Abstract
The stability of a suspension created through Electro Phoretic Deposition (EPD) relies on Zeta Potential (ZP), ensuring consistent surface charge for a uniform coating on implant materials like stainless steel. An experimental study using the Taguchi method determined the optimal Zeta Potential value for the EPD suspension consisting of Nano Chitason/SrCl2/MgO. The analysis revealed that SrCl2 has the most significant impact on the suspension’s ZP. Coating the stainless steel surface with specific concentrations of Chitosan, SrCl2, and MgO/hydroxyapatite was achieved through electrophoretic deposition (EPD), optimizing adhesion force and coating thickness using applied voltage, time, and temperature. The results demonstrated the effectiveness of the analysis in determining the optimum ZP value for various solutions prepared from different biomaterial particles.
Using electrophoretic deposition, a chitosan/strontium chloride/magnesium oxide/hydroxyapatite coating was developed on 316L stainless steel. Its corrosion resistance was studied using various techniques and compared to base 316L stainless steel using open-circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy. The results indicated that the presence of the coating layer primarily controlled corrosion resistance, as evaluated in simulated body fluid (SBF) and simulated mouth saliva (SMS). The maximum coating efficiencies were 95.5% and 98.5% for SBF and SMS, respectively, at higher coating thickness and adhesion force levels. It was concluded that the chitosan, strontium chloride, magnesium oxide, and hydroxyapatite coating are well-suited for biomedical applications, providing defense against mechanical and chemical attacks.
