ac impedance, X-ray photoelectron spectroscopy and density functional theory studies of 3,5-bis(n-pyridyl)-1,2,4-oxadiazoles as efficient corrosion inhibitors for carbon steel surface in hydrochloric acid solution

Outirite, Moha; Lagrenée, Michel; Lebrini, Mounim; Traisnel, Michel; Jama, Charafeddine; Vezin, Hervé; Bentiss, Fouad

doi:10.1016/j.electacta.2009.10.048

Cited by 243 publications

(90 citation statements)

References 56 publications

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“…We obtain time constants close to 0.02, indicating that the equivalent electrical circuits are associated with relatively rapid charge/discharge processes [22,35]. The corrosion parameters found for S235 and S355 steels are not far from those of many steels found in the literature [36][37][38][39][40][41][42].…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 49%

Investigations on the corrosion of constructional steels in different aqueous and simulated atmospheric environments

Gassama¹,

Diagne²,

Yade³

et al. 2015

Bull. Chem. Soc. Eth.

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ABSTRACT. The corrosion behavior of three constructional steels used in Senegal, S235, S275 and S355, was studied in simulated atmospheric conditions in an exposure chamber above distilled water and above 3% NaCl solution representing marine atmosphere by comparing the ratio of rusted to unrusted area. Electrochemical test methods (potentiodynamic tests and electrochemical impedance spectroscopy) were employed to study the steels fully immersed in acidic, near neutral and basic conditions in 0.5 M HCl, NaCl, and NaOH solutions, respectively. Results indicate that S355 and S235 steels have comparable corrosion resistance, which are much lower than that of S275.

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Section: Electrochemical Impedance Spectroscopymentioning

confidence: 49%

Investigations on the corrosion of constructional steels in different aqueous and simulated atmospheric environments

Gassama¹,

Diagne²,

Yade³

et al. 2015

Bull. Chem. Soc. Eth.

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“…Such behavior is characteristic of solid electrodes and often referred to frequency dispersion could be attributed to different physical phenomenon such as roughness, inhomoginities of the solid surfaces, impurities, grain boundaries, and distribution of surface active sites. In this case, the constant phase element CPE is introduced in the circuit instead of a pure double layer capacitor to give a more accurate fit [32][33][34]. The impedance function of a CPE has the following equation.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4‐amino‐4H,3,5‐di(methoxy)‐1,2,4‐triazole (ATD), BATD, and DBATD on copper metal in 1N H₂SO₄

John

Joy

Prajila

et al. 2011

Materials & Corrosion

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The interaction of 4-amino-4H,3,5-di(methoxy)-1,2,4-triazole (ATD), (4-(benzylideneamino)-4H-1,2,4-triazole-3,5-diyl) dimethanol (BATD), and (4-(4-(dimethylamino) benzylideneamino))-4H-1,2,4-triazole-3,5-diyl) dimethanol (DBATD) on copper in 1 N sulfuric acid was investigated by potentiodynamic polarization (Tafel), ac impedance (EIS), molecular dynamic (MD) studies, and quantum chemical calculations at 300 K. Polarization studies clearly showed that ATD, BATD, and DBATD act as mixed type inhibitors. As the electron density around the inhibitor molecule increases due to substitution, the inhibition efficiency also increases correspondingly. Quantum chemical approach was used to calculate some electronic properties of these molecules to ascertain the correlation between inhibitive effect and molecular structure. Both the experimental and theoretical studies agree well in this regard and confirm that DBATD is having a better interaction with the metal surface in 1 N sulfuric acid than BATD and ATD. The adsorption behaviors of these molecules on the copper surface have been studied using MDs method and density functional theory.

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“…We obtain quite similar values for both inhibitors. They are comprised between 0.04 and 0.18 seconds, indicating that the equivalent electrical circuit is associated with a slow charge/discharge process [36,39,40].…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Clays valorization as corrosion inhibitors for E400 reinforcing steel

Gassama

Fall

Yade

et al. 2016

Ovidius University Annals of Chemistry

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Abstract. The behavior of E400 steel, a constructional steel widely used in Senegal, was studied in aqueous NaCl solution in the presence of two types of clay: volcanic tuffs, and sedimentary montmorillonite. The protection efficiency of these compounds were electrochemically assessed (corrosion potential variation curves, polarization curves and electrochemical impedance spectroscopy) at various inhibitor contents. The results obtained showed that these inhibitors present an inhibitory efficacy of about 70% for an optimal concentration of 0.60% for the tuffs and 62% for a maximum content of 0.50% for montmorillonite.

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ac impedance, X-ray photoelectron spectroscopy and density functional theory studies of 3,5-bis(n-pyridyl)-1,2,4-oxadiazoles as efficient corrosion inhibitors for carbon steel surface in hydrochloric acid solution

Cited by 243 publications

References 56 publications

Investigations on the corrosion of constructional steels in different aqueous and simulated atmospheric environments

Investigations on the corrosion of constructional steels in different aqueous and simulated atmospheric environments

Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4‐amino‐4H,3,5‐di(methoxy)‐1,2,4‐triazole (ATD), BATD, and DBATD on copper metal in 1N H₂SO₄

Clays valorization as corrosion inhibitors for E400 reinforcing steel

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ac impedance, X-ray photoelectron spectroscopy and density functional theory studies of 3,5-bis(n-pyridyl)-1,2,4-oxadiazoles as efficient corrosion inhibitors for carbon steel surface in hydrochloric acid solution

Cited by 243 publications

References 56 publications

Investigations on the corrosion of constructional steels in different aqueous and simulated atmospheric environments

Investigations on the corrosion of constructional steels in different aqueous and simulated atmospheric environments

Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4‐amino‐4H,3,5‐di(methoxy)‐1,2,4‐triazole (ATD), BATD, and DBATD on copper metal in 1N H2SO4

Clays valorization as corrosion inhibitors for E400 reinforcing steel

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Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4‐amino‐4H,3,5‐di(methoxy)‐1,2,4‐triazole (ATD), BATD, and DBATD on copper metal in 1N H₂SO₄