Substantially nickel-free phosphate conversion coating...

Details Substantially nickel-free phosphate conversion coating... Substantially nickel-free phosphate conversion coating...

C - Chemistry, Metallurgy

23

C

C23C 22/12 (2006.01) C23C 22/13 (2006.01) C23C 22/18 (2006.01) C23C 22/36 (2006.01)

Patent

CA 2150545

The nickel in conventional low zinc and nickel containing phosphate conversion coating compositions can be replaced by substantially smaller concentrations of cupric ions without losing the benefits of quality that motivated the addition of nickel to low zinc phosphating compositions originally; in fact, better alkaline resistance and paint adhesion can be achieved, along with a substantial cost reduction.

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