Process and composition for conversion coating metal surfaces

Details Process and composition for conversion coating metal surfaces Process and composition for conversion coating metal surfaces

C - Chemistry, Metallurgy

23

C

148/20

C23C 22/60 (2006.01)

Patent

CA 1284762

ABSTRACT OF THE DISCLOSURE An improved composition and process for forming a corrosion- resistant complex oxide coating on a zinc or zinc alloy surface incorporates in an aqueous alkaline composition of pH value greater than 11 at least three complexed polyvalent metals, one of which is trivalent chromium.

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