Study of CeO2@ TiO2/ POM and CoFe2O4@ SiO2 / POM Composites as Highly Efficient Eco-friendly Anti-Corrosion Coating for 316 Stainless Steel

In this study, composite coatings based on metal phosphomolybdate (POM) core-shells were synthesized for enhancing and protecting Stainless Steel 316.The structures of CeO2@ TiO2/ POM and CoFe2O4@ SiO2 / POM particles were studied and confirmed via spectrophotometric measurements e.g., X-ray Diffraction (XRD) and Atomic Force Microscope (AFM), in addition to, Transmission and Scanning Electron microscopes (TEM & SEM).The Corrosion tests of the powder pigments of all composites, and epoxy-based paint films of CoFe2O4@SiO2 / POM were examined by Potentiodynamic Polarization Curve (Tafel), and electrochemical impedance spectroscopy (EIS) to evaluate the anticorrosion performance of the composites.The powder pigments and the paint films of the examined composites achieved good corrosion protection properties of the examined composites according to the electrochemical studies as follows: for powder pigment, Vanadyl -> Bismuth-> Manganese -> Zirconyl -POM/ CeO2@ TiO2 core-shell, and for paint films Zirconyl-> Vanadyl -> Bismuth-CoFe2O4@ SiO2 / POM.