Abstract
NiTi shape memory alloy presents interesting mechanical properties as surgical implants. However, due to its high amount of Ni which may dissolve and release toxic ions in human fluids, the medical use of this material is a great concern. We have developed a laser treatment which modifies the oxide layer and enhances uniform and localised corrosion resistance of NiTi alloy.
In this paper we further analysed the effect of this treatment with potentiostatic and AC impedance measurements in physiological Hank’s solution. We conclude that the laser treatment creates a stable passive film which results in improved corrosion resistance of this alloy.
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The authors would like to thank AMP Développement (France) for providing the NiTi samples.
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Villermaux, F., Nakatsugawa, I., Tabrizian, M. et al. Corrosion Kinetics of Laser Treated NiTi Shape Memory Alloy Biomaterials. MRS Online Proceedings Library 459, 477–482 (1996). https://doi.org/10.1557/PROC-459-477
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DOI: https://doi.org/10.1557/PROC-459-477