Non-chromate conversion coatings

Details Non-chromate conversion coatings Non-chromate conversion coatings

C - Chemistry, Metallurgy

23

G

148/14

C23G 1/02 (2006.01) C23C 22/48 (2006.01) C23C 22/53 (2006.01)

Patent

CA 1134725

RC-1456-ri011 NON-CHROMATE CONVERSION COATINGS ABSTRACT Improved color, brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treat- ment with a non-toxic solution comprised of sulfuric acid, hydro- gen peroxide, a silicate and at least one cationic triarylmethane dye. Certain organophosphorus compound additives further enhance the corrosion resistance.

336961

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