Abstract
The present findings support the significance of epoxy nanocomposites in the protection of AA3105 aluminum by Na- montmorillonite (Na-MMT)/CoFe2O4 nanopowder. In this work, crystalline CoFe2O4 nanoparticles and Na- MMT/CoFe2O4 nanopowder were synthesized by using coprecipitation method and doping method, respectively. The structural properties of CoFe2O4, Na- MMT nanoparticles and Na-MMT/CoFe2O4 nanopowder were investigated by using X-ray diffraction (XRD) technique, ultraviolet-visible spectroscopy and Fourier transform infrared (FTIR) spectroscopy Therefore, the epoxy nanocomposite coatings, containing various amounts of Na-MMT/ CoFe2O4 nanoparticles were coated on the surface of an AA3105 aluminum specimen. The effects of addition of nanopowder on the resistance of the coating against corrosion of AA3105 aluminum in 3.5% NaCl solution were studied by electrochemical techniques (potentiodynamic polarization and electrochemical impedance spectroscopy (EIS)). Impedance and potentiodynamic polarization testing results, evidenced the improvement of the protection feature of the coatings against corrosion in the presence of the formulations with superior anticorrosion of EC80. The morphology and composition of the films were probed by FE- SEM and EDS.
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