Influence of casting module on corrosion behavior of Mg-11Gd-3Y alloy

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	Influence of casting module on corrosion behavior of Mg-11Gd-3Y alloy
	X. B. Liu; D. Y. Shan; Y. W. Song; R. S. Chen; E. H. Han
	2011
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	21 期号:4 页码:903-911
摘要	The influences of two kinds of casting modules of metal casting (MC) and expandable pattern casting (EPC) on the corrosion behavior of Mg-11Gd-3Y alloy were studied by electrochemical measurements, scanning electron microscopy (SEM) observation, X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. It is found that the quantity of the Mg(24) (Gd, Y)(5) phase in MC is more than that in EPC due to the cooling rate. There is more alloying element dissolved in the matrix compared with MC. For EPC, the galvanic corrosion effect between the matrix and the Mg(24) (Gd, Y)(5) phase decreases and the corrosion resistance increases compared with the MC. The chief corrosion mode for Mg-11Gd-3Y alloy is pitting corrosion because most of the alloying elements are transformed into intermetallic phases. The average corrosion rate of the MC alloy in the immersion test is five times higher than that of EPC alloy and yttrium is present in the product film, which will provide increased protection for Mg-11Gd-3Y alloy. The electrochemical measurements and immersion test show that the EPC process increases the corrosion resistance compared with the MC Mg-11Gd-3Y alloy.
部门归属	[liu xian-bin; shan da-yong; song ying-wei; chen rong-shi; han en-hou] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;shan, dy (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;dyshan@imr.ac.cn
关键词	Mg-11gd-3y Alloy Corrosion Behavior Casting Module Expandable Pattern Casting Metal Casting Az91 Magnesium Alloy Mechanical-properties Microstructure Resistance Metal Zr
URL	查看原文
WOS记录号	WOS:000290515800032
引用统计	被引频次：8[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/321006/30543
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. B. Liu,D. Y. Shan,Y. W. Song,et al. Influence of casting module on corrosion behavior of Mg-11Gd-3Y alloy[J]. Transactions of Nonferrous Metals Society of China,2011,21(4):903-911.
APA	X. B. Liu,D. Y. Shan,Y. W. Song,R. S. Chen,&E. H. Han.(2011).Influence of casting module on corrosion behavior of Mg-11Gd-3Y alloy.Transactions of Nonferrous Metals Society of China,21(4),903-911.
MLA	X. B. Liu,et al."Influence of casting module on corrosion behavior of Mg-11Gd-3Y alloy".Transactions of Nonferrous Metals Society of China 21.4(2011):903-911.