doiSerbia

The influence of cupric ions on shape of potentiodynamic curves obtained on 18 K gold

Rajčić-Vujasinović Mirjana (Technical Faculty in Bor, Bor, Yugoslavia)
Trujić V. (Copper Institute, Bor, Yugoslavia)
Stević Zoran (Technical Faculty in Bor, Bor, Yugoslavia)
Šaćirbegović S. (Novkabel, Novi Sad, Yugoslavia)

The shape of potentiodynamic curves depends mainly on the composition of investigated alloys, but also on the electrolyte used in experiments. In this work investigation were performed for pure gold, and pure silver and copper as alloying metals, then for binary alloys Au-Ag and Au-Cu containing gold as in 18 k gold (i.e. 75 % Au) and Ag-Cu with mass ratio 1:1 and, finally, for three component 18 k gold. It was established a catalytic effect of cupric ions present in electrolyte on oxidation of gold and 18 k gold alloys.

Keywords: 18k Gold, Alloy, Potentiodynamic method, Cupric ions