Azadirachta Indica Extracts as Corrosion Inhibitor for Mild Steel in Acid Medium

作者：Okafor Peter C^*; Ebenso Eno E; Ekpe Udofot J

来源：International Journal of Electrochemical Science, 2010, 5(7): 978-993.

DOI：10.1016/s1452-3981(23)15337-5

• Azadirachta indica
• mild steel
• weight loss
• gasometric method
• acid inhibition
• acid corrosion

The inhibitive action of leaves (LV), root (RT) and seeds (SD) extracts of Azadirachta indica on mild steel corrosion in H(2)SO(4) solutions was studied using weight loss and gasometric techniques. The results obtained indicate that the extracts functioned as good inhibitors in H(2)SO(4) solutions. Inhibition efficiency was found to increase with extracts concentration and temperature, and followed the trend: SD > RT > LV. A mechanism of chemical adsorption of the phytochemical components of the plant extracts on the surface of the metal is proposed for the inhibition behaviour. The experimental data fit into the Freundlich adsorption isotherm.

• 出版日期2010-7
• 单位西北大学