Waterborne robust superhydrophobic PFDTES@TiO2-PU coating with stable corrosion resistance, long-term environmental adaptability, and delayed icing functions on Al–Li alloy

• DOI: 10.1016/j.jmrt.2024.08.131
• Publication Date: 2024-08-23T08:25:45Z
• Authors: Xuewu Li; Chenghu Ma; Tian Shi; Hejie Yang; Chuanwei Zhang; Wei Qi; Chen Li; Rongrong Liu; Weiping He; Yuanhai Liu
• Keywords: Superhydrophobic coating; Sandpaper

Aluminum–Lithium (Al–Li) alloys widely used in aerospace manufacture are highly susceptible to corrosion, which limits their industrial applications. Herein, 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) is as a modifier for low-surface-energy treatment of TiO2 nanoparticles. The water-based polyurethane (PU) made binder achieve tight bonding between modified ceramic particles and Al–Li alloy, thus resulting the extremely-feasible air-spraying preparation superhydrophobic coating with strong abrasion resistance. water contact angle (CA) as-prepared achieves 160 ± 0.83°, rolling (SA) low 5.95 0.59°. surface structure, organization composition further characterized using SEM, EDS, XPS laser confocal microscopy. Meanwhile, electrochemical impedance potentiodynamic polarization tests performed corrosion characterization. results show that potential such increases by 170 mV compared substrate, current density decreases two orders magnitude, modulus orders. inhibition rate 98.8%, indicating resistance has been significantly enhanced. In addition, mechanical robustness stability evaluated confirmed sandpaper rubbing test. It also possesses great self-cleaning, anti-pollution thermostable behaviors, thereby allowing them work extreme manufactures. Moreover, exhibits excellent adaptability various materials anti-icing property. This sheds positive insights enlarging applications multifunctional coatings fields.