Bright chromium plating baths and process

Details Bright chromium plating baths and process Bright chromium plating baths and process

1981-08-24

1984-09-18

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 310

Patent

active

044722494

ABSTRACT:
The invention provides a hexavalent chromium plating bath containing chromic acid, an iodine releasing compound and/or a bromine releasing compound such as iodate, periodate, bromate or perbromate, and a carboxylate which is stable in the bath. Exemplary stable carboxylates include acetic acid, propionic acid, chloroacetic acid, trichloroacetic acid, succinic acid, sulfoacetic acid, benzoic acid, picolinic acid, and nicotinic acid. Bright chromium deposits can be produced with these baths at high current efficiencies employing high temperatures with substantially no low current density etch.

REFERENCES:
patent: 3248310 (1966-04-01), Schaer
patent: 3654101 (1972-04-01), Aoun
patent: 3706643 (1972-12-01), Huba
patent: 3788957 (1974-01-01), Christie et al.

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