Browsing by Author "Keleşoğlu, Ayşen"

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Citation - WoS: 22
Citation - Scopus: 24
1-(2-Hydroxyethyl)-2-imidazolidinone as corrosion inhibitor of mild steel in 0.5 M HCl solution: thermodynamic, electrochemical and theoretical studies
(Journal of Adhesion Science and Technology, 2019) Keleşoğlu, Ayşen; Yıldız, Reşit; Dehri, İlyas; Yıldız, Reşit; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
The inhibition effect of 1-(2-Hydroxyethyl)-2-imidazolidinone (2-HEI) on mild steel (MS) corrosion in 0.5M HCl solution was investigated at different inhibitor concentration and temperature by electrochemical experiments, such as linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and quantum chemical calculations. The inhibitor adsorption process on mild steel in 0.5M HCl system was studied at different temperatures (20 C–50 C). Furthermore, the surface morphology of MS was also investigated with SEM in the absence and the presence of inhibitor. The adsorption of 1-(2-Hydroxyethyl)-2-imidazolidinone on MS surface is an exothermic process and this process obeys the Langmuir adsorption isotherm. The Quantum chemical findings are good agreed with the empirical data.
Corrosion Inhibition Performance of Pyrazinecarboxylic acid on Mild Steel in 0.5 M HCl
(4rd Internatıonal Turkıc World Conference on Chemıcal Scıences and Technologıes (ITWCCST2018),, 2018) Keleşoğlu, Ayşen; Yıldız, Reşit; Dehri, İlyas; Yıldız, Reşit; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
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Citation - WoS: 12
Citation - Scopus: 15
Experimental and theoretical investigation of pyrazinecarboxamide against mild steel corrosion
(Journal of Dispersion Science and Technology, 2021) Keleşoğlu, Ayşen; Sığırcı, Gökmen; Yıldız, Reşit; Dehri, İlyas; Yıldız, Reşit; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Pyrazinecarboxamide was examined against mild steel corrosion in 0.5 M HCl solution. The electrochemical techniques like electrochemical impedance spectroscopy, linear polarization resistance and potentiodynamic polarization measurements were carried out in the presence of various concentrations of pyrazinecarboxamide ranging from 0.25 mM to 1.0 mM. The inhibition effect of pyrazinecarboxamide on the mild steel surface was studied by atomic force microscopy and scanning electron microscopy. The adsorption of this inhibitor was determined to fit Langmuir adsorption isotherm. The adsorption/desorption equilibrium constant was calculated as 2.985 × 104 M−1, indicating that high proportion of pyrazinecarboxamide takes place on mild steel surface. The inhibition efficiency was found as 93.5% from electrochemical impedance spectroscopy measurement in an acid solution containing 1.0 mM pyrazinecarboxamide. Quantum chemical parameters that were in good agreement with experimental results were determined by density functional theory.