Enhanced Surface Properties and In Vitro Corrosion Tests of Ti─Nb─Sn Coating on CoCrMo Alloy for Biomedical Applications

Çakır M. A.

Plasma Processes and Polymers, cilt.23, sa.4, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 23 Sayı: 4
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1002/ppap.70168
  • Dergi Adı: Plasma Processes and Polymers
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
  • Anahtar Kelimeler: CoCrMo, PBS, potentiodynamic polarization test, Ti─Nb─Sn thin films, wear test
  • Erzincan Binali Yıldırım Üniversitesi Adresli: Evet

Özet

Ti–Nb–Sn thin films were deposited onto CoCrMo alloy substrates by magnetron sputtering to enhance surface properties for biomedical applications. Structural and compositional analyses revealed a dense, crack-free, columnar coating with a sharp interface. Potentiodynamic polarization tests in PBS demonstrated a significant improvement in corrosion resistance, with approximately 70% reduction in corrosion current density and more than 10-fold increase in polarization resistance compared to the uncoated alloy. Wear tests under dry and PBS conditions showed that the Ti─Nb─Sn coating reduced the wear rate by more than five times, indicating enhanced wear performance. In vitro cytotoxicity assessments using MTT and LDH assays confirmed high cell viability, indicating non-cytotoxic behavior. Overall, the Ti─Nb─Sn coating offers an effective surface modification strategy for CoCrMo-based biomedical implants.