Alkaloids extract from Palicourea guianensis plant as corrosion inhibitor for C38 steel in 1 M hydrochloric acid medium

Abstract : Corrosion inhibition effect of alkaloids extract from Palicourea guianensis plant (AEPG) on C38 steel in 1 M HCl medium has been investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. The polarization studies showed that AEPG acts as mixed-type inhibitor. The electrochemical impedance spectroscopy showed that the charge transfer resistance increases and the double layer capacitance decreases on increasing plant extract concentration. The inhibition efficiency of the extract obtained from impedance and polarization measurements was in a good agreement and was found to increase with increasing concentration of the extract. Inhibition efficiency of 89% was achieved with 100 mg L-1 of AEPG at 25 °C. The obtained results showed that, the Palicourea guianensis extract could serve as an effective inhibitor for the corrosion of steel in acid media. The adsorption of AEPG obeys the Langmuir adsorption isotherm.
Type de document :
Article dans une revue
International journal of electrochemical science, 2011, 6, pp.847-859
Liste complète des métadonnées

https://hal-agroparistech.archives-ouvertes.fr/hal-01096655
Contributeur : Carole Legrand <>
Soumis le : mercredi 17 décembre 2014 - 19:35:50
Dernière modification le : mercredi 18 juillet 2018 - 20:11:28

Identifiants

  • HAL Id : hal-01096655, version 1

Collections

Citation

M. Lebrini, Florent Robert, C. Roos. Alkaloids extract from Palicourea guianensis plant as corrosion inhibitor for C38 steel in 1 M hydrochloric acid medium. International journal of electrochemical science, 2011, 6, pp.847-859. 〈hal-01096655〉

Partager

Métriques

Consultations de la notice

137