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<p>This study focuses on synthesizing an imide-based covalent organic framework (COF) and incorporating 8-hydroxyquinoline (8HQ), a corrosion inhibitor, into the COF structure to enhance corrosion protection in epoxy coatings. The COF was synthesized via the self-assembly of melamine and pyromellitic dianhydride, and 8HQ was successfully encapsulated within its pores. Characterization techniques such as XRD, FTIR, BET, and FE-SEM confirmed the formation of the COF and the loading of 8HQ. The COF was then incorporated into an epoxy resin, improving the coating’s corrosion resistance, adhesion, tensile strength, and hydrophobicity. Additionally, the long-term performance of the coating was enhanced by the presence of the encapsulated inhibitor. Moreover, the encapsulated inhibitor demonstrated excellent long-term corrosion protection when tested alone or in combination with 3-glycidoxypropyltrimethoxysilane (GPTMS). The superior performance of the Si-8HQ@COF/EP coating can be attributed to the COF’s barrier properties, hydrophobicity, and self-healing abilities. This work demonstrates the potential of COF-based nanocomposites to provide durable and adequate corrosion protection for industrial applications, offering a promising strategy for advanced coating materials with enhanced mechanical and anti-corrosion properties.</p>

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Improving corrosion resistance of epoxy coatings with 8-hydroxyquinoline loaded imide COF and 3-glycidoxypropyltrimethoxysilane

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Shohreh Baniasad,
  • Mehran Hayaty,
  • Mahdi Shafiei

摘要

This study focuses on synthesizing an imide-based covalent organic framework (COF) and incorporating 8-hydroxyquinoline (8HQ), a corrosion inhibitor, into the COF structure to enhance corrosion protection in epoxy coatings. The COF was synthesized via the self-assembly of melamine and pyromellitic dianhydride, and 8HQ was successfully encapsulated within its pores. Characterization techniques such as XRD, FTIR, BET, and FE-SEM confirmed the formation of the COF and the loading of 8HQ. The COF was then incorporated into an epoxy resin, improving the coating’s corrosion resistance, adhesion, tensile strength, and hydrophobicity. Additionally, the long-term performance of the coating was enhanced by the presence of the encapsulated inhibitor. Moreover, the encapsulated inhibitor demonstrated excellent long-term corrosion protection when tested alone or in combination with 3-glycidoxypropyltrimethoxysilane (GPTMS). The superior performance of the Si-8HQ@COF/EP coating can be attributed to the COF’s barrier properties, hydrophobicity, and self-healing abilities. This work demonstrates the potential of COF-based nanocomposites to provide durable and adequate corrosion protection for industrial applications, offering a promising strategy for advanced coating materials with enhanced mechanical and anti-corrosion properties.