Corrosion inhibition effect of tea byproduct water extract on mild steel in h2so4 and application

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Author: 
Vu Minh Tan, Luc Van Thu and Le Xuan Que
Abstract: 

Water extract of green tea byproducts was examined as a corrosion inhibitor for mild steel in H2SO4 acid solution using the open circuit potential (Eoc) measurement, the polarization technique and electrochemical impedance spectroscopy. The Eoc measurement and polarization studies showed a strong corrosion inhibition of the extract. Eoc and the inhibition efficiency (H) were found to increase with increasing the extract quantity in the acid solution. The corrosion inhibition of the extract affected both anodic and cathodic reactions. The mechanism of inhibition is an adsorption forming different barriers on the metal surface in both anodic and cathodic branches. The results showed that the extract could play significant role as a corrosion inhibitor for mild steel in H2SO4 environment, and that contributed forward an application for preparation of an industrial pickling solution.

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