Knowledge Management System Of Shanghai Institute of Applied Physics, CAS
| Nano Al2O3/phosphate Composite Conversion Coating Formed on Magnesium Alloy for Enhancing Corrosion Resistance | |
| Zhao, Ming; Li, Jianguo; He, Guangping; Xie, Honglan; Fu, Yanan | |
| 2013 | |
| Source Publication | JOURNAL OF THE ELECTROCHEMICAL SOCIETY
 |
| ISSN | 0013-4651; 1945-7111 |
| Volume | 160Issue:11Pages:C553-C559 |
| Abstract | Novel nano Al2O3/phosphate composite conversion coatings with no visible defects were formed on AZ91D magnesium ahoy in a phosphate solution containing Al2O3 nanoparticles by applying a magnetic field. The formation of these coatings was investigated using the synchrotron radiation real-time imaging technique. The coatings' surface morphology, chemical composition and structure were examined by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM). Scanning vibrating electrode (SVET) and polarization curves were employed to evaluate their corrosion resistance in NaCl solution. The results show that the superposition of a magnetic field during the coating formation process can promote the generation of small hydrogen bubbles and accelerate their desorption, which favors the embedding of Al2O3 nanoparticles in the amorphous matrix. In the absence of a magnetic field, hydrogen bubble evolution could be one of the main reasons for the development of microdefects in phosphate conversion coatings. This defective phosphate conversion coating is amorphous and contains no Al2O3 nanoparticles, although the phosphate solution contains Al2O3 nanoparticles. The results demonstrate that the nano Al2O3/phosphate composite conversion coating obtained using a magnetic field exhibits better corrosion resistance than defective phosphate conversion coatings obtained without a magnetic field. (C) 2013 The Electrochemical Society. All rights reserved. |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 应物所项目组 |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/13632 |
| Collection | 中科院上海应用物理研究所2011-2020年 |
| Recommended Citation GB/T 7714 | Zhao, Ming,Li, Jianguo,He, Guangping,et al. Nano Al2O3/phosphate Composite Conversion Coating Formed on Magnesium Alloy for Enhancing Corrosion Resistance[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2013,160(11):C553-C559. |
| APA | Zhao, Ming,Li, Jianguo,He, Guangping,Xie, Honglan,&Fu, Yanan.(2013).Nano Al2O3/phosphate Composite Conversion Coating Formed on Magnesium Alloy for Enhancing Corrosion Resistance.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,160(11),C553-C559. |
| MLA | Zhao, Ming,et al."Nano Al2O3/phosphate Composite Conversion Coating Formed on Magnesium Alloy for Enhancing Corrosion Resistance".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 160.11(2013):C553-C559. |
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| Nano Al2O3-phosphate（2209KB） | 开放获取 | CC BY-NC-SA | View Download | |||
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