Correlation between the surface chemistry and the atmospheric corrosion of AZ31, AZ80 and AZ91D magnesium alloys

被引：122
作者：
Feliu, S., Jr. [2 ]
Pardo, A. [1 ]
Merino, M. C. [1 ]
Coy, A. E. [3 ]
Viejo, F. [3 ]
Arrabal, R. [3 ]
机构：
[1] Univ Complutense, Fac Quim, Dept Ciencia Mat, E-28040 Madrid, Spain
[2] CSIC, Ctr Nacl Invest Met, E-28040 Madrid, Spain
[3] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M60 1QD, Lancs, England
来源：
APPLIED SURFACE SCIENCE | 2009年 / 255卷 / 07期
关键词：
Magnesium/aluminium alloys; XPS; Corrosion; Humidity; CARBON-DIOXIDE; MG ALLOY; MG17AL12; PHASE; NACL; OXIDATION; MICROSTRUCTURE; TEMPERATURE; MECHANISMS; PRODUCTS; ALUMINUM;
D O I：
10.1016/j.apsusc.2008.10.095
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
X-ray photoelectron spectroscopy (XPS) was used in order to investigate the correlation between the surface chemistry and the atmospheric corrosion of AZ31, AZ80 and AZ91D magnesium alloys exposed to 98% relative humidity at 50 degrees C. Commercially pure magnesium, used as the reference material, revealed MgO, Mg(OH)(2) and tracers of magnesium carbonate in the air-formed film. For the AZ80 and AZ91D alloys, the amount of magnesium carbonate formed on the surface reached similar values to those of MgO and Mg(OH)(2). A linear relation between the amount of magnesium carbonate formed on the surface and the subsequent corrosion behaviour in the humid environment was found. The AZ80 alloy revealed the highest amount of magnesium carbonate in the air-formed film and the highest atmospheric corrosion resistance, even higher than the AZ91D alloy, indicating that aluminium distribution in the alloy microstructure influenced the amount of magnesium carbonate formed. (C) 2008 Elsevier B. V. All rights reserved.
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页码：4102 / 4108
页数：7
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