Inhibition effect of alkaloids extract from Annona Squamosa plant on the corrosion of C38 steel in normal hydrochloric acid medium

Abstract : In this work, an alkaloids extract from Annona squamosa plant have been studied as possible corrosion inhibitor for C38 steel in molar hydrochloric acid (1 M HCl). Potentiodynamic polarization and AC impedance methods have been used. The corrosion inhibition efficiency increases on increasing plant extract concentration. Polarisation studies showed that Annona squamosa extract was mixed-type inhibitor in 1 M HCl. The inhibition efficiency of Annona squamosa extract was temperaturedependent and its addition led to an increase of the activation corrosion energy revealing a physical adsorption between the extract and the metal surface. The adsorption of the Annona squamosa extractfollowed Langmuir’s adsorption isotherm. The inhibitive effect of Annona squamosa is ascribed to the presence of organic compounds in the extract. The examined extract is considered as non-cytotoxic substance.
Type de document :
Article dans une revue
International journal of electrochemical science, 2010, pp.1698-1712
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Soumis le : jeudi 11 décembre 2014 - 15:25:51
Dernière modification le : mercredi 10 octobre 2018 - 14:28:16

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  • HAL Id : hal-01094042, version 1

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M. Lebrini, Florent Robert, C. Roos. Inhibition effect of alkaloids extract from Annona Squamosa plant on the corrosion of C38 steel in normal hydrochloric acid medium. International journal of electrochemical science, 2010, pp.1698-1712. 〈hal-01094042〉

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