Inhibition of tinplate corrosion in 0.5 M H2C2O4 medium by Mentha pulegium essential oil

• A. Boumezzourh¹, M. Ouknin¹, E. Chibane¹, J. Costa², A. Bouyanzer³, B. Hammouti³ and L. Majidi¹

¹ Laboratory of Natural Substances Synthesis and Molecular Dynamics, Faculty of Sciences and Techniques, Moulay Ismail University, 52000 Errachidia, Morocco
² Laboratoire des Produits Naturels, Université de Corse, BP 52-20250-France
³ Université Mohamed Premier, Laboratoire de Chimie Appliquée et Environnement, Faculté des Sciences, Oujda, Morocco

Abstract: Considering the great interest of the application of secondary metabolites of medicinal and aromatic plants in several fields, including the control of metal corrosion in different environments and in order to minimize the use of synthetic inhibitors, which is the objective of our research. In this work, we are interested by identifying the chemical profiling of Mentha pulegium essential oil and evaluating its effect as a new solution against corrosion in tinned cans. For this purpose, the inhibitory effect of Mentha pulegium essential oil against tinplate corrosion in 0.5 M H₂C₂O₄ medium was studied using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurement techniques. The CG and CG-Ms show that the Pulegone and the Menthone are the main compounds of Mentha pulegium essential oil. The weight loss measurement and electrochemical tests show that Mentha pulegium essential oil exhibits a good anticorrosion effect with an inhibition efficiency of 80% at 4 g/L^–1. This effect could be attributed to the adsorption of Mentha pulegium essential oil compound on metal surface, which is confirmed by scanning electron microscopy spectroscopy and energy dispersive X-rays (SEM-EDX) visualization.

Keywords: Mentha pulegium, essential oil, canned food, corrosion effect, tinplate, SEM-EDX

Int. J. Corros. Scale Inhib., 2020, 9, no. 1, 152-170 PDF (1 310 K)
doi: 10.17675/2305-6894-2020-9-1-9

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