Electrochemical investigation of the influence of laser surface melting on the microstructure and corrosion behaviour of ZE41 magnesium alloy - An EIS based study

被引：71

作者：

Banerjee, P. Chakraborty ^{[1
,2
]}

Raman, R. K. Singh ^{[1
,3
,4
]}

Durandet, Y. ^{[2
,5
]}

McAdam, G. ^{[6
]}

机构：

[1] Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia

[2] CAST Cooperat Res Ctr, Hawthorn, Vic 3122, Australia

[3] Monash Univ, Dept Mech, Clayton, Vic 3800, Australia

[4] Monash Univ, Dept Aerosp Engn, Clayton, Vic 3800, Australia

[5] Swinburne Univ Technol, IRIS, Hawthorn, Vic 3122, Australia

[6] Def Sci & Technol Org, Fishermans Bend, Vic 3207, Australia

来源：

CORROSION SCIENCE | 2011年 / 53卷 / 04期

关键词：

Magnesium; EIS; Polarisation; RESISTANCE; AZ91D;

D O I：

10.1016/j.corsci.2011.01.017

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Surface melting of a magnesium alloy, ZE41 (4%-Zn, 1%-RE) was performed to achieve electrochemical homogeneity at the surface by microstructure refinement. Large secondary precipitates are particularly known to cause severe pitting in magnesium alloys. The corrosion resistance of the laser treated and untreated alloy was investigated by potentiodynamic polarisation and electrochemical impedance spectroscopy. Contrary to the reported behaviour of other magnesium alloys (such as AZ series alloys), laser surface melting did not significantly improve the corrosion resistance of ZE41. This observation is attributed to the absence of beneficial alloying elements such as Al in ZE41 alloy. (c) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1505 / 1514

页数：10

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