Process for improving corrosion resistance of zinc or cadmium pl

Details Process for improving corrosion resistance of zinc or cadmium pl Process for improving corrosion resistance of zinc or cadmium pl

1985-10-21

1987-04-14

Silverberg, Sam

Metal treatment

Compositions

Heat treating

4273977, 4273978, C23C 2214, C23C 2282

Patent

active

046575995

ABSTRACT:
A process for improving corrosion resistance of a metal article plated with zinc or cadmium includes coating the plated article with a chromium solution to provide the article with a chromate coating having a yellow to olive-drab color, and immersing the chromated article in a silicate solution for a sufficient time to cause the article to assume an acceptable white or grey color and also increase its corrosion resistance.

REFERENCES:
patent: 4462842 (1984-07-01), Uchiyama
patent: 4487815 (1981-12-01), Dorsett

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