Pistacia lentiscus L. Essential Oils as a Green Corrosion Inhibitors for Iron in Neutral Chloride Media

The essential oils of aromatic and medicinal plants are ones of the green corrosion inhibitors they are most valuable environmentally friendly, biodegradable in nature and are synthesis by simple procedure with a low cost. This paper concentrates on the corrosion inhibitory properties of the essential oils: Effect on iron corrosion in neutral chloride media (3% NaCl solution). The essential oils was obtained from twigs, leaves and fruits of Pistacia lentiscus L. (PL), collected in two different regions (Melloussa (MS) and Moulay Idriss Zerhoun (MIZ)) of Morocco. The PL essential oils effect against the corrosion of iron in 3% NaCl solution was carried out using the weight loss, as well as electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) curves. Among tested essential oils, the best inhibitive effect was obtained for essential oil of PL twigs from MIZ. Indeed, the optimum inhibition efficiency 81.45% was achieved in the presence of 3000 ppm inhibitor. The results obtained from different techniques used in this research are in very good agreement and revealed that PL essential oils could serve as a source of green corrosion inhibitors on iron in 3% NaCl solution.