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›› 2010, Vol. 10 ›› Issue (5): 1020-1024.

• 材料工程专栏 • Previous Articles     Next Articles

Structural Change and Failure Behavior of Polyaniline/Tungsten Carbide Anode during Electrowinning of Zinc

HUANG Hui， GUO Zhong-cheng， LI Ju-kang， CHEN Bu-ming,   

  1. Faculty of Metallurgical and Energy Engineering， Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering， Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering， Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering， Kunming University of Science and Technology
  • Received:2010-07-27 Revised:2010-10-08 Online:2010-10-20 Published:2010-10-20
  • Contact: HUANG Hui，

锌电积过程中聚苯胺/碳化钨阳极的结构变化及失效行为

黄惠 郭忠诚 李具康 陈步明   

  1. 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院
  • 通讯作者: 黄惠

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Abstract: The structural change and failure behavior of polyaniline/tungsten carbide (PANI/WC) anode were studied during the electrowinning process of zinc in H2SO4 solution. The morphology and microstructure behavior of PANI/WC anode under different electrowinning conditions were studied by accelerated life test and instrumental analysis. The results showed that the variation of cell potential went through three stages (instability, stability and rapid rising) in the whole electrowinning process. The morphology of the anode changed obviously, and its microstructure unchanged in these stages. When the process was finished, PANI/WC anode cracked, subsequently flaked off and became inactive rapidly. The main failure mechanism of the PANI/WC anode resulted from the gradual peeling off of the PANI covered on the surface of WC.

Key words: polyaniline/tungsten carbide anode, zinc electrowinning, structural change, failure behavior

摘要： 研究了锌电积过程中聚苯胺/碳化钨(PANI/WC)阳极的结构变化和失效行为，采用加速电解寿命测试和仪器分析考察了PANI/WC阳极在锌电积过程中表面形貌和结构的变化. 结果表明，整个电解过程中槽电压从3.71 V降到3.57 V后急剧升高到10 V，即经历活化、稳定、迅速升高阶段. 随锌电积进行，阳极表面出现脱落、开裂，迅速进入失效阶段，而微观结构无明显变化. PANI/WC阳极失效主要是由包覆WC的PANI大量剥蚀而使WC裸露和阳极开裂导致的.

关键词: 聚苯胺/碳化钨阳极, 锌电积, 结构变化, 失效行为

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