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<p>This study investigates the potential of <i>Rosa Damascena</i> extract (RDE) as an eco-friendly corrosion inhibitor for carbon steel in hydrochloric acid environments. A comprehensive evaluation was performed using both experimental and theoretical approaches, including potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and quantum chemical calculations. FTIR analysis confirmed the presence of functional groups essential for effective adsorption onto the steel surface, which facilitates the formation of a protective barrier. Potentiodynamic polarization experiments showed an inhibition efficiency of 94.8%, while EIS measurements demonstrated increased impedance, indicating the formation of a robust protective film that impedes corrosive species. Temperature-dependent studies revealed a decline in inhibition efficiency with increasing temperature, suggesting the desorption of active molecules at higher temperatures. The adsorption behavior was found to follow the Langmuir isotherm model, indicating monolayer adsorption with uniform energy distribution. SEM imaging further substantiated the protective effects, showing smoother surfaces and reduced pitting in treated samples. UV–Vis spectroscopy identified key active compounds likely involved in the corrosion inhibition mechanism through electronic interactions with the steel surface. Density Functional Theory (DFT) calculations and molecular dynamics simulations provided insight into the molecular-level interactions, revealing electron donation from RDE to the metal surface, forming a stable, corrosion-resistant layer. The findings demonstrate that <i>Rosa Damascena</i> extract is a promising, sustainable inhibitor for mitigating carbon steel corrosion in acidic environments, providing an effective green alternative to conventional inhibitors.</p>

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Rosa Damascena Extract as a Green Corrosion Inhibitor for Carbon Steel in Acidic Solutions: Experimental Findings and Computational Insights

  • 期刊论文

  • 发表日期：

    2025年11月9日

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  • Rachid Kellal,
  • Qihui Wang,
  • Zaki S. Safi,
  • Nuha A. Wazzan,
  • Xing Zhou,
  • Mustapha Zertoubi,
  • Driss Benmessaoud Left

摘要

This study investigates the potential of Rosa Damascena extract (RDE) as an eco-friendly corrosion inhibitor for carbon steel in hydrochloric acid environments. A comprehensive evaluation was performed using both experimental and theoretical approaches, including potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and quantum chemical calculations. FTIR analysis confirmed the presence of functional groups essential for effective adsorption onto the steel surface, which facilitates the formation of a protective barrier. Potentiodynamic polarization experiments showed an inhibition efficiency of 94.8%, while EIS measurements demonstrated increased impedance, indicating the formation of a robust protective film that impedes corrosive species. Temperature-dependent studies revealed a decline in inhibition efficiency with increasing temperature, suggesting the desorption of active molecules at higher temperatures. The adsorption behavior was found to follow the Langmuir isotherm model, indicating monolayer adsorption with uniform energy distribution. SEM imaging further substantiated the protective effects, showing smoother surfaces and reduced pitting in treated samples. UV–Vis spectroscopy identified key active compounds likely involved in the corrosion inhibition mechanism through electronic interactions with the steel surface. Density Functional Theory (DFT) calculations and molecular dynamics simulations provided insight into the molecular-level interactions, revealing electron donation from RDE to the metal surface, forming a stable, corrosion-resistant layer. The findings demonstrate that Rosa Damascena extract is a promising, sustainable inhibitor for mitigating carbon steel corrosion in acidic environments, providing an effective green alternative to conventional inhibitors.