Low oxygen overvoltage lead anodes

Details Low oxygen overvoltage lead anodes Low oxygen overvoltage lead anodes

C - Chemistry, Metallurgy

25

C

204/185

C25C 7/02 (2006.01) C25B 11/04 (2006.01)

Patent

CA 1219552

LOW OXYGEN OVERVOLTAGE LEAD ANODES Abstract Anodes made of lead or lead alloys, used for the evolution of oxygen from sulphuric acid solutions, particularly in metal electrowinning processes, are made more catalytic by treating them in an oxidizing bath of hydra-ted mol-ten salts, in particular comprising highly oxidizing persalts or nitrates, of cobalt, iron and nickel. After treatment, the anodes exhibit an extraordinary low oxygen overvoltage and allow a considerable saving of energy in comparison with untreated anodes.

444713

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