Process for preparing zn-ni-alloy-electroplated steel sheets...

Details Process for preparing zn-ni-alloy-electroplated steel sheets... Process for preparing zn-ni-alloy-electroplated steel sheets...

C - Chemistry, Metallurgy

25

D

204/26.5

C25D 3/56 (2006.01)

Patent

CA 1233429

ABSTRACT OF DISCLOSURE Zn-Ni-alloy electroplating of steel sheets is carried out using a plating bath containing 10 - 40 g/l zinc, 15 - 160 g/l nickel, 0.1 - 5 g/l cobalt and 0.2 - 10 g/l titanium and 0.1 - 5 g/l aluminum or 0.1 - 5 g/l magnesium existing in the form of salts, the pH of which is 1.5 -2.5. The obtained plated product exhibits improved excellent corrosion resistance and corrosion peeling resistance. The product can further be subjected to heating to 60 - 200°C, preferably in hot water; steam, or atomized water mist. This treatment further increases corrosion resistance.

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