DEPOSITION OF COPPER-TIN-ZINC ALLOYS FROM AN ELECTROLYTE

摘要

The present invention relates to a cyanide-free, pyrophosphate-containing electrolyte and a process for the electrolytic deposition of a ternary alloy of the elements copper, tin and zinc. The electrolyte and the process are characterized in that not only zinc (II) ions and copper ions but also stannate anions are present in the electrolyte used. The copper and zinc ions are present in a particular molar ratio relative to one another and to the pyrophosphate anions.