文献类型：期刊文献

英文题名：Ultrathin Al2O3 film modification on waterborne epoxy coatings by atomic layer deposition for augmenting the corrosion resistance

作者：Li, Jiajun[1];Ye, Xiaojun[1];Yan, Chi[1];Liu, Cui[1];Yuan, Xiao[1];Li, Hongbo[1];Xu, Jiahui[1];Tong, Hua[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：35

期号：31

外文期刊名：NANOTECHNOLOGY

收录：;EI(收录号：20242116125251);WOS:【SCI-EXPANDED(收录号:WOS:001225569500001)】；

基金：This work was financed by the Science and Technology Commission of Shanghai Municipality, China [Grant No. 21DZ1205700].

语种：英文

外文关键词：atomic layer deposition; waterborne epoxy resin; corrosion; surface modification

摘要：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 Al(2)O(3 )films 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 Al2O3-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 Al2O3-modified coating increased by 48 degrees compared to the unmodified coating, and the protection efficiency of the modified coating reached 99.81%. The Al2O3-modified coating demonstrated high anticorrosive efficiency and potential applications for metal anticorrosion in harsh marine environments.