Effects of pH on the electrochemical behaviour of titanium alloys for implant applications

被引:0
|
作者
Maria E. P. Souza
Lonetá Lima
Carmo R. P. Lima
Cecília A. C. Zavaglia
Célia M. A. Freire
机构
[1] State University of Campinas––UNICAMP,Department of Materials Engineering
来源
Journal of Materials Science: Materials in Medicine | 2009年 / 20卷
关键词
Titanium Alloy; Electrochemical Impedance Spectroscopy; Barrier Layer; Passive Film; Open Circuit Potential;
D O I
暂无
中图分类号
学科分类号
摘要
The electrochemical behaviour of two commercial titanium alloys Ti-6Al-4 V (ASTM F136) and Ti-13Nb-13Zr (ASTM F1713) was investigated in Ringer physiological solution at two pH values (5.5 and 7.0). The corrosion properties were examined by using electrochemical techniques: Potentiodynamic anodic polarization, cyclic polarization and electrochemical impedance spectroscopy (EIS). The electrochemical corrosion properties of both alloys at different conditions were measured in terms of corrosion potential (Ecorr), corrosion current density (icorr) and passivation current density (ipass). Equivalent electrical circuits were used to modulate EIS data, in order to characterize alloys surface and better understanding the pH effect on the interface alloy/solution.
引用
收藏
页码:549 / 552
页数:3
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