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A New Type Aluminum foam/Pb-0.6 wt%Ag Alloy Composite Anode with Improved Electrochemical Performance for Zinc Electrowinning Industry
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School of Metallurgy and Environment, Central South University, Lushan South Street 932, Yuelu District, Changsha, 410083, China,School of Metallurgy and Environment, Central South University, Lushan South Street 932, Yuelu District, Changsha, 410083, China,School of Metallurgy and Environment, Central South University, Lushan South Street 932, Yuelu District, Changsha, 410083, China,School of Metallurgy and Environment, Central South University, Lushan South Street 932, Yuelu District, Changsha, 410083, China,School of Metallurgy and Environment, Central South University, Lushan South Street 932, Yuelu District, Changsha, 410083, China,School of Metallurgy and Environment, Central South University, Lushan South Street 932, Yuelu District, Changsha, 410083, China

Clc Number:

TF813

Fund Project:

National Nature Science Foundation of China(51304254 and 51274240);China Postdoctoral Science Foundation(2015M580698)

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    Abstract:

    In order to overcome defects of high over-potential and preparation cost existing in traditional Pb alloy anode, a new type aluminum foam/Pb-0.6wt%Ag alloy composite anode (AF/Pb-0.6 wt%Ag anode) was produced in this paper. And the electrochemical performance of AF/Pb-0.6 wt%Ag anode and traditional Pb-0.6 wt%Ag anode after 72 h galvanostic polarization were investigated comparatively in 160 g/L H2SO4 solution by chronopotentiometry(CP), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and Tafel measurements. The results show that the anodic layer of AF/Pb-0.6 wt%Ag anode is more intact than that of Pb-0.6wt%Ag anode, and exhibits better corrosion resistance. Moreover, the AF/Pb-0.6 wt%Ag anode shows a lower stable anodic potential, which is consist with the higher PbO2, lower PbO, PbO?PbSO4 content and Rct value obtained by CP and EIS measurements. It is also revealed that the AF/Pb-0.6 wt%Ag anode possesses better oxygen evolution reaction (OER).

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[Zhou Xiangyang, Ma Chiyuan, Juan Yang, Wang Shuai, Wang Hui, Long Bo. A New Type Aluminum foam/Pb-0.6 wt%Ag Alloy Composite Anode with Improved Electrochemical Performance for Zinc Electrowinning Industry[J]. Rare Metal Materials and Engineering,2018,47(10):3008~3014.]
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History
  • Received:March 13,2017
  • Revised:September 08,2018
  • Adopted:June 23,2017
  • Online: November 08,2018
  • Published: