Synergistic effect of homogeneously dispersed PANI-TiN nanocomposites towards long-term anticorrosive performance of epoxy coatings

Situ, Yue; Ji, Weiwei; Liu, Cuiyin; Xu, Jiajie; Huang, Hong

doi:10.1016/j.porgcoat.2019.01.034

Cited by 58 publications

(24 citation statements)

References 45 publications

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“…The phase angle, as shown in Fig. (c), exhibited the same trend in which the peak gradually shifted towards the low frequency region, indicating improved anticorrosion properties . To better understand the variation of impedance at f = 0.01 Hz, the initial impedance values were taken from the Bode plots and redrawn as shown in Fig.…”

Section: Resultsmentioning

confidence: 89%

“…The major reason is that aggressive and corrosive media migrate through the coating and reach the steel substrate. The ions acted as charge carriers in the coatings, which led to an electrochemical corrosion at the interface between coating and steel . Taking the EA/GO‐coated steel plate at 3.0 phr GO as an example, the charge transfer resistance was reduced by approximately 49% after its immersion in salt solution for 72 h. However, the EA/GO‐coating (3.0 phr) still gave the maximum resistance among all coatings.…”

Section: Resultsmentioning

confidence: 99%

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Preparation of transparent nanocomposites from UV‐ and thermo‐curable epoxyacrylate and graphene oxide for the application of corrosion protection coatings

Syu

Lin

Yeh

et al. 2019

Polymer International

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In this study, we report UV‐ and thermo‐curable epoxyacrylate/graphene oxide (EA/GO) nanocomposites that present good transparency, excellent pencil hardness and promising improvement in corrosion protection. A dual‐curable EA oligomer with one terminal epoxide and one double bond at the other end was synthesized by reaction of diglycidyl ether of bisphenol‐A and acrylic acid. After mixing EA and GO with the curing agents and reactive diluent followed by UV cure and thermo‐cure, the resulting EA/GO films on a glass slide with GO loading up to 3 phr exhibited over 86% light transmittance. Furthermore, the pencil hardness was enhanced from 3H for EA to 6H for the EA/GO composite at 2 phr GO loading. The corrosion protection of the EA/GO coatings was evaluated by a potentiodynamic polarization technique and electrochemical impedance spectra. The corrosion potential (Ecorr) of the EA/GO‐coated steel increased with increasing GO loading. Meanwhile, Nyquist and Bode plots indicated that the higher the GO content in the EA/GO coating was, the higher was the coating resistance and also the charge transfer resistance after immersion in salt solution. All these results proved that the GO had positive effects on enhancement of the corrosion resistance. The improved corrosion protection by the EA/GO coatings was mainly due to the enhanced hydrophobicity, the deviation of electron transfer and the increased tortuosity of the diffusion path. The improved corrosion protection and hardness together with the useful dual‐curability make the EA/GO nanocomposite a competitive candidate for corrosion protection coatings. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Preparation of transparent nanocomposites from UV‐ and thermo‐curable epoxyacrylate and graphene oxide for the application of corrosion protection coatings

Syu

Lin

Yeh

et al. 2019

Polymer International

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“…30,31 Situ et al investigated the positive effect of adding PANI-TiN nanocomposites to epoxy coatings on long-term corrosion resistance. 32 The results indicated that the PANI-TiN/epoxy composite coating exhibited the better corrosion resistant performance. Compared with the pure epoxy matrix (Ecorr = − 0.573 V), the corrosion potential (Ecorr = − 0.338 V) of PANI-TiN/epoxy composite coating positively shifted by 0.235 V. It can be seen that the addition of PANI improves the corrosion resistance of the coating.…”

Section: Introductionmentioning

confidence: 94%

“…After the PANI has come into contact with the corrosive medium and the metal substrate, a passivation film will be formed on the metal surface to realize the secondary protection of the metal 30,31 . Situ et al investigated the positive effect of adding PANI‐TiN nanocomposites to epoxy coatings on long‐term corrosion resistance 32 . The results indicated that the PANI‐TiN/epoxy composite coating exhibited the better corrosion resistant performance.…”

Section: Introductionmentioning

confidence: 99%

Positive effect of the addition of polyaniline on the anticorrosive property of polyethersulfone two‐layer composite coating

Wang

Zhu

Yao

et al. 2021

J of Applied Polymer Sci

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In order to prepare a coating with better corrosion resistance, the double‐layer coatings are designed to work together in this article. The double‐layer coatings are made of polyethersulfone and epoxy resin as the matrix resin. Polyaniline (PANI) of different contents was added to the matrix resin by weight to form the primer coats, which was named as d‐0, d‐20, d‐40, d‐60. And polytetrafluoroethylene was introduced into the matrix resin to prepare the surface coats. A two‐layer coating was prepared by coating the surface layer on the primer layer, named as S‐0, S‐20, S‐40, S‐60. The surface morphology of the primer coatings and the cross section morphology of the two‐layer coatings were determined by field emission scanning electron microscopy. The anticorrosion property of the coatings was studied by water absorption, adhesion, salt spray corrosion acceleration test and electrochemical impedance test. The results indicate that the 40 wt% PANI composite coating shows the best corrosion resistance.

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“…and surface functionalization of them has been practiced over the past three decades in order to enhance the ultimate properties of organic coatings Nevertheless, the degree of improvement in properties of coatings containing functionalized nanoparticles was not addressed precisely from a molecular view by monitoring the curability of the surface functionalized nanoparticle to epoxy curing reaction. The other difficulty was that no molecular-level gauge was available for quantifying the status quo of cross-link density of thermoset nanocomposite once nanoparticle was functionalized with reactive groups or molecules [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Curing epoxy with ethylenediaminetetraacetic acid (EDTA) surface-functionalized Co Fe3-O4 magnetic nanoparticles

Jouyandeh

Ganjali

Ali

et al. 2019

Progress in Organic Coatings

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In this work, the bulk and surface composition of Fe3O4 supermagnetic nanoparticles were modified for efficient epoxy curing. The bare, ethylenediaminetetraacetic acid (EDTA) capped, and cobalt (Co)-doped EDTA capped Fe3O4 nanoparticles were synthesized electrochemically.The crystalline nature and phase information of the nanoparticles, surface capping, morphology and magnetization of nanoparticles were studied by X-Ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometer (VSM), respectively. A low amount of the prepared nanoparticle (0.1 wt.%) was used in preparation of epoxy nanocomposites. Nonisothermal differential scanning calorimetry (DSC) under different heating rates was performed to study the potential of nanoparticles in curing epoxy resin with an aliphatic amine. The heat release data on nanocomposites suggest that EDTA capped Co-doped Fe3O4 considerably improved the curing reaction between epoxy resin and the curing agent. Calculations based on Cure Index approved qualitatively a shift from Poor to Good cure by concurrent bulk and surface modifications of magnetic nanoparticles. The approach used in this work can pave the way to enhance curability of epoxy nanocomposites by the combined modification of bulk and surface of nanoparticles.

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Synergistic effect of homogeneously dispersed PANI-TiN nanocomposites towards long-term anticorrosive performance of epoxy coatings

Cited by 58 publications

References 45 publications

Preparation of transparent nanocomposites from UV‐ and thermo‐curable epoxyacrylate and graphene oxide for the application of corrosion protection coatings

Preparation of transparent nanocomposites from UV‐ and thermo‐curable epoxyacrylate and graphene oxide for the application of corrosion protection coatings

Positive effect of the addition of polyaniline on the anticorrosive property of polyethersulfone two‐layer composite coating

Curing epoxy with ethylenediaminetetraacetic acid (EDTA) surface-functionalized Co Fe3-O4 magnetic nanoparticles

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