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<p>This study examines the anti-corrosion efficiency of <i>Datura stramonium </i>L<i>. </i>(<i>DS</i>) and <i>Calotropis procera (CP)</i> plant materials as environmentally benign inhibitors for API (American Petroleum Institute) 5&#xa0;L-X52 carbon steel exposed to 1&#xa0;M HCl solution. Corrosion performance was assessed through weight loss measurements, UV–Visible spectroscopy, and surface analysis using scanning electron microscopy (SEM). The findings demonstrate that both plant materials exhibit pronounced anti-corrosion activity, with inhibition efficiency increasing with inhibitor loading and attaining maximum values of 86.15% for DS and 81.63% for CP at 0.25&#xa0;g·L<sup>−1</sup>. Adsorption behavior of the inhibitor species on the steel surface conforms to the Frumkin adsorption isotherm, reflecting non-ideal adsorption with lateral interactions among adsorbed molecules. The inhibition mechanism is predominantly associated with physisorption, arising from electrostatic interactions between protonated inhibitor constituents and the charged steel surface, which promotes the formation of a protective adsorbed film. Evidence from UV–visible spectra and SEM micrographs confirms the presence and integrity of this surface film, leading to a marked reduction in corrosion damage. Overall, <i>Datura stramonium</i> and <i>Calotropis procera</i> emerge as effective, sustainable anti-corrosion agents for the protection of carbon steel in acidic environments.</p>

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Enhanced Corrosion Inhibition of the Steel Pipes in Acidic Media Using Datura Stramonium L. and Calotropis Procera (Aiton) Extracts

  • 期刊论文

  • 发表日期：

    2026年2月10日

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  • Mohammed Sadou,
  • Hadjer Didouh,
  • Belabed Ahlem,
  • Souaad Elhouari,
  • Mohammed Hadj Meliani,
  • Rami K. Suleiman,
  • Tawfik A. Saleh

摘要

This study examines the anti-corrosion efficiency of Datura stramonium L. (DS) and Calotropis procera (CP) plant materials as environmentally benign inhibitors for API (American Petroleum Institute) 5 L-X52 carbon steel exposed to 1 M HCl solution. Corrosion performance was assessed through weight loss measurements, UV–Visible spectroscopy, and surface analysis using scanning electron microscopy (SEM). The findings demonstrate that both plant materials exhibit pronounced anti-corrosion activity, with inhibition efficiency increasing with inhibitor loading and attaining maximum values of 86.15% for DS and 81.63% for CP at 0.25 g·L−1. Adsorption behavior of the inhibitor species on the steel surface conforms to the Frumkin adsorption isotherm, reflecting non-ideal adsorption with lateral interactions among adsorbed molecules. The inhibition mechanism is predominantly associated with physisorption, arising from electrostatic interactions between protonated inhibitor constituents and the charged steel surface, which promotes the formation of a protective adsorbed film. Evidence from UV–visible spectra and SEM micrographs confirms the presence and integrity of this surface film, leading to a marked reduction in corrosion damage. Overall, Datura stramonium and Calotropis procera emerge as effective, sustainable anti-corrosion agents for the protection of carbon steel in acidic environments.