Characterization of Dwarf Palm Leaf Extract (DPLE) (Chamaerops Humilis L. Extract) as an Eco-Friendly Corrosion Inhibitor for Carbon XC70 Steel in a 3.5% NaCl Solution

In the present work dwarf palm leaf extract (DPLE) has been prepared to be used as a corrosion inhibitor on carbon steel in a saline medium.The inhibitory efficiency of DPLE on the corrosion rate of carbon XC70 steel (CS) in a 3.5% NaCl solution has been studied by means of weight loss measurements, potentiodynamic polarization curves, electrochemical impedance spectroscopy, SEM and AFM microscopies.The results showed that the corrosion inhibition rate of carbon XC70 steel in the NaCl solution increases with the concentration of DPLE, and reaches up to 90% at 2.010 -4 g.L -1 as the optimum concentration of DPLE.The inhibiting performance against corrosion was attributed to the formation a DPLE barrier that reduces the contact area between the carbon XC70 steel and the corrosive solution.The EIS analysis revealed that the presence of DPLE was found to decrease the double layer capacitance, with an increasing charge transfer resistance.The morphological analysis showed that upon adding DPLE in saline solution, the surface morphology of the metal becomes smoother due to the formation a protective layer adsorbed on the metal surface.This study showed that dwarf palm leaf extract acts as an efficient and eco-friendly inhibitor on carbon steel in saline medium.