Electrochemical Study of Corrosion Inhibition of Mild Steel in Hydrochloric Acid Solution by the Extract of Cuscuta Reflexa

Abstract

The extract of Cuscuta reflexa Roxb. (CRRE) evaluated as effective corrosion inhibitor for mild steel in 1 M HCl. The inhibition action of CRRE has been investigated by using polarisation and electrochemical impedance spectroscopy. Electrochemical measurement shows the maximum inhibition efficiency of (91.28%) for optimum concentration of inhibitor at 25⁰C. Polarization studies showed that inhibitors acts as a mixed type inhibitor. Scanning electron microscopy (SEM) studies shows that the inhibitor formed protective film over the mild steel surface. Potentiodynamic polarization, electrochemical impedance, and SEM studies, indicate that CRRE can effectively protect the mild steel from corrosion in 1 M HCl.

Keywords: Adsorption · Corrosion inhibition · Mild steel · CRRE