Zinc-Nickel Alloy Coatings-A Technical Review of Published Literature
900718
02/01/1990
- Event
- Content
- The process considerations, manufacturability, corrosion properties, paintability, weldability, and formability of nominal 9 to 15 percent electrodeposited zinc-nickel (Zn-Ni) alloy-coated sheet steels for automotive applications were reviewed. Zn-Ni coatings were selected for use in automobile body panels by several automakers because of their ease of manufacturing, forming, and welding. Although Zn-Ni coatings may be easily manufactured into autobody panels without a change in production procedures, these coatings exhibit poor paintability and poor corrosion resistance, and would be risky to expose in the U.S. automotive environment at the specified 20 to 40 g/m2 coating weights. Zn-Ni coatings will not provide the cosmetic corrosion protection of zinc or zinc-iron (Zn-Fe) coatings, particularly on exterior autobody panels in a fully painted condition. Zn-Ni coatings provide barrier-like protection and could find applications in areas where the coatings are exposed either bare or where they receive insufficient primer coats.
- Pages
- 12
- Citation
- Roudabush, L., "Zinc-Nickel Alloy Coatings-A Technical Review of Published Literature," SAE Technical Paper 900718, 1990, https://doi.org/10.4271/900718.