no hydrogen embrittlement, thin and uniform layer, self-healing properties, and environmental friendliness
The coating is applied using dip-spin, rack dip-spin, or spray methods, followed by heat curing for durability
Application of Zinc Flake Coating
It is used to protect metal parts from corrosion, especially in harsh environments. The coating is self-healing, offering long-term protection against corrosion.
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