TITLE:
Origanum majorana Extracts as Mild Steel Corrosion Green Inhibitors in Aqueous Chloride Medium
AUTHORS:
Hassen Challouf, Nébil Souissi, Mhamed Ben Messaouda, Rym Abidi, Adel Madani
KEYWORDS:
Origanum majorana, Corrosion, Inhibition, Mild Steel, NaCl
JOURNAL NAME:
Journal of Environmental Protection,
Vol.7 No.4,
March
23,
2016
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
(ΔaH) as well as the activation
entropy (ΔaS). 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.