Enhanced Surface Properties and In Vitro Corrosion Tests of Ti─Nb─Sn Coating on CoCrMo Alloy for Biomedical Applications
Plasma Processes and Polymers, vol.23, no.4, 2026 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 23 Issue: 4
- Publication Date: 2026
- Doi Number: 10.1002/ppap.70168
- Journal Name: Plasma Processes and Polymers
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
- Keywords: CoCrMo, PBS, potentiodynamic polarization test, Ti─Nb─Sn thin films, wear test
- Erzincan Binali Yildirim University Affiliated: Yes
Abstract
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.