Zinc-nickel phosphate conversion coating composition and process

Details Zinc-nickel phosphate conversion coating composition and process Zinc-nickel phosphate conversion coating composition and process

Filed on

1989-09-25

Date issued

1991-03-19

Examiner

Silverberg, Sam

Patent Class

Gas: heating and illuminating

Other Related Categories

148262, C23C 2212

Type

Patent

Status

active

Patent number

050007998

Description

ABSTRACT:
The operation of zinc-nickel phosphate conversion coating of active metals is improved by using phosphating solutions containing formic acid or formate ions. Such solutions can work effectively at low temperatures and provide excellent substrates for paint, particularly that applied by electrodeposition.

REFERENCES:
patent: 4637838 (1987-01-01), Rausch et al.

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