Influence of neodymium on microstructure and corrosion behavior of Mg-8Li-3Al-2Zn alloy

被引：30
作者：
Gu, M. Y. [1 ,2 ]
Wei, G. L. [1 ,2 ]
Liu, W. C. [1 ,2 ]
Wu, G. H. [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 20240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Key State Lab Met Matrix Composite, Shanghai 20240, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2017年 / 68卷 / 04期
关键词：
MECHANICAL-PROPERTIES; AS-CAST; MAGNESIUM ALLOYS; NACL SOLUTION; ND; MG; AZ91; RESISTANCE; EXTRUSION; ADDITIONS;
D O I：
10.1002/maco.201609141
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Nd addition on microstructure and corrosion behavior of LAZ832 alloy was investigated by immersion test, electrochemical experiments, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The results indicate that Nd addition leads to the coarsening of grains and the improvement of corrosion resistance. Meanwhile, results of XPS demonstrate that the corrosion film of LAZ832 consists of Mg(OH)(2), while the corrosion film of the LAZ832-0.5Nd alloy is composed of Mg(OH)(2) and Nd2O3. The improvement of corrosion resistance is attributed to the purifying effects of Nd addition and the appearance of Nd2O3, which changes the structure of the corrosion film and inhibits the penetration of the detrimental anions. Finally, Nd addition improves the corrosion resistance of the alloy, but it doesn't change the corrosion mechanism of the alloy.
引用
收藏
页码：436 / 443
页数：8
相关论文
共 44 条
[1]   Analysis of the electrochemical reaction behavior of alloy AZ91 by EIS technique in H3PO4/KOH buffered K2SO4 solutions [J].
Anik, Mustafa ;
Celikten, Gizem .
CORROSION SCIENCE, 2007, 49 (04) :1878-1894
[2]   Role of alloyed Nd in the microstructure and atmospheric corrosion of as-cast magnesium alloy AZ91 [J].
Arrabal, R. ;
Mingo, B. ;
Pardo, A. ;
Matykina, E. ;
Mohedano, M. ;
Merino, M. C. ;
Rivas, A. ;
Maroto, A. .
CORROSION SCIENCE, 2015, 97 :38-48
[3]   Corrosion behaviour of AZ91D and AM50 magnesium alloys with Nd and Gd additions in humid environments [J].
Arrabal, R. ;
Matykina, E. ;
Pardo, A. ;
Merino, M. C. ;
Paucar, K. ;
Mohedano, M. ;
Casajus, P. .
CORROSION SCIENCE, 2012, 55 :351-362
[4]   Effect of Nd on the corrosion behaviour of AM50 and AZ91D magnesium alloys in 3.5 wt.% NaCl solution [J].
Arrabal, R. ;
Pardo, A. ;
Merino, M. C. ;
Mohedano, M. ;
Casajus, P. ;
Paucar, K. ;
Garces, G. .
CORROSION SCIENCE, 2012, 55 :301-312
[5]   Review of Recent Developments in the Field of Magnesium Corrosion [J].
Atrens, Andrej ;
Song, Guang-Ling ;
Liu, Ming ;
Shi, Zhiming ;
Cao, Fuyong ;
Dargusch, Matthew S. .
ADVANCED ENGINEERING MATERIALS, 2015, 17 (04) :400-453
[6]   Advances in Mg corrosion and research suggestions [J].
Atrens, Andrej ;
Song, Guang-Ling ;
Cao, Fuyong ;
Shi, Zhiming ;
Bowen, Patrick K. .
JOURNAL OF MAGNESIUM AND ALLOYS, 2013, 1 (03) :177-200
[7]   Effect of homogenization treatment on microstructure evolution and the distributions of RE and Zr elements in various Mg-Li-RE-Zr alloys [J].
Bao, Lei ;
Le, Qichi ;
Zhang, Zhiqiang ;
Cui, Jianzhong ;
Li, Qinxue .
JOURNAL OF MAGNESIUM AND ALLOYS, 2013, 1 (02) :139-144
[8]   Corrosion behaviour of stressed magnesium alloys [J].
Bonora, PL ;
Andrei, M ;
Eliezer, A ;
Gutman, EM .
CORROSION SCIENCE, 2002, 44 (04) :729-749
[9]   Corrosion of ultra-high-purity Mg in 3.5% NaCl solution saturated with Mg(OH)2 [J].
Cao, Fuyong ;
Shi, Zhiming ;
Hofstetter, Joelle ;
Uggowitzer, Peter J. ;
Song, Guangling ;
Liu, Ming ;
Atrens, Andrej .
CORROSION SCIENCE, 2013, 75 :78-99
[10]   Susceptibility of rare-earth-magnesium alloys to micro-galvanic corrosion [J].
Coy, A. E. ;
Viejo, F. ;
Skeldon, P. ;
Thompson, G. E. .
CORROSION SCIENCE, 2010, 52 (12) :3896-3906
12345