Treatment of zinc surfaces to form a zinc phosphate coating

Details Treatment of zinc surfaces to form a zinc phosphate coating Treatment of zinc surfaces to form a zinc phosphate coating

1977-09-26

1979-03-06

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 615Z, C23F 712

Patent

active

041429176

ABSTRACT:
An improved process for forming a zinc phosphate coating on a zinc surface comprises contacting the surface with an aqueous nitrate and ammonia-free solution containing zinc, phosphate, nickel or cobalt, and hydrogen peroxide.

REFERENCES:
patent: 2591479 (1952-04-01), Ward
patent: 3282744 (1966-11-01), Goldsmith
patent: 3676224 (1972-07-01), Snee

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