SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 67 ›› Issue (3): 89-96.DOI: 10.1016/j.cjche.2023.11.021

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Enhanced corrosion resistance of epoxy resin coating via addition of CeO2 and benzotriazole

Xu Han1, Ruijie Guo1,2, Baolong Niu1,2, Hong Yan1,2   

  1. 1 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
    2 Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
  • 收稿日期:2023-03-19 修回日期:2023-09-17 出版日期:2024-03-28 发布日期:2024-06-01
  • 通讯作者: Ruijie Guo,E-mail address:guoruijie@tyut.edu.cn;Hong Yan,E-mail address:yanhong@tyut.edu.cn.
  • 基金资助:
    The work was financially supported by the National Natural Science Foundation of China (22178242) and the Shanxi Provincial Key Research and Development Project (202102040201009).

Enhanced corrosion resistance of epoxy resin coating via addition of CeO2 and benzotriazole

Xu Han1, Ruijie Guo1,2, Baolong Niu1,2, Hong Yan1,2   

  1. 1 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
    2 Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2023-03-19 Revised:2023-09-17 Online:2024-03-28 Published:2024-06-01
  • Contact: Ruijie Guo,E-mail address:guoruijie@tyut.edu.cn;Hong Yan,E-mail address:yanhong@tyut.edu.cn.
  • Supported by:
    The work was financially supported by the National Natural Science Foundation of China (22178242) and the Shanxi Provincial Key Research and Development Project (202102040201009).

摘要: The use of fillers to enhance the corrosion protection of epoxy resins has been widely applied. In this work, cerium dioxide (CeO2) and benzotriazole (BTA) were introduced into an epoxy resin to enhance the corrosion resistance of Q235 carbon steel. Scanning electron microscopy results indicated that the CeO2 grains were rod-like and ellipsoidal in shape, and the distribution pattern of BTA was analyzed by energy dispersive spectroscope. The dynamic potential polarization curve proved the excellent corrosion resistance of the composite epoxy resin with CeO2 and BTA co-addition, and electrochemical impedance spectroscopy test analysis indicated the significantly enhanced long-term corrosion protection performance of the composite coating. And the optimal protective performance was provided by the coating containing≥0.3% (mass) CeO2 and 20% (mass) BTA, which was attributed to the barrier performance of CeO2 particles and the chemical barrier effect of BTA. The formation of corrosion products was analyzed using X-ray diffraction. In addition, the corrosion resistance mechanism of the coating was also discussed in detail.

关键词: Benzotriazole, Cerium dioxide, Corrosion resistance, Carbon steel, Epoxy resin coating, Preparation

Abstract: The use of fillers to enhance the corrosion protection of epoxy resins has been widely applied. In this work, cerium dioxide (CeO2) and benzotriazole (BTA) were introduced into an epoxy resin to enhance the corrosion resistance of Q235 carbon steel. Scanning electron microscopy results indicated that the CeO2 grains were rod-like and ellipsoidal in shape, and the distribution pattern of BTA was analyzed by energy dispersive spectroscope. The dynamic potential polarization curve proved the excellent corrosion resistance of the composite epoxy resin with CeO2 and BTA co-addition, and electrochemical impedance spectroscopy test analysis indicated the significantly enhanced long-term corrosion protection performance of the composite coating. And the optimal protective performance was provided by the coating containing≥0.3% (mass) CeO2 and 20% (mass) BTA, which was attributed to the barrier performance of CeO2 particles and the chemical barrier effect of BTA. The formation of corrosion products was analyzed using X-ray diffraction. In addition, the corrosion resistance mechanism of the coating was also discussed in detail.

Key words: Benzotriazole, Cerium dioxide, Corrosion resistance, Carbon steel, Epoxy resin coating, Preparation