Compactness of micro-arc oxidation coatings on AZ91D magnesium alloys and its effect on coating corrosion resistance | |
Dong, Hai-Rong; Ma, Ying; Guo, Hui-Xia; Zhang, Yu-Fu; Hao, Yuan | |
刊名 | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
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2015-04-01 | |
卷号 | 25期号:4页码:844-851 |
关键词 | Corrosion resistance Electrolytes Magnesium alloys Oxidation Porosity Silicates Surface defects AZ91D magnesium alloys Calculation formula Compactness Micro-arc oxidation coatings Microarc oxidation Micropores Size and shape Surface porosity |
ISSN号 | 10040609 |
英文摘要 | The coatings on AZ91D magnesium alloys were prepared by micro-arc oxidation (MAO) in silicate-containing electrolyte. The method to research the compactness of the coatings was discussed and a calculation formula of the density of the coatings was deduced. Meanwhile, the size and amount of the micro pores on the surface and the surface porosity of the coatings treated for different times were analyzed quantitatively. And the effect of the above factors on the corrosion resistance of the coatings was researched. The results show that, the phase composition of the coatings has no change with the extension of treatment time, so, the compactness of the coatings can be researched indirectly through the density of the coatings. With prolonging treatment time, the micro pores on the surface of the coatings become bigger constantly. The differences in size and shape of the micro pores also become more serious. The surface porosities of the coatings gradually increase from 8% to 15%. After treating for 5 and 10 min, the compactness of the coatings is large, however, after treating for 20 min, the compactness decreases greatly and basically remains unchanged. The corrosion resistance of the sample treated for 30 min is the best, because the coatings has a larger thickness, higher compactness and less surface defects on the surface. ©, 2015, Central South University of Technology. All right reserved. |
语种 | 中文 |
出版者 | Central South University of Technology |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/112344] ![]() |
专题 | 材料科学与工程学院 |
作者单位 | State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China |
推荐引用方式 GB/T 7714 | Dong, Hai-Rong,Ma, Ying,Guo, Hui-Xia,et al. Compactness of micro-arc oxidation coatings on AZ91D magnesium alloys and its effect on coating corrosion resistance[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2015,25(4):844-851. |
APA | Dong, Hai-Rong,Ma, Ying,Guo, Hui-Xia,Zhang, Yu-Fu,&Hao, Yuan.(2015).Compactness of micro-arc oxidation coatings on AZ91D magnesium alloys and its effect on coating corrosion resistance.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,25(4),844-851. |
MLA | Dong, Hai-Rong,et al."Compactness of micro-arc oxidation coatings on AZ91D magnesium alloys and its effect on coating corrosion resistance".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 25.4(2015):844-851. |
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