Abstract
AbstractIn this study, a superhydrophobic surface was successfully prepared on Al alloy 5052 using a simple anodic oxidation method followed by fluorination treatment. This study demonstrates the construction of rough structure of Al oxide by an anodic oxidation reaction, which improves the superhydrophobicity of the alloy. The top, tilt, and cross‐views of the samples were characterized by field‐emission scanning electron microscopy and focused ion beam. The chemical composition of the samples was analyzed by energy‐dispersive X‐ray spectroscopy and Fourier‐transform infrared spectroscopy. The structure of the surface was effectively modified as the anodization time increased. The optimum anodic oxidation reaction was carried out for 4 min in a 0.2‐M H3PO4 aqueous electrolyte at 50°C under a constant voltage of 120 V to create a pore‐and‐dendrite hybrid nanostructure. The water contact angle values were maximized in the hybrid nanostructure because their solid fraction area was smaller than that in the porous structure. Corrosion measurements proved that the superhydrophobic surface can significantly inhibit the corrosion of the substrate alloy with an inhibition efficiency of 99.99%. In addition, the prepared superhydrophobic sample exhibited good self‐cleaning properties.
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