Three different approaches were applied to obtain textured superhydrophobic surfaces on Al6082 aluminium alloys (boiling water, HF/HCl and HNO3/HCl concentrated solution etching). Afterwards, a octadecylsilane thin film was deposited on all as-treated surfaces to reduce theirs surface energy. The morphological analysis showed that a specific dual nano/micro-roughness structure was obtained for each pre-treated surface. All samples evidenced a superhydrophobic behaviour, with water contact angle (WCA) in the range 160 degrees-180 degrees. The adhesion force between the water droplets and superhydrophobic surfaces were evaluated. The results evidenced that HF/HCl etched samples showed the lowest adhesion and highest WCA. Furthermore, the relationship among hydrophobic behaviour, corrosion resistance and surface morphology was discussed comprehensively.
