冷却方式对电积锌用铸态Pb-Ag阳极耐蚀性的影响
Influence of Cooling Type on Electrochemical Corrosion Behavior of As-cast Pb-Ag Anode in Zinc Electrowinning
摘 要
采用热场扫描电子显微镜和电化学工作站对不同冷却速率制备的铸态Pb-Ag合金的微观组织和电化学腐蚀行为进行了测试。结果表明, 水冷方式会显著提高环形胞状物边界的含量, 从而降低合金在电积锌液中的耐蚀性。
电积锌
冷却方式
耐蚀性
as-cast lead alloy anode
zinc electrowinning
cooling type, corrosion resistance
Abstract
The microstructure and electrochemical corrosion behavior of as-cast Pb-Ag alloy prepared at different cooling rates were studied by field emission SEM (FESEM) and electrochemical workstation. The results show that the water-cooled lead alloy can obviously increase the faction of cellular boundaries and consequently decrease the corrosion resistance of lead alloy in zinc electrowinning.
中图分类号 TG174
所属栏目 试验研究
基金项目 国家科技支撑计划项目(2012BAE06B06); 广西千亿元产业重大科技攻关项目(2012AA04018)
收稿日期 2012/10/9
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备注袁学韬, 高级工程师, 博士,
引用该论文: YUAN Xue-tao,LEI Yang,LV Xu-dong,ZHOU Yu-gao,HUA Zhi-qiang,WANG Lei,LI Tao. Influence of Cooling Type on Electrochemical Corrosion Behavior of As-cast Pb-Ag Anode in Zinc Electrowinning[J]. Corrosion & Protection, 2012, 33(12): 1039
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【6】Osorio W R, Aoki C S C, Garcia A. Effects of microstructural arrangement on hot corrosion resistance of a Pb-Sb alloy for battery grids[J]. Materials Science Forum, 2008, 595-598:851-859.
【7】Osorio W R, Rosa D M, Garcia A. The roles of cellular and dendritic microstructural morphologies on the corrosion resistance of Pb-Sb alloys for lead acid battery grids[J]. Journal of Power Sources, 2008, 175:595-603.
【8】Rosa D M, Spinelli J E, Osorio W R, et al. Effect of cell size and macro-segregation on the corrosion behavior of a dilute Pb-Sb alloy[J]. Journal of Power Sources, 2006, 162:696-705.
【9】Osorio W R, Aoki C, Garcia A. Hot corrosion resistance of a Pb-Sb alloy for lead acid battery grids[J]. Journal of Power Sources, 2008, 185:1471-1477.
【10】Peixoto L C, Osorio W R, Garcia A. Microstructure and electrochemical corrosion behavior of a Pb-1% Sn alloy for lead-acid battery components[J]. Journal of Power Sources, 2009, 192:724-729.
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