Corrosion behaviour of magnesium/aluminium alloys in 3.5 wt.% NaCl

被引：547

作者：

Pardo, A. ^{[1
]}

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

Coy, A. E. ^{[1
]}

Arrabal, R. ^{[2
]}

Viejo, F. ^{[2
]}

Matykina, E. ^{[2
]}

机构：

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

[2] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M60 1QD, Lancs, England

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 03期

关键词：

magnesium; polarization; weight loss; corrosion;

D O I：

10.1016/j.corsci.2007.11.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion behaviour of commercial magnesium/aluminium alloys (AZ31, AZ80 and AZ91D) was investigated by electrochemical and gravimetric tests in 3.5 wt.% NaCl at 25 degrees C. Corrosion products were analysed by scanning electron microscopy, energy dispersive X-ray analysis and low-angle X-ray diffraction. Corrosion damage was mainly caused by formation of a Mg(OH)(2) corrosion layer. AZ80 and AZ91D alloys revealed the highest corrosion resistance. The relatively fine beta-phase (Mg17Al12) network and the aluminium enrichment produced on the corroded surface were the key factors limiting progression of the corrosion attack. Preferential attack was located at the matrix/beta-phase and matrix/MnAl intermetallic compounds interfaces. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：823 / 834

页数：12

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