Stabilized zirconia has desirable properties including high hardness, high chemical stability and a thermal expansion coefficient close to metals. Therefore, in this study, zirconia-yttria-Benzotriazole hybrid based coatings were applied on the surface of AA2024 by sol-gel method. To this aim, zirconia and zirconia-yttria-Benzotriazole solutions synthesized by alkoxide precursors were applied on the surface by immersion process, and then heat treated at 150°C. Phase analysis, morphology and the chemical bond properties were investigated by GIXRD, FESEM and FTIR, respectively. Furthermore, corrosion properties were evaluated by electrochemical methods such as polarization and electrochemical impedance techniques in 3.5% NaCl solution. Results showed a homogeneous and crack free zirconia-yttria-Benzotriazole hybrid coating, which exhibited proper corrosion resistance.

In this study, a nano-composite ceramic titania-alumina coating with different percentages of Benzotriazole include 1.2%, 3.6%, 4.8% was synthesed by sol-gel process and then applied by immersion technique on the surface of Al 2024. Phase behavior structural properties and surface morphology was investigated by using XRD, FESEM, AFM, respectively, and also corrosion behaviour were evaluated by using the polarization and electrochemical impedance spectroscopy in a 3.5% NaCl solution. The maximum inhibition at concentrations of 3.6% Benzotriazole can be cuased to decrease corrosion current density of 0.006797 mA to 0.002523 mA. The results show uniform and homogeneous coverage and increase the corrosion resistance of aluminum, due to release Benzotriazole inhibitors in the concentration of 3.6% Benzotriazol, particularly.