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Effect of doping Bi on oxygen evolution potential and corrosion behavior of Pb-based anode in zinc electrowinning

  • Yan-qing Lai (赖延清)Email author
  • Shui-ping Zhong (衷水平)
  • Liang-xing Jiang (蒋良兴)
  • Xiao-jun Lü (吕晓军)
  • Pei-ru Chen (陈佩如)
  • Jie Li (李 劼)
  • Ye-xiang Liu (刘业翔)
Article

Abstract

A new anodic material of ternary Pb-0.8%Ag-(0–5.0%)Bi alloy for zinc electrowinning was obtained by doping Bi. The anodic oxygen evolution potential, corrosion rate, surface products after polarization, and microstructures before and after polarization were studied and compared with those of Pb-0.8%Ag anode used in industry. The results show the anodic overpotential decreases with the increase of Bi content in the alloys. When the content of Bi is 1.0% (mass fraction), the anodic overpotential is 40–50 mV lower than that of Pb-0.8%Ag anode. While the corrosion rate decreases and then increases with the increase of Bi content. The Pb-0.8%Ag-0.1%Bi anode has the lowest corrosion rate (0.090 6 mg/(h·cm2). Doping Bi influences the structure of the anodic layer, but does not change the phase. The Pb-0.8%Ag-1.0%Bi anode layer is of a more fine-grained structure compared with Pb-0.8%Ag anode.

Key words

Pb-Ag anode doping Bi zinc electrowinning oxygen evolution potential corrosion rate 

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References

  1. [1]
    WANG Yan-jun, XIE Gang, YANG Da-jin, LI Yong-jia, XIAO Ting-man. Analysis on decreasing of direct current power consumption in zinc electrowinning [J]. Hydrometallurgy of China, 2005, 24(4): 208–211. (in Chinese)Google Scholar
  2. [2]
    PFNG Gen-fang. Analyses and optimization exploration of D.C. consumption in zinc electrowinning [J]. Energy Saving of Non-ferrous Metallurgy, 2003, 20(2): 17–20. (in Chinese)Google Scholar
  3. [3]
    IVANOV I, STEFANOV Y, NONCHEVA Z, PETROVA M, DOBREV T, MIRKOVA L, VERMEERSCH R, DEMAEREL J P. Insoluble anodes used in hydrometallurgy. Part II. Anodic behaviour of Pb and Pb-alloy anodes [J]. Hydrometallurgy, 2000, 57(2): 125–139.CrossRefGoogle Scholar
  4. [4]
    IVANOV I, STEFANOV Y, NONCHEVA Z, PETROVA M, DOBREV T, MIRKOVA L, VERMEERSCH R, DEMAEREL J P. Insoluble anodes used in hydrometallurgy. Part I. Corrosion resistance of Pb and Pb alloy anodes [J]. Hydrometallurgy, 2000, 57(2): 109–124.CrossRefGoogle Scholar
  5. [5]
    STEFANOV Y, DOBREV T. Potentiodynamic and electronmicroscopy investigations of Pb-cobalt alloy coated Pb composite anodes for zinc electrowinning [J]. Transactions of the Institute of Metal Finishing, 2005, 83(6): 296–299.CrossRefGoogle Scholar
  6. [6]
    LI Bao-song, LIN An, GAN Fu-xing. Preparation and electrocatalytic properties of Ti/IrO2-Ta2O5 anodes for oxygen evolution [J]. Trans Nonferrous Met Soc China, 2006, 16(5): 1193–1199.CrossRefGoogle Scholar
  7. [7]
    HU Ji-ming, ZHANG Jian-qing, CAO Chu-nan. Oxygen evolution reaction on IrO2-based DSA type electrodes: Kinetics analysis of Tafel lines and EIS [J]. International Journal of Hydrogen Energy, 2004, 29(8): 791–797.CrossRefGoogle Scholar
  8. [8]
    STEFANOV Y, DOBREV T. Developing and studying the properties of Pb-TiO2 alloy coated Pb composite anodes for zinc electrowinning [J]. Transactions of the Institute of Metal Finishing, 2005, 83(6): 291–295.CrossRefGoogle Scholar
  9. [9]
    ZHONG Shui-ping, LAI Yan-qing, JIANG Liang-xing. Research development of new anode and techniques for zinc electrowinning [J]. Materials Review, 2008, 22(2): 86–89. (in Chinese)Google Scholar
  10. [10]
    WESSELMARK M, LAGERGREN C, LINDERGH G. Methanol oxidation as anode reaction in zinc electrowinning [J]. Journal of the Electrochemical Society, 2005, 152(11): D201–D207.CrossRefGoogle Scholar
  11. [11]
    JIN Bing-Jie, YANG Xian-wan. Application of gas diffusion anode for zinc hydrometallurgy [J]. Yunnan Metallurgy, 2007, 36(3): 37–39. (in Chinese)Google Scholar
  12. [12]
    SU Yi, JIN Zuo-mei, DAI Zu-yuan. SO2 anodic reaction kinetics in zinc electrowinning [J]. The Chinese Journal of Nonferrous Metals, 2001, 11(3): 495–498. (in Chinese)Google Scholar
  13. [13]
    RICE D M. Effects of bismuth on the electrochemical performance of Pb/acid batteries [J]. Journal of Power Sources, 1989, 28(1/2): 69–83.CrossRefGoogle Scholar
  14. [14]
    LI Wei-shan, CHEN Hong-yu, LONG Xue-mei, WU Fan-hua, YAN Jun-hua, ZHANG Cheng-ru. Oxygen evolution reaction on Pb-bismuth alloys in sulfuric acid solution [J]. Journal of Power Sources, 2006, 158(2): 902–907.CrossRefGoogle Scholar
  15. [15]
    HE Qiu-xing TU Wei-ping, HU Jian-qing. Synthesis and characterization of bismuth-doped tin dioxide nanometer powders [J]. Journal of Central South University of Technology, 2006, 13(5): 519–524.CrossRefGoogle Scholar
  16. [16]
    HRUSSANOVA A, MIRKOVA L, DOBREV T. Electrochemical properties of Pb-Sb, Pb-Ca-Sn and Pb-Co3O4 anodes in copper electrowinning [J]. Journal of Applied Electrochemistry, 2002, 32(5): 505–512.CrossRefGoogle Scholar
  17. [17]
    LAITINEN T, SUNDHOLM G, VILHUNEN J K. Comments on sample treatment in the X-ray diffraction analysis of the oxidation products of Pb [J]. Journal of Power Sources, 1990, 32(1): 71–80.CrossRefGoogle Scholar

Copyright information

© Central South University Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Yan-qing Lai (赖延清)
    • 1
    Email author
  • Shui-ping Zhong (衷水平)
    • 1
  • Liang-xing Jiang (蒋良兴)
    • 1
  • Xiao-jun Lü (吕晓军)
    • 1
  • Pei-ru Chen (陈佩如)
    • 1
  • Jie Li (李 劼)
    • 1
  • Ye-xiang Liu (刘业翔)
    • 1
  1. 1.School of Metallurgical Science and EngineeringCentral South UniversityChangshaChina

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