Quantum chemical and experimental investigations on inhibitory behavior of amino–imino tautomeric equilibrium of 2-aminobenzothiazole on steel corrosion in H2SO4 solution

Danaee, I.; Gholami, M.; Avei, Mehdi Rashvand; Maddahy, M. H.

doi:10.1016/j.jiec.2014.11.018

Cited by 43 publications

(11 citation statements)

References 89 publications

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“…Figure 1 shows the Arrhenius graph for mild steel in 1 mol L −1 HCl media, in the absence and presence of 400 mg L −1 of the extracts. The apparent activation energies were calculated (Table 3) from the Arrhenius plots equation (5) 37,38 , which represent the relationship between ln W corr and the reciprocal of the absolute temperature.…”

Section: Weight-loss Measurementsmentioning

confidence: 99%

Barley Agro-industrial Residues as Corrosion Inhibitor for Mild Steel in 1mol L-1HCl Solution

et al. 2019

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The corrosion inhibition of mild steel in 1 mol L −1 HCl by barley grains and malting process residue extracts was investigated by weight loss measurements, polarization curves, electrochemical impedance measurements and scanning electron microscopy. The inhibition efficiency exceeded 92% in the presence of 100 mg L −1 extracts after 24 h immersion time for both extracts. The E a decreased with the addition of the extracts, characterizing the chemical adsorption by the molecules present in the extracts on the surface.The high molecular weight fraction isolated from the barley grain extract also showed high inhibition efficiency, suggesting that macromolecules are probably responsible for the inhibitory action.

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Section: Weight-loss Measurementsmentioning

confidence: 99%

Barley Agro-industrial Residues as Corrosion Inhibitor for Mild Steel in 1mol L-1HCl Solution

et al. 2019

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“…The excess of mercaptoacetic acid (10 eq.) strongly promotes that the protonated form of aminobenzothiazole [11,12] reacts via the nucleophilic endocyclic nitrogen to give 11 as the only product after 30 min of total irradiation every 10 min of interval steps (95%, entry 1). The same excess of acid media but doubling the irradiation total time (60 min) with only two step intervals of 30 min, cause that 11 suffered the opening of the dioxolane ring, so 11' was detected too (entry 2).…”

Section: Resultsmentioning

confidence: 99%

Microwave Assisted Three Component Reaction Conditions to Obtain New Thiazolidinones with Different Heterocyclic Skeletons

Lorenzo

Ocampo

Mandolesi

2019

The 23rd International Electronic Conference on Synthetic Organic Chemistry

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We present here a new proposal for the "one pot" generation of new 4-thiazolidinones (9a-e) through a multicomponent reaction under microwave irradiation conditions, using aromatic and heteroaromatic amines (8a-e), absolute ethanol as a "green" solvent and modifying the aldehyde group in the glycosidic residue, synthesized from D-mannitol. The study is focused in the variation of the irradiation times and the concentration of thioglycolic acid in order to study the possibility of controlling the structure and/or stereochemistry of the products formed in the reaction. Thiazolidinones 9a-d were obtained with a 69-82% The generation of the corresponding reaction products were monitored by TLC and CG-MS, taking reaction aliquots. The conditions reaction proved to be chemoselective depending on the excess of acid and irradiation times.

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“…In addition, these Nyquist diagrams are not perfect semicircles. The deviation of semicircles from perfect circular shape is often referred to the frequency dispersion of interfacial impedance [37][38][39]. This behavior is usually attributed to the inhomogeneity of the metal surface arising from surface roughness or interfacial phenomena [39,40], which is typical of solid metal electrodes [41].…”

Section: Methodsmentioning

confidence: 99%

Thermodynamic and adsorption behavior of N2O4 schiff base as a corrosion inhibitor for API-5L-X65 steel in HCl solution

Danaee

Bahramipanah

2016

Russ J Appl Chem

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The inhibition ability of N,N '-bis(2,4-dihydroxyacetophenone)-1,3-propandiimine (DHAPP) as a schiff base against the corrosion of API-5L-X65 in 1 M HCl solution was evaluated by polarization, electrochemical impedance spectroscopy, and scanning electron microscopy. Polarization studies indicated that DHAPP retards both the cathodic and anodic reactions through chemical adsorption and blocking the active corrosion sites. The adsorption of this compound obeyed the Langmuir adsorption isotherm. The inhibition effi ciency increased with inhibitor concentration and decreased with increasing temperature. EIS data analysed to equivalent circuit model showed that as the inhibitor concentration increased the charge transfer resistance of steel increased whilst double layer capacitance decreased. Kinetic and thermodynamic parameters such as activation energy, enthalpy, entropy, and Gibbs free energy of activation and adsorption were calculated. Gibbs free energy indicated that adsorption occurred through physical and spontaneous process. Scanning electron microscopy was used to study the steel surface with and without inhibitor.The inhibition ability of N,N '-bis(2,4-dihydroxyacetophenone)-1,3-propandiimine (DHAPP) as a schiff base against the corrosion of API-5L-X65 in 1 M HCl solution was evaluated by polarization, electrochemical impedance spectroscopy, and scanning electron microscopy. Polarization studies indicated that DHAPP retards both the cathodic and anodic reactions through chemical adsorption and blocking the active corrosion sites. The adsorption of this compound obeyed the Langmuir adsorption isotherm. The inhibition effi ciency increased with inhibitor concentration and decreased with increasing temperature. EIS data analysed to equivalent circuit model showed that as the inhibitor concentration increased the charge transfer resistance of steel increased whilst double layer capacitance decreased. Kinetic and thermodynamic parameters such as activation energy, enthalpy, entropy, and Gibbs free energy of activation and adsorption were calculated. Gibbs free energy indicated that adsorption occurred through physical and spontaneous process. Scanning electron microscopy was used to study the steel surface with and without inhibitor.

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Quantum chemical and experimental investigations on inhibitory behavior of amino–imino tautomeric equilibrium of 2-aminobenzothiazole on steel corrosion in H2SO4 solution

Cited by 43 publications

References 89 publications

Barley Agro-industrial Residues as Corrosion Inhibitor for Mild Steel in 1mol L-1HCl Solution

Barley Agro-industrial Residues as Corrosion Inhibitor for Mild Steel in 1mol L-1HCl Solution

Microwave Assisted Three Component Reaction Conditions to Obtain New Thiazolidinones with Different Heterocyclic Skeletons

Thermodynamic and adsorption behavior of N2O4 schiff base as a corrosion inhibitor for API-5L-X65 steel in HCl solution

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