TY  - JOUR
AU  - Chevalier, M.
AU  - Robert, F.
AU  - Amusant, N.
AU  - Traisnel, M.
AU  - Roos, C.
AU  - Lebrini, M.
PY  - 2014//
TI  - Enhanced corrosion resistance of mild steel in 1 M hydrochloric acid solution by alkaloids extract from Aniba rosaeodora plant: Electrochemical, phytochemical and XPS studies
T2  - Electrochim Acta
JO  - Electrochimica Acta
SP  - 96
EP  - 105
VL  - 131
PB  - Elsevier Ltd
KW  - Acidic media
KW  - Adsorption-XPS
KW  - Aniba rosaeodora extract
KW  - Anibine
KW  - C38 steel
KW  - Corrosion inhibitor
N2  - The present report continues to focus on the broadening application of plant extracts for metallic corrosion control and reports on the inhibiting effect of the Aniba rosaeodora alkaloidic extract on the corrosion of C38 steel in 1 M hydrochloric acid. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were applied to study the metal corrosion behavior in the absence and presence of inhibitor. Studies on the phytochemical constituents were established to determine the active(s) molecule(s). XPS was also carried out to establish the mechanism of corrosion inhibition of the active molecule of C38 steel in acid solution. The inhibitor extract acted as an efficient corrosion inhibitor in 1 M HCl. 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 studies showed that the Aniba rosaeodora alkaloidic extract was a mixed-type inhibitor and its inhibition efficiency increased with the inhibitor concentration. Studies on the phytochemical constituents of the total alkaloids extract shows that it contains the anibine as the major alkaloid. The results obtained from the electrochemical study have clearly showed that the inhibition efficiency of the total extract was due to the presence of anibine. The XPS studies showed the formation of inhibitor layer containing the Aniba rosaeodora alkaloidic extract and the anibine molecules. © 2014 Elsevier Ltd. All rights reserved.
SN  - 00134686 (Issn)
UR  - http://www.scopus.com/inward/record.url?eid=2-s2.0-84901188171&partnerID=40&md5=fabd7a48b6b9fd4b2f21fb8636d29d30
N1  - Export Date: 10 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  - Chevalier_etal2014
ER  -