| Electrochemical corrosion behavior of nanocrystalline Co coatings explained by higher grain boundary density | |
| Department | 固体润滑国家重点实验室 ; 先进润滑与防护材料研究发展中心 |
Wang LP(王立平) ; Lin YM(林义民); Ceng ZX(曾志翔); Liu WM(刘维民); Xue QJ(薛群基); Hu LT(胡丽天); Zhang JY(张俊彦)
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| 2007 | |
| Source Publication | Electrochimica Acta
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| ISSN | 0013-4686 |
| Volume | 52Pages:4342-4350 |
| Abstract | In this paper, nanocrystalline Co coatings were prepared using pulse reverse electrodeposition method. The electrochemical corrosion behavior of nanocrystalline (NC) Co compared with coarse-grained Co (CG) coatings in different corrosion media were characterized using potentiodynamic polarization test, electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). Results showed that in the NaOH or NaCl solutions, the NC Co exhibited improved corrosion resistance when compared with CG Co coatings, which is due to the higher grain boundary density in NC materials to quickly form a stable and protective passive film. In the case of NC Co coatings in HCl or H2SO4 solutions, since no obviously passive process can be observed, high grain boundary density in NC Co will accelerate corrosion by providing high-density of active sites for preferential attack. The controversial experimental results on NC Co coatings in different corrosion media can be reasonably explained by the positive or negative effect of high-density network of grain boundaries in NC materials. |
| Keyword | Nanocrystalline Cobalt Corrosion Behavior Electrodeposition Grain Boundary Density |
| Subject Area | 材料科学与物理化学 |
| Funding Organization | the National Key Basic Research Program (No. 2007CB607601);National Natural Science Foundation of China (Grant No. 50432020;50575218);Hundreds Talent Program of Chinese Academy of Sciences;the prearranged project of General Armament Department (maintenance techniques subject) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 低维材料摩擦学组 ; 空间润滑材料组 ; 特种油脂和密封材料组 ; 纳米润滑研究组 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/4075 |
| Collection | 固体润滑国家重点实验室（LSL） 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 |
| Corresponding Author | Wang LP(王立平); Xue QJ(薛群基) |
| Recommended Citation GB/T 7714 | Wang LP,Lin YM,Ceng ZX,et al. Electrochemical corrosion behavior of nanocrystalline Co coatings explained by higher grain boundary density[J]. Electrochimica Acta,2007,52:4342-4350. |
| APA | 王立平.,林义民.,曾志翔.,刘维民.,薛群基.,...&张俊彦.(2007).Electrochemical corrosion behavior of nanocrystalline Co coatings explained by higher grain boundary density.Electrochimica Acta,52,4342-4350. |
| MLA | 王立平,et al."Electrochemical corrosion behavior of nanocrystalline Co coatings explained by higher grain boundary density".Electrochimica Acta 52(2007):4342-4350. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 20074342-4350.pdf（1282KB） | 开放获取 | CC BY-NC-SA | View Application Full Text | |||
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