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E-Journal of Chemistry
Volume 8 (2011), Issue 1, Pages 326-332

Inhibition of Copper Corrosion by Flavonoids in Nitric Acid

Mahmoud A. Al-Qudah

Department of Chemistry, Faculty of Science, Yarmouk University, Irbid 21163, Jordan

Received 4 May 2010; Accepted 18 July 2010

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A study has been made to investigate the effect of some substituted flavonoids on copper dissolution in 2.0 M HNO3 for 4.0 hours at different temperatures by the weight loss method. Percentage of inhibition increases as concentration of the flavonoids increases and reaches a maximum value, due to the formation of a monolayer film on the surface of the metal. 92% Inhibition was observed in some of these flavonoids. As temperature increases, percentage of inhibition decreases. Energy of activations were deduced and discussed.