Corrosion and passivation behavior of noble metal coated anodes in copper electrowinning applications |
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| Authors: | D. Wensley I. H. Warren |
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| Affiliation: | (1) Metallurgist, MacMillan Bloedel Research, Vancouver, Canada;(2) Department of Metallurgy, University of British Columbia, Vancouver, Canada |
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| Abstract: | The performance of platinum/iridium coated titanium anodes under electrolytic conditions typical of those encountered in copper electrowinning applications has been studied. The corrosion loss of coating totalled approximately 1.5 μg/A · h during normal operation with a preferential loss of platinum from the coating. Anode potentials were observed to increase with time and the onset of complete electrode degradation was accompanied by a large increase of anode potential together with a loss of coating by spalling. The mechanism of coating loss and anode degradation is discussed. Graduate Student, University of British Columbia, Department of Metallurgy |
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