Title of article :
Corrosion inhibition of carbon steel in 1 M H2SO4 solution by Thapsia villosa extracts
Author/Authors :
kalla, a. universite larbi tebessi - laboratoire des molecules bioactives et applications, Algeria , benahmed, m. universite larbi tebessi - laboratoire des molecules bioactives et applications, algeria , djeddi, n. universite larbi tebessi - laboratoire des molecules bioactives et applications, Algeria , akkal, s. universite mentouri constantine - faculte de sciences exactes - departement de chimie, laboratoire de phytochimie et analyses physicochimiques et biologiques, Algeria , laouer, h. université ferhat abbas de sétif - departement de biologie et d’ecologie vegetale, laboratoire de valorisation des ressources naturelles biologiques, Algeria
Abstract :
Ethyl acetate extract (EAE) and butanolic extract (BE) of Thapsia villosa were investigated as corrosion inhibitors of Carbon Steel (CS) in 1 M H2SO4 using electrochemical impedance spectroscopy (EIS) techniques, potentiodynamic polarization and weight loss measurements. The effect of temperature on the corrosion behavior of CS was studied in the range of 20–40 ◦C. The experimental results show that EAE and BE are good corrosioninhibitors and the protection efficiency increased with increasing concentration of the extracts, but decrease with rise in temperature. The EAE and BE act as a mixed types inhibitors. The adsorption of extracts on CS surface follow Langmuir isotherm. The apparent energies, enthalpies and entropies of the dissolution process were discussed.
Keywords :
Carbon steel , Corrosion , EIS , Potentiodynamic polarization , Plant extract , Weight loss
Journal title :
International Journal of Industrial Chemistry (IJIC)
Journal title :
International Journal of Industrial Chemistry (IJIC)
