Electrochemical impedance models for molten salt corrosion
文献类型：期刊论文
| 作者 | C. L. Zeng ; W. Wang ; W. T. Wu |
| 刊名 | Corrosion Science
 |
| 出版日期 | 2001 |
| 卷号 | 43期号:4页码:787-801 |
| ISSN号 | 0010-938X |
| 关键词 | electrochemical impedance Pt molten-salt corrosion Ni3Al FeAl electrode ni |
| 中文摘要 | Taking into account the chemical stability and scaling features of metals, four electrochemical impedance models were proposed to represent their electrochemical impedance responses in molten-salt systems at the open-circuit potential. Electrochemical charge transfer for the non-active metals is the rate-limiting process. For the active metals, the transfer of ions in the scale and the diffusion of oxidants in melts become increasingly important as compared with the electrochemical process. When a non-protective scale forms on the metal surface, the impedance diagram may present the characteristics typical of a diffusion-controlled reaction. i.e.. a semi-circle at high frequency and a line at low frequency. When a protective scale forms on the metal surface, the Nyquist plot is composed of double capacitance loops, and the transfer of ions in the scale is rate limiting. An equivalent circuit of double layer capacitance in series with oxide capacitance can be used to represent this kind of impedance response. In the case of localized corrosion, the Nyquist plot also consists of double capacitance loops, which can be described by an equivalent circuit of double layer capacitance parallel to oxide capacitance. Impedance measurements of Pt. Ni3Al and FeAl intermetallics in molten-salt systems were conducted to verify the proposed impedance models. (C) 2001 Elsevier Science Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36894]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | C. L. Zeng,W. Wang,W. T. Wu. Electrochemical impedance models for molten salt corrosion[J]. Corrosion Science,2001,43(4):787-801. |
| APA | C. L. Zeng,W. Wang,&W. T. Wu.(2001).Electrochemical impedance models for molten salt corrosion.Corrosion Science,43(4),787-801. |
| MLA | C. L. Zeng,et al."Electrochemical impedance models for molten salt corrosion".Corrosion Science 43.4(2001):787-801. |
入库方式： OAI收割
来源：金属研究所
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