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Enhanced corrosion resistance and self-healing effect of sol–gel coating incorporating one-pot-synthesized corrosion inhibitor-encapsulated silica nanocontainers

  • Original Paper: Functional coatings, thin films and membranes (including deposition techniques)
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Abstract

Integration of corrosion inhibitor-loaded nanocontainers into sol–gel-derived anticorrosion coatings presents a promising strategy to endow them with self-healing ability and improve their long-term corrosion protection properties. In the present work, we demonstrate the preparation of sol–gel anticorrosion coating incorporating benzotriazole-loaded SiO2 mesoporous nanocontainers (BTA@SiO2) synthesized via a modified one-pot method. The nanocontainers exhibited suitable mesoporous structures and pH-dependent inhibitor release properties. Salt spray tests and EIS analysis on the nanocontainer-containing sol–gel coating indicated enhanced corrosion protection properties owing to the high compatibility of the silica skeleton of the nanocontainers with the sol–gel coating matrix, as well as the formation of inhibitive layer on the metal surface.

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Highlights

  • Corrosion inhibitor-loaded silica nanocontainers were prepared via an one-pot approach.

  • The nanocontainers showed satisfactory mesoporous structures and pH-dependent release behavior.

  • The nanocontainer-doped sol–gel coating exhibited enhanced corrosion protection properties.

  • The silica nanocontainer shell provides better compatibility with coating matrix, thus creating less defects.

  • The inhibitive layer formed by the nanocontainers suppressed the corrosion process at coating defects.

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Acknowledgements

This work was supported by the Zhejiang Provincial Natural Science Foundation of China (Grant No. LQ20E020008), by the Open Project of State Key Lab of Silicon Materials, Zhejiang University (SKL2020-11), by the Fundamental Research Funds for the Central Universities (K20220175), and by the Guangxi Department of Science and Technology-Zhejiang University Science, Technology and Innovation Cooperation Project (No. ZD20302002).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Yi Huang, Chenyang Zhao, Yue Li, Chen Wang, Tao Shen, Chunchun Wu & Hui Yang

  2. State Key Lab of Silicon Materials, Zhejiang University, Hangzhou, 310027, China

    Yue Li & Hui Yang

  3. Institute of Wenzhou, Zhejiang University, Wenzhou, 325006, China

    Yue Li, Zhongyuan Hu & Hui Yang

  4. Zhejiang California International Nanosystems Institute, Zhejiang University, Hangzhou, 310058, China

    Di Cheng & Hui Yang

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  1. Yi Huang
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Huang, Y., Zhao, C., Li, Y. et al. Enhanced corrosion resistance and self-healing effect of sol–gel coating incorporating one-pot-synthesized corrosion inhibitor-encapsulated silica nanocontainers. J Sol-Gel Sci Technol 104, 78–90 (2022). https://doi.org/10.1007/s10971-022-05929-3

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