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

Type : Article de conférence
Auteur(s) :  S. Issaadi, T. Douadi, S. Chafaa
Année :  2014
Domaine : Electronique
Conférence: The 4th International Conference on Welding, Non Destructive Testing and Materials and Alloys Industry (IC-WNDT-MI’14)
Lieu de la conférence:  Annaba, Algeria
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