Influence of microstructure on the corrosion of diecast AZ91D

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	Influence of microstructure on the corrosion of diecast AZ91D
	G. L. Song ; A. Atrens ; M. Dargusch
刊名	Corrosion Science
	1999
卷号	41 期号:2 页码:249-273
关键词	magnesium alloys AZ91D diecasting corrosion microstructure magnesium alloys
ISSN号	0010-938X
中文摘要	The corrosion of die cast AZ91D was studied and related to its microstructure. For comparison and to more fully understand the behaviour of die cast AZ91D, corrosion studies and microstructural examinations were also carried out using slowly solidified high purity AZ91, Mg-2%Al, Mg-9%Al, low purity magnesium and high purity magnesium. Corrosion was studied in 1N NaCl at pH 11 by (1) observing the corrosion morphology, (2) measuring electrochemical polarisation curves and (3) simultaneously measuring both the hydrogen evolution rate and the magnesium dissolution rate. The skin of die cast AZ91D showed better corrosion resistance than the interior. This is attributed to a combination of(1) a higher volume fraction of the beta phase, (2) a more continuous beta phase distribution around finer alpha grains, and (3) lower porosity in the skin layer than in the interior of the die casting. This study showed that the casting method can influence the corrosion performance by its influence on the alloy microstructure. (C) 1999 Elsevier Science Ltd. All rights reserved.
原文出处	://WOS:000078779000003
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/37483]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	G. L. Song,A. Atrens,M. Dargusch. Influence of microstructure on the corrosion of diecast AZ91D[J]. Corrosion Science,1999,41(2):249-273.
APA	G. L. Song,A. Atrens,&M. Dargusch.(1999).Influence of microstructure on the corrosion of diecast AZ91D.Corrosion Science,41(2),249-273.
MLA	G. L. Song,et al."Influence of microstructure on the corrosion of diecast AZ91D".Corrosion Science 41.2(1999):249-273.