Evaluation of a New Formulation Derived from Aleurites moluccana Seeds Oil as a Green Corrosion Inhibitor for Iron in Acidic Medium

The aim of this work is to characterize the seed oil of Aleurites moluccana and to develop a new formulation based on this oil (noted as “ALM”), which was used as a green corrosion inhibitor for iron in acidic solution. The fatty acid composition was determined using the chromatography gas GC/MS analysis. The Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements were carried out for different concentrations of the ALM formulation, immersion times and rotation speeds. The surface analyses was performed by scanning electron microscopy (SEM) coupled with the energy dispersive X-Ray analysis (EDX). The results showed that the seeds oil of Aleurites moluccana was principally composed of unsaturated fatty acids (Oleic, Linoleic and Linoleinic acids) reached a value of 88%. The inhibition efficiency increases with increasing of concentration to attain a value of 97% at 250 ppm of the ALM formulation and acts as a mixed type inhibitor. This efficiency is reinforced by increasing immersion time and the rotation speeds values of the working electrode