Influence of fluorinated graphene-modified epoxy coatings on the corrosion behaviour of 2024 aluminium alloy

Zhao, Shixiong; Dou, Baojie; Duan, Song; Lin, Xiuzhou; Zhang, Yingjun; Emori, Wilfred; Gao, Xiulei; Fang, Zhiwen

doi:10.1039/d1ra01870a

Cited by 13 publications

(16 citation statements)

References 68 publications

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“…However, coating 4 still presented one time constant, demonstrating that flake aluminum and spherical aluminum synergistically enhanced the shielding effect, so the corrosive medium was not easy to diffuse and the substrate was not corroded. In addition, the low frequency impedance modulus (|Z| 0.01Hz ) can be used as a vital parameter to further characterize the shielding performance of the composite coatings, 43 as shown in Figure 11d–f. Compared with other three types of coatings, coating 1 exhibited lower |Z| 0.01Hz values throughout the immersion times.…”

Section: Resultsmentioning

confidence: 99%

A dense structure constructed by flake and spherical aluminum: Simultaneously enhanced anti‐wear and anti‐corrosion properties of epoxy/polytetrafluoroethylene composite coatings

et al. 2022

J of Applied Polymer Sci

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The construction of a dense structure of the coatings is the basic guarantee to ensure the good performances of the coatings, and it is also one of the problems faced by the most coatings at present. The present work attempts to build a dense coating structure by introducing flake and spherical aluminum powders into the epoxy/polytetrafluoroethylene composite coatings so as to improve the anti‐wear and anti‐corrosion properties of the coatings. As a result, the coating filled with both flake and spherical aluminum exhibited denser microstructure, which was attributed to the synergistic effect of flake and spherical aluminum particles. Among them, the flake aluminum blocked the straight‐through holes in the coating, while the spherical aluminum further filled the micropores between the flake aluminum and the gaps between the flake aluminum and the matrix. In response, the micro‐hardness of the coating was increased by 58.6% and the wear rate was reduced by 80% compared to that of coating without aluminum powders. The excellent wear resistance was attributed to the synergetic effect of the enhanced micro‐hardness of the coating and the formed high load‐bearing tribofilm on the dual ball. Moreover, the coating still maintained the maximum Rc of 3.63 × 109 Ω cm2 after 360 h of immersion owing to the improved barrier properties of the coating.

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Section: Resultsmentioning

confidence: 99%

A dense structure constructed by flake and spherical aluminum: Simultaneously enhanced anti‐wear and anti‐corrosion properties of epoxy/polytetrafluoroethylene composite coatings

et al. 2022

J of Applied Polymer Sci

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“…FG was synthesized according to the method reported in the literature, and the F/C ratio is 28.19%. 28…”

Section: Methodsmentioning

confidence: 99%

“…At the same time, the research results also pointed to the influence factor of FG on the long-term performance of modified coatings to the compatibility between nanofillers and resins. 28,29 Therefore, improving the interfacial compatibility between nanofillers and EP is an effective way to obtain anticorrosion coatings with better performance. Wang et al 30 reported a method for covalent modification of graphene oxide with dopamine, which effectively improved the compatibility between nanofillers and resins.…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition of Q235 steel by epoxy coatings containing FG@ZIF‐8

Lin

Peng

Duan

et al. 2022

J of Applied Polymer Sci

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In this study, ZIF-8 modified fluorinated graphene composite (FG@ZIF-8) was innovatively prepared and used as a novel functional filler to improve the anticorrosion performance of epoxy coating on Q235 carbon steel. The morphology and structure of FG@ZIF-8 composites were characterized by scanning electron microscopy (SEM), x-ray powder diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and x-ray photoelectron spectroscopy (XPS) tests. The results showed that the structure and morphology of the composites largely depended on the composition ratio of FG and ZIF-8. The mechanical properties and corrosion resistance of FG@ZIF-8 modified coatings were also investigated.The unique two-dimensional sheet structure and insulation of FG in the FG@ZIF-8 filler can not only inhibit the penetration of corrosive media but also discourage electron migration effectively on the interface of coating/matrix during the electrochemical reaction. Meanwhile, the chemical cross-linking between the amine groups in ZIF-8 and the epoxy group increases the degree of densification of the coatings. Besides, the 2-methylimidazole from the dissolution of ZIF-8

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“…Zhao et al examined the anticorrosive performance of FG incorporated epoxy matrix on 2024 aluminum alloy. [101] The FG in epoxy increased the hydrophobicity and corrosion resistance capability. The anticorrosive performance of 2 wt% fluorine content FG in epoxy coating was thrice compared to the virgin epoxy coatings with improved contact angle.…”

Section: Biomedicalmentioning

confidence: 99%

Fluorographene and Its Composites: Fundamentals, Electrophysical Properties, DFT Studies, and Advanced Applications

Borse

Kale

Sonawane

et al. 2022

Adv Funct Materials

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Fluorographenes (FGs) are the youngest family of graphene derivatives 2D layer-structure, which has changed the hybridization state from sp 2 -to-sp 3 carbon and unique CF bonds impacting physical and chemical properties. Due to various types of CF bonds, wide bandgap, tunable F/C ratios, and unique nanostructure, the FGs show attractive physicochemical properties. Owing to the extraordinary properties, the researchers have recently paid attention to exploring FGs into fluorographene composites (FG-Cs) as a potential candidate for fundamental advances in the field of the energy system, optoelectronic, biomedical, and aeronautics. Despite their promise, in-depth experimental and theoretical studies of FGs over FG-Cs are not explored systematically. This review focuses on the recent experimental developments on FGs and FG-Cs, including fundamentals and electrophysical properties, synthesis methods, conductivity, hydrophobicity, and magnetic nature. Further, for the validation, the theoretical studies, first-principle study/density functional theory emphasize their real intrinsic activity, stability, and effects of F content, defects, and doping mechanism. Finally, the wide applications, energy systems to biomedical and optoelectronics to the aerospace industry, along with challenges and future perspectives, are also discussed. This review aims to conclude valuable insights into the fundamental science and perspective toward highly efficient FG-C-based catalysts engineering in advanced applications.

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Influence of fluorinated graphene-modified epoxy coatings on the corrosion behaviour of 2024 aluminium alloy

Abstract: This study provides an enhanced corrosion resistance of epoxy resin (EP) by embedding fluorinated graphene (FG) into the epoxy matrix.

Cited by 13 publications

References 68 publications

A dense structure constructed by flake and spherical aluminum: Simultaneously enhanced anti‐wear and anti‐corrosion properties of epoxy/polytetrafluoroethylene composite coatings

A dense structure constructed by flake and spherical aluminum: Simultaneously enhanced anti‐wear and anti‐corrosion properties of epoxy/polytetrafluoroethylene composite coatings

Corrosion inhibition of Q235 steel by epoxy coatings containing FG@ZIF‐8

Fluorographene and Its Composites: Fundamentals, Electrophysical Properties, DFT Studies, and Advanced Applications

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