Role of alloyed Nd in the microstructure and atmospheric corrosion of as-cast magnesium alloy AZ91

被引：82
|
作者：
Arrabal, R. [1 ]
Mingo, B. [1 ]
Pardo, A. [1 ]
Matykina, E. [1 ]
Mohedano, M. [2 ]
Merino, M. C. [1 ]
Rivas, A. [3 ]
Maroto, A. [3 ]
机构：
[1] Univ Complutense, Fac Ciencias Quim, Dept Ciencia Mat, E-28040 Madrid, Spain
[2] Helmholtz Zentrum Geesthacht, Magnesium Innovat Ctr, Inst Mat Res, D-21502 Geesthacht, Germany
[3] Fdn CIDAUT, Dept Aleac Ligeras, Valladolid 47151, Spain
来源：
CORROSION SCIENCE | 2015年 / 97卷
关键词：
A; Magnesium; Alloy; B; AFM; C. Atmospheric corrosion; MECHANICAL-PROPERTIES; BEHAVIOR; RESISTANCE; NEODYMIUM; AM50; IMPROVEMENT; ALUMINUM; GD;
D O I：
10.1016/j.corsci.2015.04.004
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Nd on the atmospheric corrosion performance of AZ91 alloy was evaluated as per PV1210 standard. Additionally, immersion and electrochemical measurements were carried out. The beneficial effect of Nd is associated with: (i) suppressed galvanic corrosion between alpha-Mg and secondary phases, (ii) refined beta-phase morphology and (iii) increased proportion of carbonates in the outer surface layer. In case of atmospheric corrosion, the role of beta-phase is the least important factor out of the three. The optimum Nd content is 0.5 wt.%. Further additions do not improve significantly the corrosion performance. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：38 / 48
页数：11
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