Organic-inorganic composite coatings of PU-SMP@ZrO2 with enhancing corrosion/wear resistances

Zun-shuo Li, Zhong-shan Wang, Ming-ming Liu, Yong-ling Wu, Hong-yu Zheng

钢铁研究学报(英文版) ›› 2025, Vol. 32 ›› Issue (5) : 1212-1225.

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钢铁研究学报(英文版) ›› 2025, Vol. 32 ›› Issue (5) : 1212-1225.
ORIGINAL PAPERS

Organic-inorganic composite coatings of PU-SMP@ZrO2 with enhancing corrosion/wear resistances

  • Zun-shuo Li1, Zhong-shan Wang1, Ming-ming Liu1, Yong-ling Wu1, Hong-yu Zheng1
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Organic-inorganic composite coatings of PU-SMP@ZrO2 with enhancing corrosion/wear resistances

  • Zun-shuo Li1, Zhong-shan Wang1, Ming-ming Liu1, Yong-ling Wu1, Hong-yu Zheng1
Author information +
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Abstract

Metal wear and corrosion require a protective coating with good corrosion and wear resistance. The inorganic adhesive of methyltriethoxysilane modified silica sol (SMP) was first synthesized by the dehydration condensation of silica sol (S30) with methyltriethoxysilane in propyl alcohol. Then, SMP was used to modify the organic polyurethane (PU) by adjusting the volume ratio. The optimal ratio of the organic-inorganic hybrid adhesive PU-SMP was obtained by measuring its film-forming, mechanical, and corrosion-resistant properties. Then, PU-SMP and zirconia nanoparticles (ZrO2) were used as an adhesive and functional filler to prepare the organic-inorganic composite coating of PU-SMP@ZrO2 via spraying on various substrates. The fabricated PU-SMP@ZrO2 performed superior mechanical strength, good wear performance, and excellent anti-corrosion property. The pencil hardness of the coating PU-SMP@2.5ZrO2 is 7H, the wear mass is reduced from 0.7 to 0.2 mg, and the impedance modulus reached 10; 7 Ω cm2. The synthesized organic-inorganic hybrid adhesive and its composite coatings provide a promising approach for constructing functional protective coatings on mechanical engineering material.

Key words

Metal protection / Composite resin coating / Anticorrosion / Wear resistance / Nano filler

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Zun-shuo Li, Zhong-shan Wang, Ming-ming Liu, . Organic-inorganic composite coatings of PU-SMP@ZrO2 with enhancing corrosion/wear resistances[J]. 钢铁研究学报(英文版), 2025, 32(5): 1212-1225
Zun-shuo Li, Zhong-shan Wang, Ming-ming Liu, et al. Organic-inorganic composite coatings of PU-SMP@ZrO2 with enhancing corrosion/wear resistances[J]. Journal of Iron and Steel Research International, 2025, 32(5): 1212-1225

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