TY  - JOUR
AU  - Lebrini, M.
AU  - Robert, F.
AU  - Blandinieres, P.A.
AU  - Roos, C.
PY  - 2011//
TI  - Corrosion Inhibition by Isertia coccinea Plant Extract in Hydrochloric Acid Solution
T2  - Int. J. Electrochem. Sci.
JO  - International Journal of Electrochemical Science
SP  - 2443
EP  - 2460
VL  - 6
IS  - 7
PB  - Electrochemical Science Group
KW  - Isertia coccinea
KW  - corrosion inhibitors
KW  - C38 steel
KW  - acidic media
KW  - adsorption
N2  - The effect of alkaloids extracted from Isertia coccinea plant (AEIC) on the corrosion of C38 steel in 1 M hydrochloric acid was investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. Potentiodynamic polarization curves indicated that the extract behave as mixed-type inhibitor. The experimental data obtained from EIS method show a frequency distribution and therefore a modelling element with frequency dispersion behaviour, a constant phase element (CPE) has been used. The inhibition efficiencies of the extract calculated by three methods show the same tendency. Inhibition was found to increase with increasing concentration of the plant extract. The results obtained show that the extract solution of the plant could serve as an effective inhibitor for the corrosion of C38 steel in hydrochloric acid solution. The apparent activation energy of the process taking place in inhibitor presence was determined on the ground of four temperature values in the range from 25 degrees C to 55 degrees C using the data obtained by two independent methods. Theoretical fitting of different isotherms, Langmuir, Temkin and Frunkin, were tested to clarify the nature of adsorption.
SN  - 1452-3981
L1  - http://php.ecofog.gf/refbase/files/lebrini/2011/324_Lebrini_etal2011.pdf
N1  - ISI:000292331400014
ID  - Lebrini_etal2011
ER  -