Electrochemical Oxidation of a Heavy Tungsten-Containing VNZh-Type Alloy and Its Components in Ammonia–Alkali Electrolytes

Abstract

Linear voltammetry in the potentiodynamic mode is used to study the electrochemical behavior of a heavy tungsten-containing VNZh alloy (in wt %: 90 W, 7 Ni, 3 Fe) and its components in ammonia–alkali electrolytes. The anodic oxidation of individual tungsten and nickel is found to be activated when NH₄OH is introduced into the composition of an alkaline electrolyte. Galvanostatic electrolysis is used to perform electrochemical processing of a VNZh-type alloy with a current efficiency of about 100% for tungsten and a specific energy consumption of ~1.5 kW h/kg.