Study on Anti-corrosion Performance of Aryl Phosphate Salt Modified Graphene/Waterborne Epoxy Composite Coating

被引：0

作者：

Huang Z. ^{[1
]}

Hu X. ^{[1
,2
]}

Tian J. ^{[1
]}

Chen M. ^{[1
]}

Ma X. ^{[2
]}

Jiang X. ^{[1
]}

Tang S. ^{[1
]}

机构：

[1] School of Mechanical Engineering, Sichuan University of Science & Engineering, Sichuan, Zigong

[2] Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Sichuan, Zigong

来源：

Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 13期

关键词：

coating; corrosion resistance; epoxy resin; graphene; protection for a long time;

D O I：

10.11896/cldb.21110138

中图分类号：

学科分类号：

摘要：

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 (icorr) 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. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.

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