Effect of heat treatment on corrosion behaviour of magnesium alloy AZ91D in simulated body fluid

被引：217
作者：
Zhou, Wei [1 ]
Shen, Tian [1 ]
Aung, Naing Naing [1 ]
机构：
[1] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
来源：
CORROSION SCIENCE | 2010年 / 52卷 / 03期
关键词：
Alloy; Magnesium; Weight loss; Polarisation; Intergranular corrosion; IN-VIVO CORROSION; MG ALLOY; ELECTROCHEMICAL-BEHAVIOR; CHLORIDE-ION; MICROSTRUCTURE; TECHNOLOGY; PH;
D O I：
10.1016/j.corsci.2009.11.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The research explored ways of improving corrosion behaviour of AZ91D magnesium alloy through heat treatment for degradable biocompatible implant application. Corrosion resistance of heat-treated samples is studied in simulated body fluid at 37 degrees C using immersion and electrochemical testing. Heat treatment significantly affected microgalvanic corrosion behaviour between cathodic beta-Mg(17)Al(12) phase and anodic alpha-Mg matrix. In T4 microstructure, dissolution of the beta-Mg(17)Al(12) phase decreased the cathode-to-anode area ratio, leading to accelerated corrosion of alpha-Mg matrix. Fine beta-Mg(17)Al(12) precipitates in T6 microstructure facilitated intergranular corrosion and pitting, but the rate of corrosion was less than those of as-cast and T4 microstructures. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1035 / 1041
页数：7
相关论文
共 30 条
[1]   Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy [J].
Ambat, R ;
Aung, NN ;
Zhou, W .
CORROSION SCIENCE, 2000, 42 (08) :1433-1455
[2]   Electroless nickel-plating on AZ91D magnesium alloy: effect of substrate microstructure and plating parameters [J].
Ambat, R ;
Zhou, W .
SURFACE & COATINGS TECHNOLOGY, 2004, 179 (2-3) :124-134
[3]   Studies on the influence of chloride ion and pH on the corrosion and electrochemical behaviour of AZ91D magnesium alloy [J].
Ambat, R ;
Aung, NN ;
Zhou, W .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 2000, 30 (07) :865-874
[4]  
ASTM, ASTM G31-72
[5]   Effect of heat treatment on corrosion and electrochemical behaviour of AZ91D magnesium alloy [J].
Aung, NN ;
Zhou, W .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 2002, 32 (12) :1397-1401
[6]   Plasma electrolytic oxidation of AZ91D magnesium alloy with different additives and its corrosion behavior [J].
Cao, F. H. ;
Cao, J. L. ;
Zhang, Z. ;
Zhang, J. Q. ;
Cao, C. N. .
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, 2007, 58 (09) :676-683
[7]   Effect of laser surface melting on corrosion behaviour of AZ91D Mg alloy in simulated-modified body fluid [J].
Guan, Y. C. ;
Zhou, Wei ;
Zheng, H. Y. .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 2009, 39 (09) :1457-1464
[8]   Biocorrosion of magnesium alloys: a new principle in cardiovascular implant technology? [J].
Heublein, B ;
Rohde, R ;
Kaese, V ;
Niemeyer, M ;
Hartung, W ;
Haverich, A .
HEART, 2003, 89 (06) :651-656
[9]   Precipitation control of calcium phosphate on pure magnesium by anodization [J].
Hiromoto, Sachiko ;
Shishido, Tamao ;
Yamamoto, Akiko ;
Maruyama, Norio ;
Somekawa, Hidetoshi ;
Mukai, Toshiji .
CORROSION SCIENCE, 2008, 50 (10) :2906-2913
[10]   The initial steps of atmospheric corrosion on magnesium alloy AZ91D [J].
Jonsson, Martin ;
Persson, Dan ;
Gubner, Rolf .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (11) :C684-C691
123