Evaluation of Inhibitory Effect of the Methanolic Extract of the Two Parts from Anabasis Aretioides Plant Against the Corrosion of E 24 Steel in a Neutral Solution NaCl 3.5%

In this study, the photochemical compositions of the methanolic extracts of the leaves and root parts from the Anabasis aretioides were determined, as well as the evaluation of their effect as a green corrosion inhibitor of mild steel (E24) in a neutral solution (NaCl 3.5%). The photochemical screening performed for the methanolic extracts showed the presence of the polyphenols, tannins, alkaloids, reducing compounds and trace amounts of the proteins, carotenoids, coumarins and cardiac glycosides. The electrochemical study was carried out by using the polarization measurements and electrochemical impedance technique. The analyzing of the surface of the metal was carried out by the scanning electron microscope (SEM) coupled with the EDS. The inhibition efficiency increased with increasing the concentrations and reached the values of 86 and 87% respectively for the 10% concentration of methanolic extracts from the leaves and root parts of the Anabasis aretioides plant. The both inhibitors act as a mixed type, with the predominance of the cathodic efficiency for the leaves extract and the anodic efficiency for root extract.