TITLE:
Corrosion Inhibition of Carbon Steel in Acidic Mediaby Using Actinidia deliciosa (Kiwifruit) Extract
AUTHORS:
M. I. Arias-Montoya, G. F. Dominguez-Patiño, J. G. Gonzalez-Rodriguez, J. A. Dominguez-Patiño, M. L. Dominguez-Patiño
KEYWORDS:
Green Inhibitor, Acidic Corrosion, Electrochemical Techniques
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.5 No.11,
November
17,
2015
ABSTRACT: The corrosion inhibition of 1018 carbon steel in 0.5
M H2SO4 by using Actinidia
deliciosa (Kiwifruit) peel extract has been investigated by using
potentiodynamic polarization curves and electro-chemical impedance
spectroscopy. Two kinds of extracts are investigated, one from the tender, and
another one from ripe Actinidia deliciosa.
Concentrations include 0, 25, 50, 75, and 100 ppm at room temperature. Results
indicate that both kind of extracts acted as good corrosion inhibitors, is more
efficient in the ripe extract. Corrosion inhibition efficiency increases with
increasing its concentration for ripe extract, whereas for the tender Actinidia deliciosa, the higest inhibitor
efficiency is obtained by adding 25 ppm and decresaing with a further increase
in its concentration. Both extracts improve the passive film properties by
decreasing the passive current density values. It is found that the corrosion
inhibition is due to the presence of heteroatoms present in Actinidia deliciosa, mainly quercitine, which
is physically adsorbed in the steel following a Frumkin type of adsorption
isotherm which forms a protective film.