Low oxygen overvoltage lead anodes
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United States of America Patent
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Oct 22, 1985
Grant Date -
N/A
app pub date -
Jan 6, 1984
filing date -
Feb 14, 1983
priority date (Note) -
Expired
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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 hydrated molten 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.
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