Towards understanding corrosion inhibition of sulfonate/carboxylate functionalized ionic liquids: An experimental and theoretical study

Cao, Shuyun; Liú, Dan; Ding, Hui; Lü, Hui; Gui, Jianzhou

doi:10.1016/j.jcis.2020.04.019

Cited by 44 publications

(6 citation statements)

References 41 publications

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“…For the spectra of Trp after steel coupon addition, a blue shift and broadening of the band is observed which may be due to the interconnection of Trp and Fe ions. [ 62 ] Therefore, UV spectra results substantiate the interconnection of Fe ions and the inhibitor molecules, resulting in complexation formation [ 63 ] : Phe–Fe complex and Trp–Fe complex , which mitigated the corrosion of rebar specimens. It is also validated that the inhibitor ions adsorb on the steel substrate through physical and/or chemical processes.…”

Section: Resultsmentioning

confidence: 96%

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Purnima

Goyal

Luxami

2023

Materials & Corrosion

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Corrosion inhibition mechanism of two aromatic amino acids, phenylalanine (Phe) and tryptophan (Trp), was explored for steel in an alkaline pore solution simulating a carbonated concrete environment. The electrochemical impedance spectroscopy and potentiodynamic polarization test results revealed that both compounds can be used effectively as corrosion inhibitors for carbonated concrete environments with high inhibition efficiency. The dissolution of steel got controlled as Phe and Trp acted as anodic‐type inhibitors. Phe and Trp adsorbed on the steel surface by physiochemisorption process following the Langmuir isotherm. The inhibitive solution analysis through UV–visible technique confirmed the formation of inhibitor–Fe complexes. The surface of steel was analyzed after submergence in corrosive solutions with and without inhibitors by means of optical microscopy, scanning electron microscopy–energy‐dispersive X‐ray spectroscopy, Fourier transformed infrared, and X‐ray photoelectron spectroscopy, which highlights the formation of a compact, barrier layer comprised of metal–inhibitor complex. Subsequently, with the help of the aforementioned techniques, an inhibition mechanism for Phe and Trp was conjectured, which revealed that the presence of additional heterocycle in amino acids can raise the chances of chelation and formation of a more adherent and thermodynamically stable layer. Phe bound with Fe ions through the carboxylate functional group only, while Trp chelated the Fe ions via a nitrogen atom of the pyrrole ring and carboxylate functional group.

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Section: Resultsmentioning

confidence: 96%

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Purnima

Goyal

Luxami

2023

Materials & Corrosion

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“…, [(CH 2 ) 3 SO 3 HMIm][HSO 4 ] for mild steel were investigated in the presence of 0.5 M HCl. 120 In this work, it is nicely investigated how the functional groups, in combination with the alkyl chain length, affect the inhibitory mechanism of ImIL. The IE order of the ImILs are as follows: [(CH 2 ) 3 SO 3 HMIm][HSO 4 ] > [(CH 2 ) 2 COOHMIm][HSO 4 ] > [(CH 2 )COOHMIm][HSO 4 ].…”

Section: A Comprehensive Analysis Of the Anti-corrosive Performance O...mentioning

confidence: 99%

Unveiling the future of steel corrosion inhibition: a revolutionary sustainable odyssey with a special emphasis on N⁺-containing ionic liquids through cutting-edge innovations

Zamindar,

Mandal,

Murmu

et al. 2024

Mater. Adv.

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“…Compared with the aliphatic chain lengths of other PILs, the effective arrangement of PLmC 12 had the greatest protection capability on the metal surface shown in Figure 3 [ 30 ]. Cao et al [ 31 ] explored the inhibition efficiency of ILs ([(CH 2 )COOHMIm][HSO 4 ], [(CH 2 ) 2 COOHMIm][HSO 4 ]) for carbon steel in a 0.5 M HCl solution. It was found that ionic liquids can improve the solubility of imidazole rings, and N-heterocyclic parent cations and anions can be adsorbed on metal surfaces as active adsorption sites.…”

Section: The Correlation Between Molecular Structure and Corrosion In...mentioning

confidence: 99%

Revealing the Correlation between Molecular Structure and Corrosion Inhibition Characteristics of N-Heterocycles in Terms of Substituent Groups

Tan

Zeng

2023

Materials

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Controlling metal corrosion can directly address the waste of metal and the environmental pollution and resource depletion caused by metal recycling, very significant factors for green and sustainable development. The addition of corrosion inhibitors is a relatively cost-effective means of corrosion prevention. Among these, N-heterocycles have been widely used because heteroatoms contain lone pairs of electrons that can be strongly adsorbed onto metals, protecting them in highly corrosive environments at relatively low concentrations. However, due to the large variety of N-heterocycles, their corrosion inhibition characteristics have seldom been compared; therefore, the selection of appropriate N-heterocycles in the development of anti-corrosion products for specific applications was very difficult. This review systematically analyzed the influence of different substituents on the corrosion inhibition performance of N-heterocycles, including different alkyl chain substituents, electron-donating and electron-withdrawing substituents, and halogen atoms, respectively. The correlation between the molecular structure and corrosion inhibition characteristics of N-heterocycles was comprehensively revealed, and their action mechanism was analyzed deeply. In addition, the toxicity and biodegradability of N-heterocycles was briefly discussed. This study has provided a significant guideline for the development of green, promising corrosion inhibitors for advanced manufacturing and clean energy equipment protection.

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Towards understanding corrosion inhibition of sulfonate/carboxylate functionalized ionic liquids: An experimental and theoretical study

Cited by 44 publications

References 41 publications

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Unveiling the future of steel corrosion inhibition: a revolutionary sustainable odyssey with a special emphasis on N⁺-containing ionic liquids through cutting-edge innovations

Revealing the Correlation between Molecular Structure and Corrosion Inhibition Characteristics of N-Heterocycles in Terms of Substituent Groups

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Towards understanding corrosion inhibition of sulfonate/carboxylate functionalized ionic liquids: An experimental and theoretical study

Cited by 44 publications

References 41 publications

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Unveiling the future of steel corrosion inhibition: a revolutionary sustainable odyssey with a special emphasis on N+-containing ionic liquids through cutting-edge innovations

Revealing the Correlation between Molecular Structure and Corrosion Inhibition Characteristics of N-Heterocycles in Terms of Substituent Groups

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Unveiling the future of steel corrosion inhibition: a revolutionary sustainable odyssey with a special emphasis on N⁺-containing ionic liquids through cutting-edge innovations