Abstract

BARBOUCHI, M.; BENZIDIA, B.; IDRISSI, M. El  and  CHOUKRAD, M.. Iron Corrosion Green Inhibition in a 3% NaCl Solution, by Leaves Extract from Pistacia Terebinthus L. Growing Wild in Morocco. Port. Electrochim. Acta [online]. 2020, vol.38, n.3, pp.175-184. ISSN 0872-1904.  https://doi.org/10.4152/pea.202003175.

In the present paper, the methanol extract from the leaves of Pistacia terebinthus L. (PT) was characterized by GC/MS analysis. It was tested as a corrosion inhibitor for iron in a 3% NaCl solution, using gravimetric measurements and electrochemical methods (potentiodynamic polarizations and electrochemical impedance spectroscopy). Fourteen compounds were identified; the major compounds are palmitic acid (31.5%), stearic acid (25.7%) and oleic acid (11.3%). The data showed that the tested extract offers good corrosion resistance. The constituents of the PT extract affected polarization resistance (R_p) and corrosion current density (i_corr), demonstrating that the proposed inhibitor hinders corrosion reactions. The results obtained at 200 ppm are very interesting, and reach maximum values of ?? 96.96%, 89% and 64.82%, respectively, which were confirmed by scanning electron microscopy (SEM), coupled with energy scattering of X-ray spectroscopy (EDX).

Keywords : Pistacia terebinthus L.; GC/MS; corrosion inhibitor; iron.

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