Experimental and theoretical investigations on the use of Corchorus olitorius stem extract as a safe corrosion inhibitor for carbon steel in hydrochloric acid

Gadow, Hend; Albalawi, Marzough Aziz

doi:10.21608/ejchem.2024.249091.8882

Experimental and theoretical investigations on the use of Corchorus olitorius stem extract as a safe corrosion inhibitor for carbon steel in hydrochloric acid

Document Type : Original Article

Authors

Hend Gadow ¹
Marzough Aziz Albalawi ²

¹ Egypt Mohamed ali

² University of Tabuk, Alwajh college, Chemistry department, Alwajh.

10.21608/ejchem.2024.249091.8882

Abstract

The adsorption activity and inhibitory effect of Corchorus olitorius stem extract (ECS) were investigated as a safe inhibitor for the dissolution of carbon steel in 1 M hydrochloric acid solution. In this study, different electrochemical techniques as electrical frequency modulation, potentiodynamic polarization, electrochemical impedance spectroscopy, a chemical method (gravimetric method), and theoretical investigation, were all applied. Along with these approaches, we used a variety of other strategies to look at the surface morphology of carbon steels(AFM,XPS, and FTIR). This extract is a mixed-type inhibitor, according to the results of the polarization technique measurements. Parameters related to thermodynamics were calculated and discussed. The adsorption of Corchorus olitorius obeys the Langmuir and Temkin adsorption isotherms stems extract on the alloy. Using a gravimetric technique, the extract provides a fantastic inhibitory efficiency of 95.53% at 300 ppm from Corchorus olitorius stems. The computed I.E% from experiments and the theoretical studies were found to be related. The location of sterols and fatty acids has long been determined using the molecular electrostatic potential (MESP).

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