Anodic Behavior of Pb-Ag-Ca-Sr Alloy in Zinc Electrowinning

Xue Tao Yuan; Xu Dong Lv; Yu Gao  Zhou; Zhi Qiang Hua; Yang  Lei; Lei  Wang; Tao Li

doi:10.4028/www.scientific.net/AMR.790.85

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 790Anodic Behavior of Pb-Ag-Ca-Sr Alloy in Zinc...

Anodic Behavior of Pb-Ag-Ca-Sr Alloy in Zinc Electrowinning

Abstract:

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 8.2μAcm^-2 and 20.1μAcm^-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.

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Advanced Materials Research (Volume 790)

Pages:

85-89

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.790.85

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Online since:

September 2013

Authors:

Xue Tao Yuan, Xu Dong Lv, Yu Gao Zhou, Zhi Qiang Hua, Yang Lei, Lei Wang, Tao Li

Keywords:

Anodic Polarization Behavior, Corrosion Current Density, Overpotential for Oxygen Evolution, Zinc Electrowinning

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