Trivalent chromium plating bath composition and process

Details Trivalent chromium plating bath composition and process Trivalent chromium plating bath composition and process

1978-04-03

1980-01-22

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 43R, C25D 306

Patent

active

041849299

ABSTRACT:
An aqueous acid trivalent chromium electroplating solution and process for forming chromium platings employing a bath containing trivalent chromium, formate ions as a complexing agent, and a bath soluble reducing agent selected from the group consisting of formaldehyde, glyoxal, formaldehye bisulfite, glyoxal di-bisulfite, sodium formaldehyde sulfoxylate, and mixtures thereof. The bath may additionally and preferably contain controlled amounts of conductivity salts, ammonium cations and a buffering agent to maintain the pH within the desired range.

REFERENCES:
patent: 3772167 (1973-11-01), Bharucha et al.
patent: 3963527 (1976-06-01), Lindemann
patent: 4107004 (1978-08-01), Ward et al.
H. Koretzky, IBM Tech. Disclosure Bulletin, p. 1634, vol. 9, No. 11, Apr. 1967.

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