Fabrication of a novel hydrophobic anti-corrosion film based on Eu2O3/stearic acid on steel surface; Experimental and detailed computer modeling studies

Mofidabadi, Amir Hossein Jafari; Bahlakeh, Ghasem; Ramezanzadeh, Bahram

doi:10.1016/j.jtice.2020.09.022

Cited by 4 publications

(2 citation statements)

References 63 publications

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“…However, the morphology was changed in the Si–Mo@COF-Eu/EP sample due to the Eu 3+ release, resulting in the hindrance of cathodic reactions and hence a uniform film containing Eu 2 O 3 formation. In addition, the Eu 2 O 3 has a less hydrophilic structure than the iron complexes, and corrosion rusts in the blank and Si–Mo@COF-filled nanocomposite coatings, leading to more corrosion product formation . Finally, the EDS analysis reaffirmed the presence of europium oxide in this area.…”

Section: Resultsmentioning

confidence: 83%

Design of Nacre-Inspired 2D-MoS₂ Nanosheets Assembled with Mesoporous Covalent Organic Frameworks (COFs) for Smart Coatings

Najmi

Keshmiri

Ramezanzadeh

et al. 2022

ACS Appl. Mater. Interfaces

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High loading capacity and smart release of inhibitors are the first and foremost characteristics of nanocontainers, which play a pivotal role in metal active corrosion protection. The present work explores the development of novel protective nanocontainers based on recently emerged covalent organic frameworks (COFs). These highly porous frameworks with large surface area, outstanding thermomechanical properties, low density, and ease of functionalization are used as nanocontainers. On the other hand, molybdenum disulfide (MoS2), a state-of-the-art 2D layered compound with a sheetlike structure, was utilized thanks to its excellent barrier properties. However, these lamellar structures suffer a high agglomeration tendency in polymeric matrices. Therefore, we developed a novel hybrid nanocontainer, inspired by natural nacre, by an in situ growth of COF on MoS2 to improve the stability and provide a high inhibitor loading capacity. The porous and nitrogen-rich structure of COF made it a good carrier to adsorb europium cations as inorganic inhibitors and release them on demand by pH changes to suppress the electrochemical reactions. The as-synthesized nanoplatforms were used as pH-responsive fillers in the epoxy resin. The nanocomposite coatings showed almost 50 kΩ cm2 total resistance and high impedance values (1011 Ω cm2) even after 77 days of immersion. Moreover, salt spray analysis depicted the smallest amount of rust and corrosion product after 31 days in the filled nanocomposite coating. Cathodic delamination and pull-off outcomes denoted that the filled coatings with the as-synthesized nanofiller showed the smallest cathodic delamination radius (3.41 mm) and lowest adhesion loss (24%) compared to the neat epoxy (7.55 mm and 46.7%). As such, the highly porous modified MoS2 nanosheets are considered promising alternatives in a wide range of applications with anticorrosion properties.

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Section: Resultsmentioning

confidence: 83%

Design of Nacre-Inspired 2D-MoS₂ Nanosheets Assembled with Mesoporous Covalent Organic Frameworks (COFs) for Smart Coatings

Najmi

Keshmiri

Ramezanzadeh

et al. 2022

ACS Appl. Mater. Interfaces

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“…In combination with the current primary conservation process of iron artifacts, rusted iron artifacts are often treated with corrosion inhibiting materials such as tannic acid and then surface sealing [ 29 ]. For the protection of ferrous materials, tannic acid is commonly used for corrosion inhibition [ 30 , 31 ], and stearic acid for low-surface energy modification [ 32 , 33 ], showing good corrosion resistance. Tannic acid can chelate with iron ions to generate iron tannate covering the surface and transfer active corrosion products into a stable state.…”

Section: Introductionmentioning

confidence: 99%

Construction and Performance of Superhydrophobic Surfaces for Rusted Iron Artifacts

Jia

et al. 2023

Materials

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Ancient iron artifacts need to be protected with a rust layer, often stabilized by tannic acid corrosion inhibition. In humid environments, water vapor could slowly penetrate and trigger galvanic corrosion of metal artefacts. Sealing treatments are generally applied to the artefact surface to isolate water and enhance its corrosion resistance. Superhydrophobic modifications could effectively block the penetration of moisture into the interior of the artefact and provide a nice water barrier. Stearic acid with tannic acid inhibition treatment creates a superhydrophobic protective layer on the surface of rusted iron artifacts and enhances corrosion resistance effectively. Various scientific analyses and testing methods are used in this paper to evaluate the corrosion resistance of rusted surfaces after superhydrophobic modification and investigate the reaction mechanisms. The results indicate that the contact angle of the rusted surface after corrosion inhibition by tannic acid and modified by stearic acid is increased to 152.2°, which means the superhydrophobic protective layer has been successfully constructed. The C/Fe ratio of the rusted surface is increased from 0.21 to 2.10, and the characteristic diffraction peaks of O1s and Fe 2p3/2 shift toward higher binding energy. Stearic acid is combined with the corrosion product layer by chemical bonding. Chelation between rust products, tannic acid, and steric acid is effective, and the chelate is chemically stable. The superhydrophobic surface forms a lamellar wax-like layer as an air barrier to isolate liquid water, resulting in a significant decrease in corrosion current and an increase in Warburg impedance to 217.9 times the original state, with a protection efficiency of 88.3%. Tannic acid corrosion inhibition and stearic acid superhydrophobic modification have an excellent synergistic protective effect on improving the corrosion resistance of iron artifacts, resulting in better corrosion resistance of iron artifact materials. The research provides new ideas and references for the protection of ancient iron artifacts sealing.

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Effect of substitution on corrosion inhibition properties of 4-(substituted fluoro, chloro, and amino) Benzophenone derivatives on mild steel in acidic medium: A combined Electrochemical, surface characterization and theoretical approach

Ravi,

Peters,

Selvi J

2024

Journal of the Taiwan Institute of Chemical Engineers

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Fabrication of a novel hydrophobic anti-corrosion film based on Eu2O3/stearic acid on steel surface; Experimental and detailed computer modeling studies

Cited by 4 publications

References 63 publications

Design of Nacre-Inspired 2D-MoS₂ Nanosheets Assembled with Mesoporous Covalent Organic Frameworks (COFs) for Smart Coatings

Design of Nacre-Inspired 2D-MoS₂ Nanosheets Assembled with Mesoporous Covalent Organic Frameworks (COFs) for Smart Coatings

Construction and Performance of Superhydrophobic Surfaces for Rusted Iron Artifacts

Effect of substitution on corrosion inhibition properties of 4-(substituted fluoro, chloro, and amino) Benzophenone derivatives on mild steel in acidic medium: A combined Electrochemical, surface characterization and theoretical approach

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Fabrication of a novel hydrophobic anti-corrosion film based on Eu2O3/stearic acid on steel surface; Experimental and detailed computer modeling studies

Cited by 4 publications

References 63 publications

Design of Nacre-Inspired 2D-MoS2 Nanosheets Assembled with Mesoporous Covalent Organic Frameworks (COFs) for Smart Coatings

Design of Nacre-Inspired 2D-MoS2 Nanosheets Assembled with Mesoporous Covalent Organic Frameworks (COFs) for Smart Coatings

Construction and Performance of Superhydrophobic Surfaces for Rusted Iron Artifacts

Effect of substitution on corrosion inhibition properties of 4-(substituted fluoro, chloro, and amino) Benzophenone derivatives on mild steel in acidic medium: A combined Electrochemical, surface characterization and theoretical approach

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Product

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Design of Nacre-Inspired 2D-MoS₂ Nanosheets Assembled with Mesoporous Covalent Organic Frameworks (COFs) for Smart Coatings

Design of Nacre-Inspired 2D-MoS₂ Nanosheets Assembled with Mesoporous Covalent Organic Frameworks (COFs) for Smart Coatings