Ceramics-Silikáty

Titanium has garnered significant attention as an implant material due to its favorable strength-to-weight ratio, high mechanical strength, excellent corrosion resistance, and superior biocompatibility. Understanding the corrosion rate of implant materials in simulated body fluids is crucial for assessing their long-term performance in biomedical applications. This study investigates the corrosion behavior of commercially pure titanium (CP-Ti) in Hank’s solution, a fluid composition that closely mimics the human physiological environment. Corrosion testing was performed using a three-electrode cell method, where CP-Ti samples were immersed in the test solution at room temperature and physiological temperature (37 °C, pH 6.8). Post-immersion surface morphology analysis was conducted using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) to examine surface changes. The results showed that CP-Ti exhibited an average corrosion rate of 8.136 × 10^⁻⁵ mm/year at room temperature and 7.691 × 10^⁻⁵ mm/year at 37 °C, indicating enhanced corrosion resistance under physiological conditions. Comparisons with literature data further confirmed that CP-Ti has lower corrosion rates than commonly used implant alloys such as Ti-13Nb, Co-28Cr-6Mo, and 316L stainless steel. Surface morphology analysis revealed uniform corrosion without pitting, consistent with the passive behavior of titanium. Overall, these findings suggest that CP-Ti is a promising material for biomedical applications due to its stable passive film and superior corrosion resistance at body temperature.