Anodic behavior of Pb-Ag-Ca-Sr alloy in zinc electrowinning
(0) Over potentials for oxygen evolution reaction,corrosion rate,surface product after polarization and microstructure before and after polarization of Pb-0.2%Ag-0.08%Ca-0.05%Sr quaternary anode in zinc electrowinning were studied and compared with Pb-0.6%Ag binary anode.The results show that over potentials for oxygen evolution reaction on Pb-0.6%Ag and Pb-0.2%Ag-0.08%Ca-0.05%Sr anodes are 675 mV and 790 mV,respectively,while the corrosion current density are 8.2μA·cm-2 and 20.1μA·cm-2.The surface structure after experiment of in Pb-Ag anodes is dense and tightly attached to the base,while the surface of Pb-Ag-Ca-Sr is loose and porous.The phases of the surface are PbO2,PbSO4 and MnO2 on both anods.
zinc electrowinning anodic polarization behavior overpotential for oxygen evolution corrosion current density
Xuetao Yuan Xudong Lv Yugao Zhou Zhiqiang Hua Yang Lei Lei Wang Tao Li
Beijing General Research Institute for Nonferrous Metals,Beijing 100088,China Hechi Nanfang Non-ferrous Metals(Group)Smelting Co.,Ltd,Hechi,547000
国际会议
西安
英文
663-667
2013-07-27（万方平台首次上网日期，不代表论文的发表时间）