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One-step electrochemical machining of superhydrophobic surfaces on aluminum substrates

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Abstract

A superhydrophobic surface on an aluminum substrate was fabricated by one-step electrochemical machining using the sodium chloride (NaCl) aqueous solution containing fluoroalkylsilane as the electrolyte. The resulting superhydrophobic surfaces showed a static water contact angle of 166° and a tilting angle of about 1°. The morphological features and chemical compositions were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), electron probe micro-analyzer (EPMA), and Fourier-transform infrared spectrometer (FTIR). It shows that the binary micrometer–nanometer-scale rough structures and the low surface energy coating were present on the aluminum surfaces. The resulting surfaces have good properties of anti-adhesion and self-cleaning. The durability of the superhydrophobic surfaces on aluminum substrates was also investigated. This preparation method is advantageous as it does not require acid electrolyte or a separate process to lower the surface energy, uses simple steps, and is environmental friendly and highly efficient.

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Acknowledgements

The authors thank the National Science Foundation of China (No. 90923022) for their financial support.

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Authors and Affiliations

  1. School of Mechanical Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China

    Jinlong Song, Wenji Xu & Yao Lu

Authors
  1. Jinlong Song
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  2. Wenji Xu
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  3. Yao Lu
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Correspondence to Wenji Xu.

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Song, J., Xu, W. & Lu, Y. One-step electrochemical machining of superhydrophobic surfaces on aluminum substrates. J Mater Sci 47, 162–168 (2012). https://doi.org/10.1007/s10853-011-5783-2

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  • DOI: https://doi.org/10.1007/s10853-011-5783-2

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