Compactness of micro-arc oxidation coatings on AZ91D magnesium alloys and its effect on coating corrosion resistance

	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
	2015-04-01
发表期刊	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
ISSN	10040609
卷号	25 期号:4 页码:844-851
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.
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
收录类别	EI
语种	中文
出版者	Central South University of Technology
EI入藏号	20152100862883
EI主题词	Corrosion resistant coatings
EI分类号	539.1 Metals Corrosion - 542.2 Magnesium and Alloys - 702 Electric Batteries and Fuel Cells - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
来源库	Compendex
分类代码	539.1 Metals Corrosion - 542.2 Magnesium and Alloys - 702 Electric Batteries and Fuel Cells - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
文献类型	期刊论文
条目标识符	https://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
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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.