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Preparation of poly(o-toluidine)/nano ZrO2/epoxy composite coating and its application for corrosion protection of steel

Journal of Wuhan University of Technology-Mater. Sci. Ed. volume 31, pages 937–944 (2016)Cite this article

Abstract

The main objective was to study the anticorrosion performance of poly(o-toluidine)/nano ZrO2/epoxy composite coating. Poly(o-toluidine)/nano ZrO2 composite was prepared by in situ polymerization of o-toluidine monomer in the presence of nano ZrO2 particles. Fourier transformation infrared spectroscopy (FT-IR), UV-visible spectroscopy (UV-vis), X-ray diffraction (XRD), Scanning electron microscopy (SEM), and Thermogravimetric analysis (TGA) were used to characterize the composition and structure of the composite. Poly(o-toluidine)/nano ZrO2 composite was mixed with epoxy resin through a solution blending method and the three components poly(o-toluidine)/nano ZrO2/epoxy composite coating was coated onto the surface of steel sample by the brush coating method. The anticorrosion performance of poly(o-toluidine)/nano ZrO2/epoxy composite coating on steel sample was studied by polarization curve and electrochemical impendence spectroscopy in 3.5% NaCl solution as corrosion environment and also compared with that of poly(o-toluidine)/epoxy composite coating and pure epoxy coating. It was observed that the composite coating containing poly(o-toluidine)/nano ZrO2 composite has got higher corrosion protection ability than that of poly(o-toluidine). The electrochemical measurement results demonstrated that poly(o-toluidine) fillers improve the electrochemical anticorrosion performance of epoxy coating and the addition of nano ZrO2 particles increases the tortuosity of the diffusion pathway of corrosive substances.

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Authors and Affiliations

  1. College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China

    Chuanbo Hu  (胡传波), Yansheng Zheng  (郑燕升), Yongquan Qing, Falong Wang, Chunyan Mo & Qian Mo

  2. Lushan College, Guangxi University of Science and Technology, Liuzhou, 545616, China

    Yansheng Zheng  (郑燕升)

  3. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Chuanbo Hu  (胡传波) & Yongquan Qing

Authors
  1. Chuanbo Hu  (胡传波)
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  2. Yansheng Zheng  (郑燕升)
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  3. Yongquan Qing
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  4. Falong Wang
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  5. Chunyan Mo
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  6. Qian Mo
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Corresponding author

Correspondence to Yansheng Zheng  (郑燕升).

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Funded by the Innovation Project of Guangxi Graduate Education (No.YCSZ2014202)

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Hu, C., Zheng, Y., Qing, Y. et al. Preparation of poly(o-toluidine)/nano ZrO2/epoxy composite coating and its application for corrosion protection of steel. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 937–944 (2016). https://doi.org/10.1007/s11595-016-1471-z

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  • DOI: https://doi.org/10.1007/s11595-016-1471-z

Key words

  • anticorrosion performance
  • poly(o-toluidine)/nano ZrO2 composite
  • electrochemical measurement
  • tortuosity