Passivation process and composition for zinc-aluminum alloys

Details Passivation process and composition for zinc-aluminum alloys Passivation process and composition for zinc-aluminum alloys

C - Chemistry, Metallurgy

23

C

148/18

C23C 22/33 (2006.01) C23C 22/38 (2006.01) C23C 22/44 (2006.01)

Patent

CA 1274754

Abstract of the Disclosure An aqueous acidic treating solution and process for forming a chromium-containing passivate coating an the surface of zinc or zinc-aluminum alloys to enhance bare corrosion resistance and inhibit discoloration thereof upon exposure to ambient environments. The treating solution contains as its essential constituents, chromium ions, nitrate ions, phosphate ions.

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