| abstract |
An aqueous bath for electroplating a gold/silver alloy includes a water soluble electrolyte such as potassium pyrophosphate, gold and silver present as their respective alkali metal cyanides, and a water soluble brightener system. The water soluble brightener system comprises a selenium compound containing selenium in the -2 valance state and a polyethyleneimine compound. The bath has a pH of about 8 to 10 and may include tetraethanolamine borate ester to decrease the tensile stress of the electrodeposit. |