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<p>Developing coatings with improved resistance to corrosion and wear for use in extreme environments is critical for advancing the marine engineering sector. In this study, graphene oxide (GO) was modified with tea polyphenols (TP) and further combined with nano-ZnO to fabricate a tea polyphenol-modified graphene oxide/zinc oxide (TP-GO@ZnO) composite material. The composite material was incorporated into the polyester resin (PR) coating at a ratio of 0.1–2.0wt% to prepare a high-performance composite coating (TGZ/P). The dispersion of fillers is an important factor affecting the performance of coatings. Scanning electron microscopy (SEM) analysis indicated that TP-GO@ZnO did not exhibit agglomeration in the PR coating and had good dispersibility. Due to the synergistic effect of the TP-GO@ZnO component, after soaking in NaCl solution for 168&#xa0;h, the low-frequency impedance modulus of the TGZ/P-2.0 coating was 3.29 × 10<sup>8</sup> Ω·cm<sup>2</sup>, which was approximately two orders of magnitude higher than that of the PR coating, which was 2.61 × 10<sup>6</sup> Ω·cm<sup>2</sup>. Additionally, in salt spray tests, the surface corrosion of the TGZ/P-2.0 coating was significantly reduced. Furthermore, the wear rate of the TGZ/P-2.0 coating decreased markedly from 3.08 × 10<sup>6</sup> to 2.13 × 10<sup>5</sup> μm<sup>3</sup>/Nm. These findings demonstrate that the composite coating substantially enhances corrosion and wear resistance.</p> Graphical abstract <p></p>

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Synergy between tea polyphenol-modified graphene oxide and zinc oxide to enhance wear and corrosion resistance of polyester coatings

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Yan Liu,
  • Meibing Liu,
  • Jun Liu,
  • Guoxin Ding,
  • Yuexiang Hu,
  • Li Yang,
  • Yifang Qian,
  • Jiaheng Pu,
  • Guojun Cheng

摘要

Developing coatings with improved resistance to corrosion and wear for use in extreme environments is critical for advancing the marine engineering sector. In this study, graphene oxide (GO) was modified with tea polyphenols (TP) and further combined with nano-ZnO to fabricate a tea polyphenol-modified graphene oxide/zinc oxide (TP-GO@ZnO) composite material. The composite material was incorporated into the polyester resin (PR) coating at a ratio of 0.1–2.0wt% to prepare a high-performance composite coating (TGZ/P). The dispersion of fillers is an important factor affecting the performance of coatings. Scanning electron microscopy (SEM) analysis indicated that TP-GO@ZnO did not exhibit agglomeration in the PR coating and had good dispersibility. Due to the synergistic effect of the TP-GO@ZnO component, after soaking in NaCl solution for 168 h, the low-frequency impedance modulus of the TGZ/P-2.0 coating was 3.29 × 108 Ω·cm2, which was approximately two orders of magnitude higher than that of the PR coating, which was 2.61 × 106 Ω·cm2. Additionally, in salt spray tests, the surface corrosion of the TGZ/P-2.0 coating was significantly reduced. Furthermore, the wear rate of the TGZ/P-2.0 coating decreased markedly from 3.08 × 106 to 2.13 × 105 μm3/Nm. These findings demonstrate that the composite coating substantially enhances corrosion and wear resistance.

Graphical abstract