Electrolyte solution and process for gold electroplating

Details Electrolyte solution and process for gold electroplating Electrolyte solution and process for gold electroplating

1987-06-01

1989-01-03

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 362

Patent

active

047955341

ABSTRACT:
A bath for producing deposits of gold by electrodeposition, comprising: an aqueous solution containing at least one soluble gold cyanide compound; formic acid in a concentration of at least 20 ml/l to about 150 ml/l of said bath solution, said formic acid concentrations being calculated on a 90% by weight grade of formic acid; a cobalt compound; sufficient alkali to bring the pH to within the range of 3.5 to 4.4; and as conductivity salts and inhibitors, malic acid or a combination thereof with gluconic acid or with a water soluble organophosphorus chelating agent, said conductivity salts and inhibitors being present in at least sufficient quantity to provide a specific gravity of at least 13 Baume' in said bath.

REFERENCES:
patent: 4591415 (1986-05-01), Whitlaw
patent: 4670107 (1987-06-01), Lochet

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