Preparation of PbO{HD 2{B anode

摘要

A method for, and product produced by, electrodeposition of lead dioxide on a substrate anode from electrolyte containing lead nitrate and free nitric acid, wherein the free nitric acid concentration in the electrolyte is maintained at about 90 to about 125 grams per liter, to substantially eliminate the concurrent electrodeposition of lead monoxide onto the substrate. Anodes so produced are useful in electrowinning processes for recovering metals from metal ores.