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<p>Graphene has emerged as a promising material for corrosion-resistant coatings because of its exceptional barrier performance and chemical resistance effective barrier protection against corrosive species. The present study involved the deposition of graphene nanosheets, which researchers synthesized through nitric acid-assisted electrochemical exfoliation onto copper substrates using electrophoretic deposition (EPD) method. The researchers conducted a detailed study of how post-deposition heat treatment and surfactant-assisted dispersion techniques affected coating performance. The heat treatment process that treated graphene coatings at 130&#xa0;°C for 1&#xa0;h resulted in better adhesion and lower corrosion rates when compared to untreated coatings. The researchers used surfactant-modified dispersions of methyl violet (MV) and sodium dodecyl sulfate (SDS) to improve graphene stability and achieve uniform coating distribution. The researchers used potentio-dynamic polarization tests to assess corrosion behavior in a 3.5 wt% NaCl solution. The results show that heat-treated graphene coatings and SDS-modified dispersions showed better corrosion resistance because their corrosion rates decreased by about 20 to 25 percent compared to unmodified graphene coatings. The coatings that used MV-assisted dispersions provided erratic corrosion protection because their deposition process created non-uniform patterns, which caused delamination issues. The study results show that researchers can improve the protective capabilities of graphene coatings on metallic surfaces by optimizing both the dispersion chemistry and the post-treatment processes.</p>

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Exploration of Corrosion Resistive Electrodeposited Graphene Coatings Enhanced Through Heat Treatment and Surfactant Incorporation

  • 期刊论文

  • 发表日期：

    2026年7月16日

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  • Amlan Das,
  • Archana Mallik

摘要

Graphene has emerged as a promising material for corrosion-resistant coatings because of its exceptional barrier performance and chemical resistance effective barrier protection against corrosive species. The present study involved the deposition of graphene nanosheets, which researchers synthesized through nitric acid-assisted electrochemical exfoliation onto copper substrates using electrophoretic deposition (EPD) method. The researchers conducted a detailed study of how post-deposition heat treatment and surfactant-assisted dispersion techniques affected coating performance. The heat treatment process that treated graphene coatings at 130 °C for 1 h resulted in better adhesion and lower corrosion rates when compared to untreated coatings. The researchers used surfactant-modified dispersions of methyl violet (MV) and sodium dodecyl sulfate (SDS) to improve graphene stability and achieve uniform coating distribution. The researchers used potentio-dynamic polarization tests to assess corrosion behavior in a 3.5 wt% NaCl solution. The results show that heat-treated graphene coatings and SDS-modified dispersions showed better corrosion resistance because their corrosion rates decreased by about 20 to 25 percent compared to unmodified graphene coatings. The coatings that used MV-assisted dispersions provided erratic corrosion protection because their deposition process created non-uniform patterns, which caused delamination issues. The study results show that researchers can improve the protective capabilities of graphene coatings on metallic surfaces by optimizing both the dispersion chemistry and the post-treatment processes.