TITLE:
A Study of Eruca vesicaria, Bromelia hemisphaerica and Erythrina americana as Green Corrosion Inhibitors for Carbon Steel in Sulfuric Acid
AUTHORS:
M. J. Garcia-Ramirez, G. F. Dominguez Patiño, J. G. Gonzalez-Rodriguez, M. L. Dominguez-Patiño, J. A. Dominguez-Patiño
KEYWORDS:
Acid Corrosion, Green Inhibitors, Electrochemical Techniques
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.6 No.2,
February
19,
2016
ABSTRACT: A study of Eruca vesicaria, Bromelia hemisphaerica and Erythrina
americana as eco-friendly corrosion inhibitors for 1018
carbon steel in 0.5 M H2SO4 has been carried out by using
weight loss tests, potentiodynamic polarization curves and electrochemical
impedance spectroscopy measuremnts. Results have shown that the three extracts
performed as good corrosion inhibitors, but the Eruca vesicaria exhibited the best performance followed by Erythrina americana. The three
inhibitors formed a protective, passive film which protected the steel from
corrosion. This was because they contain antioxidants present in their
molecular structure with heteroatoms such as N, C and O like phenols, amino
acids, etc., which react with metal and environment to
form the protective film.