Corrosion Behavıor of Nickel-Titanium Alloy in Simulated Body Fluids

Authors : Büşra Dağ, Güray Kılınççeker

Pages : 819-826

Doi:10.21605/cukurovaumfd.1747377

View : 47 | Download : 64

Publication Date : 2025-12-29

Article Type : Research Paper

Abstract :Nitinol, a nickel–titanium alloy, is widely used as a biomaterial because of its strong biocompatibility, ease of processing, and stable mechanical performance. However, its interaction with body fluids such as sweat, saliva, and tissue fluid is critical, since even relatively mild biological environments can still lead to corrosion and metal-ion release. In this study, the corrosion behavior of Nitinol was investigated electrochemically at 37 °C to simulate human body temperature. A naturally formed passive oxide layer was detected on the alloy surface, and its stability varied depending on the solution. EIS measurements showed impedance values of 6.85 × 10⁵ ohm.cm² in Fusayama Meyer artificial saliva, 8.35 × 10⁵ ohm.cm² in PBS, and 3.82 × 10⁶ ohm.cm² in Hank’s solution. Potentiodynamic polarization results supported these findings. Overall, the passive film demonstrated the greatest stability and corrosion resistance in Hank’s artificial body fluid, indicating Nitinol’s strong suitability for long-term biomedical use.
Keywords : NiTinol, biyomalzeme, korozyon, EIS

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