Author/Authors :
Manssouri, Mounir Moulay Ismail University of Meknes - Laboratory of Natural Substances & Synthesis and Molecular Dynamics - Faculty of Sciences and Techniques - BP 509 - 52000 - Errachidia, Morocco , Znini, Mohamed Moulay Ismail University of Meknes - Laboratory of Natural Substances & Synthesis and Molecular Dynamics - Faculty of Sciences and Techniques - BP 509 - 52000 - Errachidia, Morocco , El Ouadi, Yassir Laboratory of Analytical Chemistry - Materials and Environment (LC2AME) - Faculty of Sciences - University of Mohammed Premier - B.P. 717 - 60000 Oujda - Morocco , Laghchimi, Amal Moulay Ismail University of Meknes - Laboratory of Natural Substances & Synthesis and Molecular Dynamics - Faculty of Sciences and Techniques - BP 509 - 52000 - Errachidia, Morocco , Ouakki, Moussa Laboratory of Materials Engineering and Environment - Modelling and Application - Faculty of Science - University Ibn Tofail - BP 133 - 14000 Kenitra - Morocco , Majidi, Lhou Moulay Ismail University of Meknes - Laboratory of Natural Substances & Synthesis and Molecular Dynamics - Faculty of Sciences and Techniques - BP 509 - 52000 - Errachidia, Morocco
Abstract :
The corrosion inhibition and adsorption (CIA) performance of the aqueous extracts of Aaronsohnia pubescens aerial parts (Odorized aqueous extract (OE) and Deodorized aqueous extract (DE)) on the corrosion mild steel (MS) in 1M hydrochloric acid were evaluated. It is based on the weight loss (WL) analysis, kinetic and thermodynamic parameters, and electrochemical methods both stationary (Potentiodynamic polarization (PDP)) and transient (Electrochemical impedance spectroscopy (EIS)). The inhibition efficiency of inhibitors increases for the concentration of 1.5 g/L; reaching a high value of 93.11 and 87.88 % in 1 M HCl solution at 308 K for OE and DE, respectively. The thermodynamic kinetic parameters showed that the adsorption of OE and DE on the MS surface follows the Langmuir adsorption isotherm. Furthermore, PDP measurements exhibited that the studied of each inhibitor performs as a mixed-type inhibitor. OE shows itself to be the best aqueous extract of Aaronsohnia pubescens aerial parts to prevent against the corrosion of mild steel.
Keywords :
Aaronsohnia pubescens , Aqueous extracts , Mild Steel , Corrosion inhibition
