| Influence of nanocrystallization on passive behavior of Ni-based superalloy in acidic solutions | |
| L. Liu; Y. Li; F. H. Wang | |
| 2007 | |
| Source Publication | Electrochimica Acta
 |
| ISSN | 0013-4686 |
| Volume | 52Issue:7Pages:2392-2400 |
| Abstract | 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. |
| description.department | 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 |
| Keyword | Nanocrystalline Coating Ni-based Superalloy Pitting Corrosion Stainless-steel Oxide-films Electronic-properties Oxidation Behavior Corrosion Breakdown Nickel Aluminum Metals Growth |
| URL | 查看原文 |
| WOS ID | WOS:000244344100007 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/33713 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation 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. |
| 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. |
| 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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