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<p>The epoxy/CeO<sub>2</sub> nanocomposite was synthesised, where the nanoceria (CeO<sub>2</sub>) were prepared via the hydrothermal method and the dopant with an average grain size of 18.1&#xa0;nm was incorporated in the epoxy matrix. The corrosion inhibition of stainless steel rods in 1&#xa0;M CH<sub>3</sub>COOH and 0.5&#xa0;M H<sub>2</sub>SO<sub>4</sub> by EP/CeO<sub>2</sub> nanocomposite coverage has been investigated by Tafel polarisation technique and electrochemical impedance spectroscopy (EIS) at the corrosion potential. The study has been carried out at 298&#xa0;K, where nano-CeO<sub>2</sub> acts as an excellent corrosion inhibitor. The obtained data were analysed and modelled to the appropriate Randles circuit. The sequel of UV–visible radiation on the EP/CeO<sub>2</sub> nanocomposite was interrogated through UV–visible spectroscopy. The highest absorption peak appeared around 402&#xa0;nm for the sample with a larger inclusion of nanoceria. The dielectric properties of EP/CeO<sub>2</sub> nanocomposite were studied for different frequencies, and its dielectric permittivity and dielectric constant decreased with an increase in frequency. The FESEM graph details the homogeneous dispersion, the particle size distribution of nanoceria in the matrix, and its possibility of agglomeration for some concentrations.</p>

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Enhancing anti-corrosion performance of epoxy coatings through CeO2-induced structural, optical and electrochemical modifications

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Veena Rose Mathew,
  • Majo Joseph,
  • G. Aryadevi,
  • Geethu Joseph,
  • K. Niveditha,
  • R. Santhosh Kumar,
  • Ginson P. Joseph

摘要

The epoxy/CeO2 nanocomposite was synthesised, where the nanoceria (CeO2) were prepared via the hydrothermal method and the dopant with an average grain size of 18.1 nm was incorporated in the epoxy matrix. The corrosion inhibition of stainless steel rods in 1 M CH3COOH and 0.5 M H2SO4 by EP/CeO2 nanocomposite coverage has been investigated by Tafel polarisation technique and electrochemical impedance spectroscopy (EIS) at the corrosion potential. The study has been carried out at 298 K, where nano-CeO2 acts as an excellent corrosion inhibitor. The obtained data were analysed and modelled to the appropriate Randles circuit. The sequel of UV–visible radiation on the EP/CeO2 nanocomposite was interrogated through UV–visible spectroscopy. The highest absorption peak appeared around 402 nm for the sample with a larger inclusion of nanoceria. The dielectric properties of EP/CeO2 nanocomposite were studied for different frequencies, and its dielectric permittivity and dielectric constant decreased with an increase in frequency. The FESEM graph details the homogeneous dispersion, the particle size distribution of nanoceria in the matrix, and its possibility of agglomeration for some concentrations.