Conversion coatings for zinc and cadmium surfaces

Details Conversion coatings for zinc and cadmium surfaces Conversion coatings for zinc and cadmium surfaces

1981-03-02

1982-09-28

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 617, C23F 708

Patent

active

043516750

ABSTRACT:
An aqueous acidic coating solution for treating zinc, zinc alloy or cadmium surface comprising (A) an oxidizing agent selected from the group consisting of hydrogen peroxide, nitrate ion, nitrite ion, halate ion or mixtures thereof, and (B) a compound having the formula ##STR1## wherein R is hydrogen or an alkyl group of from 1 to 4 carbon atoms.

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patent: 4171231 (1979-10-01), Bishop et al.
patent: 4222779 (1980-09-01), Bengali et al.
patent: 4225350 (1980-09-01), Allan
patent: 4225351 (1980-09-01), Zuendt
patent: 4229268 (1980-10-01), Lowery et al.

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