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<p>The development of novel, highly efficient, ecological inhibitors against corrosion in acidic environments is of paramount importance in the oil industry because the oil producing companies industry strongly rely on acidic treatments for infrastructure maintenance and cleaning operations. This study employed grape stalk extract-mediated silver nanoparticles (GS/AgNps), synthesized using aqueous extract of grape stalks (AEGS), as a green inhibitor of corrosion in 304 stainless steel (304SS). The GS/AgNps were characterized using UV–visible spectroscopy (UV–Vis), Fourier–transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), and dynamic light scattering (DLS). The GS/AgNps obtained exhibited a crystalline structure with spherical morphology, with an average diameter of 24.59&#xa0;nm and a surface plasmon resonance centered at 412&#xa0;nm. Through the application of SEM, weight loss, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), and energy-dispersive X-ray spectroscopy (EDS) analyses, the corrosion inhibition potential of GS/AgNps and AEGS was evaluated in 304SS using 0.5&#xa0;M HCl as the supporting electrolyte at room temperature and at elevated temperatures. The proposed GS/AgNps recorded a higher maximum surface coverage (θ) of 97.91 ± 0.38% and an inhibition efficiency (η) of 70.48 ± 0.02% compared to AEGS, which exhibited θ and η values of 84.26 ± 2.69% and 37.57 ± 0.23%, respectively. These results show that GS/AgNps can act as an effective green corrosion protector for 304SS under acidic conditions, contributing to the development of sustainable alternative inhibitors for metallic protection.</p> Graphical Abstract <p></p>

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Green-Synthesized Silver Nanoparticles as Efficient Corrosion Inhibitors for 304 Stainless Steel in Acidic Media

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • Rosa M. De La Cruz-Puma,
  • Javier E. L. Villa,
  • J. L. da Silva,
  • Jaime Vega-Chacón,
  • Adolfo La Rosa-Toro

摘要

The development of novel, highly efficient, ecological inhibitors against corrosion in acidic environments is of paramount importance in the oil industry because the oil producing companies industry strongly rely on acidic treatments for infrastructure maintenance and cleaning operations. This study employed grape stalk extract-mediated silver nanoparticles (GS/AgNps), synthesized using aqueous extract of grape stalks (AEGS), as a green inhibitor of corrosion in 304 stainless steel (304SS). The GS/AgNps were characterized using UV–visible spectroscopy (UV–Vis), Fourier–transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), and dynamic light scattering (DLS). The GS/AgNps obtained exhibited a crystalline structure with spherical morphology, with an average diameter of 24.59 nm and a surface plasmon resonance centered at 412 nm. Through the application of SEM, weight loss, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), and energy-dispersive X-ray spectroscopy (EDS) analyses, the corrosion inhibition potential of GS/AgNps and AEGS was evaluated in 304SS using 0.5 M HCl as the supporting electrolyte at room temperature and at elevated temperatures. The proposed GS/AgNps recorded a higher maximum surface coverage (θ) of 97.91 ± 0.38% and an inhibition efficiency (η) of 70.48 ± 0.02% compared to AEGS, which exhibited θ and η values of 84.26 ± 2.69% and 37.57 ± 0.23%, respectively. These results show that GS/AgNps can act as an effective green corrosion protector for 304SS under acidic conditions, contributing to the development of sustainable alternative inhibitors for metallic protection.

Graphical Abstract