Abstract
The electrochemical impedance spectroscopy was used for monitoring the formation of surface film on a fixtured sintering porous NiTi biomedical alloy in simulated body fluid (SBF) media during 12 days. Effect of NiTi sintering time on the formation of surface film in SBF was investigated. The formed surface film was calcium phosphate hydrate (CPH) with a pillar particulate structure which was developed to a spongy network with increasing the sintering time. Using such electrochemical techniques, it was shown that NiTi samples obtained after 3 h sintering at 950 °C, have higher tendency for the formation of a stable CPH film during the test.
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