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Abstract

MILD STEEL CORROSION INHIBITION BY AQUEOUS LEAVES EXTRACT OF SCOPARIA DULCIS IN ACID MEDIUM

B. Arifa Farzana* and K. Riaz Ahamed

ABSTRACT

The inhibitive effect of Scoparia dulcis leaves extract on the corrosion
of mild steel in acid medium was investigated using potentiodynamic
polarization and electrochemical impedance spectroscopy (EIS)
techniques. The stability of the inhibition efficiency of Scoparia dulcis
extract was examined by weight-loss method. The corrosion rates of
steel and the inhibition efficiencies of the extract obtained from
impedance and polarization measurements were in good agreement.
Inhibition was found to increase with an increasing concentration of
the plant extract. The results obtained show that the Scoparia dulcis
could serve as an effective inhibitor for the corrosion of mild steel in
acid medium.

Keywords: Mild steel, Corrosion inhibition, Scoparia dulcis extract, HCl, potentiodynamic polarization, EIS.


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