Non-chromate conversion coatings

Compositions: coating or plastic – Coating or plastic compositions – Corrosion inhibiting coating composition

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Details

106 1421, 106 1445, 148 617, 148 624, 148 627, 148 315, 252 794, 252387, 252389A, 428470, C09D 508, C23F 700

Patent

active

042253500

ABSTRACT:
Improved color, brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen peroxide, a silicate and at least one cationic triarylmethane dye. Certain organophosphorus compound additives further enhance the corrosion resistance.

REFERENCES:
patent: 3663441 (1972-05-01), Gulla
patent: 3668131 (1972-06-01), Banush et al.
patent: 4158592 (1979-06-01), Readio et al.

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