Journal
SURFACE AND INTERFACE ANALYSIS
Volume 44, Issue 4, Pages 439-444Publisher
WILEY
DOI: 10.1002/sia.3823
Keywords
aluminum alloy; corrosion resistance; superhydrophobic coating; electrochemical measurement
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Funding
- Science and Technology Key Foundation of Chongqing [CSTC, 2009 AC4045, 2010 AC 6072]
- Fundamental Research Fund for the Central Universities [CDJXS11102210]
- Third Stage of '211' Innovative Talent Training Project [S-09109]
- Chongqing University [2010121556]
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A superhydrophobic coating applied in corrosion protection was successfully fabricated on the surface of aluminum alloy by chemical etching and surface modification. The water contact angle on the surface was measured to be 161.2 degrees +/- 1.7 degrees with sliding angle smaller than 8 degrees, and the superhydrophobic coating showed a long service life. The surface structure and composition were then characterized by means of SEM and XPS. The electrochemical measurements showed that the superhydrophobic coating significantly improved the corrosion resistance of aluminum alloy. The superhydrophobic phenomenon of the prepared surface was analyzed with Cassie theory, and it was found that only about 6% of the water surface is in contact with the metal substrate and 94% is in contact with the air cushion. Copyright (C) 2011 John Wiley & Sons, Ltd.
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