陽極極化行為
(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083)
摘 要:
關(guān)鍵字: 鋅電積；陽極極化；陽極電位；腐蝕速率
during zinc electrowinning
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
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.
Key words: zinc electrowinning; anodization; anode potential; corrosion rate
