Investigation of Superhydrophobic and Anticorrosive Epoxy Films with Al2O3 Nanoparticles on Different Surfaces

In this study, superhydrophobic epoxy coatings were preparedondifferent surfaces by utilizing hydrophobized aluminum oxide (Al2O3) nanoparticles. The dispersions containing epoxyand inorganic nanoparticles with different contents were coated onglass, galvanized steel, and skin-passed galvanized steel substratesby the dip coating method. The contact angles of the obtained surfaceswere measured via a contact angle meter device, and the surface morphologieswere analyzed by utilizing scanning electron microscopy (SEM). Thecorrosion resistance was performed in the corrosion cabinet. The surfacesshowed superhydrophobic properties with high contact angles greaterthan 150 degrees and self-cleaning properties. SEM images indicatedthat the surface roughness increased as the concentration increasedby the incorporation of Al2O3 nanoparticlesinto epoxy surfaces. The increase in surface roughness was supportedby atomic force microscopy analysis on glass surfaces. It was determinedthat the corrosion resistance of the galvanized and skin-passed galvanizedsurfaces increased with the increase of Al2O3 nanoparticle concentration. It has been shown that red rust formationon skin-passed galvanized surfaces was reduced, although they havelow corrosion resistance due to roughening on their surfaces.

Automated summary

Superhydrophobic epoxy coatings were prepared on different surfaces using hydrophobized aluminum oxide (Al2O3) nanoparticles. The contact angles of the obtained surfaces were measured, and the surface morphologies were analyzed. The corrosion resistance of the surfaces was also tested. The results showed that the surfaces exhibited superhydrophobic properties with high contact angles and self-cleaning properties. The incorporation of Al2O3 nanoparticles increased the surface roughness, and the corrosion resistance improved with higher nanoparticle concentrations.