Influence on Transitional Rare Earth Metal Composite on the Ternary Based Sulphate Rich Coatings

Pure zinc coatings have been widely reported for surface modification on metallic materials for industrial applications. However their major setbacks are their average anticorrosive properties and instability at high-temperature applications. In this study, an attempt was made to incorporate MoO2 into sulphate bath to produce a ternary Zn-Ni-MoO2 coating at varied voltage. The microstructural characteristics of these produced series composite coatings were investigated using scanning electron microscope coupled with energy dispersive spectroscopy (SEM-EDS). The corrosion degradation properties in 3.5% NaCl medium were studied using potentiodynamic polarization technique and characterized with Optical Microscope. The average micro-hardness and thermal properties were determined with diamond based Vickers hardness tester and isothermal furnace at 350 ˚C respectively. The study revealed that the obtained coating provided enhanced thermal stability characteristics, improved morphology and corrosion resistance.