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properties of a new type A1/Pb-0.3%Ag alloy composite anode for zinc electrowinning

ISSN号：1674-4799
期刊名称：International Journal of Minerals Metallurgy and M
时间：2013.10.10
页码：986-993
分类：TG146.21[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学] TQ137.12[化学工程—无机化工]
作者机构：[1]Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China, [2]Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China, [3]Kunming Hendera Science and Technology Co. Ltd., Kunming 650106, China, [4]State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization, Kunming 650093, China
相关基金：Acknowledgement s This work is financially supported by the National Natural Science Foundation of China （No. 51004056）, the Opening Foundation of the Key Laboratory of In- organic Coating Materials, Chinese Academy of Sciences （No. KKZ6201152009）, the Specialized Research ~nd for the Doctoral Program of Higher Education （No. 20125314110011）, the Applied Basic Research Foundation of Yunnan Province, China （No. 2010ZC052）, and the Analysis and Testing Foundation of Kunming University of Science and Technology （Nos. 2010203 and 2011173）.
相关项目：锌电积用二氧化铅颗粒增强铅基合金复合材料制备及电化学性能研究

关键词：合金性能, 复合阳极, AG, 硬质阳极氧化, 锌电积, 加速腐蚀试验, 扫描电子显微镜, 阳极氧化层, composite anodes, corrosion resistance, oxygen evolution reaction, electrocatalytic activity, zinc electrowin-ning

中文摘要：

An Al/Pb-0.3%Ag alloy composite anode was produced via composite casting.Its electrocatalytic activity for the oxygen evolution reaction and corrosion resistance was evaluated by anodic polarization curves and accelerated corrosion test,respectively.The microscopic morphologies of the anode section and anodic oxidation layer during accelerated corrosion test were obtained by scanning electron microscopy.It is found that the composite anode(hard anodizing)displays a more compact interfacial combination and a better adhesive strength than plating tin.Compared with industrial Pb-0.3%Ag anodes,the oxygen evolution overpotentials of Al/Pb-0.3%Ag alloy(hard anodizing)and Al/Pb-0.3%Ag alloy(plating tin)at 500 A·m–2were lower by 57 and 14 mV,respectively.Furthermore,the corrosion rates of Pb-0.3%Ag alloy,Al/Pb-0.3%Ag alloy(hard anodizing),and Al/Pb-0.3%Ag alloy(plating tin)were 13.977,9.487,and 11.824 g·m–2·h–1,respectively,in accelerated corrosion test for 8 h at 2000 A·m–2.The anodic oxidation layer of Al/Pb-0.3%Ag alloy(hard anodizing)is more compact than Pb-0.3%Ag alloy and Al/Pb-0.3%Ag alloy(plating tin)after the test.

英文摘要：

An A1/Pb-0.3%Ag alloy composite anode was produced via composite casting. Its electrocatalytic activity for the oxygen evolution reaction and corrosion resistance was evaluated by anodic polarization curves and accelerated corro- sion test, respectively. The microscopic morphologies of the anode section and anodic oxidation layer during accelerated corrosion test were obtained by scanning electron microscopy. It is found that the composite anode （hard anodizing） dis- plays a more compact interracial combination and a better adhesive strength than plating tin. Compared with industrial Pb-0.3%Ag anodes, the oxygen evolution overpotentials of A1/Pb-0.3%Ag alloy （hard anodizing） and A1/Pb-0.3%Ag alloy （plating tin） at 500 A.m-2 were lower by 57 and 14 mV, respectively. Furthermore, the corrosion rates of Pb-0.3%Ag alloy, A1/Pb-0.3%Ag alloy （hard anodizing）, and A1/Pb-0.3%Ag alloy （plating tin） were 13.977, 9.487, and 11.824 g.m-2.h-1, respectively, in accelerated corrosion test for 8 h at 2000 A-m-2. The anodic oxidation layer of A1/Pb-0.3%Ag alloy （hard anodizing） is more compact than Pb-0.3%Ag alloy and A1/Pb-0.3%Ag alloy （plating tin） after the test.

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