TY  - JOUR
AU  - Suedile, F.
AU  - Robert, F.
AU  - Roos, C.
AU  - Lebrini, M.
PY  - 2014//
TI  - Corrosion inhibition of zinc by Mansoa alliacea plant extract in sodium chloride media: Extraction, Characterization and Electrochemical Studies
T2  - Electrochim Acta
JO  - Electrochimica Acta
SP  - 631
EP  - 638
VL  - 133
PB  - Elsevier Ltd
KW  - Corrosion
KW  - Inhibition
KW  - Mansoa alliacea
KW  - sodium chloride
KW  - zinc
N2  - Ethanol extract of Mansoa alliacea was tested as corrosion inhibitor for zinc in NaCl 3% media using polarization and electrochemical impedance spectroscopy (EIS). Potentiodynamic polarization curves indicated that the plant extract behaves as mixed-type inhibitor. Impedance measurements showed that there are two phenomena in the process of inhibition. The results obtained show that this plant extract could serve as an effective inhibitor for the corrosion of zinc in NaCl 3% media. The extract obtained give inhibition around 90%. The experimental data obtained from EIS method show a frequency distribution and therefore a modelling element with frequency dispersion behaviour, a constant phase element (CPEα,Q) has been used. Graphical methods are illustrated by synthetic data to determine the parameter of CPE (α, Q). Polarization curves show that Mansoa alliacea extract affects the anodic and cathodic reactions and the corrosion potential values were shifted to the positive potentials in the presence of the crude extract. Studies on the phytochemical constituents of the total extract were also established. Electrochemical studies, on the chemical families present in the crude extract, were also carried out to find the main constituents responsible for corrosion inhibition properties of the plant extract. © 2014 Elsevier Ltd.
SN  - 00134686 (Issn)
UR  - http://www.scopus.com/inward/record.url?eid=2-s2.0-84901941096&partnerID=40&md5=ac6e12b33be8ca2293390c46392cac4a
N1  - Export Date: 18 June 2014; Coden: Elcaa; Correspondence Address: Lebrini, M.; Laboratoire Matériaux et Molécules en Milieux Amazonien, UAG – UMR ECOFOG Campus Troubiran, Route de Baduel, 97337 Cayenne, French Guiana; email: mounim.lebrini@guyane.univ-ag.fr
ID  - Suedile_etal2014
ER  -