Electrophoretic deposition of 63S bioglass coatings on LPBF-fabricated CoCrW alloy: Deposition parameter effects on surface wettability and corrosion behavior in artificial saliva
Ceramics International, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.ceramint.2026.10.065
- Dergi Adı: Ceramics International
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Bioactive glass coating, Corrosion resistance, Electrophoretic deposition, Surface wettability
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Atatürk Üniversitesi Adresli: Evet
Özet
Electrochemical degradation and limited long-term surface stability remain critical challenges for cobalt-based alloys exposed to aggressive oral environments. In this study, the influence of electrophoretic deposition (EPD) parameters on the surface chemistry, wettability, mechanical stability, and corrosion behavior of 63S bioactive glass coatings deposited on laser powder bed fusion (LPBF)-fabricated CoCrW alloys was systematically investigated.The results demonstrate that deposition voltage and time strongly influence coating morphology, composition, microstructure, adhesion-related mechanical stability, and electrochemical performance. EPD-derived bioglass coatings exhibited a distinct transition from hydrophobic behavior to dynamic superhydrophilicity, governed by capillary-driven liquid infiltration into the porous coating structure.Electrochemical and scratch test results revealed that performance does not increase monotonically with increasing wettability or coating thickness. Instead, an optimal condition was identified at 12 V for 20 min, where a compact and homogeneous coating exhibited the highest impedance response, superior adhesion-related mechanical stability, and minimal post-corrosion surface degradation, indicating enhanced coating integrity and overall electrochemical performance.These findings indicate that the performance of LPBF-fabricated CoCrW alloys depends on achieving an optimal balance between coating continuity, microstructural integrity, mechanical stability, and controlled electrolyte accessibility rather than simply maximizing coating thickness. Optimized electrophoretic deposition enables the formation of a compact, superhydrophilic bioglass coating with improved electrochemical performance and coating integrity, providing valuable insight into the optimization of bioactive glass coatings for LPBF-fabricated CoCrW alloys.