Preparation of active–passive anticorrosion antistatic epoxy nanocomposite coatings loaded with CeO2, CeO2@C, and CHS particles
New epoxy nanocomposite coatings combine CeO2, CeO2@C and CHS particles to provide corrosion protection and antistatic properties in one. This innovative combination of materials shows great potential for industrial applications where long-lasting protection and conductivity are required.
This study developed active-passive anticorrosion coatings using epoxy resin loaded with CeO2 (cerium oxide), carbon-coated cerium oxide (CeO2@C), and carbon hollow sphere (CHS) particles. The goal was to improve the corrosion resistance and antistatic properties of the coatings. Cerium oxide particles were synthesized via a hydrothermal method to achieve a uniform, semispherical morphology and improve dispersion stability. The CHS particles were fabricated using a surface-modified silica templating method.
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The structure and morphology of the particles were analyzed using various techniques such as FTIR, X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. The results showed that CHS particles migrate toward the coating surface due to their low interfacial tensions, reducing the dielectric constant and electrical resistance. This migration contributes to the enhanced antistatic properties of the composite. The corrosion resistance of the coatings was assessed using electrochemical impedance spectroscopy and immersion tests, showing significant improvements.
Synergistic protective effect of the nanocomposites
The study showed that the combination of CeO2, CeO2@C, and CHS particles significantly enhanced the corrosion protection. After 40 days in a 3.5% NaCl solution, the impedance value of the coating increased substantially, indicating excellent corrosion resistance. These nanocomposite coatings offer both superior corrosion protection and antistatic properties, making them suitable for a wide range of industrial applications.
Source: Journal of Coatings Technology and Research, Volume 21, pages 1263–1279, (2024)
