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Title: | Experimental and theoretical study of the effect of some heterocyclic compounds on the corrosion of low carbon steel in 3.5% NaCl medium | Authors: | Şahin, M. Gece, G. Karcı, Fikret. Bilgiç, S. |
Keywords: | Corrosion Heterocyclic compounds Inhibitor Steel Theoretical calculations Computation theory Concentration (process) Corrosion inhibitors Extrapolation Sodium chloride Corrosion parameters Carbon steel |
Publisher: | Springer Netherlands | Abstract: | The efficiency of three heterocyclic compounds, 3-amino-1,2,4-triazole, 4-hydroxy-2H-1-benzopyran-2-one and 4-hydroxy-3-(1H-1,2,4-triazole-3-ylazo)-2H- 1-benzopyran-2-one (abbreviated 3-ATA, 4-HQ and 3-ATA-Q, respectively) as steel corrosion inhibitors in 3.5% NaCl has been investigated by Tafel extrapolation and linear polarization methods. Corrosion parameters and adsorption isotherms were determined from current-potential curves. It was found that inhibition efficiencies (?%) and surface coverage (?) increase with an increase in the concentration of 3-ATA and 3-ATA-Q. However, 4-HQ accelerates the corrosion rate as its concentration increases. The adsorption of 3-ATA and 3-ATA-Q on the steel surface obey Langmuir isotherm. A clear correlation was found between corrosion inhibition efficiency and theoretical parameters obtained by the density functional B3LYP/6-31g(d) method. The experimental results are supported by the theoretical data. © 2008 Springer Science+Business Media B.V. | URI: | https://hdl.handle.net/11499/7321 https://doi.org/10.1007/s10800-008-9517-3 |
ISSN: | 0021-891X |
Appears in Collections: | Fen-Edebiyat Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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