Novel strategy in increasing stability and corrosion resistance for super-hydrophobic coating on aluminum alloy surfaces

A novel super-hydrophobic coating was prepared by chemical modification on the anodized aluminum alloy surface. The surface structure was characterized by water contact angle measurement, scanning electron microscopy (SEM), and the composition was measured by X-ray photoelectron spectroscopy (XPS). The corrosion behavior of the super-hydrophobic coating was evaluated by the polarization curve and the electrochemical impedance spectroscopy ( EIS). It was found that the static water contact angle on the surface of super-hydrophobic coating was as high as 167.7 +/- 1.2 degrees, and the sliding angle was 5 degrees. The super-hydrophobic coating resulted in excellent corrosion resistance property and the super-hydrophobic coating showed a good stability. (C) 2011 Elsevier B.V. All rights reserved.