Electrochemical characterisation of a PVD film of titanium on AISI 316L stainless steel

被引:27
作者
Khelfaoui, Y
Kerkar, M
Bali, A
Dalard, F
机构
[1] Ecole Natl Super Electrochim & Electrome Grenoble, Inst Natl Polytech Grenoble, Lab Electrochim & Phys Chim Mat & Interfaces, UMR 5631, F-38402 St Martin Dheres, France
[2] Ecole Natl Polytech, Lab Mat Environm, El Harrach Algers, Algeria
关键词
titanium; stainless steel; biocompatibility; electrochemistry; surfaces;
D O I
10.1016/j.surfcoat.2005.03.043
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Linear sweep voltammetry and electrochemical impedance spectroscopy techniques were used to study the electrochemical behaviour of a thin film of titanium deposited oil AIST 316L stainless steel by cathodic sputtering (PVD-physical vapour deposition). The aim was to evaluate one of the most important properties of an implant material, namely its corrosion rate. In order to simulate natural biological conditions, physiological serum (solution of NaCl 9 g L-1) at pH=6.3, thermostatically controlled at 37 degrees C) was used as the electrolyte. The voltammetry and electrochemical results obtained in this work show that the deposited film of titanium oil ATSI 316L is much more biocompatible than the AISI 316L stainless steel on it own, tested in the same experimental conditions. The titanium film has improved the passivity of the surface and the passive layer stayed stable with the immersion time. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:4523 / 4529
页数:7
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