Baphia nitida Leaves Extract as a Green Corrosion Inhibitor for the Corrosion of Mild Steel in Acidic Media. (4th August 2014)

• Record Type: Journal Article
• Authors: Njoku, V. O.; Oguzie, E. E.; Obi, C.; Ayuk, A. A.
• Other Names: Mornar Ana Academic Editor.
• Is Part Of: Advances in chemistry. Volume 2014(2014)
• Publication Date: 2014-08-04
• Subjects: Chemistry -- Periodicals; Chemistry; Periodicals; 540
• DOI: 10.1155/2014/808456
• Languages: English
• ISSNs: 2356-6612

Abstract

Abstract : The inhibiting effect of Baphia nitida (BN) leaves extract on the corrosion of mild steel in 1 M H2 SO4 and 2 M HCl was studied at different temperatures using gasometric and weight loss techniques. The results showed that the leaves extract is a good inhibitor for mild steel corrosion in both acid media and better performances were obtained in 2 M HCl solutions. Inhibition efficiency was found to increase with increasing inhibitor concentration and decreasing temperature. The addition of halides to the extract enhanced the inhibition efficiency due to synergistic effect which improved adsorption of cationic species present in the extract and was in the order KCl < KBr < KI suggesting possible role of radii of the halide ions. Thermodynamic parameters determined showed that the adsorption of BN on the metal surface is an exothermic and spontaneous process and that the adsorption was via a physisorption mechanism.