Electrochemical behavior of near-beta titanium biomedical alloys in phosphate buffer saline solution

被引：29
作者：
Dalmau, A. [1 ]
Guinon Pina, V. [1 ]
Devesa, F. [2 ]
Amigo, V. [2 ]
Igual Munoz, A. [1 ]
机构：
[1] Univ Politecn Valencia, Inst Ind Radiophys & Environm Safety, E-46071 Valencia, Spain
[2] Univ Politecn Valencia, Inst Mat Technol, E-46071 Valencia, Spain
来源：
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS | 2015年 / 48卷
关键词：
Near-beta titanium alloys; Passivation; Biomaterials; Corrosion; Electrochemical impedance spectroscopy (EIS); NB-SN ALLOYS; AGING HEAT-TREATMENT; TI-NB; MECHANICAL-PROPERTIES; PHYSIOLOGICAL SOLUTION; POWDER-METALLURGY; PASSIVE FILM; CORROSION BEHAVIOR; MICROSTRUCTURE; IMPLANTS;
D O I：
10.1016/j.msec.2014.11.036
中图分类号：
TB3 [工程材料学]; R318.08 [生物材料学];
学科分类号：
0805 ; 080501 ; 080502 ;
摘要：
The electrochemical behavior of three different near-beta titanium alloys (composed by Ti, Nb and Sn) obtained by powder metallurgy for biomedical applications has been investigated. Different electrochemical and microscopy techniques were used to study the influence of the chemical composition (Sn content) and the applied potential on the microstructure and the corrosion mechanisms of those titanium alloys. The addition of Sn below 4 wt% to the titanium powder improves the microstructural homogeneity and generates an alloy with high corrosion resistance with low elastic modulus, being more suitable as a biomaterial. When the Sn content is above 4%, the corrosion resistance considerably decreases by increasing the passive dissolution rate; this effect is enhanced with the applied potential. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：55 / 62
页数：8
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