On the corrosion inhibition of carbon steel in 1 M HCl with a pyridinium-ionic liquid: chemical, thermodynamic, kinetic and electrochemical studies

Aoun, Sami Ben

doi:10.1039/c7ra04084a

Cited by 68 publications

(16 citation statements)

References 65 publications

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“…Different adsorption mechanisms predicted from ΔGads0 values for the studied inhibitors, suggest that corrosion inhibition is a complex process. This assertion is supported by findings reported for the following corrosion inhibitors: cashew nut testa tannin, pyridinium-ionic liquid, isatin derivatives, clozapine and pyridine Schiff base derivatives [37,38,39,40,41].…”

Section: Resultssupporting

confidence: 78%

Corrosion Resistance of Aluminum against Acid Activation: Impact of Benzothiazole-Substituted Gallium Phthalocyanine

et al. 2019

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This study describes the adsorption behavior of organic inhibitors at the aluminum-HCl solution interface and their corrosion inhibition performance. The organic inhibitors employed are: 4-(benzo [d]thiazol-2ylthio)phthalonitrile (BTThio) and tetrakis[(benzo[d]thiazol-2-yl-thio)phthalo- cyaninato]gallium(III) chloride (ClGaBTThioPc). The corrosion behavior of these inhibitors is investigated using electrochemical and computational techniques. Open circuit potential results reveal predominant cathodic character for the mechanism of aluminum corrosion inhibition by the inhibitors. Inhibition efficiency values from potentiodynamic polarization measurements increase from 46.9 to 70.8% for BTThio and 59.7 to 81.0% for ClGaBTThioPc within the concentration range of 2 to 10 μM. Scanning electron microscopy (SEM) measurements reveal protection of the metal surface from acid attack, in the presence of the inhibitors and energy dispersive X-ray (EDX) measurements show that the most probable way by which the inhibitors protect the metal surface would be by shielding it from the corrosion attacks of Cl− from the acid. Quantum chemical parameters corroborate well with experimental findings.

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Section: Resultssupporting

confidence: 78%

Corrosion Resistance of Aluminum against Acid Activation: Impact of Benzothiazole-Substituted Gallium Phthalocyanine

et al. 2019

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“…Cu + H + / (CuH + ) ads (14) (CuH + ) ads + e À / (CuH) ads (15) (CuH) ads + H + + e À / Cu + H 2 (16) In our study, the corrosion inhibition action of pyrrolidinium-based ILs on copper surface in HNO 3 solutions affects the discharging of H + through competitive adsorption on the cathodic positions which results in H 2 evolution, so the H 2 evolution process occurs according to the subsequent steps in eqn (17) and 18 (18) In general, organic compounds adsorb on the copper metal surface is associated with the substitution of water via the inhibitor molecules in the aqueous solution (Org sol ) replacing the water molecules (H 2 O ads ) at the copper/solution interface: 9…”

mentioning

confidence: 59%

“…Over the last decade, extensive ongoing research have been devoted to the use of ILs as corrosion inhibitors because they fulll the criteria in many practical industrial applications. [16][17][18] In general, ILs are organic salts in its liquid state with low melting point below 100 C, consisting of organic cations as ammonium, imidazolium, pyridinium, piperidinium, sulfonium, phosphonium or pyrrolidinium and inorganic anions such as uoride, chloride, bromide or cyanide. 19 Their intrinsic physicochemical features, like good solvent transport, excellent electrical conductivity, and electrochemical activity make them potential candidates in physisorption and chemisorption studies.…”

Section: Introductionmentioning

confidence: 99%

Impact of some pyrrolidinium ionic liquids on copper dissolution behavior in acidic environment: experimental, morphological and theoretical insights

El-Katori

Abousalem²

2019

RSC Adv.

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“…Generally, high positive value of K ads and high negative value of ΔG ads are associated with strong metal-inhibitor interactions 55,56 . The higher values of K ads for DAEP2 indicate that it has stronger absorption ability than DAEP1 (Table SI3).…”

Section: Resultsmentioning

confidence: 99%

Epoxy pre-polymers as new and effective materials for corrosion inhibition of carbon steel in acidic medium: Computational and experimental studies

Dagdag

Safi

Hsissou

et al. 2019

Sci Rep

105

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Present study is designed for the synthesis, characterization and corrosion inhibition behavior of two diamine aromatic epoxy pre-polymers (DAEPs) namely, N 1 ,N 1 ,N 2 ,N 2 -tetrakis (oxiran-2-ylmethyl) benzene-1,2-diamine (DAEP1) and 4-methyl-N 1 ,N 1 ,N 2 ,N 2 -tetrakis (oxiran-2-ylmethyl) benzene-1,2-diamine (DAEP2) for carbon steel corrosion in acidic medium. Synthesized DAEPs were characterized using spectral (Nuclear magnetic resonance ( 1 H NMR) and Fourier transform infrared-attenuated total reflection (FTIR-ATR)) techniques. Viscosity studies carried out at four different temperatures (20–80 °C) increase in temperature causes significant reduction in their viscosities. The anticorrosive properties of DAEPs differing in the nature of substituents, for carbon steel corrosion in 1 M HCl solution was evaluated using several experimental and computational techniques. Both experimental and computational studies showed that inhibitor (DAEP2) that contains electron releasing methyl (-CH 3 ) showed higher protectiveness as compared to the inhibitor (DAEP1) without substituent (-H). Electrochemical results demonstrate that DAEPs act as reasonably good inhibitors for carbon steel in 1 M HCl medium and their effectiveness followed the sequence: DAEP2 (92.9%) > DAEP1 (91.7%). The PDP results show that the diamine aromatic epoxy pre-polymers molecules (DAEPs) act as mixed type inhibitors. Electrochemical study was also supported using scanning electron microscopy (SEM) method were significant improvement in the surface morphology of inhibited (by DAEPs) metallic specimens was obtained. Results derived from computational density functional theory (DFT) and molecular dynamics (MD) simulationsand studies were consistent with the experimental results derived from SEM, EIS and PDP electrochemical studies. Adsorption of the DAEPs obeyed the Langmuir adsorption isotherm model.

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On the corrosion inhibition of carbon steel in 1 M HCl with a pyridinium-ionic liquid: chemical, thermodynamic, kinetic and electrochemical studies

Abstract: The corrosion inhibition efficiency of 1-hexylpyridinium bromide for carbon steel in molar hydrochloric acid has been investigated by gravimetric, linear polarization, electrochemical impedance spectroscopy and scanning electron microscopy techniques.

Cited by 68 publications

References 65 publications

Corrosion Resistance of Aluminum against Acid Activation: Impact of Benzothiazole-Substituted Gallium Phthalocyanine

Corrosion Resistance of Aluminum against Acid Activation: Impact of Benzothiazole-Substituted Gallium Phthalocyanine

Impact of some pyrrolidinium ionic liquids on copper dissolution behavior in acidic environment: experimental, morphological and theoretical insights

Epoxy pre-polymers as new and effective materials for corrosion inhibition of carbon steel in acidic medium: Computational and experimental studies

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