Sonchus Asper Leaves Extract as a Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Medium


Narjes Ibrahem Khaled, Nawras Jameel Jassim and Khitam Zanad Abdul Sada


Department of Chemical and Petrochemical Techniques Engineering Southern Technical University. Basra, Iraq

Department of Chemical Industries, Southern Technical University, Basra, Iraq

Corresponding Author Email: [email protected]

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With the utilizations of the approaches of weight-loss, the inhibitive actions related to the leaves extract of Sonchus Asper on a mild steel corrosion in HCl solution of 1M have been investigated. The results specified that the extract functions as an excellent inhibitor enhancing the effectiveness of inhibition with the extract’s concentration. The increase of the temperature will results in a decrease in the inhibition effectiveness of the extract and that was indicated via temperature studies between (25 and 65) Celsius. At 25 Celsius, inhibition effectiveness of 2g/L (EESA) achieves 94.07%. With regard to inhibition conduct, an approach of chemical adsorption regarding the elements of the extract on the surface of metal was presented. The adsorption properties of inhibitor have been in consistency with isotherm Langmuir adsorption. Furthermore, the activation and dissolution energy thermo-dynamic functions are evaluated and examined.