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Metals 2018, 8(9), 687; https://doi.org/10.3390/met8090687

Superhydrophobic Film on Hot-Dip Galvanized Steel with Corrosion Resistance and Self-Cleaning Properties

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1
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
2
Key Lab for New Type of Functional Materials in Hebei Province, Tianjin 300130, China
3
Tianjin Key Lab Material Laminating Fabrication and Interface, Tianjin 300132, China
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Authors to whom correspondence should be addressed.
Received: 8 August 2018 / Revised: 26 August 2018 / Accepted: 27 August 2018 / Published: 31 August 2018
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Abstract

Super-hydrophobic film with hierarchical micro/nano structures was prepared by galvanic replacement reaction process on the surface of galvanized steel. The effects of the etching time and copper nitrate concentration on the wetting property of the as-prepared surfaces were studied. Scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and electrochemical technique were employed to characterize the surface morphology, chemical composition, and corrosion resistance. The stability and self-cleaning property of the as-fabricated super-hydrophobic film were also evaluated. The super-hydrophobic film can be obtained within 3 min and possesses a water contact angle of 164.3° ± 2°. Potentiodynamic polarization measurements indicated that the super-hydrophobic film greatly improved the corrosion resistance of the galvanized steel in 3.5 wt % NaCl aqueous solution. The highest inhibition efficiency was estimated to be 96.6%. The obtained super-hydrophobic film showed good stability and self-cleaning property. View Full-Text
Keywords: super-hydrophobic surface; hot-dip galvanized steel; anti-corrosion resistance; self-cleaning super-hydrophobic surface; hot-dip galvanized steel; anti-corrosion resistance; self-cleaning
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Li, C.; Ma, R.; Du, A.; Fan, Y.; Zhao, X.; Cao, X. Superhydrophobic Film on Hot-Dip Galvanized Steel with Corrosion Resistance and Self-Cleaning Properties. Metals 2018, 8, 687.

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