Correlation between Galvanic Corrosion and Electronic Work Function of Al Alloy Surfaces

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	Correlation between Galvanic Corrosion and Electronic Work Function of Al Alloy Surfaces
	J. Wang; S. Q. Wang
	2014
发表期刊	Acta Physico-Chimica Sinica
ISSN	1000-6818
卷号	30 期号:3 页码:551-U208
摘要	Al alloys contain some secondary phases to improve their properties. These secondary phases have different potentials to the Al matrix, which greatly affect the localized corrosion of Al alloys. In order to reveal the physical nature of Al alloy corrosion, we use the first-principles method based upon density functional theory to calculate the work function of the main secondary phases ( Al2Cu, Al3Ti, and Al7Cu2Fe). The difficulty of electrons escaping from various crystal planes was analyzed, and the potential difference between the secondary phases and Al matrix was obtained. We find that different crystal planes exposed to the outmost layer significantly impacted on the potential difference. Different atomic types at the outmost layer play different roles in Al alloy corrosion, even for the same crystal surface. The causes of galvanic corrosion were thus revealed.
部门归属	[wang jian ; wang shao-qing] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wang jian] univ sci & technol china, sch chem & mat sci, hefei 230026, peoples r china. [wang jian] univ sci & technol liaoning, coll sci, anshan 114051, liaoning provin, peoples r china. ; wang, j (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; jwang12b@imr.ac.cn
关键词	Al Alloy Second Phase Electronic Work Function Galvanic Corrosion First-principles Probe Force Microscopy Aluminum-alloy Intermetallic Phases Localized Corrosion Magnesium Alloy Cu Alloy Behavior Mg Microstructure Aa2024-t3
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72583
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Wang,S. Q. Wang. Correlation between Galvanic Corrosion and Electronic Work Function of Al Alloy Surfaces[J]. Acta Physico-Chimica Sinica,2014,30(3):551-U208.
APA	J. Wang,&S. Q. Wang.(2014).Correlation between Galvanic Corrosion and Electronic Work Function of Al Alloy Surfaces.Acta Physico-Chimica Sinica,30(3),551-U208.
MLA	J. Wang,et al."Correlation between Galvanic Corrosion and Electronic Work Function of Al Alloy Surfaces".Acta Physico-Chimica Sinica 30.3(2014):551-U208.