Author/Authors :
left, d. benmessaoud université hassan ii - faculté des sciences - laboratoire interface matériaux et environnement, Casablanca, Morocco , zertoubi, m. université hassan ii - faculté des sciences - laboratoire interface matériaux et environnement, Casablanca, Morocco , essaqui, a. université hassan ii - faculté des sciences - equipe de chimie agroalimentaire et chimie des substances naturelles végétales et marines, Casablanca, Morocco , khoudali, s. université hassan ii - faculté des sciences - 2equipe de chimie agroalimentaire et chimie des substances naturelles végétales et marines, Casablanca, Morocco , irhzo, a. université hassan ii - faculté des sciences - laboratoire interface matériaux et environnement, Casablanca, Morocco , azzi, m. université hassan ii - faculté des sciences - laboratoire interface matériaux et environnement, Casablanca, Morocco
Abstract :
The aim of this study is to evaluate the behavior of reinforcement steel in simulated concrete pore solution (CPS) in presence of NaCl (0.5M) with and without the methanolic extract of Warionia saharae leaves used as an eco-friendly inhibitor. The investigation was performed essentially by open circuit potential and electrochemical impedance measurements. The phytochemical screening was used to reveal the presence of some active phyto-constituents in the plant extract. Results show that the extract can improve the protection of reinforcement steel in (CPS) and can inhibit the corrosion induced by the chloride ions. Electrochemical impedance spectroscopy tests showed the relatively good inhibition efficiency (≈ 50%) in this alkaline medium. Adsorption of the inhibitor molecules corresponds to Langmuir adsorption isotherm.
Keywords :
Reinforcement steel , Concrete pore solution , Warionia saharae , Eco–friendly inhibitor , Langmuir isotherm
