Functional plating from solutions containing trivalent chromium

Details Functional plating from solutions containing trivalent chromium Functional plating from solutions containing trivalent chromium

1992-10-13

1994-03-15

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly single metal coating

205290, 205243, 106 125, C25D 306, C25D 356

Patent

active

052943267

ABSTRACT:
Functional chromium and chromium-alloy deposits are obtained from an electroplating solution having substantially the composition: 22 g/l Cr.sup.+3 ; 250 g/l KCl; 63 g/l H.sub.3 BO.sub.3 ; 30 g/l HCO.sub.2.sup.= ; 15 g/lKBr; and 120 ppm of a wetting agent. The plating solution provides improved efficiency, stress values and appearance over the prior art, and is tolerant of metallic iron and ionic iron and ammonium.

REFERENCES:
patent: 3954574 (1976-05-01), Gyllenspetz et al.
patent: 4054494 (1977-10-01), Gyllenspetz et al.
patent: 4062737 (1977-12-01), Barclay et al.
patent: 4093521 (1978-06-01), Renton et al.
patent: 4278512 (1981-07-01), Barclay et al.
patent: 4612091 (1986-09-01), Benaben et al.

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