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Materials 2013, 6(12), 5466-5477; doi:10.3390/ma6125466

Electrochemical Study on Newly Synthesized Chlorocurcumin as an Inhibitor for Mild Steel Corrosion in Hydrochloric Acid

1,2,* , 1
1 Department of Chemical and Process Engineering, Universiti of Kebangsaan Malaysia (UKM), Bangi, Selangor 43000, Malaysia 2 Environmental Research Center, University of Technology (UOT), Baghdad 10001, Iraq 3 Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario N6A3K7, Canada
* Author to whom correspondence should be addressed.
Received: 2 August 2013 / Revised: 17 October 2013 / Accepted: 8 November 2013 / Published: 27 November 2013
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A new curcumin derivative, i.e., (1E,4Z,6E)-5-chloro-1,7-bis(4-hydroxy-3-methoxyphenyl)hepta-1,4,6-trien-3-one (chlorocurcumin), was prepared starting with the natural compound curcumin. The newly synthesized compound was characterized by elemental analysis and spectral studies (IR, 1H-NMR and 13C-NMR). The corrosion inhibition of mild steel in 1 M HCl by chlorocurcumin has been studied using potentiodynamic polarization (PDP) measurements and electrochemical impedance spectroscopy (EIS). The inhibition efficiency increases with the concentration of the inhibitor but decreases with increases in temperature. The potentiodynamic polarization reveals that chlorocurcumin is a mixed-type inhibitor. The kinetic parameters for mild steel corrosion were determined and discussed.
Keywords: corrosion inhibition; chlorocurcumin; polarization; potentiodynamic corrosion inhibition; chlorocurcumin; polarization; potentiodynamic
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Al-Amiery, A.A.; Kadhum, A.A.H.; Mohamad, A.B.; Musa, A.Y.; Li, C.J. Electrochemical Study on Newly Synthesized Chlorocurcumin as an Inhibitor for Mild Steel Corrosion in Hydrochloric Acid. Materials 2013, 6, 5466-5477.

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