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Superhydrophobic ZnO thin film modified by stearic acid on copper substrate for corrosion and fouling protections

  • Original Paper: Sol-gel and hybrid materials with surface modification for applications
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Abstract

In the present study, a two-stage process was used to create hydrophobic and anti-fouling thin films on copper substrates. Initially, zinc oxide (ZnO) thin film was deposited on the copper substrate via a sol-gel method. Then, the film was modified with stearic acid. The structure and morphology of the thin films were characterized through X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and Fourier transform infrared (FTIR) spectroscopy. The water contact angle on the film surface was investigated by a water contact angle analyzer. Potentiodynamic polarization and salt spray tests were used to study the corrosion behavior of the copper and coated copper samples. Also, the antifouling properties of the thin films were investigated. Based on the FE-SEM result, the zinc oxide nanoparticle size was obtained as 60 nm. The water contact angle on the copper and coated copper samples increased from 39° to 155°. The corrosion current densities of the copper and coated copper samples were reduced from 1.31 μA/cm2 to 2.7 × 10−3 μA/cm2. In addition, the thin film showed the antifouling effect.

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Authors and Affiliations

  1. Department of Materials Engineering, Malek Ashtar University of Technology, Shiraz, Iran

    Milad Abdolahzadeh Saffar, Akbar Eshaghi & Mohammad Reza Dehnavi

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  1. Milad Abdolahzadeh Saffar
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  2. Akbar Eshaghi
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  3. Mohammad Reza Dehnavi
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Correspondence to Akbar Eshaghi.

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Saffar, M.A., Eshaghi, A. & Dehnavi, M.R. Superhydrophobic ZnO thin film modified by stearic acid on copper substrate for corrosion and fouling protections. J Sol-Gel Sci Technol 101, 672–682 (2022). https://doi.org/10.1007/s10971-022-05749-5

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  • DOI: https://doi.org/10.1007/s10971-022-05749-5

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