Zinc-Nickel and Specification for Automotive Industry

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Normal zinc electroplate plays an important corrosion-protection role that will certainly never be completely eliminated, but nickel performs better in certain critical applications because it becomes slightly more noble than zinc, thus slowing the corrosion rate. In addition, Zinc-Nickel coated parts can withstand the formation of white rust for up to 500 hours, and up to 1,000 hours for red rust.

Zinc-Nickel electroplating can be produced from acid or alkali solutions, the most popular now becoming the alkali as it is easier to control, is more ductile, gives a more consistent alloy and more even thickness than the acid solution. Generally, the standard Zinc-Nickel coating thickness rangesfrom 5 micron to 25 micron. The alkaline solution gives nickel content of 10-15%.

It has been shown that this range of concentrated nickel gives good corrosion performance and it is suitable for parts that are formed or crimped after plating. However, high nickel content, which contains more than 15% of nickel, is applied in specific applications that require the highest corrosion resistance.

A Sample of Zinc-Nickel Specifications:

  • ASTM : B 841
  • BMW : GS90010
  • Bosch : 0 204 Y82 533
  • Bosch : 0 204 Y82 533
  • Chrysler : PS-1207
  • Chrysler : PS-8955
  • Delphi : DX551300
  • Ford : WSF-M1P87
  • GM : GMW4700
  • Honda : HES D2003
  • JIS : Ep-Fe/ZnNi
  • Nissan : M 4060
  • Toyota : TSH6530G
  • Volkswagen : VW 137501