Schiff's base derived from 2-acetyl thiophene as corrosion inhibitor of steel in acidic medium. Issue 5 (1st September 2016)

• Record Type: Journal Article
• Authors: Aouniti, A.; Elmsellem, H.; Tighadouini, S.; Elazzouzi, M.; Radi, S.; Chetouani, A.; Hammouti, B.; Zarrouk, A.
• Is Part Of: Journal of Taibah University for science. Volume 10:Issue 5(2016)
• Page Start: 774
• Page End: 785
• Publication Date: 2016-09-01
• Subjects: Mild steel -- Schiff base -- Corrosion -- Weight loss -- Electrochemical methods -- DFT; Science -- Periodicals; Science; Periodicals; 505
• DOI: 10.1016/j.jtusci.2015.11.008
• Languages: English
• ISSNs: 1658-3655

Abstract

Abstract: The adsorption and corrosion inhibition behavior of ( E )-2-methyl-N-(thiophen-2-ylmethylidene)aniline (T ) at steel/1.0 M HCl interface was investigated using gravimetric and electrochemical methods at 308 K. Inhibition efficiency increased with increase in the concentration of new synthesized Tiophene Schiff base. The potentiodynamic polarization studies revealed that this compound as mixed-type inhibitor. Data, obtained from EIS measurements, were analyzed to model the corrosion inhibition process through appropriate equivalent circuit model; a constant phase element (CPE) has been used. The inhibition was assumed to occur via adsorption of the components of the Thiophene derivative on the mild steel surface which can be approximated by Langmuir adsorption isotherm model. Quantum chemical parameters are calculated using the density functional theory (DFT) method. Correlation between theoretical and experimental results is discussed.