Applied Chemical Engineering

Evaluation of Methanolic Extract of Inula graveolens L. as Antioxidant and Corrosion Inhibitor for Carbon Steel Alloy using MATLAB

Khawlah S. Burgha

Department of Chemistry, College of Science, University of Basrah, 61004 Basrah, Iraq

Hind Abdel Amier Sabti

Department of Chemistry, College of Science, University of Basrah, 61004 Basrah, Iraq

Adnan Jassim Mohammed Al-Fartosy

Department of Chemistry, College of Science, University of Basrah, 61004 Basrah, Iraq

DOI: https://doi.org/10.59429/ace.v9i2.5863

Keywords: Inula graveolens L., antioxidants, corrosion inhibitors, acidic corrosive media, carbon steel alloy

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Abstract

In recent years, Antioxidants have played a crucial role in various applications, and their potential has been evaluated through multiple assays Antioxidant utilizing 2, 2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH), β-carotene assay and environmentally friendly corrosion resistance property for alloy carbon steel in 1M HCl was investigated in both in the absence and presence of methanolic extract of Inula graveolens L (MEIG). Using the Tafel Plot method, the impact of temperature and inhibitor concentration was studied MEIG gave good antioxidant activity, including β-carotene (83%) and DPPH (73.9%), and exhibited a maximal (99.5%) inhibitory efficiency at 323 k. Kinetic parameters (Ea, ΔG*, ΔS*and ΔH*,) were calculated. MEIG increased the energy barrier of the corrosion reaction, making it non-spontaneous through an endothermic mechanism. Furthermore, ΔHads, ΔGads, and ΔSads were also calculated, demonstrating that the inhibitor was physically adsorbed via a spontaneous. However, inhibition efficiency decreased with rising temperature due to weakened adsorption and desorption effect Simply blocking the reaction sites inhibited the corrosion. The absorption process sold the Langmuir equation for heat absorption. The study highlights MEIG’s dual functionality as a potent antioxidant and an effective, environmentally friendly corrosion inhibitor models was processed using MATLAB computer programming.

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