镍-钨-碳化钨复合电极在盐酸介质中的阳极极化行为的研究

Studies on the Anodic Behavior of Nickel-Tungsten-Tungsten Carbide Composite Electrode in Hydrochloric Acid Solutions

复合电极发展迅速，应用广泛。为节约资源，回收废弃复合镀层中的金属元素，以镍－ 钨－ 碳化钨复合镀层为例，采用复合电沉积法制得镍－ 钨－ 碳化钨复合电极。研究了碳化钨微粒的共沉积量、温度及盐酸浓度对镍－ 钨－ 碳化钨复合电极在盐酸溶液中的阳极极化行为的影响，分析了阳极钝化的原因并确定了采用电化学溶解法回收镍－ 钨－ 碳化钨复合电极中的镍的工艺条件。

Composite electroplating is developing rapidly which has been widely used in industries. In view of the squandered metal in composite electrodeposits, for example, the squandered nickel in nickel-tungsten-tungsten carbide composite electrodeposits. Herein, nickel-tungsten-tungsten carbide composite electrode was prepared. The effect of the amount of codeposited tungsten carbide particles, temperature and concentration of hydrochloric acid on the anodic behavior of nickel-tungsten-tungsten carbide composite electrode in hydrochloric acid solutions was studied. The reason which caused anodic polarization of nickel-tungsten-tungsten carbide composite electrode was investigated, and operating conditions of recovering the squandered nickel in nickel-tungsten-tungsten carbide comoposite electrode have been optimized.