Corrosion resistance tests on NiTi shape memory alloy

被引：205

作者：

Rondelli, G

机构：

[1] CNR-ITM, 20133 Milano

来源：

BIOMATERIALS | 1996年 / 17卷 / 20期

关键词：

shape memory alloys; corrosion resistance tests;

D O I：

10.1016/0142-9612(95)00352-5

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The corrosion performances of NiTi shape memory alloys (SMA) in human body simulating fluids were evaluated in comparison with other implant materials. As for the passivity current in potentiostatic conditions, taken as an index of ion release, the values are about three times higher for NiTi than for Ti6Al4V and austenitic stainless steels. Regarding the localized corrosion, while plain potentiodynamic scans indicated for NiTi alloy good resistance to pitting attack similar to Ti6Al4V, tests in which the passive film is abruptly damaged (i.e. potentiostatic scratch test and modified ASTM F746) pointed out that the characteristics of the passive film formed on NiTi alloy (whose strength can be related to the alloy's biocompatibility) are not as good as those on Ti6Al4V but are comparable or inferior to those on austenitic stainless steels. (C) 1996 Elsevier Science Limited.

引用

页码：2003 / 2008

页数：6

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