Controlling Carbonate Buildup in Alkaline and Cyanide-based Plating Solutions through Continuous On-line Crystallization

摘要

Excessive carbonate concentration in alkaline and cyanide plating solutions through cyanide hydrolysis and anodic oxidation adversely affects plating efficiency. The conventional practice of controlling carbonates within acceptable limits was to batch treat these plating solutions by pumping them either into separate chiller tanks or into vessels placed outside of the plating shop during the winter. This paper takes a look at some of the previously accepted practices and compares crystallization with other alternatives.