Preparation of polyvinylpyrrolidone/graphene oxide/epoxy resin composite coatings and the study on their anticorrosion performance

Zhang, Jian; Liu, Zhongyuan; Zhang, Lanhe; Ma, Jun; Sun, Dalin; Zhang, Di; Liu, Jingrong; Bai, Haina; Wang, Bing

doi:10.1002/app.50596

“…Many methods have been attempted to protect the metallic surface against corrosion, for example, polymeric coatings [3], inorganic coatings [4], hydrid coatings [5], self-healing smart coatings [6],…”

Section: Introductionmentioning

confidence: 99%

Improved anticorrosive property of waterborne epoxy coating by ultrasonic blending with small amounts of polyaniline

Xu

¹

,

Zhang

²

,

Wang

³

et al. 2022

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In order to improve the anticorrosive performance of waterborne epoxy (WEP) coating, small amounts of polyaniline (PANI) were blended under ultrasonic irradiation to obtain PANI/WEP composite coatings with high dispersibility of PANI particles. The PANI/WEP composite coatings were characterized by Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM). Their adhesive force level and hardness grade were tested based on the Chinese National Standard GB/T9286-1998 and GB/T6739-1996, respectively. These results indicated that, compared to the pristine WEP coating, the addition of PANI with suitable content could completely fill the micropores or microcracks and remarkably improve the hardness grade of composite coatings. The electrochemical impedance spectra (EIS) and Tafel polarization curves revealed that the addition of PANI not only could increase the impedance arc, but also could increase the impedance modulus at low frequency. Then, the salt spray tests were employed to observe the anticorrosive performance of PANI/WEP composite coatings. Finally, the enhanced anticorrosive mechanism of WEP coating by the addition of small amounts of PANI was proposed and discussed. The addition of PANI with suitable content could play an important role of physical and chemical barriers to improve the anticorrosive performance of waterborne epoxy coating.

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“…[2][3][4] In order to improve the corrosion resistance of epoxy coatings and prolong their service life, common modification methods include chemical modification (such as silicone, 5 acrylic acid 6 ) and filler modification. [7][8][9][10] Corrosion of materials is related to the properties and microstructure of surface coatings. Studies have found that adding nanofillers to organic coatings can effectively enhance their wear resistance, corrosion resistance, and aging resistance.…”

Section: Introductionmentioning

confidence: 99%

“…In order to improve the corrosion resistance of epoxy coatings and prolong their service life, common modification methods include chemical modification (such as silicone, 5 acrylic acid 6 ) and filler modification 7–10 . Corrosion of materials is related to the properties and microstructure of surface coatings.…”

Section: Introductionmentioning

confidence: 99%

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

Lin

¹

,

Peng

²

,

Duan

³

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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“…Many methods have been attempted to protect the metallic surface against corrosion, for example, polymeric coatings [3], inorganic coatings [4], hydrid coatings [5], self-healing smart coatings [6], photocathodic protection [7] and so on. Among them, the polymeric coatings are more popularly used for the protection of metallic surface, which can form a protective barrier to inhibit the penetration of corrosive media including H 2 O, O 2 and other ions.…”

Section: Introductionmentioning

confidence: 99%

Improved anticorrosive property of waterborne epoxy coating by ultrasonic blending with small amounts of polyaniline

Huanyan

¹

,

Zhang

²

,

Wang

³

et al. 2021

Preprint

1

0

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In order to improve the anticorrosive performance of waterborne epoxy (WEP) coating, small amounts of polyaniline (PANI) were blended under ultrasonic irradiation to obtain PANI/WEP composite coatings with high dispersibility of PANI particles. The PANI/WEP composite coatings were characterized by Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM). Their adhesive force level and hardness grade were tested based on the Chinese National Standard GB/T9286-1998 and GB/T6739-1996, respectively. These results indicated that, compared to the pristine WEP coating, the addition of PANI with suitable content could completely fill the micropores or microcracks and remarkably improve the hardness grade of composite coatings. The electrochemical impedance spectra (EIS) and Tafel polarization curves revealed that the addition of PANI not only could increase the impedance arc, but also could increase the impedance modulus at low frequency. Then, the salt spray tests were employed to observe the anticorrosive performance of PANI/WEP composite coatings. Finally, the enhanced anticorrosive mechanism of WEP coating by the addition of small amounts of PANI was proposed and discussed. The addition of PANI with suitable content could play an important role of physical and chemical barriers to improve the anticorrosive performance of waterborne epoxy coating.

show abstract

Preparation of polyvinylpyrrolidone/graphene oxide/epoxy resin composite coatings and the study on their anticorrosion performance

Cited by 21 publications

References 44 publications

Improved anticorrosive property of waterborne epoxy coating by ultrasonic blending with small amounts of polyaniline

Improved anticorrosive property of waterborne epoxy coating by ultrasonic blending with small amounts of polyaniline

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

Improved anticorrosive property of waterborne epoxy coating by ultrasonic blending with small amounts of polyaniline

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