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

Overview
Journal Materials (Basel)
Publisher MDPI
Date 2017 Aug 10
PMID 28788402
Citations 6
Authors
Ahmed A Al-Amiery
Abdul Amir H Kadhum
Abu Bakar Mohamad
Ahmed Y Musa
Cheong Jiun Li
Affiliations
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Abstract

A new curcumin derivative, , (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 C-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.

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