Treatment for galvanized metal

Details Treatment for galvanized metal Treatment for galvanized metal

C - Chemistry, Metallurgy

23

C

C23C 22/34 (2006.01)

Patent

CA 2109057

ABSTRACT OF THE DISCLOSURE An aqueous coating solution for zinc containing metals such as galvanized iron and steel. The coating solution is resistent to the formation of zinc induced sludge and can be operated with little or no overflow. The aqueous treatment solution contains from 0.1 to 10 grams per liter of a fluoro- metallic acid, from 0.015 to 6 grams per liter of a salt of a transition metal, from 1 to 30 grams per liter zinc; and optionally from 0.1 to 3 grams per liter a polymer of acrylic acid, methacrylic acid, or an ester thereof with a C1 to C8 alkanol.

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