abstract |
Cyanide-free electroplating baths for deposition of gold and gold alloy coatings, using sulphurous gold complexes that are stable for a relatively long time, can be used with current density over 1 A/dm 2 and are practically odor-free, are obtained when the sulphurous compounds used are mercaptosulfonic acids, dye sulfide sulfonic acids or salts thereof. |