Abstract:Based on sulfuric acid leaching solution of spent synthetic diamond catalyst, the DC static electrolytic deposition of Fe-Ni alloy was carried out under 1 200 C constant charge by using L16(45) orthogonal experimental scheme. Effects of process parameters on electrodeposition current efficiency, nickel mass fraction and partial current density of Ni and Fe precipitation were studied, and the optimal process parameters were obtained by taking current efficiency as the main index. The results show that the order of influencing factors on current efficiency is pH value > current density > temperature > saccharin sodium concentration > thiourea concentration. The optimum process parameters include average current density of 500 A/m2, temperature of 45 ℃, pH value of 3.55, sodium saccharin concentration of 3 g/L, and thiourea concentration of 0.15 g/L. The results of optimal conditions verify the reliability of orthogonal test result.