Purification of nickel and cobalt electroplating solutions

Details Purification of nickel and cobalt electroplating solutions Purification of nickel and cobalt electroplating solutions

1973-09-20

1977-10-11

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 48, 210 54, C25D 312, B01D 900

Patent

active

040534006

ABSTRACT:
Zinc, copper and/or iron impurities ordinarily associated with nickel or cobalt electroplating baths can be removed from solution by introducing an amount of a predetermined and selected alkylthiuram sulfide compound into the electroplating bath sufficient to convert the zinc, copper and/or iron impurities into relatively insoluble metal salts. The insoluble salts may then be removed from the bath by passing the treated solution through a standard filtering system.

REFERENCES:
patent: 2406960 (1946-09-01), Neal et al.
patent: 2773022 (1956-12-01), Turner
patent: 3518171 (1970-06-01), Merker et al.
Metal Finishing, p. 43, Nov. 1969.

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