Incorporation of Al2O3, GO, and Al2O3@GO nanoparticles into water-borne epoxy coatings: abrasion and corrosion resistance

Huang, Jia‐Qi; Liu, Kunming; Song, Xin; Zheng, Guocheng; Chen, Qing; Sun, Jiadi; Jin, Haozhe; Jiang, Lanlan; Jiang, Yusheng; Zhang, Yi; Jiang, Peng; Wu, Wangping

doi:10.1039/d2ra04223a

Cited by 11 publications

(2 citation statements)

References 58 publications

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“…It is likely that the enhancement of this peak at 3449 cm −1 is a consequence of the -NH 2 in KH550, as the introduction of amino groups can form hydrogen bonds with water molecules, thus increasing the hydrophilicity of SiO 2 and promoting their good dispersion in aqueous epoxy resin. A new absorption peak was observed at 2924 cm −1 as a result of the stretching vibration peaks on the -CH 3 in KH550 [ 52 , 53 , 54 ]. KH550 was grafted successfully onto SiO 2 based on such results.…”

Section: Resultsmentioning

confidence: 99%

Revealing the Impact of Micro-SiO2 Filer Content on the Anti-Corrosion Performance of Water-Borne Epoxy Resin

Fan,

Yang,

Cao

et al. 2023

Polymers

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Due to green development in recent years, water-borne epoxy resins (WBE) have become increasingly popular since they generate the lowest level of volatile organic compounds (VOC) during curing. However, because of the large surface tension of water, it is easy to produce voids and cracks during the curing process of the coating. An electrochemical strategy was used in this study to assess the impact of different SiO2 content on the corrosion performance of a WBE coating, in which micron spherical SiO2 particles were synthesized in a liquid phase reduction. The results showed that the synthesized micron spherical SiO2 particles were about 800 ± 50 nm in diameter and in an amorphous state. By hydrophilizing the surfaces of these SiO2 particles, uniform dispersion in an aqueous solvent and a WBE can be achieved. It is important to note that adding a small or excessive amount of SiO2 to a coating will not improve corrosion resistance and may even reduce corrosion resistance. With the appropriate modification of SiO2, corrosion resistance of composite coatings is greatly enhanced, as is the adhesion between the coatings and the metallic substrates. Because the appropriately modified SiO2 can effectively fill the pores that are formed during the curing process, a corrosive medium is less likely to react with the matrix when the medium comes into contact with the matrix. Based on their incorporation content of 3 wt.%, their corrosion resistance is the best after 16 cycles of AC-DC-AC accelerated corrosion tests.

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Section: Resultsmentioning

confidence: 99%

Revealing the Impact of Micro-SiO2 Filer Content on the Anti-Corrosion Performance of Water-Borne Epoxy Resin

Fan,

Yang,

Cao

et al. 2023

Polymers

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“…The presence of holes and cracks in the coatings facilitates the penetration of the corrosive media to initiate the corrosion of metals to form rust under coatings, which repels the coating layers to increase the corrosion of the metal substrates more than bare surfaces . Different types of highly dispersed inorganic nanofillers, − elastic nanoparticles such as nanogels and rubbers, − curing nanomediators, and self-healing materials − are used to overcome the limitations of epoxy anticorrosive coatings. Moreover, the toxicity of both epoxy resins based on bisphenols and their hardeners based on polyamines or polyamides motivated researchers to develop different types of green water-soluble epoxy resins derived from natural products to synthesize and apply as epoxy anticorrosive organic coatings .…”

Section: Introductionmentioning

confidence: 99%

New Epoxy and Hardener System Based on an Imidazolium Ionic Liquid as an Anticorrosive Coating for Steel in the Marine Environment

et al. 2023

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The large sizes of cations and anions of organic salts are the driving force for the application of ionic liquids (organic salts) in harsh salty conditions. Moreover, the formation of crosslinked ionic liquid networks as anti-rust and anticorrosion protective films on the substrate surfaces repels seawater salt and water vapor from their surface to prevent corrosion. In this respect, an imidazolium epoxy resin and polyamine hardener as ionic liquids were prepared by the condensation of either pentaethylenehexamine or ethanolamine with glyoxal and p-hydroxybenzaldehyde or formalin in acetic acid as a catalyst. The hydroxyl and phenol groups of the imidazolium ionic liquid were reacted with epichlorohydrine in the presence of NaOH as a catalyst to prepare polyfunctional epoxy resins. The chemical structure, nitrogen content, amine value, epoxy equivalent weight, thermal characteristics, and stability of the imidazolium epoxy resin and polyamine hardener were evaluated. Moreover, their curing and thermomechanical properties were investigated to confirm the formation of homogeneous, elastic, and thermally stable cured epoxy networks. The corrosion inhibition and salt spray resistance of the uncured and cured imidazolium epoxy resin and polyamine as coatings for steel in seawater were evaluated.

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Corrosion Resistance of a Magnesium Alloy Surface with a Superhydrophobic Oxidation Coating

Wang,

Liu

2024

ChemistrySelect

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In view of the importance of metal coatings, this study addresses the ion concentration of the anti‐corrosive coating's immersion solution. The physical properties of the coating surface, such as molecular characteristics, smoothness, and structural strength, were changed by adding nano‐SiO2 in the immersion solution to formulate the best scheme for anti‐corrosive performance. The composite coating was prepared on the surface of AZ31B magnesium alloy by electroless plating. Besides, the surface coating based on AZ31B substrate has high‐quality corrosion resistance to different types of contaminated media. The experimental results demonstrate that the nanocomposite coating can form an ultrafine particle‐filling effect on the metal surface, which is lower than the drag force of the conventional metal surface. Considering the slip velocity gradient in the contact coating area, we reduce the shear stress and drag force, verifying the nanocomposite coating's effect on reducing the reaction force. The contact angle of water droplets in the composite coating is greater than 158.7°. The study finally verifies that the prepared coating has good self‐cleaning potential which can prevent the corrosion of different polluted media.

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Incorporation of Al₂O₃, GO, and Al₂O₃@GO nanoparticles into water-borne epoxy coatings: abrasion and corrosion resistance

Cited by 11 publications

References 58 publications

Revealing the Impact of Micro-SiO2 Filer Content on the Anti-Corrosion Performance of Water-Borne Epoxy Resin

Revealing the Impact of Micro-SiO2 Filer Content on the Anti-Corrosion Performance of Water-Borne Epoxy Resin

New Epoxy and Hardener System Based on an Imidazolium Ionic Liquid as an Anticorrosive Coating for Steel in the Marine Environment

Corrosion Resistance of a Magnesium Alloy Surface with a Superhydrophobic Oxidation Coating

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