Corrosion evaluation of Ti-48Al-2Cr-2Nb (at.%) in Ringer's solution

被引：51
作者：
Delgado-Alvarado, C. [1 ]
Sundaram, P. A. [1 ]
机构：
[1] Univ Puerto Rico, Dept Mech Engn, Mayaguez, PR 00680 USA
来源：
ACTA BIOMATERIALIA | 2006年 / 2卷 / 06期
关键词：
titanium alloy; oxidation; corrosion; Ringer's solution;
D O I：
10.1016/j.actbio.2006.05.012
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
The corrosion behavior of Ti-48Al-2Cr-2Nb (at.%) in Ringer's solution was studied to evaluate its potential as a biocompatible material. Corrosion properties of Ti-6Al-4V were determined under the same conditions for comparison. Two electrochemical techniques, potentiodynamic anodic polarization and electrochemical impedance spectroscopy, were employed to test Ti-48Al-2Cr-2Nb and Ti-6Al-4V. Surface modifications to the samples were made by autoclaving and by oxidation in air at 500 degrees C and 800 degrees C. The results show excellent corrosion resistance for unmodified Ti-48Al-2Cr-2Nb, corroborated by the high values of polarization resistance and corrosion potential and low values of corrosion current and corrosion rate. Ti-48Al-2Cr-2Nb appears to possess corrosion characteristics similar to Ti-6Al-4V. Surface modification rendered the Ti-48Al-2Cr-2Nb material extremely corrosion resistant. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：701 / 708
页数：8
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