Author/Authors :
Ranjbar، Z. نويسنده , , Ashhari، Sh. نويسنده M. Sc., Department of Surface Coatings and Corrosion, Institute for Color Science and Technology(ICST), P.O. Box: 16765-654, Tehran, Iran. , , Jannesari، A. نويسنده Assistant Professor, Department of Resins and Additives, Institute for Color Science and Technology(ICST), P.O. Box: 16765-654, Tehran, Iran. , , Montazeri، Sh. نويسنده Ph.D. Student, Department of Surface Coatings and Corrosion, Institute for Color Science and Technology(ICST), P.O. Box: 16765-654, Tehran, Iran. ,
Abstract :
In this study, a series of epoxy/silica nanocomposites were prepared by using nano silica particles which had different surface modifications. The morphology of the nanocomposite coatings was characterized by scanning electron microscopy (SEM). The effects of the hydrophilic and hydrophobic feature of the nano particles on the Tg and anticorrosive properties of nanocomposite coatings were evaluated by DSC and EIS instruments. It was observed that the presence of the hydrophobic nano silica particles affected the curing and cross linking density of the organic coatings and consequently reduction in corrosion resistance of nanocomposite coatings. On the other hand, hydrophilic nano composite coatings showed better corrosion resistance even after 60 days immersion in 3.5% NaCl solution in comparison to pure epoxy coating. Prog. Color Colorants Coat. 6(2013), 119-128. © Institute for Color Science and Technology.
