Clean Technology 2009

Use of different natural Extracts from Tropical plants as Green Inhibitors for Metals

W. Bogaerts, T. Vuthi, L.Q. Hung, N.N. Phong, R. Addul
University of Leuven, BE

Keywords: Inhibitors, Tropical plants extracts, corrosion, metal


The authors present an overview of the work & results obtained in the framework of a bilateral cooperation program between Belgium and Vietnam to discover new environmentally-friendly corrosion inhibitors or ‘harmless corrosion inhibitors to nature” based on components from naturally-occurring tropical plants. A few hundreds of tests/experiments of a dozen selected tropical plant-extracts as corrosion inhibitors have been performed employing electrochemical impedance spectroscopy (EIS), potentiostatic and potentiodynamic polarization techniques. The efficiency of these extracts, i.e. slow down or reduce corrosion of a metal/alloy when added to a given environment with different concentrations is illustrated.
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