Trivalent chromium electroplating baths

Details Trivalent chromium electroplating baths Trivalent chromium electroplating baths

1982-11-01

1984-05-15

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 306

Patent

active

044486499

ABSTRACT:
A trivalent chromium electroplating solution containing trivalent chromium ions, a complexant, a buffer and a sulphur species selected from sulphites and dithionites, the complexant being selected to impart a stability constant, K.sub.1, to the chromium complex which is in the range 10.sup.6 <K.sub.1 <10.sup.12 M.sup.-1. The chromium ion molar concentration is lower than 0.01M. The complexant is selected from aspartic acid, iminodiacetic acid, nitrilotriacetic acid, 5-sulphosalicylic acid or citric acid.

REFERENCES:
patent: 1922853 (1933-08-01), Leipzig
patent: 4062737 (1977-12-01), Barclay et al.
patent: 4157945 (1979-06-01), Ward et al.
patent: 4161432 (1979-07-01), Barclay et al.
patent: 4256548 (1981-03-01), Barclay et al.
patent: 4278512 (1981-07-01), Barclay et al.
Chemical Abstracts, vol. 94, No. 3, p. 545, 38690d, Feb. 1981.

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