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http://dx.doi.org/10.5695/JKISE.2021.54.5.222

De-icing of the hydrophobic treated nanoporous anodic aluminum oxide layer  

Shin, Yeji (Department of Metallurgical Engineering, Pukyong National University)
Kim, Jinhui (Department of Metallurgical Engineering, Pukyong National University)
Shin, Dongmin (Department of Metallurgical Engineering, Pukyong National University)
Moon, Hyung-Seok (Energy Plant Group, Korea Institute of Industrial Technology)
Lee, Junghoon (Department of Metallurgical Engineering, Pukyong National University)
Publication Information
Journal of the Korean institute of surface engineering / v.54, no.5, 2021 , pp. 222-229 More about this Journal
Abstract
Icing causes various serious problems, where water vapor or water droplets adhere at cold conditions. Therefore, understanding of ice adhesion on solid surface and technology to reduce de-icing force are essential for surface finishing of metallic materials used in extreme environments and aircrafts. In this study, we controlled wettability of aluminum alloy using anodic oxidation, hydrophobic coating and lubricant-impregnation. In addition, surface porosity of anodized oxide layer was controlled to realize superhydrophilicity and superhydrophobicity. Then, de-icing force on these surfaces with a wide range of wettability and mobility of water was measured. The results show that the enhanced wettability of hydrophilic surface causes strong adhesion of ice. The hydrophobic coating on the nanoporous anodic oxide layer reduces the adhesion of ice, but the volume expansion of water during the freezing diminishes the effect. The lubricant-impregnated surface shows an extremely low adhesion of ice, since the lubricant inhibits the direct contact between ice and solid surface.
Keywords
De-Icing; Hydrophobic; Anodic Oxidation; Wettability;
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