芳基磷酸酯盐改性石墨烯/水性环氧涂层的耐腐蚀性能研究

doi:10.11896/cldb.21110138

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Abstract In this work, in order to improve the dispersion and compatibility of graphene in aqueous epoxy resin (EP), graphene is modified by 2, 2′-methylene bis (4, 6-di-tert-butylphenol) sodium phosphate (NA-11). The modified graphene was dispersed in epoxy resin, and the curing agent was added to prepare graphene/epoxy coating. The scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (FTIR), AC impedance spectroscopy (EIS) and potentiodynamic polarization curve (Tafel) were used to analyze the structure and corrosion resistance of the composite coating. The obtained results show that NA-11 modified graphene has a high dispersibility in water and epoxy resin. The modified graphene can significantly improve the corrosion resistance of the composite coating, the initial impedance modulus (Z_{0.01 Hz}) increased from 445.7 kΩ·cm² to 5 047 kΩ·cm², and the self-corrosion current density (i_corr) decreased from 0.202 3 μA·cm^-2 to 0.006 441 μA·cm^-2. Finally, the physical barrier property and ‘labyrinth effect' of graphene significantly improve the long-term protective effect of the coating on the substrate.

Key words： graphene epoxy resin coating corrosion resistance protection for a long time

Published: Online: 2023-07-10

CLC number:

TB304

Fund:Sichuan Provincial Science and Technology Program Funding (2022YFG0275), and Innovation Fund of Sichuan University of Science and Engineering (y2020013).

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	Articles by authors
	HUANG Zhixiong
	HU Xinjun
	TIAN Jianping
	CHEN Manjiao
	MA Xiaoyan
	JIANG Xuelian
	TANG Shiying

Cite this article:

HUANG Zhixiong,HU Xinjun,TIAN Jianping, et al. Study on Anti-corrosion Performance of Aryl Phosphate Salt Modified Graphene/Waterborne Epoxy Composite Coating[J]. Materials Reports, 2023, 37(13): 21110138-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21110138 OR http://www.mater-rep.com/EN/Y2023/V37/I13/21110138

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