Studies of protection of self-assembled films by 2-mercapto-5-methyl-1,3,4-thiadiazole on iron surface in 0.1M H2SO4 solutions

Zhou, Juanjuan; Chen, Shenhao; Zhang, Liang; Feng, Yuanyuan; Zhai, H. Y.

doi:10.1016/j.jelechem.2007.10.011

Cited by 62 publications

(19 citation statements)

References 54 publications

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“…The S 2p spectrum for FMT‐treated mild steel surface is fitted into two peaks (Figure d). The first peak located at 163.69 eV may be attributed to thiol group (−SH) in the adsorbed FMT molecules . The peak at 168.35 eV could be assigned to the S‐Fe bond .…”

Section: Resultsmentioning

confidence: 99%

Experimental and theoretical studies of the inhibition performance of two furan derivatives on mild steel corrosion in acidic medium

Al-Fakih

Abdallah

Aziz

2018

Materials & Corrosion

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Inhibition performance of 2‐furanmethanethiol (FMT) and 2‐furonitrile (FN) against mild steel corrosion in 1 M hydrochloric acid was investigated using weight loss, adsorption isotherms, and electrochemical impedance spectroscopy (EIS). The surface morphology was studied by field emission scanning electron microscope (FESEM) and X‐ray photoelectron spectroscopy (XPS). Quantum chemical calculations were carried out to establish the active sites on the inhibitors. The results show that both inhibitors inhibit mild steel corrosion, and their inhibition efficiencies (IE) increase with increasing inhibitor concentration. FMT shows higher inhibiting effect with IE of 94.54% at 0.005 M. The adsorption of the inhibitors onto mild steel surface obeys Langmuir isotherm. FESEM analysis confirms the adsorption of both inhibitors on the surface. XPS analysis proves the adsorption of FMT onto the surface. The active sites on FMT and FN molecules were effectively established using density functional theory (DFT) based on natural atomic charge, Fukui indices, HOMO and LUMO frontier molecular orbitals. The experimental and quantum results prove the inhibition performances of both inhibitors. FMT performs as an efficient inhibitor with a significant and higher IE compared to FN.

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Section: Resultsmentioning

confidence: 99%

Experimental and theoretical studies of the inhibition performance of two furan derivatives on mild steel corrosion in acidic medium

Al-Fakih

Abdallah

Aziz

2018

Materials & Corrosion

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“…Furthermore, the spectra obtained showed single depressed semicircles and a single one time constant. This is intriguing of the evidence that only one circumstance was prevailing for MS dissolution for metal/aggressive solution interface through the charge transfer process [33].…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 95%

Evaluation of 2-Mercaptobenzimidazole Derivatives as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid

Lgaz

Masroor

Chafiq

et al. 2020

Metals

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This research aimed to develop a better understanding of the corrosion inhibition of the mild steel in acidic medium by new organic molecules. For this purpose, two new compounds namely, 2,3-dihydrobenzo[4,5]imidazo[2,1-b]thiazole (2-BIT) and 3,4-dihydro-2H-benzo[4,5]imidazo[2,1-b]thiazole (3-BIT) were synthesized and evaluated for mild steel (MS) corrosion in HCl. Analyses were carried out using weight loss measurements, electrochemical techniques, and scanning electron microscope (SEM). The adsorption of inhibitors onto the steel surface follows the Langmuir adsorption model. Generally, results showed that the corrosion inhibition efficiency of the investigated molecules was found to increase with increased concentration of inhibitors. Electrochemical tests, i.e., electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques, showed that the addition of our investigated inhibitors decreases the dissolution of the metal and generally act as mixed-type inhibitors. In addition, the influence of temperature (from 303 to 333 K) on the corrosion inhibition was studied, and the results demonstrated that with an increase in temperature, the inhibition efficiency decrease. SEM results confirmed that the inhibition process is due to a protective film that prevents corrosion. Similarly, the results showed that the inhibitory efficiencies reach 93% at 5 × 10−3 M in the case of inhibitor 3-BIT. These results revealed that this compound could effectively control and reduce the corrosion rate of mild steel in the corrosion test solution.

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“…Some studies on the inhibitors from quantum chemical point of view have been reported earlier also [4,16,[25][26][27]5]. The selected molecules have the following description: m1 has three -NH2 groups in the triazine scaffold, m2 has one -OH and one -C 6 H 5 groups replaced by -H in two amine groups, m3 has three -OH groups replaced by three -H in three different -NH 2 groups, m4 has two -OH groups replaced with two -H atoms in two -NH 2 groups, m5 has only one -H group replace with one -H atom in amine group, in m6 all the H atoms are replace with -OH groups in -NH 2 groups and m7 contains a C@O replace by a H atom in NH 2 group.…”

Section: Theory and Computational Studiesmentioning

confidence: 99%

“…With Cerius 2 software the interaction structure between selected melamine derivative and Fe surface is stimulated. In this simulation, Fe surface was designed as per the Zhou et al method [27]. Mulliken charges of all the molecules were calculated and are listed in Table 1.…”

Section: Theory and Computational Studiesmentioning

confidence: 99%

Part 1: In-silico studies as corrosion inhibitor and its experimental investigation on mild steel in wet-lab

Satyanarayana

Himabindu

Kalpana

et al. 2009

Journal of Molecular Structure: THEOCHEM

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Studies of protection of self-assembled films by 2-mercapto-5-methyl-1,3,4-thiadiazole on iron surface in 0.1M H2SO4 solutions

Cited by 62 publications

References 54 publications

Experimental and theoretical studies of the inhibition performance of two furan derivatives on mild steel corrosion in acidic medium

Experimental and theoretical studies of the inhibition performance of two furan derivatives on mild steel corrosion in acidic medium

Evaluation of 2-Mercaptobenzimidazole Derivatives as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid

Part 1: In-silico studies as corrosion inhibitor and its experimental investigation on mild steel in wet-lab

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