Performance-Based Selection of the Cathode Material for the Electrodeposition-Redox Replacement Process of Gold Recovery from Chloride Solutions

Abstract Recently, an emerging electrodeposition-redox replacement (EDRR) method was demonstrated to provide exceptionally efficient gold recovery from cyanide-free hydrometallurgical solutions. However, the effect of electrode material and its corrosion resistance in this process overlooked, even though EDRR is carried out extremely corrosive, acidic chloride solution that also contains significant amounts strong oxidants, i.e. , cupric ions. In current study, nickel alloy C-2000, stainless steels 316L 654SMO, grade 2 titanium were for first time critically evaluated as potential cathode materials EDRR. The particular emphasis placed on better understanding substrate overall efficiency process. use a multiple attribute decision-making selection allowed reaching well-founded compromise between properties electrodes extraction. 654SMO steel outstanding performance among examined materials, it enabled 28.1 pct after 3000 cycles, while rate (CR) only 0.02 mm/year.