investigation of corrosion protection properties of tio2-cdo nanocomposite coating prepared by sol-gel method on copper

Sol–gel nanocomposite coatings have been investigated for copper metal as a potential replacement for the hazardous and banned hexavalent chromate conversion coatings. tio2–cdo nanocomposite thin films were deposited on copper using the sol–gel method. the sol-gel coatings were prepared using a sol obtained by the hydrolysis and condensation of tetra-o-butyl titanate. they were doped with cadmium oxide inhibitor to provide active corrosion protection. the synthesized coatings were characterized by x-ray diffraction (xrd) and atomic force microscopy (afm). the anticorrosion performances of tio2-cdo nanocomposite coatings were investigated in 3.5% nacl solution by the potentiodynamic polarization technique tafle and electrochemical impedance spectroscopy (eis). the potential corrosion increases from -210 mv versus ag/agcl (3m) for uncoated copper to -202 mv versus ag/agcl (3m) for tio2-cdo nanocomposite-coated copper electrodes. the results of this study clearly ascertain that the tio2-cdo nanocomposite has outstanding potential to protect the copper against corrosion in a chloride environment.