In this study, superhydrophobic epoxy coatings were prepared
on
different surfaces by utilizing hydrophobized aluminum oxide (Al2O3) nanoparticles. The dispersions containing epoxy
and inorganic nanoparticles with different contents were coated on
glass, galvanized steel, and skin-passed galvanized steel substrates
by the dip coating method. The contact angles of the obtained surfaces
were measured via a contact angle meter device, and the surface morphologies
were analyzed by utilizing scanning electron microscopy (SEM). The
corrosion resistance was performed in the corrosion cabinet. The surfaces
showed superhydrophobic properties with high contact angles greater
than 150° and self-cleaning properties. SEM images indicated
that the surface roughness increased as the concentration increased
by the incorporation of Al2O3nanoparticles
into epoxy surfaces. The increase in surface roughness was supported
by atomic force microscopy analysis on glass surfaces. It was determined
that the corrosion resistance of the galvanized and skin-passed galvanized
surfaces increased with the increase of Al2O3nanoparticle concentration. It has been shown that red rust formation
on skin-passed galvanized surfaces was reduced, although they have
low corrosion resistance due to roughening on their surfaces.