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Dezincification of galvanized steel scrap by electrolyzing
Author(s) -
Ma Zhongting,
Chen Qibing,
Ni Ruiming,
Wei Shoukun
Publication year - 1997
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199701711
Subject(s) - scrap , galvanization , chemistry , electrolyte , passivation , metallurgy , electrolysis , die (integrated circuit) , electrode , materials science , layer (electronics) , nanotechnology , organic chemistry
To remove and retrieve Zn from galvanized scrap by electrolyzing with caustic solution is experimentally confirmed to be a reasonable approach and the galvanized scrap can be completely purified. The concentrations of NaOH and ZnO, and the temperature of electrolyte are important factors to influence the critical current density of passivation of Zn layer. The electrolyzing parameters such as the applied current density, temperature of electrolyte, and the concentrations of NaOH and ZnO are optimized by experiments.