About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thin Films and Coatings: Properties, Processing and Applications
|
| Presentation Title |
Electrolytic Co-Deposition and Performance Evaluation of Bi-Layered Zn/Zn-ZnO–CaCO3 Composite Coatings on Mild Steel for Enhanced Corrosion Resistance in Marine Environments |
| Author(s) |
David Esezobor, Ruth Nkiruka Nnaji, Muideen Bodude |
| On-Site Speaker (Planned) |
David Esezobor |
| Abstract Scope |
Mild steel's susceptibility to corrosion in marine environments, especially under subsurface exposure to chlorides and microbes, limits its durability. This study presents bi-layered Zn/Zn-ZnO–CaCO₃ composite coatings fabricated via electrolytic co-deposition to enhance corrosion resistance. CaCO₃ nanoparticles were synthesized from periwinkle and eggshell biowastes, incorporated into a zinc matrix in varying ratios (0–100 wt%) to form functionally graded coatings. The Zn base layer provided sacrificial protection, while the Zn-ZnO–CaCO₃ top layer acted as a physical barrier and bioactive interface. Optimal performance was recorded at 90% periwinkle/10% eggshell CaCO₃, with a corrosion rate of 0.05 mm/year and polarization resistance over 8300 Ω. Electrochemical (Tafel, EIS, EFM) and microbial tests showed effective corrosion and biocorrosion suppression. SEM/EDS and XRD confirmed uniform coating morphology and protective phase formation. The findings validate the use of eco-friendly, biogenic fillers for developing multifunctional marine coatings with enhanced durability and antimicrobial resistance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Composites, Surface Modification and Coatings |