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Experimental and quantum chemical studies on corrosion inhibition performance of synthesized Schiff base for mild steel in acidic media

Auteurs : S. Issaadi, T. Douadia and S. Chafaa
Année : 2014
Domaine : Electronique
Type : Communication
Conférence: Conférence Internationale sur le Soudage, le CND et l’Industrie des Métaux, IC-WNDT-MI’14
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : Mild steel, corrosion inhibition, adsorption isotherm, Quantum chemical studies

Résumé :

The effect of synthesized Schiff base 4,4’-bis(2-carboxaldehyde thiophene) diphenyl diimino ethane (L) on the corrosion of mild steel in acidic media 1 M HCl has been investigated using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. These studies have shown that (L) is a good corrosion inhibitor for mild steel in 1M HCl. The adsorption of inhibitor on mild steel surface was found to follow Langmuir isotherm model and the adsorption isotherm parameters (Kads, ΔG0ads) were determined. Quantum chemical calculations were further applied to reveal the adsorption structure and explain the experimental results