Effect of Nd on the corrosion behaviour of AM50 and AZ91D magnesium alloys in 3.5 wt.% NaCl solution

被引：204

作者：

Arrabal, R. ^{[1
]}

Pardo, A. ^{[1
]}

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

Mohedano, M. ^{[1
]}

Casajus, P. ^{[1
]}

Paucar, K. ^{[2
]}

Garces, G. ^{[3
]}

机构：

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

[2] Univ Nacl Ingn, Fac Ingn Quim & Text, Lima, Peru

[3] Ctr Nacl Invest Met CSIC, Madrid 28040, Spain

来源：

CORROSION SCIENCE | 2012年 / 55卷

关键词：

Magnesium; Polarization; Weight loss; Pitting corrosion; MECHANICAL-PROPERTIES; PURE MAGNESIUM; MICROSTRUCTURE; RESISTANCE; PROTECTION; NEODYMIUM; CHLORIDE; OXIDES;

D O I：

10.1016/j.corsci.2011.10.033

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

The corrosion performance of AM50 and AZ91D alloys containing up to 1.5 wt.% Nd was investigated by electrochemical and gravimetric measurements in 3.5 wt.% NaCl at 22 degrees C. The alloys were characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and surface potential maps. In Nd-containing alloys, formation of Al2Nd and Al-Mn-Nd intermetallic compounds reduced the volume fraction and modified the morphology of the beta-Mg17Al12 phase. The addition of Nd improved the corrosion resistance of the alloys due to increased passivity of the surface film and suppression of micro-galvanic couples. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：301 / 312

页数：12

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