Electrodeposition of Zn-Graphite Oxide Nanocomposite Coatings on Stainless Steel from Sulfate Bath, its Surface Morphological and Corrosion Protection Studies

Abstract

Thin films of Zn-GO nanocomposites were prepared by electrodeposition in sulfate bath solution with different concentration of dispersed graphite oxide (GO) colloid. Various bath parameters were optimized to get the required morphology of the deposit and their effect on the morphology were studied. The micro morphologies of film were studied by scanning electron microscopy and energy dispersive X-ray analysis, to get information about metal lattice parameters, texture and phase composition of the coatings which dramatically changed from to nanocrystal sheets owing to the addition of graphite oxide. The corrosion resistance properties of Zn-GO composite coatings in HCl solution were investigated by electrochemical methods. The corrosion potential - E_corr and corrosion current density - I_corr have been determined as a measure of corrosion resistance. The nanocomposite coatings obtained from optimized bath parameters, showed better corrosion protective ability and surface properties.