Corrosion behavior of AZ91 magnesium alloy treated by plasma immersion ion implantation and deposition in artificial physiological fluids

被引:107
作者
Liu, Chenglong [1 ]
Xin, Yunchang [1 ,2 ]
Tian, Xiubo [1 ,3 ]
Chu, Paul K. [1 ]
机构
[1] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
[2] Tsing Hua Univ, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
[3] Harbin Inst Technol, Sch Mat Sci & Engn, State Key Lab Welding Prod Technol, Harbin 15001, Peoples R China
关键词
magnesium alloy; plasma immersion ion implantation and deposition; corrosion; physiological fluid;
D O I
10.1016/j.tsf.2007.05.048
中图分类号
T [工业技术];
学科分类号
08 [工学];
摘要
Due to the good biocompatibility and tensile yield strength, magnesium alloys are promising in degradable prosthetic implants. The objective of this study is to investigate the corrosion behavior of surgical AZ91 magnesium alloy treated by aluminum, zirconium, and titanium plasma immersion ion implantation and deposition (PIII&D) at 10 kV in artificial physiological fluids. The surface layers show a characteristic intermixed layer and the outer surface are mainly composed of aluminum, zirconium or titanium oxide with a lesser amount of magnesium oxide. Comparing the three sets of samples, aluminum PIII&D significantly shifts the open circuit potential (OCP) to a more positive potential and improves the corrosion resistance at OCP. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:422 / 427
页数:6
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