Recent progress in epoxy resins as corrosion inhibitors: design and performance

Dagdag, Omar; Haldhar, Rajesh; Kim, Seong-Cheol; Guo, Lei; Gouri, M. El; Berdimurodov, Elyor; Hamed, Othman; Jodeh, Shehdeh; Akpan, Ekemini D.; Ebenso, Eno E.

doi:10.1080/01694243.2022.2055347

Cited by 19 publications

(9 citation statements)

References 72 publications

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“…Figure 12 reveals that electrophilic reactivity is related to positive (blue) areas of ESP, while nucleophilic reactivity is associated with negative (red) regions, And that the electron-richest regions are primarily near conjugated bonds and heteroatoms, which promotes the creation of a chelate on the MS surface by electron transfer from amide and hydroxy groups to the “d” orbital of the Fe atom and the chemical adsorption of CMEA, which results in the development of a covalent coordination bond [ 65 , 66 ].…”

Section: Resultsmentioning

confidence: 99%

Coco Monoethanolamide Surfactant as a Sustainable Corrosion Inhibitor for Mild Steel: Theoretical and Experimental Investigations

Ganjoo

Sharma

et al. 2023

Molecules

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Recent studies indicate that surfactants are a relatively new and effective class of corrosion inhibitors that almost entirely meet the criteria for a chemical to be used as an aqueous phase corrosion inhibitor. They possess the ideal hydrophilicity to hydrophobicity ratio, which is crucial for effective interfacial interactions. In this study, a coconut-based non-ionic surfactant, namely, coco monoethanolamide (CMEA), was investigated for corrosion inhibition behaviour against mild steel (MS) in 1 M HCl employing the experimental and computational techniques. The surface morphology was studied employing the scanning electron microscope (SEM), atomic force microscope (AFM), and contact measurements. The critical micelle concentration (CMC) was evaluated to be 0.556 mM and the surface tension corresponding to the CMC was 65.28 mN/m. CMEA manifests the best inhibition efficiency (η%) of 99.01% at 0.6163 mM (at 60 °C). CMEA performs as a mixed-type inhibitor and its adsorption at the MS/1 M HCl interface followed the Langmuir isotherm. The theoretical findings from density functional theory (DFT), Monte Carlo (MC), and molecular dynamics (MD) simulations accorded with the experimental findings. The MC simulation’s assessment of CMEA’s high adsorption energy (−185 Kcal/mol) proved that the CMEA efficiently and spontaneously adsorbs at the interface.

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Section: Resultsmentioning

confidence: 99%

Coco Monoethanolamide Surfactant as a Sustainable Corrosion Inhibitor for Mild Steel: Theoretical and Experimental Investigations

Ganjoo

Sharma

et al. 2023

Molecules

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“…A DFT-based theoretical investigation is performed to explore the relation between corrosion inhibition and molecular structures at the atomic scale. This is because it is difficult to gain a deep understanding of corrosion inhibition at the atomic scale by experimental investigations. , Various submethods of DFT-based theoretical studies were utilized to access the theoretical basis of corrosion inhibition by selected organic compounds. , The GAMESS-US with the 6-21G basis sets, density functional theory (DFT), and B3LYP methods were chosen to perform the DFT-based theoretical investigations of pistiphloroglucinyl, pistaciaphenyl ether, and naringenin corrosion inhibitors. wxMacMolPlt and Avogadro were employed for analysis and visualization.…”

Section: Experimental Studiesmentioning

confidence: 99%

Electrochemical and DFT Studies of the Pistacia Integerrima Gall Extract: An Eco-friendly Approach towards the Corrosion of Steel in Acidic Medium

Kaur,

Almujibah,

Alam

et al. 2024

ACS Omega

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A novel application of the Pistacia integerrima gall extract as an environmentally friendly corrosion inhibitor is reported in this study. The major phytochemicals present in the gall extract, namely pistagremic acid, β-sitosterol, pistiphloroglucinyl ether, pistaciaphenyl ester, naringenin, and 5,7-dihydroxy-2-(4hydroxyphenyl)-2,3-dihydrochromen-4-one, play key roles in its anticorrosive behavior on steel in aggressive media. Several approaches were used to study the corrosion prevention activity of steel in 1 M H 2 SO 4 , including weight loss analysis, scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), and density functional theory (DFT). At 2000 mg L −1 , the highest efficiency of 92.19% was observed in 1 M H 2 SO 4 . An SEM study was conducted to validate the surface coverage of the metal surface. DFT studies revealed several nucleophilic regions present in the phytochemicals of the inhibitor, which supported the favorable nucleophilicity. Corrosion studies have not been performed on this sample. Phytochemicals make it an effective corrosion inhibitor, and its extraction process utilizes distilled water, making it better than other inhibitors. It has been proven that the obtained values of ΔE Inh DFT for pistiphloroglucinyl, pistaciaphenyl ether, and naringenin organic compounds were very low, confirming the high reactivity of these corrosion inhibitors. The order of the values of ΔE Inh DFT is as follows: pistaciaphenyl ether > pistiphloroglucinyl ether > naringenin organic compound; this suggests that pistaciaphenyl ether is more reactive than the other compounds. In this study, P. integerrima gall extract emerges as a novel and highly effective corrosion resistance agent in 1 M H 2 SO 4 , chosen for its relevance to acid pickling and cleaning processes.

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“…The values in chemical softness ( 𝜎 𝐷𝐹𝑇 ) for this inhibitor are considerably higher than those in chemical hardness (η 𝐷𝐹𝑇 ), indicating that the selected compound is a softer molecule. Good chemically soft molecules possess low charge states and exhibit strong polarizability [34][35][36][37] .…”

Section: Quantum Chemical Analysismentioning

confidence: 99%

Polymerization of Acrylamide N-methylene Lactic and Glycolic Acid

Khazratkulova,

Zokirova,

Mukhamedova

et al. 2023

Baghdad Sci.J

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In this research work, the novel polymer base on acrylamide N-methylene lactic and glycolic acid was synthesized and its structural performances were identified by the IR, 1H NMR and 13C NMR spectroscopic investigations. The influencing factors and kinetics of polymerization, viscosity performance were studied and quantum chemical calculations were used to identify the correlation between the structure and properties. It was determined that the polymerization rate of the examined monomers in an aqueous solution, in the presence of DAA, adheres to the standard rules for radical polymerization of acrylamide monomers in solution. An investigation into the pH solution's impact on the kinetics of radical polymerization of acrylamido-N-methylene glycolic and acrylamido-N-methylene lactic acids revealed an extreme dependence with a minimum in a neutral medium. It was found the linear correlation between pH and viscosity. The physical and chemical performance of this polymer depends on the structural parameters related the results of quantum chemical calculation. Biological tests conducted on polyacrylamido-N-methylene lactic acid indicated its potential as a plant growth stimulator. The polymeric form of lactic acid was found to enhance the growth of Dustlik variety wheat seedlings by 40% more efficiently than lactic acid alone.

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Recent progress in epoxy resins as corrosion inhibitors: design and performance

Cited by 19 publications

References 72 publications

Coco Monoethanolamide Surfactant as a Sustainable Corrosion Inhibitor for Mild Steel: Theoretical and Experimental Investigations

Coco Monoethanolamide Surfactant as a Sustainable Corrosion Inhibitor for Mild Steel: Theoretical and Experimental Investigations

Electrochemical and DFT Studies of the Pistacia Integerrima Gall Extract: An Eco-friendly Approach towards the Corrosion of Steel in Acidic Medium

Polymerization of Acrylamide N-methylene Lactic and Glycolic Acid

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