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Citation: LI Song-Mei, ZHOU Si-Zhuo, LIU Jian-Hua. Fabrication and Anti-Corrosion Property of In situ Self-Assembled Super-Hydrophobic Films on Aluminum Alloys[J]. Acta Physico-Chimica Sinica, ;2009, 25(12): 2581-2589. doi: 10.3866/PKU.WHXB20091214 shu

Fabrication and Anti-Corrosion Property of In situ Self-Assembled Super-Hydrophobic Films on Aluminum Alloys

1.
Key Laboratory of Aerospace Materials and Performance of the Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China

Received Date: 15 July 2009
Available Online: 3 November 2009

In situ rough structures on an aluminum alloy were formed by anodic oxidation method. After siloxane self-assembly on the rough structures, super-hydrophobic and self-cleaning films were fabricated. The static contact angle of the super-hydrophobic surface with a water drop was 157.5°±2.0° at its maximum and the contact angle hysteresis was less than 3°. The influence of anodic oxidation current density, the water content of the siloxane solution, and self-assembly time on filmformation were studied by Fourier transforminfrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), atomic force microscopy (AFM) and contact angle measurements. Optimum parameters to fabricate the super-hydrophobic surface were obtained. FE-SEM and AFM results indicated that microstructures were obtained by anodic oxidation and nanostructures were obtained by the disorder of self-assembly film. Stable super-hydrophobic surfaces were produced by the cooperation of micro/nano-structures and the low surface free energy of the siloxane films. The electrochemical measurement (potentiodynamic polarization) indicated that the anti-corrosion property of the aluminumalloy was greatly improved by the in situ super-hydrophobic film.
- Super-hydrophobic,
- In situ,
- Self-assembly,
- Siloxane,
- Anti-corrosion property
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