Acidic zinc phosphate solution and method

Details Acidic zinc phosphate solution and method Acidic zinc phosphate solution and method

C - Chemistry, Metallurgy

09

K

6/222, 31/47

C09K 3/00 (2006.01) C23C 22/17 (2006.01)

Patent

CA 1101612

~\ ABSTRACT OF THE DISCLOSURE An aqueous acidic oxidant-free zinc phosphate solution contains tartaric acid, citric acid and/or a salt of either. At a pH of about 3.5 to 4.7, the solution produces a micro- crystalline coating of zinc phosphate on iron or steel. The solution preferably contains nickel ion also.

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