The Effect of Zirconia and Ceria Nanoparticles in the Hybrid Nanocomposites Coatings on the Copper Corrosion Protection

Sol-gel processes are widely used in the preparation of environmental friendly hybrid nanocomposite coatings. In our pervious studies, the hybrid silica based nanocomposite coatings have been investigated for corrosion protection of 1050 aluminum alloys and the effect of silica content in the hybrid composition was also studied. In this study, the hybrid sols were prepared by hydrolysis and condensation of 3-glicidoxypropyl-trimethoxysilane (GPTMS) in the presence of an acidic catalyst, Bisphenol A (BPA) as cross-linking agent and 1 methyl imidazol as iniatiator. Additionally, the various ratios of ceria and zirconia nanoparticles was doped in the hybrid sol. The metal substrates were coated by spin coatings technique. The shape and size of the nano particles in the hybrid films were observed and determined using a transmission electron microscopy (TEM). The chemical composition and the structure of the nanocomposite hybrid coatings were studied by X-ray photoelectron spectroscopy and scanning electron microscopy (SEM), respectively. The evolution of the corrosion protection roperties of the hybrid coatings was studied by EIS (electrochemical impedance spectroscopy), which can provide quantitative information on the role of the different pretreatments.

کلیدواژه ها:

Zirconia ، Nanoparticle ، Coating ، Corrosion Protection