DEZINCIFICATION OF GALVANIZED STEEL SCRAP BY ELECTROLYZING

To remove and retrieve Zn from galvanized scrap by electrolyzing with caustic solution is experimentally confirmed to be a reasonable approa ch and the galvanized scrap can be completely purified. The concentrat ions of NaOH and ZnO, and the temperature of electrolyte are important factors to influence the critical current density of passivation of Z n layer. The electrolyzing parameters such as the applied current dens ity, temperature of electrolyte, and the concentrations of NaOH and Zn O are optimized by experiments.