Mechanically robust superhydrophobic porous anodized AA5083 for marine corrosion protection

Given the widely usage and corrosion tendency of AA5083, it is crucial and highly desired to transform intrinsically hydrophilic AA5083 to be water-repellent superhydrophobicity. In this paper, we constructed porous anodized AA5083 and achieved superhydrophobicity by fluorosilane self-assembly. The surface topography, roughness and chemical compositions were investigated by SEM, AFM and XPS. The corrosion-resisting behavior was revealed by EIS, demonstrating prominent improvement of corrosion resistance. In addition, the superhydrophobic AA5083 exhibits ultralow adhesion force, excellent self-cleaning and mechanical stability. We greatly anticipate the construction of superhydrophobic surfaces with mechanical robustness on AA5083 will effectively broaden its promising applications.