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The effect of temperature and concentration on the inhibition of acid corrosion of carbon steel by newly synthesized Schiff base    
Yazarlar
Gürten A Ali
Hülya Keleş
Emel Bayol
Prof. Dr. Fatma KANDEMİRLİ Prof. Dr. Fatma KANDEMİRLİ
Kastamonu Üniversitesi, Türkiye
Özet
Inhibition effect of Schiff base namely 1-(2-hydroxybenzylidene)-3-(2,5-dioxoimidazolidin-4-yl) urea (ALS) was studied on carbon steel corrosion in 1.0M HCl by using the electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and linear polarization (LPR) and quantum chemical study. The values of activation energy (Ea), equilibrium constant (Kads), adsorption free energy δG°ads, adsorption enthalpy δH°ads and adsorption entropy δS°ads were discussed. The adsorption of inhibitor on metal followed Langmuir's adsorption isotherm. The thermodynamic parameters of adsorption reveal that there is a strong interaction between inhibitor and carbon steel. The highest inhibition efficiency was observed 5.0×10-4M ALS concentration at 318K. SEM and EDX observations confirmed the existence of protective inhibitor film on metal surface. Quantum chemical study supports the comparative inhibition effect of ALS.
Anahtar Kelimeler
AFM | Carbon steel | Corrosion | Modeling study | Schiff base | Temperature
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Journal of Industrial and Engineering Chemistry
Dergi ISSN 1226-086X
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce
Basım Tarihi 07-2015
Cilt No 27
Sayı 1
Sayfalar 68 / 78
Doi Numarası 10.1016/j.jiec.2014.11.046
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S1226086X14006868