Electrochemical impedance studies of molten (0.9Na,0.1K)(2)SO4-induced hot corrosion of the Ni-based superalloy M38G at 900 degrees C in air
文献类型：期刊论文
| 作者 | C. L. Zeng ; J. Li |
| 刊名 | Electrochimica Acta
 |
| 出版日期 | 2005 |
| 卷号 | 50期号:28页码:5533-5538 |
| 关键词 | Ni-based superalloy M38G (Na K)2SO(4) hot corrosion electrochemical impedance impedance models 650 degrees-c preoxidized ni salt corrosion na2so4 film electrode alloy |
| ISSN号 | 0013-4686 |
| 中文摘要 | The hot corrosion behavior of the Ni-based superalloy M38G covered with a film of molten 0.9Na(2)SO(4)-0.1K(2)SO(4) (mole fraction) has been studied by electrochemical impedance spectroscopy at 900 degrees C in air. For comparison, the corrosion of the alloy immersed in molten (Na,K)(2)SO4 was also examined. The electrochemical impedance spectra in deep molten salt during an initial stage consisted of a semicircle at high frequency and a line at low frequency indicating a diffusion-controlled reaction. With extended immersion the impedance spectra were composed of two capacitive loops, i.e., a small semicircle at high-frequency port, and a large one at low-frequency port. The change of the impedance spectra is related to the formation of a protective scale. Contrary to the corrosion in deep molten salt, the corrosion of the alloy in the presence of a film of fused salt presented the characteristics of two capacitive loops for all the duration of the experimental test. Equivalent circuits representing the corrosion of the alloy in both corrosion conditions are proposed to fit the impedance spectra and electrochemical parameters in the equivalent circuits are also calculated. (C) 2005 Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35191]  |
| 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,J. Li. Electrochemical impedance studies of molten (0.9Na,0.1K)(2)SO4-induced hot corrosion of the Ni-based superalloy M38G at 900 degrees C in air[J]. Electrochimica Acta,2005,50(28):5533-5538. |
| APA | C. L. Zeng,&J. Li.(2005).Electrochemical impedance studies of molten (0.9Na,0.1K)(2)SO4-induced hot corrosion of the Ni-based superalloy M38G at 900 degrees C in air.Electrochimica Acta,50(28),5533-5538. |
| MLA | C. L. Zeng,et al."Electrochemical impedance studies of molten (0.9Na,0.1K)(2)SO4-induced hot corrosion of the Ni-based superalloy M38G at 900 degrees C in air".Electrochimica Acta 50.28(2005):5533-5538. |
入库方式： OAI收割
来源：金属研究所
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