Corrosion Resistance and Biological Behavior Evaluation for Bioactive / Bioinert Coated on 316L Stainless Steel by EPD

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Document Type : Original Article

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Department of metallurgy -university of technology-Baghdad- iraq

Abstract

This study demonstrates the successful electrophoretic deposition (EPD) of hydroxyapatite (HA) and calcia-stabilized zirconia (CSZ) biocomposite coatings on 316L stainless steel. The investigation focused on varying CSZ concentrations (1–3 wt%) while maintaining a fixed HA concentration of 3 g/L to evaluate their effects on coating properties. Comprehensive characterization was performed using adhesion strength testing, cyclic polarization, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results showed that increasing CSZ content significantly enhanced coating performance. The deposited layers were uniform, crack-free, and exhibited high crystallinity, contributing to improved corrosion resistance and mechanical stability. Coating thickness increased with CSZ content, from 9.26 µm at 1% CSZ to 14.34 µm at 3% CSZ. Additionally, higher CSZ concentrations led to improved adhesion strength and reduced contact angle, indicating better surface wettability. These findings highlight the potential of CSZ incorporation in HA-based coatings as a strategy to improve the electrochemical behavior and durability of stainless steel for biomedical implant applications.

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Progress in Color, Colorants and Coatings

Articles in Press, Accepted Manuscript
Available Online from 26 April 2025

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