Non-Electrochemical Study of Mild Steel Corrosion Inhibition in Sulphuric Acid Solution by Using the Cuscuta Reflexa Extract

Abstract

The anticorrosive effect of Cuscuta reflexa Roxb. extract (CRRE) on the mild steel corrosion in 0.5 M H₂SO₄ employing weight loss measurements. Weight loss measurement shows that inhibitor exhibited the best inhibition efficiency of 92.58 at optimum concentration. The inhibition action of inhibitor is discussed in view of blocking the metal electrode surface by mean of adsorption of the indicator molecules following the Langmuir adsorption isotherm. Scanning electron microscopy (SEM) displays that the inhibitor formed protective film over the mild steel surface. Weight loss measurement as well as SEM, indicate that CRRE can efficiently protect the mild steel from corrosion in 0.5 M H₂SO₄.

Keywords: Adsorption · Corrosion inhibition · Mild steel · CRRE