Electro-oxidation Behaviour and Passivation Potential of Natural Oil as Corrosion Inhibitor in Hydrochloric Acid Environment

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...

Full description

Saved in:
Bibliographic Details
Published in:International journal of electrochemical science 2013-11, Vol.8 (11), p.12088-12096
Main Authors: Fayomi, O.S.I., Abdulwahab, M., Popoola, A.P.I.
Format: Article
Language:English
Subjects:
Arachishypogeae
Inhibitor efficiency
SEM-EDS
thin film
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)13246-9