Metal plating iron-containing substrates

Details Metal plating iron-containing substrates Metal plating iron-containing substrates

1984-02-21

1984-11-20

Silverberg, Sam

Coating processes

Immersion or partial immersion

Metal base

204 45R, 204 46G, 204 49, 204 52R, 204 51, 204 47, 106 122, 106 123, 106 124, B05D 118, B22F 700, C25D 346

Patent

active

044838875

ABSTRACT:
An improved plating solution for metal plating iron-containing metallic substrates comprising from about 1 to about 35 weight percent of an aqueous solution containing metal ions to be deposited on the substrate, and from about 65 to about 99 weight percent of an aqueous acidic component having a pH value of less than about 1. The aqueous acidic component is produced by (a) admixing from about 45 to about 85 weight percent hydrochloric acid with from about 20 to about 55 weight percent phosphoric acid in a suitable vessel for an effective period of time to produce a substantially homogeneous acidic mixture; (b) admixing the homogeneous acidic mixture with an effective amount of water to provide an aqueous acidic mixture; and (c) admixing from about 2 to about 20 weight percent of a hydroxy carboxylic acid and from about 0 to about 20 weight percent of a dicarboxylic acid with the aqueous acidic mixture.

REFERENCES:
patent: 3607352 (1968-11-01), Fedgen
patent: 4374876 (1983-02-01), Shazly

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