锌电积用Pb-Ag-Ca-Sr四元合金阳极的阳极极化行为-有色金属在线

简介概要

锌电积用Pb-Ag-Ca-Sr四元合金阳极的阳极极化行为

来源期刊：中国有色金属学报2008年第7期

论文作者：衷水平赖延清蒋良兴田忠良李劼刘业翔

文章页码：1342 - 1342

关键词：锌电积；阳极极化；阳极电位；腐蚀速率

Key words：zinc electrowinning; anodization; anode potential; corrosion rate

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PbO_1.57。

Abstract: 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/(m2？h) and 104 mg/(m2？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.

基金信息：湖南省院士基金资助项目

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