The coating involves the co-electrodeposition of Zinc and Nickel to a component. By doing so, this increases the sacrificial protection to the under lying iron or steel. The addition of 12-15% by weight of Nickel dramatically improves the performance of a Zinc Nickel finish over the more common Zinc or Zinc Iron systems.
Standards for zinc-nickel plating typically require un-passivated parts coated with 10µm of zinc-nickel to withstand 500 hours or more of neutral salt spray testing before red corrosion. With the inclusion of various top coats and sealers, corrosion resistance levels can greatly be improved, reaching performance levels well in excess 1000 hours of neutral salt spray.