China Petroleum Processing & Petrochemical Technology ›› 2023, Vol. 25 ›› Issue (1): 44-53.

• Scientific Research • Previous Articles     Next Articles

2D Co2(OH)2BDC-HNTs nanocomposite-reinforced epoxy coating with outstanding corrosion resistance

Zhao Huarong; Zhang Yueshuang; Cheng Zhilin   

  1. School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
  • Received:2022-06-23 Revised:2022-08-16 Online:2023-03-30 Published:2023-03-30
  • Contact: cheng zhilin

Abstract: Introducing inorganic nanomaterials into a polymer matrix greatly improves the anticorrosion performance of epoxy coatings(EP); however, poor compatibility between the materials can limit the improvement in properties. In this work, based on the high interface compatibility of two-dimensional (2D) Co2(OH)2BDC (BDC = 1,4-benzenedicarboxylate) in the epoxy coating that we reported in previous work, we fabricated a 2D Co2(OH)2BDC-halloysite nanotube (HNT) nanocomposite have a structure consisting of alternating of nanosheets and nanotube by in situ synthesis. The nanocomposite was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. The mechanical and anticorrosion performance of the 2D Co2(OH)2BDC-HNT/EP coating was evaluated by mechanical tests and electrochemical impedance spectroscopy spectra. Compared with a conventional unreinforced epoxy coating, the 2D Co2(OH)2BDC-HNT/EP coating had higher mechanical strength and toughness, and the low-frequency impedance modulus of 2D Co2(OH)2BDC-HNT/EP coating was increased by three orders of magnitude, demonstrating the high corrosion resistance of our reinforced coating.

Key words: Composite materials, 2D Co2(OH)2BDC, HNTs, EP, Corrosion resistance