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<p>This paper focuses on the increasing need for sustainable and eco-friendly corrosion inhibitors, especially in the gas and oil sectors. It addresses the corrosion problems faced by metals in acidic media, which can cause significant economic and ecological impacts. Essential oil extracts from Ridolfia segetum, a European-Mediterranean plant, have been proposed as potential corrosion inhibitors. Although known for their diverse beneficial properties, the application of these extracts as anti-corrosion agents is did not studied well. Experimental and computational methods were combined to evaluate the corrosion inhibition effectiveness of Ridolfia segetum essential oil extracts for steel in 1 M HCl. Electrochemical studies estimated corrosion rates in the presence and absence of these extracts, while SEM visualized the protective film on the mild steel surface. DFT calculations and molecular dynamics simulations elucidated the interaction between the defender agents and the mild steel surface. Fukui indices and Radial Distribution Function (RDF) analysis were used for local reactivity analysis to corroborate the proposed inhibitive mechanism. At 500 ppm concentration, the i<sub>corr</sub> was reduced to 87.8 µA/cm<sup>2</sup> with the H3 inhibitor and 84.2 µA/cm<sup>2</sup> with the H4 inhibitor, compared to 678.5 µA/cm<sup>2</sup> for the blank solution without inhibitors. This indicates a substantial reduction in the corrosion rate. The inhibition efficiency (η<sub>EIS</sub>) calculated from EIS data was over 87% for both H3 and H4 inhibitors at 500 ppm. Specifically, H3 achieved an inhibition efficiency of 87.1%, while H4 achieved 87.6%. SEM analysis confirmed the establishment of a defensive coating on the metal surface. Both H3 and H4 exhibit predominantly cathodic inhibition behavior, as evidenced by the significant shift in E<sub>corr</sub> values. Theoretical computations and simulations suggested physisorption as the mechanism of interaction between the defender agents and the mild steel surface. Local reactivity and RDF analyses further substantiated this inhibitive mechanism. These results highlight the potential of Ridolfia segetum essential oil extracts as environmental and anti-corrosion agents, particularly for use in the gas and oil industries.</p>

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Eco-Friendly Corrosion Prevention: Exploring the Use of Ridolfia Segetum Essential Oil in Mild Steel Acidic Environments

  • 期刊论文

  • 发表日期：

    2025年2月7日

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  • M. Bouziani Idrissi,
  • Hamza Hailou,
  • Omar Dagdag,
  • Hansang Kim,
  • Avni Berisha,
  • Elyor Berdimurodov,
  • E. H. El Kafsaoui,
  • A. Zarrouk,
  • A. El Midaoui,
  • H. Oudda,
  • Khasan Berdimuradov

摘要

This paper focuses on the increasing need for sustainable and eco-friendly corrosion inhibitors, especially in the gas and oil sectors. It addresses the corrosion problems faced by metals in acidic media, which can cause significant economic and ecological impacts. Essential oil extracts from Ridolfia segetum, a European-Mediterranean plant, have been proposed as potential corrosion inhibitors. Although known for their diverse beneficial properties, the application of these extracts as anti-corrosion agents is did not studied well. Experimental and computational methods were combined to evaluate the corrosion inhibition effectiveness of Ridolfia segetum essential oil extracts for steel in 1 M HCl. Electrochemical studies estimated corrosion rates in the presence and absence of these extracts, while SEM visualized the protective film on the mild steel surface. DFT calculations and molecular dynamics simulations elucidated the interaction between the defender agents and the mild steel surface. Fukui indices and Radial Distribution Function (RDF) analysis were used for local reactivity analysis to corroborate the proposed inhibitive mechanism. At 500 ppm concentration, the icorr was reduced to 87.8 µA/cm2 with the H3 inhibitor and 84.2 µA/cm2 with the H4 inhibitor, compared to 678.5 µA/cm2 for the blank solution without inhibitors. This indicates a substantial reduction in the corrosion rate. The inhibition efficiency (ηEIS) calculated from EIS data was over 87% for both H3 and H4 inhibitors at 500 ppm. Specifically, H3 achieved an inhibition efficiency of 87.1%, while H4 achieved 87.6%. SEM analysis confirmed the establishment of a defensive coating on the metal surface. Both H3 and H4 exhibit predominantly cathodic inhibition behavior, as evidenced by the significant shift in Ecorr values. Theoretical computations and simulations suggested physisorption as the mechanism of interaction between the defender agents and the mild steel surface. Local reactivity and RDF analyses further substantiated this inhibitive mechanism. These results highlight the potential of Ridolfia segetum essential oil extracts as environmental and anti-corrosion agents, particularly for use in the gas and oil industries.