Corrosion of friction stir welded magnesium alloy AM50

被引：90

作者：

Zeng, Rong-Chang ^{[1
]}

Chen, Jun ^{[1
]}

Dietzel, Wolfgang ^{[2
]}

Zettler, Rudolf ^{[2
]}

dos Santos, Jorge F. ^{[2
]}

Nascimento, M. Lucia ^{[3
]}

Kainer, Karl Ulrich ^{[2
]}

机构：

[1] Chongqing Univ Technol, Sch Mat Sci & Engn, Chongqing 400050, Peoples R China

[2] GKSS Forschungszentrum Geesthacht GmbH, D-21502 Geesthacht, Germany

[3] Tech Univ Berlin, Fachgebiet Werkstofftech, D-10623 Berlin, Germany

来源：

CORROSION SCIENCE | 2009年 / 51卷 / 08期

关键词：

Magnesium alloy; Iron; XPS; Polarization; Corrosion; HYDROGEN; AZ91;

D O I：

10.1016/j.corsci.2009.04.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure of a friction stir welded magnesium alloy AM50 was examined by means of optical light microscopy. The chemical composition, particularly the iron content, and morphology of the oxide film were analyzed and discerned via auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS). Corrosion behaviour of the welds and base materials were investigated by virtue of neutral salt spray tests and potentiodynamic polarization measurements in conventional cells and in a mini cell. The results demonstrate that minor increases in iron concentration as might be speculated to occur as a consequence of tool/work piece interaction during the welding process on the corrosion resistance of the weld can be ignored. The corrosion morphology was predominantly influenced by the distribution of the Mg17Al12 phase. Here, it was also found that the corrosion resistance of the friction stir weld varied in response to changes in the joint microstructure. (C) 2009 Elsevier Ltd. All rights reserved

引用

页码：1738 / 1746

页数：9

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