Browsing by Author "Sigircik, Gokmen"

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Citation - WoS: 16
Citation - Scopus: 15
Inhibition Efficiency of Pyrazinecarboxylic Acid on Mild Steel in Acidic Environment
(Taylor & Francis Ltd, 2021) Kelesoglu, Aysen; Sigircik, Gokmen; Yildiz, Resit; Dehri, Ilyas; Yıldız, Reşit; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Pyrazinecarboxylic acid (PCA) was examined as a potential corrosion inhibitor for mild steel (MS) in 0.5 M HCl environment. The methods of electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), as well potentiodynamic (PD) polarization were utilized. Furthermore, atomic force microscopy (AFM) and quantum chemical calculations were utilized. PD polarization curves demonstrated that PCA exhibited mixed inhibitor behavior. Scanning electron microscopy (SEM) offered the creation of an adsorptive layer on the surface of MS which prevented the steel against corrosive specimens. Furthermore, density functional theory (DFT) presented good agreement with electrochemical experimental results. The adsorption equilibrium constant (k(ads)) value was calculated to be 3.704 x 10(4) M-1 which was related to a high proportion of inhibitor on the surface. In the presence of 1.0 mM PCA, inhibition efficiency was determined as 95.2% from EIS results.
Citation - WoS: 3
Citation - Scopus: 4
lavandula Angustifolia Extract as a Green Corrosion Inhibitor for Protection of Mild Steel in Hcl Acid Solution
(Maik Nauka/interperiodica/springer, 2024) Arslanhan, Selim; Sigircik, Gokmen; Yildiz, Resit; Baran, Mehmet Firat; Yıldız, Reşit; Baran, Mehmet Fırat; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü; Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
A new Lavandula angustifolia extract was prepared to investigate the anti-corrosion effect against mild steel in corrosive environment. Inhibitory performance of green extract was examined in detail with electrochemical, morphological, as well as quantum chemical calculation analyses. The effects of inhibitor concentration and exposure time were examined to describe the inhibition behavior. Physical and chemical adsorption kinds happen between the surface of the steel and Lavandula angustifolia extract. Furthermore, surface analysis studies were applied to justify the formation of protective adsorption coating occurred on the surface of steel. Quantum chemical calculation results are also in good consistent with other experimental outcomes.
Citation - WoS: 14
Citation - Scopus: 16
Protection of Mild Steel From Corrosion in Hcl Solution Via Green Rumex Acetosella Extract: Experimental and Theoretical Studies
(Elsevier, 2024) Arslanhan, Selim; Sigircik, Gokmen; Yildiz, Resit; Baran, Mehmet Firat; Yıldız, Reşit; Baran, Mehmet Fırat; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü; Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
The efficiency and potential of green Rumex acetosella extract (RAE) RAE ) on the inhibition of the mild steel (MS) corrosion were investigated in the acidic environment. The high inhibitive capability of RAE on the mild steel was studied by electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) techniques. In addition, potentiodynamic (PD) polarization measurements were carried out to examine corrosion mechanism. The achieved electrochemical tests showed that RAE has a significant inhibition effect on mild steel corrosion. The results of surface analysis recorded by scanning electron microscopy (SEM), and atomic force microscopy (AFM) depicted that RAE provide strong protective layer on the steel surface via adsorptive groups. The inhibition efficiency was calculated as 99.7 %, and 99.6 % from LPR and EIS after 120 h exposure time. Adsorption free energy ( Delta G oads ) value is found as-29.79 kJ mol-1,- 1 , indicating that both physical and chemical adsorptions occur. Furthermore, the obtained experimental findings were supported with quantum chemical calculation results.