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SUBSTITUTING CADMIUM CYANIDE ELECTROPLATING WITH ZINC CHLORIDE ELECTROPLATING
Citation:
Kim, B., P. Webb, J. Gurklis, AND R. Smith. SUBSTITUTING CADMIUM CYANIDE ELECTROPLATING WITH ZINC CHLORIDE ELECTROPLATING. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-94/074 (NTIS PB94165321), 1994.
Description:
The environmental and economic implications of substituting zinc chloride electroplating for cadmium cyanide electroplating were evaluated. he process substitution was successful in achieving product quality to satisfy the customer requirements for corrosion resistance. orrosion resistance was determined by salt-spray tests in accordance with the ASTM Method B117-90. he process substitution also eliminated cadmium and cyanide from the wastes and chlorine from the wastewater treatment process, thereby greatly reducing hazards to plant personnel and pollution of the environment. he process substitution also reduced oil and grease waste. n the negative side, however, the process change increased the generation of wastewater, wastewater treatment sludge, and chromium. or a new installation, the zinc-plating process offers an economic advantage of slightly lower operation cost over the cadmium-plating process.
