G. Bereket

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Dynamic electrochemical impedance spectroscopy and polarization studies to evaluate the inhibition effect of benzotriazole on copper‐manganese‐aluminium alloy in artificial seawater

H. Gerengi, P. Slepski, G. Bereket

Materials and Corrosion > 64 > 11 > 1024 - 1031

The effect of benzotriazole (BTA) on the corrosion of a new type copper‐manganese‐aluminium (CMA) alloy in artificial seawater was investigated using dynamic electrochemical impedance spectroscopy (DEIS), linear polarization resistance, and Tafel extrapolation methods. Measurement results obtained from those three methods showed that corrosion rates decreased while BTA concentration increased. This...

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Quantum chemical studies on inhibition effect of amino acids and hydroxy carboxylic acids on pitting corrosion of aluminium alloy 7075 in NaCl solution

A. Yurt, G. Bereket, C. Ogretir

Journal of Molecular Structure: THEOCHEM > 2005 > 725 > 1-3 > 215-221

Quantum chemical calculations were performed on six amino acids and six hydroxy carboxylic acids. Possible correlations between experimentally obtained inhibition efficiencies (ΔE) for pitting corrosion of Al 7075 alloy in NaCl solution and parameters such as electronic charges on active centres (qO, qN), dipole moment (μ), highest occupied (E _H ) and lowest unoccupied (E _L ) molecular...

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Effect of Schiff Bases Containing Pyridyl Group as Corrosion Inhibitors for Low Carbon Steel in 0.1 M HCl

A. Yurt, G. Bereket, A. Kivrak, A. Balaban, more

Journal of Applied Electrochemistry > 2005 > 35 > 10 > 1025-1032

The inhibiting effect of four newly synthesised Schiff bases containing pyridyl group was investigated on the corrosion of low carbon steel in 0.1 M hydrochloric acid solution under various conditions by potentiodynamic polarisation method and impedance measurements. The Schiff bases used were 2-((1Z)-1-aza-2-(2-pyridyl)vinyl)benzene-1-thiol, (1Z)-1-aza-1,2- di(2-pyridyl)ethene, [((1Z)-1-aza-2-(2-pyridyl)vinyl)amino]benzene-1-thione...

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Investigation on some Schiff bases as HCl corrosion inhibitors for carbon steel

A. Yurt, A. Balaban, S. Ustün Kandemir, G. Bereket, more

Materials Chemistry and Physics > 2004 > 85 > 2-3 > 420-426

Potentiodynamic polarisation and ac impedance studies were carried out on the inhibition of carbon steel in 0.1M hydrochloric acid solution by various Schiff bases containing heteroaromatic substituents. The examined Schiff bases were 2-((1E)-2-aza-2-pyrimidine-2-ylvinyl)thiophene, 2-((1Z)-1-aza-2-(2-pyridyl)vinyl)pyrimidine, 2-((1E)-2-aza-2-(1,3-thiazol-2-yl)vinyl)thiophene, 2-((1Z)-1-aza-2-(2-thienyl)vinyl)benzothiazole...

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Quantum chemical studies on the inhibition efficiencies of some piperazine derivatives for the corrosion of steel in acidic medium

G. Bereket, C. Öğretir, Ç. Özşahin

Journal of Molecular Structure: THEOCHEM > 2003 > 663 > 1-3 > 39-46

Computational calculations on some piperazine derivatives those behave as corrosion inhibitor for steel in presence of KI in sulphuric acid of different normality in gas and aqueous phases using semi-empirical methods (i.e. MINDO/3, MNDO, PM3 and AM1) were carried out to search possible correlation between corrosion rates and geometric structures, charges on nitrogen atoms, highest occupied molecular...

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A theoretical approach to search inhibition mechanism of corrosion via metal–ligand interaction for some imidazole derivatives

C. Öğretir, S. Çalış, G. Bereket

Journal of Molecular Structure: THEOCHEM > 2003 > 635 > 1-3 > 229-237

The mechanism of corrosion inhibition was searched by investigating the stability of Zn complexes of five imidazole derivatives using semiempirical methods in gas phase. The obtained results were found to be parallel to the experimental values of literature with the exception of compound 3 which is an ester.

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A theoretical search on metal–ligand interaction mechanism in corrosion of some imidazolidine derivatives

C. Öğretir, S. Çalış, G. Bereket, H. Berber

Journal of Molecular Structure: THEOCHEM > 2003 > 626 > 1-3 > 179-186

The interaction mechanism of some imidazolidine derivatives with metallic Zn in gas phase, using semiempirical methods, was studied at elevated temperature and the obtained data were used to search a possible correlation between the computed and experimental results obtained for Fe in the literature. It was concluded that the interaction between the metallic Zn and the protonated imidazolidine molecules...

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Tautomeric studies on 2-mercapto pyrimidines and their significance in corrosion process

G. Bereket, C. Öğretir, M. Yaman, E. Hür

Journal of Molecular Structure: THEOCHEM > 2003 > 625 > 1-3 > 31-38

Thermodynamic parameters of some 2-mercapto pyrimidine derivatives were calculated by semi-empirical quantum chemical calculation methods. Full geometry optimization of the molecules in aqueous phase were made and any possible parallelism with the reported experimental data were searched The observed confidence levels of correlations for both tautomerism and corrosion process were satisfactory.

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Quantum chemical studies on some imidazole derivatives as corrosion inhibitors for iron in acidic medium

G. Bereket, E. Hür, C. Öğretir

Journal of Molecular Structure: THEOCHEM > 2002 > 578 > 1-3 > 79-88

In this work, computational studies on some imidazole derivatives which behave as corrosion inhibitors at various levels for iron in hydrochloric acid were carried out in gaseous and aqueous phases using semiemprical methods such as MINDO/3, MNDO, PM3 and AM1. Possible correlations between experimentally obtained inhibition efficiencies and calculated highest occupied molecular energy level (E ...

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Quantum mechanical calculations on some 4-methyl-5-substituted imidazole derivatives as acidic corrosion inhibitor for zinc

G. Bereket, C. Öğretir, A. Yurt

Journal of Molecular Structure: THEOCHEM > 2001 > 571 > 1-3 > 139-145

Gas phase quantum chemical calculations for the efficiency of some imidazole derivatives as corrosion inhibitors, along with the relative stability and proton affinity determination were performed by means of the AM1, PM3, MINDO/3 and MNDO semi-empirical SCF molecular orbital methods. The agreement with the experimental data was found to be satisfactory.

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The inhibition effect of amino acids and hydroxy carboxylic acids on pitting corrosion of aluminum alloy 7075

G. Bereket, A. Yurt

Corrosion Science > 2001 > 43 > 6 > 1179-1195

Pitting corrosion of aluminum alloy 7075 in 0.05 M NaCl solution at pH values of 4, 5, 7 and 8 were examined by potentiostatic method. It was found that addition of 10 ⁻² M hydroxy carboxylic acids or amino acids to NaCl solutions cause shifting of E _pit values to noble directions. Amino acids are more effective in shifting E _pit values to noble directions in acidic solutions...

article

Quantum chemical studies of some pyridine derivatives as corrosion inhibitors

C Öğretir, B Mihçi, G Bereket

Journal of Molecular Structure: THEOCHEM > 1999 > 488 > 1-3 > 223-231

Quantum chemical study of the efficiency of some pyridine derivatives as corrosion inhibitors were performed by means of AM1, PM3, MINDO/3 and MNDO semi-empirical SCF molecular orbital methods. The agreement with the experimental data was found to be satisfactory.

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Search results for: G. Bereket

Dynamic electrochemical impedance spectroscopy and polarization studies to evaluate the inhibition effect of benzotriazole on copper‐manganese‐aluminium alloy in artificial seawater

Quantum chemical studies on inhibition effect of amino acids and hydroxy carboxylic acids on pitting corrosion of aluminium alloy 7075 in NaCl solution

Effect of Schiff Bases Containing Pyridyl Group as Corrosion Inhibitors for Low Carbon Steel in 0.1 M HCl

Investigation on some Schiff bases as HCl corrosion inhibitors for carbon steel

Quantum chemical studies on the inhibition efficiencies of some piperazine derivatives for the corrosion of steel in acidic medium

A theoretical approach to search inhibition mechanism of corrosion via metal–ligand interaction for some imidazole derivatives

A theoretical search on metal–ligand interaction mechanism in corrosion of some imidazolidine derivatives

Tautomeric studies on 2-mercapto pyrimidines and their significance in corrosion process

Quantum chemical studies on some imidazole derivatives as corrosion inhibitors for iron in acidic medium

Quantum mechanical calculations on some 4-methyl-5-substituted imidazole derivatives as acidic corrosion inhibitor for zinc

The inhibition effect of amino acids and hydroxy carboxylic acids on pitting corrosion of aluminum alloy 7075

Quantum chemical studies of some pyridine derivatives as corrosion inhibitors

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