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

Materials

Ahmed A. Al-Amiery¹  Abdul Amir H. Kadhum¹  Abu Bakar Mohamad¹  Ahmed Y. Musa² 

[1] Department of Chemical and Process Engineering, Universiti of Kebangsaan Malaysia (UKM), Bangi, Selangor 43000, Malaysia; E-Mails:;Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario N6A3K7, Canada; E-Mail:

关键词: corrosion inhibition;    chlorocurcumin;    polarization;    potentiodynamic;   

DOI  :  10.3390/ma6125466

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.