Surface Analysis of Inhibitor Film Formed by 4-Amino-N-(1,3-thiazol-2-yl) Benzene Sulfonamide on Carbon Steel Surface in Acidic Media |
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| Authors: | Adriana Samide Bogdan Tutunaru Catalin Negrila Ioana Prunaru |
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| Institution: | 1. Faculty of Chemistry, University of Craiova , Craiova , Romania samide_adriana@yahoo.com;3. Faculty of Chemistry, University of Craiova , Craiova , Romania;4. National Institute of Materials Physics , Bucharest , Romania |
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| Abstract: | Inhibitive properties of the antibacterial sulfa drug sulfathiazole—IUPAC name being 4-amino-N-(1,3-thiazol-2-yl) benzene sulfonamide—on the corrosion of carbon steel in 1.0 M HCl solution were investigated using weight loss measurements, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Sulfathiazole is a good adsorption inhibitor, and the inhibition efficiency increases with increasing concentration. Adsorption is spontaneous and is best described by Temkin isotherm. XPS analysis showed, at this stage, that the main product of corrosion is a nonstoichiometric Fe3+ oxide/oxyhydroxide consisting of a mixture of Fe2O3, α, and γ-FeO(OH) and/or Fe(OH)3, where α, γ-FeO(OH) is the main phase. |
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| Keywords: | carbon steel corrosion inhibition EIS SEM weight loss XPS |
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