Anticorrosion coating for magnesium alloys: electrospun superhydrophobic polystyrene/SiO2 composite fibers

Abstract

Superhydrophobic nanocomposite coatings for magnesium surfaces with remarkable corrosion resistance werefabricated by electrospinning in the presence of fluorosilane-functionalized silica (SiO2) nanoparticles. The effects ofsurface-modified silica (mod-SiO2) nanoparticles on the superhydrophobicity and corrosion resistance of polystyrene(PS)/mod-SiO2 fiber coatings were evaluated. The incorporation of the SiO2 nanoparticles endows PS fibers withrough surfaces exhibiting a water contact angle (WCA) of 165 ◦. The surface wettability, corrosion resistance, and theirrelation to the inorganic content in the PS fibers and the contact angle of the composite coatings were explored. Analysisof the corrosion results confirmed that the PS/mod-SiO2 coating protected the Mg surface from corrosion. In addition,PS fibers containing mod-SiO2 nanoparticles showed improved hydrophobicity, and excellent corrosion resistance wasachieved with PS fibers containing 4 wt% SiO2 nanoparticles.