Composition for forming zinc phosphate coating over metal surfac

Details Composition for forming zinc phosphate coating over metal surfac Composition for forming zinc phosphate coating over metal surfac

1980-05-01

1982-01-19

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 315, 204181R, 204181C, C23F 708

Patent

active

043115357

ABSTRACT:
An acidic aqueous zinc-containing coating solution containing about 0.08 to about 0.2 weight percent of zinc, about 0.8 to about 3 weight percent of phosphate, about 0.05 to about 0.35 weight percent of chlorate, about 0.001 to about 0.1 weight percent of nitrite, and a complex fluoride ion having the following concentration:

REFERENCES:
patent: 3333988 (1967-08-01), Douty et al.
patent: 3676224 (1972-07-01), Snee
patent: 3850700 (1974-11-01), Heller
patent: 4265677 (1981-05-01), Muller et al.

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