Corrosion protection performance of epoxy coating containing alumina/PANI nanoparticles doped with cerium nitrate inhibitor on Al-2024 substrates

Tavandashti, N. Pirhady; Almas, Sadiya; Esmaeilzadeh, Elina

doi:10.1016/j.porgcoat.2021.106133

Cited by 36 publications

(33 citation statements)

References 56 publications

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“…Especially, the R c value of the WEP coating decreased sharply from 3.66 × 10 8 to 3.52 × 10 5 Ω·cm 2 after 5 days of immersion. Q c is the constant-phase element representing the coating capacitance, which is directly related to the water uptake property of the coating . As shown in Figure d, compared to the other coatings, the h-BN/PANI-1 and h-BN/PANI-2 coatings showed lower Q c values, denoting the low penetration of the electrolyte through the coatings.…”

Section: Resultsmentioning

confidence: 97%

Hexagonal Boron Nitride/Polyaniline Nanocomposites for Anticorrosive Waterborne Epoxy Coatings

Tang

Hou

Wang

et al. 2021

ACS Appl. Nano Mater.

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The hexagonal boron nitride (h-BN) nanosheets have been used as nanofillers to improve the barrier properties of the waterborne epoxy (WEP) coatings. However, the h-BN nanosheets tend to agglomerate, which limits their anticorrosion applications. In this paper, the h-BN/polyaniline (h-BN/PANI) nanocomposites were prepared by the in situ polymerization of aniline on the surfaces of the h-BN nanosheets, which were further used to improve the anticorrosion performance of the WEP coatings. The structures of the as-prepared h-BN/PANI nanocomposites were investigated by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The anticorrosion performances of the coatings were evaluated by electrochemical impedance spectroscopy. After immersion in 3.5 wt % NaCl solution for 28 days, the macro-morphologies and elemental changes of the substrate surfaces were analyzed by a 3D digital microscope and an energy-dispersive spectroscope, respectively. The results showed that the WEP coatings with the h-BN/PANI nanocomposites, especially that with 2 wt % h-BN/PANI nanocomposites, exhibited remarkably reinforced anticorrosion performance compared to the pure WEP coating. For the WEP coating, the coating with 1 wt % PANI, and the coating with 1 wt % h-BN, the substrates have been completely corroded. However, there was no obvious corrosion region for the coating containing 2 wt % h-BN/PANI nanocomposites. The superior anticorrosion performance of the coatings with h-BN/PANI nanocomposites was mainly attributed to the synergistic effect of the well-dispersed h-BN/PANI nanocomposites as the physical barrier and PANI as the corrosion inhibitor in this system.

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Section: Resultsmentioning

confidence: 97%

Hexagonal Boron Nitride/Polyaniline Nanocomposites for Anticorrosive Waterborne Epoxy Coatings

Tang

Hou

Wang

et al. 2021

ACS Appl. Nano Mater.

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“…However, incorporating inorganic nanoparticles can improve the barrier properties and protective performance of the epoxy coatings. Different inorganic materials, including silicon oxide (SiO 2 ), titanium dioxide (TiO 2 ), zinc oxide (ZnO), cerium oxide (CeO 2 ), and zirconium oxide (ZrO 2 ), among others, are recognized as excellent candidates for their physical and mechanical properties, owing to their grain size and grain boundary volume [7]. There are different types of applicator-such as brush, airbrush, doctor blade, drop-casting, dip-coating, spin-coating, etc.-for applying the epoxy coatings to the metallic surface [8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Epoxy-Rich TMOs Deposited on Stainless Steel for Corrosion Applications

et al. 2022

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Epoxy-trimetallic oxide (epoxy-TMO) coatings of ZrO2:TiO2:ZnO at different compositions were synthesized and used to protect a stainless steel surface. The different TMO compositions were synthesized using the ball-milling method and later dispersed on the polymer matrix. The different characterizations performed on these coatings showed that the epoxy-TMO coating with a ratio of 50:40:10 (wt%) exhibited the highest corrosion resistance, in the order of ~1012 Ωcm2, due to the barrier effect of the distributed particles after 28 days in an aggressive environment (3.5 wt% NaCl solution). The influence of the metal oxides in forming a semiconductor layer produces a capacitor-like behavior, influencing corrosion control via a mass transfer mechanism barrier. The water uptake reveals the effect of each metal oxide in the formation of a physical barrier due to the dispersion mechanism, as well as how the particles function within the polymer matrix.

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“…Coating protection method, due to its low cost and convenience, large-scale production, forming a physical barrier between the metal substrate and the corrosive medium to achieve anti-corrosion further, is widely used in metal anti-corrosion. [3][4][5][6] In recent years, various organic coatings have been studied on their protective effects on metals by experts and scholars, but epoxy resin coatings are still the most studied. Epoxy resin is a polycondensation product of epichlorohydrin and bisphenol A or polyol.…”

Section: Introductionmentioning

confidence: 99%

“…At present, there are many methods to control and reduce metal corrosion, such as corrosion inhibitor method, coating protection method, electrochemical protection method, and so on. Coating protection method, due to its low cost and convenience, large‐scale production, forming a physical barrier between the metal substrate and the corrosive medium to achieve anti‐corrosion further, is widely used in metal anti‐corrosion 3–6 …”

Section: Introductionmentioning

confidence: 99%

Preparation and anticorrosion properties of GO‐Ce‐MOF nanocomposite coatings

Chen

Yin

et al. 2021

J of Applied Polymer Sci

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Herein, a new strategy for improving epoxy coatings' anti-corrosion performance has been developed, which combined NH 2 -Ce-MOF with graphene oxide (GO) by hydrothermal method. First, the nanocomposite material's morphology and structure (GO-Ce-MOF) were confirmed by Fourier transform infrared, X-ray diffraction, TG, X-ray photoelectron spectroscopy, and scanning electron microscope (SEM) studies. The dispersity of the composite in the epoxy coating was evaluated by SEM and mapping analysis. Meanwhile, the anti-corrosion of as-prepared composite coatings was investigated in detail by the electrochemical impedance spectroscopy (EIS) and the Tafel polarization curve test. The results illustrated that 2.0 wt% GO-Ce-MOF/EP greatly enhanced the composite coating's anti-corrosion performance compared to other coatings. The reasons for the improvement of the anti-corrosion performance of the composite coating are attributed to the following two aspects: On the one hand, the addition of GO can provide a physical barrier to form a labyrinth effect to slow down the invasion of corrosive media into the metal substrate, on the other hand, the modification of GO can GO-Ce-MOF achieve better compatibility and dispersion in epoxy resin.

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Corrosion protection performance of epoxy coating containing alumina/PANI nanoparticles doped with cerium nitrate inhibitor on Al-2024 substrates

Cited by 36 publications

References 56 publications

Hexagonal Boron Nitride/Polyaniline Nanocomposites for Anticorrosive Waterborne Epoxy Coatings

Hexagonal Boron Nitride/Polyaniline Nanocomposites for Anticorrosive Waterborne Epoxy Coatings

Synthesis and Characterization of Epoxy-Rich TMOs Deposited on Stainless Steel for Corrosion Applications

Preparation and anticorrosion properties of GO‐Ce‐MOF nanocomposite coatings

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