| Influence of nanocrystallization on passive behavior of Ni-based superalloy in acidic solutions |
| L. Liu; Y. Li; F. H. Wang
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| 2007
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| 发表期刊 | Electrochimica Acta
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| ISSN | 0013-4686
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| 卷号 | 52期号:7页码:2392-2400 |
| 摘要 | The electrochemical corrosion behaviors of Ni-based superalloy nanocrystalline coating (NC) fabricated by a magnetron sputtering technique have been investigated in comparison with cast alloy in 0.25 M Na2SO4 + 0.05 M H2SO4 and 0.5 M NaCl + 0.05 M H2SO4 solution, respectively. Compared with cast alloy, the NC coating had a little higher passive current density in Na2SO4 acidic solution, while it had superior resistance to pitting corrosion in NaCl acidic solution. The semiconductive type of passive film of the NC coating was p-type in both acidic solutions, while, that of cast alloy changed from p-type in Na2SO4 acidic solution to n-type in NaCl acidic solution. XPS results indicated that Cr2O3 was the main component for the passive films of the NC coating as well as those of the cast alloy. No chloride ion was found in the passive film of NC coating while it was in the passive film of cast alloy. The chloride ions adsorbing on the surface of cast alloy incorporated into the passive film, which induced the formation of n-type oxide film. The nanocrystallization of Ni-base superalloy obviously weakened the adsorption of chloride ions on surface, which decreased the susceptibility of pitting corrosion in acidic solution. (c) 2006 Elsevier Ltd. All rights reserved. |
| 部门归属 | chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;li, y (reprint author), chinese acad sci, state key lab corros & protect, inst met res, wencui rd 62, shenyang 110016, peoples r china;liying@imr.ac.cn
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| 关键词 | Nanocrystalline Coating
Ni-based Superalloy
Pitting Corrosion
Stainless-steel
Oxide-films
Electronic-properties
Oxidation Behavior
Corrosion
Breakdown
Nickel
Aluminum
Metals
Growth
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| URL | 查看原文
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| WOS记录号 | WOS:000244344100007
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| 引用统计 |
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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/321006/33713
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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 |
L. Liu,Y. Li,F. H. Wang. Influence of nanocrystallization on passive behavior of Ni-based superalloy in acidic solutions[J]. Electrochimica Acta,2007,52(7):2392-2400.
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| APA |
L. Liu,Y. Li,&F. H. Wang.(2007).Influence of nanocrystallization on passive behavior of Ni-based superalloy in acidic solutions.Electrochimica Acta,52(7),2392-2400.
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| MLA |
L. Liu,et al."Influence of nanocrystallization on passive behavior of Ni-based superalloy in acidic solutions".Electrochimica Acta 52.7(2007):2392-2400.
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