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<p>Hip joint degeneration is a major cause of disability worldwide, driving the need for durable implant materials with superior corrosion resistance. Titanium (Ti) alloys are widely used in orthopedic applications, yet long-term performance can be limited by electrochemical degradation in physiological environments. In this work, the influence of Mo and Ta additions on the corrosion behavior of Ti–10Zr–2Sn alloys was investigated. Three compositions—Ti–10Zr–2Sn–2Ta–6Mo, Ti–10Zr–2Sn–4Ta–4Mo, and Ti–10Zr–2Sn–6Ta–2Mo—were fabricated and evaluated in 3.5% NaCl solution using current–time response, electrochemical impedance spectroscopy, and cyclic polarization. All alloys exhibited improved passivation with extended exposure time (1–48&#xa0;h), attributed to the growth of protective oxide layers. Among them, Ti–10Zr–2Sn–4Ta–4Mo demonstrated the highest polarization resistance and stability, with no evidence of pitting observed by SEM/EDS. These findings highlight the promise of tailored Ti–Zr–Sn–Ta–Mo alloys for orthopedic implants, offering improved corrosion resistance and potentially longer clinical lifetimes.</p>

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Corrosion-resistant Ti–Zr–Sn–Ta–Mo alloys with enhanced passivation for orthopedic implant applications

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  • 发表日期：

    2026年7月16日

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  • El-Sayed M. Sherif,
  • Ibrahim A. Alnaser,
  • Hassan Alshehri,
  • Ahmed Fouly

摘要

Hip joint degeneration is a major cause of disability worldwide, driving the need for durable implant materials with superior corrosion resistance. Titanium (Ti) alloys are widely used in orthopedic applications, yet long-term performance can be limited by electrochemical degradation in physiological environments. In this work, the influence of Mo and Ta additions on the corrosion behavior of Ti–10Zr–2Sn alloys was investigated. Three compositions—Ti–10Zr–2Sn–2Ta–6Mo, Ti–10Zr–2Sn–4Ta–4Mo, and Ti–10Zr–2Sn–6Ta–2Mo—were fabricated and evaluated in 3.5% NaCl solution using current–time response, electrochemical impedance spectroscopy, and cyclic polarization. All alloys exhibited improved passivation with extended exposure time (1–48 h), attributed to the growth of protective oxide layers. Among them, Ti–10Zr–2Sn–4Ta–4Mo demonstrated the highest polarization resistance and stability, with no evidence of pitting observed by SEM/EDS. These findings highlight the promise of tailored Ti–Zr–Sn–Ta–Mo alloys for orthopedic implants, offering improved corrosion resistance and potentially longer clinical lifetimes.