Cadmium plating baths and methods for electrodepositing bright c

Details Cadmium plating baths and methods for electrodepositing bright c Cadmium plating baths and methods for electrodepositing bright c

1979-12-21

1981-06-02

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204DIG2, C25D 326

Patent

active

042709890

ABSTRACT:
Cadmium electroplating baths are described which contain at least one phosphate, carboxylate, sulfonate or sulfate compound containing one or more alkylene oxide groups containing 2 or 3 carbon atoms and wherein at least one of the alkylene oxide groups in the sulfates is attached to an aryl group. The baths also can contain at least one organic brightener compound and particularly pyridine brightener compounds having the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen, alkyl, alkoxy, alkene, mercapto, amino, halogen, aryl, arylalkyl, aminoalkyl, hydroxy, hydroxyalkyl, cyano, dialkylamide, aldoxime, benzo (b), pyrrolidinyl groups and the corresponding N-oxide compounds. Semi-bright to bright level cadmium coatings are obtained with these baths.

REFERENCES:
patent: 2389181 (1945-11-01), Brown
patent: 3787296 (1974-01-01), Hyashida et al.
patent: 4075066 (1978-02-01), Eckles et al.

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