Corrosion behaviour of extruded AM30 magnesium alloy under salt-spray and immersion environments

被引：71

作者：

Song, Weiwei ^{[1
]}

Martin, Holly J. ^{[1
]}

Hicks, Ayesha ^{[1
]}

Seely, Denver ^{[1
]}

Walton, Christopher A. ^{[1
]}

Lawrimore, William B., II ^{[1
]}

Wang, Paul T. ^{[1
]}

Horstemeyer, M. F. ^{[1
]}

机构：

[1] Mississippi State Univ, Ctr Adv Vehicular Syst, Mississippi State, MS 39762 USA

来源：

CORROSION SCIENCE | 2014年 / 78卷

关键词：

Magnesium; Alloy; Aluminium; Passive Films; Pitting Corrosion; ATMOSPHERIC CORROSION; PURE MAGNESIUM; AZ91; MG; QUANTIFICATION; CAST; MECHANISMS; MORPHOLOGY; CHLORIDE; FILMS;

D O I：

10.1016/j.corsci.2013.10.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanisms associated with general, pitting, and filiform corrosion were quantified at various intervals for extruded AM30 magnesium alloy exposed to a cyclical salt spray and immersion environment. The three mechanisms were quantified using optical microscopy, laser profilometry, and SEM coupled with EDX for over 60 h of testing. General corrosion and pitting corrosion were more severe in the immersion environment, and filiform corrosion was more severe in the salt-spray environment. The presence of a sodium ion (Na+) diffusion region around the edge of the corrosion pits functioned as cathodic sites, accelerating the localised pitting corrosion rates in immersion environment. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：353 / 368

页数：16

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