Abstract

This work aims to explore how the cationic UV-curing technology can be applied for corrosion protection of metals. For this purpose, the cationic UV-curing epoxy coating is prepared on the steel surface, with addition of the inhibitor-loaded nanoparticles. To reveal the effect of Ce-loaded SiO₂ nanoparticles on the photoinitiated cationic polymerization of epoxy coating, various measurements have been carried out during the UV irradiation, such as the consumption of photoinitiator (triarylsulfonium hexafluoroantimonate salts, TAS), conversion of epoxy groups, gel fraction, swelling degree and relative hardness of coating samples. To evaluate the effect of Ce-loaded SiO₂ nanoparticles on mechanical and anticorrosion properties of UV-cured epoxy coating, the impact strength, abrasion resistance, electrochemical impedance spectroscopy and salt spray tests have been carried out and analyzed. The experimental data indicate that the incorporation of Ce-loaded SiO₂ nanoparticles into epoxy matrix reduces both the relative hardness, gel fraction and the conversion of TAS photoinitiator and epoxy groups. However, the presence of these nanoparticles increases both impact strength, abrasion resistance and anticorrosion performance of the cationic UV-cured epoxy coating.

中文翻译：

---

带有负载抑制剂的纳米颗粒的阳离子紫外固化环氧涂料：光引发阳离子聚合、钢的机械性能和腐蚀防护

摘要

本工作旨在探讨如何将阳离子紫外固化技术应用于金属的腐蚀防护。为此，在钢表面制备阳离子紫外固化环氧涂层，并添加负载抑制剂的纳米颗粒。为了揭示Ce负载SiO ₂纳米粒子对环氧涂层光引发阳离子聚合的影响，在紫外照射过程中进行了各种测量，例如光引发剂（三芳基锍六氟锑酸盐，TAS）的消耗量、环氧基团的转化率、涂层样品的凝胶分数、溶胀度和相对硬度。为了评价Ce负载SiO ₂纳米颗粒对紫外光固化环氧涂层机械性能和防腐性能的影响，进行了冲击强度、耐磨性、电化学阻抗谱和盐雾试验并进行了分析。实验数据表明，将负载Ce的SiO ₂纳米粒子掺入环氧树脂基体中，降低了相对硬度、凝胶分数以及TAS光引发剂和环氧基团的转化率。然而，这些纳米颗粒的存在提高了阳离子紫外线固化环氧涂层的冲击强度、耐磨性和防腐性能。