Molecular structure effects on the mechanisms of corrosion protection of model epoxy coatings on metals

Kotb, Yosra; Serfass, Christopher M.; Cagnard, Alain; Houston, Katelyn R.; Khan, Saad A.; Hsiao, Lilian C; Velev, Orlin D.

doi:10.1039/d2qm01045c

Cited by 2 publications

(1 citation statement)

References 74 publications

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“…Currently, organic coatings are used in corrosion protection widespreadly due to their simple processability, low cost and high anti-corrosion performance. 3 However, organic coatings also have some defects，such as long dry time, micropores and cracks during curing process. 4,5 Corrosive media (H 2 O, Cl À , O 2 , etc.)…”

Section: Introductionmentioning

confidence: 99%

Barrier and passivation effects of 2D PANI@JNSs Janus nanosheets in epoxy anticorrosion coating

Zheng

Chi

Chen

et al. 2023

J of Applied Polymer Sci

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The filled sheet‐like inorganic materials can usually improve the anticorrosion performance of the coating. Herein, the Janus nanosheets (JNSs) with two‐dimensional structure were prepared by phase separation method, modified by polyaniline (PANI) on the amino side of JNSs and composited with epoxy resin (EP). Scanning electron microscope (SEM), transmission electron microscopy (TEM), atomic force microscope (AFM), Fourier transform infrared spectroscopy (FT‐IR), thermogravimetry (TG) were used to characterize the morphology and chemical structure of JNSs and PANI@JNSs. The anti‐corrosion performance of coatings was measured by electrochemical impedance spectroscopy (EIS) and salt spray experiment. Compared with pure EP, the |Z|0.01Hz of 0.5%‐JNSs/EP coating and that of 0.5%‐PANI@JNSs/EP coating reached 5.6 × 108 and 5.4× 1010 Ω·cm2 after immersed for 35 days, nearly 2 and 4 orders of magnitude higher than pure EP respectively. The excellent anti‐corrosion performance of 0.5%‐PANI@JNSs/EP coating is due to the synergistic effect of physical barrier effect of PANI@JNSs, interfacial interaction between PANI@JNSs and epoxy resin and passivation effect of PANI. Moreover, PANI@JNSs possess both strengthening and toughening effects on composite coating. Janus nanosheets provide a new idea and method for preparing high‐performance anticorrosive materials.

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Section: Introductionmentioning

confidence: 99%

Barrier and passivation effects of 2D PANI@JNSs Janus nanosheets in epoxy anticorrosion coating

Zheng

Chi

Chen

et al. 2023

J of Applied Polymer Sci

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show abstract

Fabrication of multifunction polyurethane with robust, self-healing and anti-corrosion performance based multiple dynamic bonds strategy

Xu,

Liu,

et al. 2024

Progress in Organic Coatings

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Molecular structure effects on the mechanisms of corrosion protection of model epoxy coatings on metals

Abstract: We seek to reveal the corrosion protection mechanisms of intact thermosetting epoxy coatings on metal substrates as a prerequisite for the future design of innocuous alternatives to bisphenol A-based epoxy...

Cited by 2 publications

References 74 publications

Barrier and passivation effects of 2D PANI@JNSs Janus nanosheets in epoxy anticorrosion coating

Barrier and passivation effects of 2D PANI@JNSs Janus nanosheets in epoxy anticorrosion coating

Fabrication of multifunction polyurethane with robust, self-healing and anti-corrosion performance based multiple dynamic bonds strategy

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