Corrosion Behavior of thixoformed AZ91D magnesium alloy in NaCl aqueous solution

	Corrosion Behavior of thixoformed AZ91D magnesium alloy in NaCl aqueous solution
	Xu, Weijun; Ma, Ying; Chen, Tijun; Hao, Yuan
	2007
关键词	thixoformed AZ91D alloy corrosion
卷号	353-358
页码	2611-2614
英文摘要	The corrosion behaviors of thixoformed AZ91D alloy immersed in 3.5% NaCl aqueous were studied by using the weight lose method and observed by scanning electron microscopy and analyzed by electron probe micro-analysis.The results showed that corrosion rate of thixoformed AZ91D alloy was higher in initial stages and decreased as the immersion time increased. Compared with the thixoformed alloy, the change of corrosion rate of permanent mould cast (PMC) alloy was smoothly. The observation on the corrosion surfaces showed that the primary alpha phase spherical particles were first suffered from corrosion during corrosion testing, and then the eutectic alpha grains. the composition of primary alpha phase particles in the thixoformed alloy was quite uniform, and thus the protective film of the corrosion products on the alloy surface was more intact. The amount of the eutectic beta phase in the inter-particle eutectics was relatively higher and the distribution was more uniform, so the protective film consisted by eutectic beta phase was also more intact. That is to say the protective role from the surface film on the thixoformed alloy was better than that on the PMC alloy which was the cause of lower corrosion rate of the thixoformed AZ91D alloy.
会议录	PROGRESSES IN FRACTURE AND STRENGTH OF MATERIALS AND STRUCTURES, 1-4
会议录出版者	TRANS TECH PUBLICATIONS LTD
会议录出版地	LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
语种	英语
WOS研究方向	Materials Science
WOS记录号	WOS:000252246301275
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/38111]
专题	材料科学与工程学院
通讯作者	Xu, Weijun
作者单位	Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Metal Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Xu, Weijun,Ma, Ying,Chen, Tijun,et al. Corrosion Behavior of thixoformed AZ91D magnesium alloy in NaCl aqueous solution[C]. 见:.