Corrosion behaviour of AZ91D and AM50 magnesium alloys with Nd and Gd additions in humid environments

被引：116

作者：

Arrabal, R. ^{[1
]}

Matykina, E. ^{[1
]}

Pardo, A. ^{[1
]}

Merino, M. C. ^{[1
]}

Paucar, K. ^{[2
]}

Mohedano, M. ^{[1
]}

Casajus, P. ^{[1
]}

机构：

[1] Univ Complutense Madrid, Fac Ciencias Quim, Dept Ciencia Mat, E-28040 Madrid, Spain

[2] Univ Nacl Ingn, Fac Ingn Quim & Text, Lima, Peru

来源：

CORROSION SCIENCE | 2012年 / 55卷

关键词：

Magnesium; Rare earth elements; Weight loss; Atmospheric corrosion; ATMOSPHERIC CORROSION; MECHANICAL-PROPERTIES; WATER-VAPOR; MICROSTRUCTURE; RESISTANCE; NEODYMIUM; ALUMINUM; XPS;

D O I：

10.1016/j.corsci.2011.10.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

AM50 and AZ91D alloys modified with rare earths (RE) were evaluated under atmospheric conditions. Nd and Gd additions resulted in formation of Al2RE and Al-Mn-RE compounds and reduction of the fraction of beta-phase. According to surface potential maps, RE-containing intermetallics were more noble than the beta-phase, but less than Al-Mn inclusions. As a result, the action of micro-galvanic couples depended on the added amount of RE and the initial alloy microstructure. Nd or Gd additions improved the corrosion resistance of the AM50 alloy by up to 43%, but had no significant effect on the corrosion resistance of the AZ91D alloy. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：351 / 362

页数：12

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