Li Jiajun, Ye Xiaojun, Yan Chi, Liu Cui, Yuan Xiao, Li Hongbo, Xu Jiahui, Tong Hua
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
Nanotechnology. 2024 May 17;35(31). doi: 10.1088/1361-6528/ad40b7.
The polar channels formed by the curing of waterborne anticorrosive coatings compromise their water resistance, leading to coating degradation and metal corrosion. To enhance the anticorrosive performance of waterborne coatings, this study proposed a novel method of depositing ultrathin AlOfilms on the surface of waterborne epoxy coatings by atomic layer deposition, a technique that can modify the surface properties of polymer materials by depositing functional films. The AlO-modified coatings exhibited improved sealing and barrier properties by closing the polar channels and surface defects and cracks. The surface structure and morphology of the modified coatings were characterized by x-ray photoelectron spectroscopy and scanning electron microscopy. The hydrophilicity and corrosion resistance of the modified coatings were evaluated by water contact angle measurement, Tafel polarization curve, and electrochemical impedance spectroscopy. The results indicated that the water contact angle of the AlO-modified coating increased by 48° compared to the unmodified coating, and the protection efficiency of the modified coating reached 99.81%. The AlO-modified coating demonstrated high anticorrosive efficiency and potential applications for metal anticorrosion in harsh marine environments.
水性防腐涂料固化形成的极性通道会损害其耐水性，导致涂层降解和金属腐蚀。为提高水性涂料的防腐性能，本研究提出了一种通过原子层沉积在水性环氧涂料表面沉积超薄AlO薄膜的新方法，该技术可通过沉积功能膜来改变聚合物材料的表面性能。AlO改性涂层通过封闭极性通道以及表面缺陷和裂缝，表现出改善的密封和阻隔性能。通过X射线光电子能谱和扫描电子显微镜对改性涂层的表面结构和形貌进行了表征。通过水接触角测量、塔菲尔极化曲线和电化学阻抗谱对改性涂层的亲水性和耐腐蚀性进行了评估。结果表明，与未改性涂层相比，AlO改性涂层的水接触角增加了48°，改性涂层的保护效率达到99.81%。AlO改性涂层显示出高防腐效率以及在恶劣海洋环境中用于金属防腐的潜在应用。
