AC Electrochemical Oxidation of Nickel and VNZh Alloy in Alkaline-Ammonium Solutions

Abstract It was studied the electrochemical oxidation of nickel in an electrolyte of the composition NaOH 2M + NH4OH 4M by using linear and cyclic voltammetry. A significant increase in the process rate has been revealed due to the cathodic polarization of the electrode under study. It was shown the possibility of heavy tungsten alloy processing, such as VNZh-type alloy (in wt%: 78.8 W, 15.2 Ni, 6.0 Fe), under the influence of alternating electric current of industrial frequency in alkaline-ammonium solutions.