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A smart anticorrosion coating based on hollow silica nanocapsules with inorganic salt in shells

Journal of Coatings Technology and Research volume 14, pages 85–94 (2017)Cite this article

Abstract

This work presents the synthesis of corrosion inhibitor [1H-benzotriazole (BTA)]-loaded hollow silica nanocapsules with magnesium hydroxide precipitate in the shells (HSNs-M/BTA) through inverse microemulsion (W/O) polymerization. TEM and Brunauer–Emmett–Teller (BET) measurements indicate that the silica nanocapsules possess voids in the inner part and mesoporous on the surface. The actual loading capacity of BTA is 287.17 mg (BTA)/1 g (HSNs-M/BTA). The results of UV absorption spectra show that the release of BTA can be triggered by the changing of pH in the corrosion solution. The anticorrosive SiO x /ZrO x coatings embedded with hydrophobically modified HSNs-M have a better waterproof performance since the water contact angle can reach 140°. In comparison to the passive SiO x /ZrO x coatings with or without BTA, the enhanced corrosion protection performance of this developed anticorrosive system was observed by both electrochemical impedance spectroscopy and Tafel analysis. The fabrication of nanocapsules with corrosion inhibitors is promising as an intelligent element in protective coatings in the future.

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Acknowledgment

This work was supported by the National Natural Science Foundation of China (No: 51302253).

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Authors and Affiliations

  1. Center of Composite Material and Surface Treatment, China Electronic Technology Group Corporation No.38 Research Institute (CETC 38), Hefei, 230031, Anhui, People’s Republic of China

    Dong Zhao & Dongguang Liu

  2. School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei, 230009, People’s Republic of China

    Zhijia Hu

Authors
  1. Dong Zhao
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  2. Dongguang Liu
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  3. Zhijia Hu
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Correspondence to Dongguang Liu or Zhijia Hu.

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Zhao, D., Liu, D. & Hu, Z. A smart anticorrosion coating based on hollow silica nanocapsules with inorganic salt in shells. J Coat Technol Res 14, 85–94 (2017). https://doi.org/10.1007/s11998-016-9830-4

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  • DOI: https://doi.org/10.1007/s11998-016-9830-4

Keywords

  • Corrosion resistance
  • Silica nanocapsules
  • Corrosion inhibitor
  • Sol–gel coatings
  • Aluminum