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Fabrication and anodic polarization behavior of lead-based porous anodes in zinc electrowinning

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Abstract

A new type of lead-based porous anode in zinc electrowinning was prepared by negative pressure infiltration. The anodic polarization potential and corrosion rate were studied and compared with those of traditional flat anodes (Pb-0.8%Ag) used in industry. The anode corrosion rate was determined by anode actual current density and microstructure. The results show that the anodic oxygen evolution potential decreases first and then increases with the decrease of pore diameter. The anodic potential decreases to the lowest value of 1.729 V at the pore diameter of 1.25–1.60 mm. The porous anode can decrease its actual current density and thus decrease the anodic corrosion rate. When the pore diameter is 1.60–2.00 mm, the anodic relative corrosion rate reaches the lowest value of 52.1%.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Shui-ping Zhong  (衷水平), Yan-qing Lai  (赖延清), 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)

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  1. Shui-ping Zhong  (衷水平)
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  2. Yan-qing Lai  (赖延清)
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  3. Liang-xing Jiang  (蒋良兴)
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  4. Xiao-jun Lü  (吕晓军)
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  5. Pei-ru Chen  (陈佩如)
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  6. Jie Li  (李 劼)
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  7. Ye-xiang Liu  (刘业翔)
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Corresponding author

Correspondence to Yan-qing Lai  (赖延清).

Additional information

Foundation item: Project(2007SK2009) supported by the Science and Technology Research Project of Hunan Province, China

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Zhong, Sp., Lai, Yq., Jiang, Lx. et al. Fabrication and anodic polarization behavior of lead-based porous anodes in zinc electrowinning. J. Cent. South Univ. Technol. 15, 757–762 (2008). https://doi.org/10.1007/s11771-008-0140-6

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  • DOI: https://doi.org/10.1007/s11771-008-0140-6

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