Electrocoating bath for gold alloys - using auric cyanide complex and alloy salt of alkyl:sulphonic or hydroxy:alkyl:sulphonic acid

摘要

Electrolytic bath for pptg. Au alloy coatings in which the Au as Au3+ cyanide complex and the other alloying elements as salts of alkylsulphonic or hydroxyalkylsulphonic acid are present in the bath. The acid salts have a carbon chain of 1-6 atoms. The bath also contains alkylsuphonic or hydroxylalkyl-sulphonic acid. ADVANTAGE - The gold and other alloying elements are present as esp. stable complex ions in a strong acid soln