期刊
HYDROMETALLURGY
卷 104, 期 2, 页码 129-135出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2010.05.007
关键词
Pb-Ag anode; Electrochemical methods; Acid zinc sulphate electrolyte; Corrosion behaviour; Overpotential; MnSO(4) addition
资金
- Hydro-Quebec
- CEZ
- Natural Sciences and Engineering Research Council of Canada (NSERC)
One Pb-0.25%Ag-0.1%Ca alloy anode and three commercial Pb-0.6%Ag, Pb-0.58%Ag and Pb-0.69%Ag alloys anodes have been studied by conventional electrochemical methods and electrochemical impedance spectroscopy (EIS) in acid zinc sulphate electrolyte with and without MnSO(4) additions to evaluate their activity and corrosion behaviour. At a current density of 50 m Acm(-2) and 38 degrees C, the polished surface of the anode Pb-0.69%Ag alloy had the lowest overpotential, followed closely by that of anodes Pb-0.6%Ag and Pb-0.58%Ag alloys and then anode Pb-0.25%Ag-0.1%Ca alloy in a bath with and without MnSO4 additions. Also, during potential decay period after 5 h electrolysis, the polished surfaces showed that anode Pb-0.69%Ag alloy had the lowest corrosion current among the four examined anodes, followed by anodes Pb-0.6%Ag. Pb-0.25%Ag-0.1%Ca alloys and Pb-0.58%Ag alloy. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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