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3.71V降到3.57V后急剧升高到10V,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.
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.
出处
《过程工程学报》
CAS
CSCD
北大核心
2010年第5期1020-1024,共5页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:50974065)
关键词
聚苯胺/碳化钨阳极
锌电积
结构变化
失效行为
polyaniline/tungsten carbide anode
zinc electrowinning
structural change
failure behavior
作者简介
黄惠（1978-），女，云南省宣威市人，博士，讲师，主要研究方向为新型阳极材料，E-mail：huihuanghan@163．com．
