Electro-oxidation behaviour and passivation potential of natural oil as corrosion inhibitor in hydrochloric acid environment.
Fayomi, O. S. I Abdulwahab, M. Popoola, A. P. I.
Fayomi, O. S. I
Abdulwahab, M.
Popoola, A. P. I.
Citations
Altmetric:
Abstract
The electro-oxidation behaviour and passivation potential of natural oil (Arachis hypogeae) as corrosion inhibitors for mild steel in 2M HCl solution have been studied using gravimetric and electrochemical techniques. The surface morphology of as-corroded samples was assessed with scanning electron microscopy equipped with energy dispersive spectroscopy (SEM-EDS). The results revealed that corrosion rate of mild steel with Arachis hypogea in HCl environment decreased with
exposure time. In the gravimetric method, an inhibitor efficiency of 72.69, 75.19 and 47.07% were obtained at 50/20/50%v/v Arachis hypogeae addition respectively in 2M HCl solution for 12, 24 and 36h exposure time. Results from the linear polarization indicate a higher potential value and %IE of 94.99 for 100%v/v Arachis hypogeae with an increase in the polarization resistance (Rp) and lower current density for the inhibited samples than the uninhibited mild steel. There was an agreement with the methods used for the corrosion evaluation of mild steel-Arachis hypogeae in 2M HCl solution.
Description
Date
2013-09-22
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Research Projects
Organizational Units
Journal Issue
Keywords
Arachishypogeae, Inhibitor efficiency, SEM-EDS, Thin film