Journal
CORROSION SCIENCE
Volume 65, Issue -, Pages 152-162Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2012.08.012
Keywords
Mild steel; EIS; Polarization; Acid inhibition; Interfaces
Funding
- Universiti Sains Malaysia through the RU-USM-Postgraduate Research Grant Scheme [1001/PKIMIA/833026]
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This article describes studies on the modification of mangrove tannin (MT) and catechin (CT) to enhance their corrosion inhibition properties. The inhibitive effect of the starting materials and the chemically modified products on the corrosion of mild steel in 1 M HCl solution was studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). We demonstrated that the chemical modification has successfully enhanced the inhibition efficiency of CT; however reduced that of MT. The disparity in the corrosion inhibitory performances of the modified products was attributed to the inertness of CT towards a complete methylation as compared to MT. (C) 2012 Elsevier Ltd. All rights reserved.
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