| Cathodic Polarization Behavior of Self-Supporting Polyaniline Film Electrode |
| H. Zhu; J. Hu; L. Zhong; F. Gana
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| 2008
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| 发表期刊 | Russian Journal of Electrochemistry
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| ISSN | 1023-1935
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| 卷号 | 44期号:10页码:1120-1126 |
| 摘要 | The preparation method of a self-supporting doped-polyaniline film electrode and its open-circuit potential (OCP) in NaClO4 and Na2SO4 solutions with different pH value as well as cathodic polarization behavior have been investigated for the purpose of discussing the corrosion electrochemical behavior of polyaniline (PANI) in the acid solution. X-ray photoelectron spectroscopy (XPS) reveals that the lower pH corresponds to higher doping level of H+ in the film and a more positive OCP of PANI film electrode. OCP of the PANI film reached 0.35 V vs. SCE in 1M H2SO4, which is more positive than that of most metals, suggests that PANI would act as cathode when it couples with these metals. The cathodic polarization experiments indicate that the dominating cathodic polarization process of PANI is reversible doping and dedoping reaction and the reduction of dissolve oxygen has very little contribution to it. The potentiostatic current-time curves exhibit a large transient current density at initial stage of polarization, which should be attributed to the charge stored in the film and a relative less steady state current density at the subsequent stage of polarization, which is provided by its doping/dedoping equilibrium activity. Such a current characteristic of PANI electrode might be the force of PANI to provide the passivation protection for some active-passive metals. |
| 部门归属 | [zhu, h.; hu, j.; zhong, l.] wuhan univ, sch resource & environm sci, wuhan 430079, peoples r china. [gana, f.] state key lab corros & protect metals, shenyang 110015, peoples r china.;zhu, h (reprint author), wuhan univ, sch resource & environm sci, wuhan 430079, peoples r china;zhuhuawh@gmail.com
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| 关键词 | Polyaniline Film Electrode
Cathodic Polarization
Open Circuit
Potential
Corrosion Protection
Mild-steel
Coatings
Passivation
Inhibition
Mechanism
Acid
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| URL | 查看原文
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/33403
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
H. Zhu,J. Hu,L. Zhong,et al. Cathodic Polarization Behavior of Self-Supporting Polyaniline Film Electrode[J]. Russian Journal of Electrochemistry,2008,44(10):1120-1126.
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| APA |
H. Zhu,J. Hu,L. Zhong,&F. Gana.(2008).Cathodic Polarization Behavior of Self-Supporting Polyaniline Film Electrode.Russian Journal of Electrochemistry,44(10),1120-1126.
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| MLA |
H. Zhu,et al."Cathodic Polarization Behavior of Self-Supporting Polyaniline Film Electrode".Russian Journal of Electrochemistry 44.10(2008):1120-1126.
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