The effect of phosphate on MAO of AZ91D magnesium using AC power source

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	The effect of phosphate on MAO of AZ91D magnesium using AC power source; The effect of phosphate on MAO of AZ91D magnesium using AC power source
	Q. Wen; F. H. Cao; Y. Y. Shi; Z. Zhang; J. Q. Zhang
	2008 ; 2008
发表期刊	Materials and Corrosion-Werkstoffe Und Korrosion ; Materials and Corrosion-Werkstoffe Und Korrosion
ISSN	0947-5117 ; 0947-5117
卷号	59 期号:10 页码:819-824
摘要	A rapid and convenient anodization technology with AC power source to obtain the MAO films formed on magnesium alloy AZ91D in phosphate bath (base electrolyte + Na3PO4) with or without aluminate and silicate was studied. The corrosion resistance of the anodic films was studied by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques and the microstructure and composition of films were examined by SEM and XRD. The results show that Na3PO4 can promote the occurrence of sparking during the MAO process, while abundant heat generated by sparking might enhance the formation of the glassy phase of the compound when the electrolyte contains the additives of NaAlO2 and Na2SiO3 simultaneously. The optimized MAO film is ivory-white smooth by naked eye, while presents porous and microcracks in microscopic scale. The anodic film formed in the alkaline solution with optimized parameters possesses superior corrosion resistance by electrochemical test. The XRD pattern shows that the components of the anodized film consist of MgO, MgAlO2, and MgSiO3. No oxide crystal with P element can be found.; A rapid and convenient anodization technology with AC power source to obtain the MAO films formed on magnesium alloy AZ91D in phosphate bath (base electrolyte + Na3PO4) with or without aluminate and silicate was studied. The corrosion resistance of the anodic films was studied by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques and the microstructure and composition of films were examined by SEM and XRD. The results show that Na3PO4 can promote the occurrence of sparking during the MAO process, while abundant heat generated by sparking might enhance the formation of the glassy phase of the compound when the electrolyte contains the additives of NaAlO2 and Na2SiO3 simultaneously. The optimized MAO film is ivory-white smooth by naked eye, while presents porous and microcracks in microscopic scale. The anodic film formed in the alkaline solution with optimized parameters possesses superior corrosion resistance by electrochemical test. The XRD pattern shows that the components of the anodized film consist of MgO, MgAlO2, and MgSiO3. No oxide crystal with P element can be found.
部门归属	[wen, q.; cao, f. -h.; shi, y. -y.; zhang, z.] zhejiang univ, dept chem, hangzhou 310027, peoples r china. [zhang, j. -q.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;wen, q (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;nelson_cao@zju.edu.cn ; [wen, q.; cao, f. -h.; shi, y. -y.; zhang, z.] zhejiang univ, dept chem, hangzhou 310027, peoples r china. [zhang, j. -q.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;wen, q (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;nelson_cao@zju.edu.cn
关键词	Micro-arc Oxidation Micro-arc Oxidation Electrochemical Impedance Spectroscopy Electrochemical Impedance Spectroscopy Koh-aluminate Solutions Koh-aluminate Solutions Corrosion Protection Corrosion Protection Ceramic Coatings Ceramic Coatings Alloys Alloys Anodization Anodization Parameters Parameters Resistance Resistance Behavior Behavior
URL	查看原文 ; 查看原文
WOS记录号	WOS:000260715600006 ; WOS:000260715600006
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33193
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. Wen,F. H. Cao,Y. Y. Shi,et al. The effect of phosphate on MAO of AZ91D magnesium using AC power source, The effect of phosphate on MAO of AZ91D magnesium using AC power source[J]. Materials and Corrosion-Werkstoffe Und Korrosion, Materials and Corrosion-Werkstoffe Und Korrosion,2008, 2008,59, 59(10):819-824, 819-824.
APA	Q. Wen,F. H. Cao,Y. Y. Shi,Z. Zhang,&J. Q. Zhang.(2008).The effect of phosphate on MAO of AZ91D magnesium using AC power source.Materials and Corrosion-Werkstoffe Und Korrosion,59(10),819-824.
MLA	Q. Wen,et al."The effect of phosphate on MAO of AZ91D magnesium using AC power source".Materials and Corrosion-Werkstoffe Und Korrosion 59.10(2008):819-824.