Steel corrosion inhibition by bupleurum lancifolium (Apiaceae) extract in acid solution
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Date
2014
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
The ethyl acetate extract of the aerial parts of
Bupleurum lancifolium (Apiaceae) is tested as corrosion
inhibitor of carbon steel (API 5L Gr B) in 1.0 M HCl and
0.5 M H2SO4 solutions using weight loss measurement,
electrochemical impedance spectroscopy and potentiodynamic
polarization techniques. The results revealed that the
corrosion inhibition efficiency increases with increasing
extract concentration. Potentiodynamic polarization curves
indicated that the plant extract behaves as a mixed-type
inhibitor. The adsorption of inhibitor on carbon steel surface
was found to follow Langmuir isotherm. The effect of
temperature on the corrosion behavior of API 5L Gr B steel
in acid solutions with and without plant extract was studied
in the range 293–333 K. Surface analyses via scanning
electron microscope shows a significant improvement on
the surface morphology of the steel.
Keywords Corrosion inhibition Carbon steel
Adsorption Bupleurum lancifolium
Description
Keywords
Corrosion inhibition, Carbon steel, Adsorption, Bupleurum lancifolium