Corrosion of hot extrusion AZ91 magnesium alloy. Part II: Effect of rare earth element neodymium (Nd) on the corrosion behavior of extruded alloy

被引：195
作者：
Zhang, Tao [1 ,2 ]
Meng, Guozhe [1 ,2 ]
Shao, Yawei [1 ,2 ]
Cui, Zhongyu [1 ]
Wang, Fuhui [1 ,2 ]
机构：
[1] Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Corros & Protect Lab, Harbin 150001, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Magnesium; Rare earth elements; SEM; TEM; EIS; Anodic dissolution; MICRO-ARC OXIDATION; ELECTROCHEMICAL-BEHAVIOR; MECHANICAL-PROPERTIES; CONVERSION COATINGS; PURE MAGNESIUM; RESISTANCE; MICROSTRUCTURE; IMPROVEMENT; CERIUM;
D O I：
10.1016/j.corsci.2011.05.035
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behavior of extruded Nd-free AZ91 and extruded AZ91 + 1.5Nd alloy was investigated by weight loss and electrochemical measurements. The results showed that the extruded A291 + 1.5Nd alloy had higher corrosion resistance compared to the extruded Nd-free AZ91 alloy, which could been explained from point of view of microstructure changes: (1) the significant decrease of twins and dislocation decreased the anodic dissolution rate; (2) the micro-galvanic corrosion was inhibited by the formation of Al(3)Nd phase; and (3) Nd not only increased the percent of Non-Faraday process, but also led to anisotropic feature on the corrosion mechanism. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2934 / 2942
页数：9
相关论文
共 36 条
[1]   Corrosion resistance of WE43 and AZ91D magnesium alloys with phosphate PEO coatings [J].
Arrabal, R. ;
Matykina, E. ;
Viejo, F. ;
Skeldon, P. ;
Thompson, G. E. .
CORROSION SCIENCE, 2008, 50 (06) :1744-1752
[2]   Effect of grain size and twins on corrosion behaviour of AZ31B magnesium alloy [J].
Aung, Naing Naing ;
Zhou, Wei .
CORROSION SCIENCE, 2010, 52 (02) :589-594
[3]   An impedance investigation of the mechanism of pure magnesium corrosion in sodium sulfate solutions [J].
Baril, Genevieve ;
Galicia, Gonzalo ;
Deslouis, Claude ;
Pebere, Nadine ;
Tribollet, Bernard ;
Vivier, Vincent .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (02) :C108-C113
[4]   The relation between microstructure and corrosion behavior of AZ80 Mg alloy following different extrusion temperatures [J].
Ben-Haroush, M. ;
Ben-Hamu, G. ;
Eliezer, D. ;
Wagner, L. .
CORROSION SCIENCE, 2008, 50 (06) :1766-1778
[5]   A combined neural network and mechanistic approach for the prediction of corrosion rate and yield strength of magnesium-rare earth alloys [J].
Birbilis, N. ;
Cavanaugh, M. K. ;
Sudholz, A. D. ;
Zhu, S. M. ;
Easton, M. A. ;
Gibson, M. A. .
CORROSION SCIENCE, 2011, 53 (01) :168-176
[6]   On the corrosion of binary magnesium-rare earth alloys [J].
Birbilis, N. ;
Easton, M. A. ;
Sudholz, A. D. ;
Zhu, S. M. ;
Gibson, M. A. .
CORROSION SCIENCE, 2009, 51 (03) :683-689
[7]   Effect of HCl pre-treatment on corrosion resistance of cerium-based conversion coatings on magnesium and magnesium alloys [J].
Brunelli, K ;
Dabalà, M ;
Calliari, I ;
Magrini, M .
CORROSION SCIENCE, 2005, 47 (04) :989-1000
[8]   Effect of heat treatment on corrosion and electrochemical behaviour of Mg-3Nd-0.2Zn-0.4Zr (wt.%) alloy [J].
Chang, Jian-Wei ;
Guo, Xing-Wu ;
Fu, Peng-Huai ;
Peng, Li-Ming ;
Ding, Wen-Jiang .
ELECTROCHIMICA ACTA, 2007, 52 (09) :3160-3167
[9]   AC impedance spectroscopy study of the corrosion behavior of an AZ91 magnesium alloy in 0.1 M sodium sulfate solution [J].
Chen, Jian ;
Wang, Jianqiu ;
Han, Enhou ;
Dong, Junhua ;
Ke, Wei .
ELECTROCHIMICA ACTA, 2007, 52 (09) :3299-3309
[10]   Investigation of corrosion behaviors of Mg-6Gd-3Y-0.4Zr alloy in NaCl aqueous solutions [J].
Guo, Xing-Wu ;
Chang, Jian-Wei ;
He, Shang-Ming ;
Ding, Wen-Jiang ;
Wang, Xishu .
ELECTROCHIMICA ACTA, 2007, 52 (07) :2570-2579
1234