Some thiazole derivatives as corrosion inhibitors for carbon steel in acidic medium

Al-Sarawy, A. A.; Fouda, A. S.; El-Dein, W.A. Shehab

doi:10.1016/j.desal.2007.09.013

Cited by 88 publications

(34 citation statements)

References 13 publications

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“…The degree of surface coverage (h) for the inhibitor was obtained from potentiodynamic data [13]. It was assumed that the adsorption of this inhibitor followed the Langmuir adsorption isotherm.…”

Section: Adsorption Isothermmentioning

confidence: 99%

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Electrochemical and quantum chemical calculations on 4,4-dimethyloxazolidine-2-thione as inhibitor for mild steel corrosion in hydrochloric acid

Musa

Kadhum

Mohamad

et al. 2010

Journal of Molecular Structure

215

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Section: Adsorption Isothermmentioning

confidence: 99%

“…Analyst software, this routine uses a non-linear chi squared minimization to fit the data to the Stern-Geary equation. The surface coverage (h) was calculated using [13]:…”

Section: Polarization Measurementsmentioning

confidence: 99%

Electrochemical and quantum chemical calculations on 4,4-dimethyloxazolidine-2-thione as inhibitor for mild steel corrosion in hydrochloric acid

Musa

Kadhum

Mohamad

et al. 2010

Journal of Molecular Structure

215

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“…Values of DH * and DS * were calculated and listed in Table 5. Inspection of these data revealed that the positive signs of the enthalpy (DH * ) reflected the endothermic nature of the steel dissolution process and indicated that the dissolution of steel was difficult [57]. It is clear that from Table 5 that DS * values in the presence of the synthesized cationic inhibitors have positive sign, which means that an increase in ordering takes place in going from reactants to the M ads reaction complex.…”

Section: Activation Parametersmentioning

confidence: 96%

Three gemini cationic surfactants as biodegradable corrosion inhibitors for carbon steel in HCl solution

2015

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Three gemini cationic surfactants with different hydrophobic spacer chain lengths were synthesized and characterized. The inhibition effect of N,on the corrosion of carbon steel in 1.0 M HCl solution at 25-60°C was studied by weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy. The results show that the synthesized inhibitors are effective inhibitors even at very low concentration, and the adsorption on the carbon steel surface obeys the Langmuir adsorption isotherm. Potentiodynamic polarization curves reveal that the synthesized inhibitors behave as a mixed-type inhibitor. Adsorption of used inhibitors led to a reduction in the double layer capacitance and an increase in the charge transfer resistance. Thermodynamic parameters have been obtained by adsorption theory. Surface activity and corrosion inhibition relationship were discussed. The biodegradability of the synthesized surfactants showed their readily biodegradation in the open environment and were considered as environmentally friendly corrosion inhibitors.

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“…A number of thiazole derivatives are widely used as corrosion inhibitors with high efficiency for metal protection in industry. Research interest of several experimental and theoretical works in literature dedicated to this organic compound category, such as 1,3-thiazolidin-5-one derivatives [8], amino derivatives of 1,3-thiazole [7], 2-amino-4-(p-tolyl)-thiazole, 2-methoxy-1,3-thiazole and thiazole-4-carboxaldehyde [18], 2-aminothiazole [19], 2-amino-4-methyl-thiazole [20], 2-mercaptothiazoline [21], 2-aminothiazole derivatives [22], and other types of thiazole derivatives [23], etc. Whereas, to the best of our knowledge, there is no theoretical as well as experimental backgrounds have been systematically proposed to evaluate the corrosion inhibition performance of four compounds including 2-acetyl-thiazole (ATZ), 2-isobutylthiazole (ISTZ), 4-methyl-5-(2-hydroxyethyl)-thiazole (SFR) and 2,4,5-trimethyl-thiazole (TMTZ) (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The inhibition efficiency of organic compounds is related to their adsorption properties. The adsorption mainly depends on some physical chemical properties of the molecule, such as its functional groups, steric effects, -orbital character of donating electrons and electronic density of donor atoms [7,8], as well as on the possible interaction between π-orbitals of the inhibitor and d-orbitals of the metallic surface atoms [8]. The most popular parameters, which could use to evaluate the corrosion inhibition effectiveness of molecules, are the eigenvalues of highest-occupied molecular orbital (HOMO) and lowestunoccupied molecular orbital (LUMO), HOMO-LUMO gap, electronegativity and chemical hardness, softness, dipole moment, etc.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition Perfomance of Four Natural Thiazole Derivatives: Quantum Chemical and Monte Carlo Simulation Studie

Dao¹

2018

JST

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Some thiazole derivatives: 2-acetyl-thiazole, 2-isobutyl-thiazole, 4-methyl-5-(2-hydroxyethyl)-thiazole, 2,4,5-trimethyl-thiazole used as corrosion inhibitors for iron were calculated at DFT-PBEPBE/6-31+G(d,p) level of theory and by Monte Carlo simulations. Quantum chemical parameters such as EHOMO, ELUMO, and HOMO and LUMO energy gap, chemical potential ( ), electronegativity , global hardness , softness (S), dipole moment and electrophilicity index have been calculated and discussed in detail to evaluate their inhibiting effectiveness. Mulliken-charges distribution and Fukui function were also calculated in order to visualize the reactive sites of the inhibitor molecules. Calculated results show that 2-acetyl-thiazole represents as the most efficient corrosion inhibitor. The -C4=C5-atomic center of thiazole ring demonstrates as the adsorption site in reaction with metallic surface. Corrosion inhibition effectiveness can be classified in decreasing order: ATZ > TMTZ SFR > ISTZ. Adsorption energies and interaction configurations of the four thiazole derivatives on Fe (110) were obtained using the Monte Carlo simulations. The results indicate that sulphur and nitrogen atoms as well as π-electronic systems within the thiazole ring aided the interaction between the inhibitor molecules and the Fe surface. All the four thiazole molecules adsorbed in parallel orientations on Fe (110) surface which ensures strong interactions with Fe. The adsorption energies were in accord with the results obtained using quantum chemical calculations.

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Some thiazole derivatives as corrosion inhibitors for carbon steel in acidic medium

Cited by 88 publications

References 13 publications

Electrochemical and quantum chemical calculations on 4,4-dimethyloxazolidine-2-thione as inhibitor for mild steel corrosion in hydrochloric acid

Electrochemical and quantum chemical calculations on 4,4-dimethyloxazolidine-2-thione as inhibitor for mild steel corrosion in hydrochloric acid

Three gemini cationic surfactants as biodegradable corrosion inhibitors for carbon steel in HCl solution

Corrosion Inhibition Perfomance of Four Natural Thiazole Derivatives: Quantum Chemical and Monte Carlo Simulation Studie

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