Newly synthesized functional nanoparticles, 3-amino-1,2,4-triazole (ATA)/SiO₂—TiO₂ were introduced to the polyurethane (PU) matrix. Electrochemical techniques were used to investigate the barrier properties of the synthesized PU—ATA/SiO₂—TiO₂ nanocomposite coated steel specimen. In natural seawater, electrochemical impedance spectroscopy experiments indicated outstanding protective behaviour for the PU—ATA/SiO₂—TiO₂ coated steel. The coating resistance (R_coat) of PU—ATA/SiO₂—TiO₂ was determined to be 2956.90 kΩ·cm⁻². The R_coat of the PU—ATA/SiO₂—TiO₂ nanocomposite coating was found to be over 50% higher than the PU coating. The current measured along the scratched surface of the PU—ATA/SiO₂—TiO₂ coating was found to be very low (1.65 nA). The enhanced ATA/SiO₂—TiO₂ nanoparticles inhibited the entry of electrolytes into the coating interface, as revealed by scanning electron microscopy/energy dispersive X-ray spectroscopy and X-ray diffraction analysis of the degradation products. Water contact angle testing validated the hydrophobic nature of the PU—ATA/SiO₂—TiO₂ coating (θ = 115.4°). When the concentration of ATA/SiO₂—TiO₂ nanoparticles was 2 wt %, dynamic mechanical analysis revealed better mechanical properties. Therefore, the newly synthesised PU—ATA/SiO₂—TiO₂ nanocomposite provided excellent barrier and mechanical properties due to the addition of ATA/SiO₂—TiO₂ nanoparticles to the polyurethane, which inhibited material degradation and aided in the prolongation of the coated steel’s life.

将新合成的功能性纳米粒子 3-氨基-1,2,4-三唑 (ATA)/SiO ₂ -TiO ₂引入到聚氨酯 (PU) 基质中。电化学技术用于研究合成的PU-ATA/SiO ₂ -TiO ₂纳米复合涂层钢试样的阻隔性能。在天然海水中，电化学阻抗谱实验表明 PU-ATA/SiO ₂ -TiO ₂涂层钢具有出色的保护性能。PU-ATA/SiO ₂ -TiO ₂的涂层电阻( R _coat )被确定为2956.90 kΩ·cm ^-2。R_外套_发现PU-ATA/SiO ₂ -TiO ₂纳米复合涂层比PU涂层高50%以上。_{发现沿着 PU-ATA/SiO 2} -TiO ₂涂层的划痕表面测量的电流非常低（1.65 nA）。增强的 ATA/SiO ₂ -TiO ₂纳米颗粒抑制了电解质进入涂层界面，如扫描电子显微镜/能量色散 X 射线光谱和降解产物的 X 射线衍射分析所示。_{水接触角测试验证了PU-ATA/SiO 2} -TiO ₂涂层的疏水性( θ = 115.4°)。当 ATA/SiO₂ -TiO ₂纳米粒子为2 wt%，动态力学分析显示更好的力学性能。因此，新合成的PU-ATA/SiO ₂ -TiO ₂纳米复合材料由于在聚氨酯中添加了ATA/SiO ₂ -TiO ₂纳米颗粒，从而抑制了材料降解并有助于延长涂层的延展性，从而提供了优异的阻隔性和机械性能。钢的生命。