Electrochemical, chemical and theoretical exploration of the corrosion inhibition of carbon steel with new imidazole-carboxamide derivatives in an acidic environment

Toghan, Arafat; Khairy, Mohamed; Huang, Minghua; Farag, Ahmed A.

doi:10.1016/j.ijoes.2023.100072

Cited by 13 publications

(2 citation statements)

References 64 publications

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“…Contrarily, the inclusion of TMAT and DMTMAT inhibitors can significantly affect the semicircular curve diameters depending on the concentration, which further demonstrates that their addition has slowed the rate of steel dissolving. The efficiency of the examined inhibitor at inhibiting is calculated using the formula below: η % = R ct i − R ct o R ct i × 100 where R ct i and R ct o are the charge transfer resistances in inhibited and inhibitor free solutions. The equivalent circuit model used to match the electrochemical impedance data is depicted in Figure , which comprises the solution resistance R s , polarization resistance R ct , and double-layer capacitance C dl .…”

Section: Results and Discussionmentioning

confidence: 99%

Effect of Adsorption and Interactions of New Triazole-Thione-Schiff Bases on the Corrosion Rate of Carbon Steel in 1 M HCl Solution: Theoretical and Experimental Evaluation

Toghan,

Alduaij,

Fawzy

et al. 2024

ACS Omega

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Due to the unique properties of steel, including its hardness, durability, and superconductivity, which make it an essential material in many industries, it lacks corrosion resistance. Herewith, two novel triazole-thione Schiff bases, namely, (E)-5methyl-4-((thiophen-2-ylmethylene)amino)-2,4-dihydro-3H-1,2,4-triazole-3-thione (TMAT) and (E)-4- (((5-(dimethylamino)thiophen-2-yl)methylene)amino)-5-methyl-2,4-dihydro-3H-1,2,4-triazole-3-thione (DMTMAT), were synthesized and characterized. The corrosion inhibition (CI) ability of these two molecules on carbon steel in an aqueous solution of 1 M HCl as well as their interaction with its surface was studied using a number of different techniques. The results confirmed that the CI capability of these organic molecules depends on their strong adsorption on the metal surface and the formation of a protective anticorrosion film. Weight loss tests revealed that the inhibition efficiencies of TMAT and DMTMAT were 91.1 and 94.0%, respectively, at 1 × 10 −3 M concentrations. The results of electrochemical impedance spectroscopy (EIS) indicated that there was a direct relationship between the inhibitor concentration and the transfer resistance. Potentiodynamic polarization (PDP) experiments have proven to be mixed-type inhibitors of C-steel in aqueous hydrochloric acid solution and follow the Langmuir adsorption isotherm model. Several thermodynamic and kinetic parameters were calculated. The negative values of the adsorption-free energy are −36.7 and −38.5 kJ/mol for TMAT and DMTMAT, respectively, confirming the spontaneity of the adsorption process. The MD simulation study's findings show that the inhibitor molecules are nearly parallel to the metal surface. The interaction energy calculated by the MD simulation and the inhibitory trend are the same. The practical implementation is consistent with what the computer models predicted.

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Section: Results and Discussionmentioning

confidence: 99%

Effect of Adsorption and Interactions of New Triazole-Thione-Schiff Bases on the Corrosion Rate of Carbon Steel in 1 M HCl Solution: Theoretical and Experimental Evaluation

Toghan,

Alduaij,

Fawzy

et al. 2024

ACS Omega

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“…When present in the corrosive medium at an appropriate concentration, inhibitors, which function at the interface of the corrosive media and the metal surface, slow the pace of metal corrosion. Numerous organic compounds with long carbon chains or aromatic rings including hetero atoms like nitrogen, oxygen, sulfur, and phosphorus have been used as potential corrosion inhibitors in acid solutions. − The physicochemical characteristics of the inhibitor, such as the functional groups, steric factors, aromaticity, electron density at the donor atoms, the π-orbital nature of donating electrons, the structure of the molecule, the corrosion environment, and the charge and nature of the metal, are what primarily determine the inhibitor’s ability to inhibit. , Amino acids are naturally occurring, biodegradable, relatively inexpensive, and synthesized with a high purity level of greater than 99%. They also represent a family of nontoxic, water-soluble chemical compounds .…”

Section: Introductionmentioning

confidence: 99%

Cysteine as an Eco-Friendly Anticorrosion Inhibitor for Mild Steel in Various Acidic Solutions: Electrochemical, Adsorption, Surface Analysis, and Quantum Chemical Calculations

Elabbasy,

Toghan,

Gadow

2024

ACS Omega

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The corrosion of iron in acidic environments has a negative impact on global industry. Herewith, the inhibitory effect of cysteine (Cys.) on mild steel (MSL) corrosion in different acidic solutions (1 M HCl, 1 M H 2 SO 4 , and 1 M H 3 PO 4 ) was investigated through weight loss, potentiodynamic polarization (PDP), electrochemical impedance spectroscopy, scanning electron microscopy (SEM), and theoretical calculations. The measurement results indicated that the adsorption of Cys. molecules on the metal surface caused corrosion inhibition. As a result, a protective layer or insoluble compound, or both, is obtained, blocking the active sites, preventing corrosion. The effectiveness (IE %) of the Cys. was enhanced by increasing concentration and lowering temperature. The maximum IE % of inhibition at 1 × 10 −2 M of Cys. obtained are 97.3, 89.7, and 84.4% in HCl, H 3 PO 4 , and H 2 SO 4 solutions, respectively. At the same inhibitor concentration, the double-layer capacity decreased, and the charge-transfer resistance increased from 17.17 to 188.5, 3.564 to 31.91, and 1.325 to 8.715 Ω cm 2 in HCl, H 3 PO 4 , and H 2 SO 4 solutions, respectively. Adsorption and PDP studies confirmed that it obeys the Langmuir adsorption isotherm and acts as a mixed-type inhibitor of physicochemical nature. The corresponding thermodynamic and kinetic parameters were also calculated and discussed. Moreover, the inhibitory effect on the surface was inspected by SEM. The findings demonstrated that the order of IE % using Cys as anticorrosion agent for MSL is HCl > H 3 PO 4 > H 2 SO 4 solutions.

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Frontiers and advances in N-heterocycle compounds as corrosion inhibitors in acid medium: Recent advances

Wang,

An,

Wang

et al. 2023

Advances in Colloid and Interface Science

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Electrochemical, chemical and theoretical exploration of the corrosion inhibition of carbon steel with new imidazole-carboxamide derivatives in an acidic environment

Cited by 13 publications

References 64 publications

Effect of Adsorption and Interactions of New Triazole-Thione-Schiff Bases on the Corrosion Rate of Carbon Steel in 1 M HCl Solution: Theoretical and Experimental Evaluation

Effect of Adsorption and Interactions of New Triazole-Thione-Schiff Bases on the Corrosion Rate of Carbon Steel in 1 M HCl Solution: Theoretical and Experimental Evaluation

Cysteine as an Eco-Friendly Anticorrosion Inhibitor for Mild Steel in Various Acidic Solutions: Electrochemical, Adsorption, Surface Analysis, and Quantum Chemical Calculations

Frontiers and advances in N-heterocycle compounds as corrosion inhibitors in acid medium: Recent advances

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