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<p>Hydrodynamic seawater corrosion poses a significant challenge to the durability of basalt fiber-reinforced polymer composites in marine engineering. This study investigates the mechanical degradation mechanisms of basalt fibers and basalt fiber-reinforced polymer composites under seawater flow (0–1800 rpm) over 20 weeks. Morphological transitions in corrosion products were observed, evolving from elongated (0 rpm) to block-like (600–1200 rpm) and finally to flake-like structures (1800 rpm). The tensile strength of basalt fibers decreased by 22.39% after 20 weeks at 1800 rpm. For basalt fiber-reinforced polymer composites, the flexural strength decreased by 16.19% after 10 weeks at 1800 rpm, while the interlaminar shear strength (ILSS) declined by 8.51% after 8 weeks at the same speed, both reaching saturation. Hydrodynamic shear accelerated interfacial debonding and facilitated ion penetration. The results indicate that rotational speeds exceeding 600 rpm dominate the degradation process, providing a basis for rational application of basalt fiber-reinforced polymer composites in high-flow marine environments.</p>

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Effect of Hydrodynamic Seawater Corrosion on the Mechanical Properties of Basalt Fibers and Basalt Fiber/Epoxy Composites

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Yingquan Zhou,
  • Dong Xiang,
  • Libing Liu,
  • Peiyong Wang,
  • Yafeng Ju,
  • Kunming Ye,
  • Yuanpeng Wu

摘要

Hydrodynamic seawater corrosion poses a significant challenge to the durability of basalt fiber-reinforced polymer composites in marine engineering. This study investigates the mechanical degradation mechanisms of basalt fibers and basalt fiber-reinforced polymer composites under seawater flow (0–1800 rpm) over 20 weeks. Morphological transitions in corrosion products were observed, evolving from elongated (0 rpm) to block-like (600–1200 rpm) and finally to flake-like structures (1800 rpm). The tensile strength of basalt fibers decreased by 22.39% after 20 weeks at 1800 rpm. For basalt fiber-reinforced polymer composites, the flexural strength decreased by 16.19% after 10 weeks at 1800 rpm, while the interlaminar shear strength (ILSS) declined by 8.51% after 8 weeks at the same speed, both reaching saturation. Hydrodynamic shear accelerated interfacial debonding and facilitated ion penetration. The results indicate that rotational speeds exceeding 600 rpm dominate the degradation process, providing a basis for rational application of basalt fiber-reinforced polymer composites in high-flow marine environments.