锌电积用Pb-Ag-Ca-Sr四元合金阳极的阳极极化行为  

Anodization behavior on Pb-Ag-Ca-Sr alloy during zinc electrowinning

作　　者：衷水平[1] 赖延清[1] 蒋良兴[1] 田忠良[1] 李劼[1] 刘业翔[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083

出　　处：《中国有色金属学报》2008年第7期1342-1346,共5页The Chinese Journal of Nonferrous Metals

基　　金：湖南省院士基金资助项目(06FJ4059)

摘　　要：从阳极极化稳定电位、腐蚀速率、阳极极化后表面产物、极化前后的显微组织结构等方面研究Pb-0.3%Ag-0.03%Ca-0.03%Sr四元系合金的阳极极化行为,并与Pb-1%Ag二元合金阳极对比分析。结果表明:当电流密度为50 mA/cm2时,Pb-1%Ag和Pb-0.3%Ag-0.03%Ca-0.03%Sr合金阳极的稳定电极电位分别为1.835 V和1.875 V,腐蚀速率分别为57 mg/(m2.h)和104 mg/(m2.h);Pb-1%Ag阳极电解后表面结构致密,与基体结合紧密,其物相组成为α-PbO2、β-PbO2、PbSO4、Pb和Ag2SO4;Pb-0.3%Ag-0.03%Ca-0.03%Sr阳极电解后表层呈疏松鳞片状,其物相组成为α-PbO2、β-PbO2、PbSO4和PbO1.57。The anodic polarization potential, corrosion rate, surface product after polarization and microstructure before and after polarization of Pb-0.3%Ag-0.03%Ca-0.03%Sr quaternary anode for electrowinning of zinc were studied and compared with Pb-1%Ag ternary anode. The results show that the anode steady potential of Pb-1%Ag and Pb-0.3%Ag-0.03%Ca-0.03%Sr are 1.835 V and 1.875 V, respectively, while the corrosion rate is 57 mg/（m^2·h） and 104 mg/（m^2·h）. The surface structure after experiment in Pb-1%Ag anodes is dense and tightly attached to the base, the phases of the surface are α-PbO2, β-PbO2, PbSO4, Pb and Ag2SO4. While the surface of Pb-0.3%Ag-0.03%Ca-0.03%Sr is loose and like squama, the phases of the surface are α-PbO2, β-PbO2, PbSO4 and PbO1.57.

关 键 词：锌电积 阳极极化 阳极电位 腐蚀速率 

分 类 号：TF813[冶金工程—有色金属冶金]