In situ synthesis, electrochemical and quantum chemical analysis of an amino acid-derived ionic liquid inhibitor for corrosion protection of mild steel in 1M HCl solution

Kowsari, Elaheh; Arman, S.Y.; Shahini, M.H.; Zandi, Hassan Gharayagh; Ehsani, Ali; Naderi, Reza; PourghasemiHanza, A.; Mehdipour, Mehrad

doi:10.1016/j.corsci.2016.07.015

Cited by 246 publications

(65 citation statements)

References 62 publications

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“…Besides, one of applications for ionic liquid was corrosion inhibition of metals in acid environments. This was because most of efficient inhibitors have heteroatoms such as N, O, S and multiple bonds in their molecules through which they are adsorbed on the metal surface . Therefore, ionic liquids and graphene‐based nano composites were both expected to be promising in anti‐corrosive applications.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Corrosion Resistance of Epoxy Coatings by Impregnation with a Reduced Graphene Oxide‐Hydrophobic Ionic Liquid Composite

Wang

Zhang

et al. 2018

ChemElectroChem

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Conventional epoxy resin fails as corrosion protection in long‐term soaking in water as pores are developing. Here, a modified epoxy coating with enhanced corrosion resistance was fabricated by impregnation with functionalized reduced graphene oxide‐hydrophobic ionic liquid (RGO‐IL) nano composites. The modified RGO was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT‐IR), electrochemical impedance spectroscopy and simulated immersion experiments. Compared to epoxy resin (ER) coatings without RGO‐IL nano composites, the ER with RGO nano composites showed higher hydrophobicity in contact angle tests. In electrochemical experiments on Q235 substrates coated with the RGO‐IL/ER composite, enhanced barrier properties and excellent corrosion protection was found. A more hydrophobic interface was built, and the nano composite material of RGO‐IL was easy to prepare and cost efficient. We speculated that the presence of the ionic liquids also improves the dispersion properties of RGO in ER, and thereby further improving its barrier effect. In addition, the hydrophobic ionic liquid itself had a hindrance to water molecules and chloride ions. The highlight of our work is the combination of the corrosion inhibition of the hydrophobic ionic liquids with the barrier effect of RGO.

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Section: Introductionmentioning

confidence: 99%

Enhancing the Corrosion Resistance of Epoxy Coatings by Impregnation with a Reduced Graphene Oxide‐Hydrophobic Ionic Liquid Composite

Wang

Zhang

et al. 2018

ChemElectroChem

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“…In Bode plots for stainless steel, only a phase peak is obtained at the middle frequency region with and without the presence of Schiff bases, the deviations of the phase angle refer to the dispersing effect. There is an increase in low frequency impedance modulus as the concentration of SS1 & SS2 increases and consequently the IE (%) increases, explains that the development of more integrated protective film while increasing the concentration of Schiff base …”

Section: Resultsmentioning

confidence: 99%

Schiff Bases of 2,5‐Thiophenedicarboxaldehyde as Corrosion Inhibitor for Stainless Steel under Acidic Medium: Experimental, Quantum Chemical and Surface Studies

Vikneshvaran

Velmathi

2019

ChemistrySelect

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Corrosion of stainless steel (SS) under acidic medium were studied with and without the presence of N',N'''-(thiophene-2,5-diylbis(methanylylidene))di(isonicotinohydrazide) (SS1) and 2,2'-(thiophene-2,5-diylbis(methanylylidene))bis(N-phenylhydrazinecarbo thioamide) (SS2). Different techniques like weight loss, potentiodynamic polarization, Electrochemical Impedance Spectroscopy (EIS), Scanning Electron Microscopy (SEM), Fourier Transform Infrared spectroscopy (FT-IR) and Atomic Force Microscopy (AFM) were employed to demonstrate the corrosion inhibitive behaviour of studied Schiff bases. Results of all the experiments proved that SS2 functions as more convincing inhibitor than SS1 under the studied condition. Corrosion inhibition performance of Schiff base with more sulphur atoms (SS2) against corrosion of SS under acidic medium is comparatively high. Theoretical analysis was further implemented to derive various molecular parameters of the Schiff bases. Energy values of molecular orbitals such as E HOMO , E LUMO and ΔE etc. have provided helpful information regarding electron transfer during adsorption of Schiff bases on stainless steel surface.

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“…As shown in Bode plots, at relatively low concentration of NTA‐ n , the phase angle versus logƒ curve collapses to a narrow spike. However, it is observed that the peak of phase angle versus logƒ curves widens with the increasing NTA‐ n concentration, due to the adsorption of NTA‐ n and/or

{[Fe‐Inhibitor]}^{2+}

complexes on the steel surface . Consequently, the time constant splits into two.…”

Section: Resultsmentioning

confidence: 99%

New surfactants N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides: Preparation and anticorrosion evaluation

Chen

Jiang

Cheng

et al. 2019

Materials & Corrosion

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A new series of N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides (designated as NTA‐n, n = 8, 10, 12, 14, and 16) were synthesized. The electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization showed that NTA‐n could protect availably X70 steel from attack of HCl with an inhibition efficiency of about 95%. And the inhibition ability follows the following sequence: NTA‐8 < NTA‐10 < NTA‐12 < NTA‐14 < NTA‐16, suggesting that prolonging alkyl chain may enhance the inhibition capacity of the molecules. Theoretical investigation backs up well the experiment results. The correlation of theoretical calculation with the experiment results illustrated clearly double logarithmic relations between the corrosion current and the computed quantum chemical parameters such as the highest occupied molecular orbital energy ( E HOMO), energy gap (ΔE), molecular volume ( ν), electronegativity ( χ), the total energy of iron crystal with the adsorbed inhibitor molecule ( E total), the interaction energy of Fe (1 0 0) surface and inhibitor molecules ( E inhibitor), while an equation resembling Hammet relation was existed between the corrosion currents and the fraction of electrons transfer (ΔN). These linear correlations suggest the relation of the inhibitor structure with its inhibition activity: long alkyl chain and electron donating groups in NTA‐n will enhance the corrosion efficiency.

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In situ synthesis, electrochemical and quantum chemical analysis of an amino acid-derived ionic liquid inhibitor for corrosion protection of mild steel in 1M HCl solution

Cited by 246 publications

References 62 publications

Enhancing the Corrosion Resistance of Epoxy Coatings by Impregnation with a Reduced Graphene Oxide‐Hydrophobic Ionic Liquid Composite

Enhancing the Corrosion Resistance of Epoxy Coatings by Impregnation with a Reduced Graphene Oxide‐Hydrophobic Ionic Liquid Composite

Schiff Bases of 2,5‐Thiophenedicarboxaldehyde as Corrosion Inhibitor for Stainless Steel under Acidic Medium: Experimental, Quantum Chemical and Surface Studies

New surfactants N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides: Preparation and anticorrosion evaluation

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