ELECTROLYTE FOR THE ELECTROCHEMICAL DEPOSITION OF GOLD ALLOYS AND PROCESS FOR THE PRODUCTION THEREOF

摘要

The present invention relates to cyanide-free electrolytes for the electrochemical deposition of binary and polynary alloys of gold, which contain an alkaline solution of anionic thiolate complexes of gold and metals which form alloys with gold. These electrolytes can be produced in a simple, environmentally friendly and economical way from commercially available aqueous solutions of sulphite complexes of gold and a number of salts of the corresponding alloy-forming metals, by addition of the thiols and setting of an alkaline pH of the electrolytic bath. The electrolytes display long-term stability and can be used for the electrochemical deposition of gold alloys. The present invention likewise relates to a process for producing the electrolytes mentioned.