In this research, nanostructured polymer-metal oxide composite coatings are applied on the copper substrate via the tape casting method to decrease and even eliminate the corrosion of metal industries. The effects of ZnO, Al2O3, TiO2, and CuO on the phase behavior, as well as the structural properties and the corrosion behavior of the polymeric composite coatings, are investigated using the X-ray diffraction (XRD), the field emission scanning electron microscopy (FESEM), the transmission electron microscopy (TEM), and the electrochemical impedance spectroscopy (EIS). According to the obtained results, the superior corrosion protective properties of the polymer-metal oxide nanocomposite coating system are attributed to the mixture of two factors. The first contributor is the good adhesion of the nano oxide to the metal substrate. The second one is the homogeneity and uniformity of the coating and good dispersion of the nanoparticles in the polymeric matrix owing to the effective surfactants with hydrophobic and hydrophilic heads and tails. These two factors are satisfied in the polymer-10%ZnO and polymer-10% ZnO-10% Al2O3 composites.
