Origanum majorana Extracts as Mild Steel Corrosion Green Inhibitors in Aqueous Chloride Medium - Journal of Environmental Protection

JEP > Vol.7 No.4, March 2016

Journal of Environmental Protection

Volume 7, Issue 4 (March 2016)

ISSN Print: 2152-2197 ISSN Online: 2152-2219

Google-based Impact Factor: 1.15 Citations h5-index & Ranking

Origanum majorana Extracts as Mild Steel Corrosion Green Inhibitors in Aqueous Chloride Medium ()

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Download as PDF (Size: 2928KB) PP. 532-544

DOI: 10.4236/jep.2016.74048 2,367 Downloads 4,053 Views Citations

Author(s)

Hassen Challouf^1,2, Nébil Souissi¹, Mhamed Ben Messaouda³, Rym Abidi², Adel Madani⁴

Affiliation(s)

¹Tunis El Manar University, Institut Préparatoire aux Etudes d’Ingénieurs El Manar, Campus Universitaire El Manar, Tunis, Tunisia.
²Carthage University, Faculté des Sciences de Bizerte, Laboratoire de Recherche “Application de la Chimie aux Ressources et Substances Naturelles et à l’Environnement”, Jarzouna, Tunisia.
³Carthage University, Institut Préparatoire aux Etudes Scientifiques & Techniques, Laboratoire de Recherche “Matériaux, Molécules et Applications”, La Marsa, Tunisia.
⁴Carthage University, Faculté des Sciences de Bizerte, Laboratoire de Physique des Matériaux, Jarzouna, Tunisia.

ABSTRACT

We optimized Origanum majorana (OM) extraction for mild steel corrosion inhibition in neutral 0.5 M chloride medium. The inhibition mechanism evolved in presence of the optimal extract was discussed when calculating the activation energy (Ea), the activation enthalpy (Δ_aH) as well as the activation entropy (Δ_aS). The OM extract molecules were investigated using the density functional theory (DFT) at B3LYP/6-31G(d,p) basis set level. 1-methyl-4-propan-2-ylcyclohexa-1,3-diene alpha-terpinene was predicted exhibiting the most inhibition capabilities.

KEYWORDS

Origanum majorana, Corrosion, Inhibition, Mild Steel, NaCl

Share and Cite:

Challouf, H. , Souissi, N. , Messaouda, M. , Abidi, R. and Madani, A. (2016) Origanum majorana Extracts as Mild Steel Corrosion Green Inhibitors in Aqueous Chloride Medium. Journal of Environmental Protection, 7, 532-544. doi: 10.4236/jep.2016.74048.

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