| Electrochemical Properties and Microstructure of Al/Pb–Ag and Al/Pb–Ag–Co Anodes for Zinc Electrowinning |
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| 基金项目： | financially supported by the National Natural Science Foundation of China (No.51004056);Kunming Hendera of Science and Technology Co.Ltd.;the Analysis and Measurement Foundation of Kunming University of Science and Technology |
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| 摘 要： | The Al/Pb–0.8%Ag and Al/Pb–0.75%Ag–0.03%Co(in mass fraction) anodes used in zinc electrowinning are prepared through the electrodeposition of lead methanesulfonate electrolyte onto an aluminum matrix.The results of anode polarization curves,Tafel curves,and EIS characterizations indicated that the Al/Pb–0.75%Ag–0.03%Co anode has higher electrocatalytic activity and corrosion resistance than the Al/Pb–0.8%Ag anode.SEM observations on the fruit surfaces demonstrated the crystals on the Al/Pb–0.8%Ag anode are larger than on the Al/Pb–0.75%Ag–0.03%Co anode.After 24 h of anodic polarization,SEM observations and XRD analysis showed that the MnO2–PbO2layer on the Al/Pb–0.75%Ag–0.03%Co anode surface is characterized by dendritic crystals,and the PbSO4–PbO2layer under the MnO2–PbO2layer is characterized by uniform and chaotic orientation tetragonal symmetry crystallites of PbSO4.However,the MnO2–PbO2layer on the Al/Pb–0.8%Ag anode surface is characterized by granular crystals,and the PbSO4–PbO2layer under the MnO2–PbO2layer is characterized by well-organized orientation crystallites of PbSO4,which are concentrated in certain zones.
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| 关 键 词： | 阳极极化 铅电解液 电化学性质 锌电解 PbSO4 X射线衍射分析 二氧化铅 SEM观察 |
Electrochemical Properties and Microstructure of Al/Pb-Ag and Al/Pb-Ag-Co Anodes for Zinc Electrowinning |
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| Yongchun Zhang,Buming Chen,Zhongcheng Guo. Electrochemical Properties and Microstructure of Al/Pb-Ag and Al/Pb-Ag-Co Anodes for Zinc Electrowinning[J]. Acta Metallurgica Sinica(English Letters), 2014, 0(2): 331-337 |
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| Authors: | Yongchun Zhang Buming Chen Zhongcheng Guo |
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| Affiliation: | [1]Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunmin 650093, China [2]Kunming Hendera of Science and Technology Co. Ltd, Kunming 650106, China |
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| Abstract: | Zinc electrowinning Corrosion resistance Eiectrocatalytic activity |
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| Keywords: | Zinc electrowinning Corrosion resistance Eiectrocatalytic activity |
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