PREPARATION AND CHARACTERIZATION OF SUPER-HYDROPHOBIC SURFACES ON ALUMINUM AND STAINLESS STEEL SUBSTRATES

Zhijia Yu (), Yuefei Yu, Yanfeng Li, Shanpeng Song, Subin Huo and Xiuyan Han
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Zhijia Yu: School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
Yuefei Yu: School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
Yanfeng Li: School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
Shanpeng Song: School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
Subin Huo: School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
Xiuyan Han: School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China

Surface Review and Letters (SRL), 2010, vol. 17, issue 03, 375-381

Abstract: Hierarchical alveolate structures in nano- to microscale were fabricated on both aluminum and stainless steel substrates via a chemical etching. On aluminum surfaces, sharp edged caves and plateaus were found. On stainless steel substrate, fine papillae stand on protuberances. These surfaces exhibit super-hydrophobic properties after the fluorination treatment, their water contact angles are 158° and 160°, respectively, with the contact angle hysteresis of about 5°. The roll off angle is about 5°. Ice melting behaviors on a plate of aluminum super-hydrophobic surface were compared with those on a hydrophilic one, their difference shows that the new feature of super-hydrophobic surface could be expected.

Keywords: Super-hydrophobicity; chemical etching; micro- and nanostructure; aluminum; stainless steel (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X10014132

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