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Effect of siloxane-modified polyacrylate on water uptake and anticorrosion mechanism of silicone–epoxy coatings

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Abstract

Silicone–epoxy coatings containing siloxane-modified polyacrylate (SMP) were prepared. The effects of SMP on the hydrophobicity and water uptake behavior and on the corrosion resistance provided by the coatings were examined using contact angle measurements, glass-transition temperatures, and electrochemical impedance spectroscopy. The water uptake behavior of silicone–epoxy coatings with higher SMP content decreased to a greater extent for coatings with higher hydrophobicity. The anticorrosion protection of 2024 Al-alloy by silicone–epoxy coatings containing SMP correlated well with their water uptake and hydrophobicity.

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Acknowledgments

The authors gratefully acknowledge support of this work by the National Nature Science Fund of China (51405391 and 51402238), Fundamental Research Foundation (JC201138) at Northwestern Polytechnical University, Aeronautical Science Foundation of China (2012ZD53053), Aerospace Technology Support Fund of China (2013-HT-XGD), Specialized Research Fund for the Doctoral Program of Higher Education of China (20126102120034), and the graduate starting seed fund of Northwestern Polytechnical University (Z2014116).

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Authors and Affiliations

  1. Advanced Material Test Center, School of Mechanics and Civil & Architecture, Northwestern Polytechnical University, Xi’an, 710129, China

    X. Yuan, Z. F. Yue, Z. Q. Liu, S. F. Wen, L. Li & T. Feng

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  1. X. Yuan
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  2. Z. F. Yue
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  3. Z. Q. Liu
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  5. L. Li
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Correspondence to X. Yuan or Z. F. Yue.

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Yuan, X., Yue, Z.F., Liu, Z.Q. et al. Effect of siloxane-modified polyacrylate on water uptake and anticorrosion mechanism of silicone–epoxy coatings. J Coat Technol Res 13, 123–132 (2016). https://doi.org/10.1007/s11998-015-9732-x

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  • DOI: https://doi.org/10.1007/s11998-015-9732-x

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