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<p>In this work, Green graphitic carbon (GGC) was synthesized from selective residual agricultural biomass (RAB) using a combination of physical, chemical, and thermal processes in place of Zinc phosphate (ZnP). The anti-corrosion performance of GGC with epoxy resin (GGC/EP) on carbon steel panels was investigated using potentiodynamic polarisation (PDP), electrochemical impedance spectroscopy (EIS), and salt spray test (SST). The results showed that the GGC/EP coated steel panels were higher (96.89%) in corrosion resistance compared to uncoated panels. The microhardness of GGC/EP coated panels was higher by 34.4% compared to ZnP/EP coated carbon steel panels. SEM, and 3D optical profilometry results showed that the GGC/EP coated panels show uniform Coating, finished surface, and lower surface roughness (7.5%) than the ZnP/EP-coated carbon steel panels. GGC/EP coated panels showed a hydrophobic surface with an improved contact angle of 106.2° compared to ZnP/EP coated carbon steel panels at 78.7°. After 500&#xa0;h of immersion in 5 wt.% NaCl solution, GGC/EP coated panels showed very few signs of pitting corrosion compared to ZnP/EP coated carbon steel panels. The paints and coatings industries have already adopted a material equivalent, derived from this research.</p>

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Preparation of Green Graphitic Carbon Mixed Epoxy Coating for Anticorrosion and Hydrophobic Properties in Carbon Steel for Corrosion Protection in Marine Environment: A Novel Material for Carbon Neutrality and Credit in Paints and Coatings Industry

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Anu Verma,
  • Rupam Bandyopadhyay,
  • Debabrata Pal,
  • Bidus Kanti Das,
  • Tapan Kumar Dhar,
  • Chandra Sekhar Tiwary,
  • Jayanta Bhattacharya

摘要

In this work, Green graphitic carbon (GGC) was synthesized from selective residual agricultural biomass (RAB) using a combination of physical, chemical, and thermal processes in place of Zinc phosphate (ZnP). The anti-corrosion performance of GGC with epoxy resin (GGC/EP) on carbon steel panels was investigated using potentiodynamic polarisation (PDP), electrochemical impedance spectroscopy (EIS), and salt spray test (SST). The results showed that the GGC/EP coated steel panels were higher (96.89%) in corrosion resistance compared to uncoated panels. The microhardness of GGC/EP coated panels was higher by 34.4% compared to ZnP/EP coated carbon steel panels. SEM, and 3D optical profilometry results showed that the GGC/EP coated panels show uniform Coating, finished surface, and lower surface roughness (7.5%) than the ZnP/EP-coated carbon steel panels. GGC/EP coated panels showed a hydrophobic surface with an improved contact angle of 106.2° compared to ZnP/EP coated carbon steel panels at 78.7°. After 500 h of immersion in 5 wt.% NaCl solution, GGC/EP coated panels showed very few signs of pitting corrosion compared to ZnP/EP coated carbon steel panels. The paints and coatings industries have already adopted a material equivalent, derived from this research.