Xiao Zhen1a，1c，Wei Le1a ，Jin Changbao1a ，Du Mingyang1a ，Liu Mengjun1a ， Huo Xuebiao1a ，He Bin2 ，Wang Yajuan1b ，Xu Zhichao1b ， Wang Shouren1a，1c
1a. School of Mechanical Engineering，1b. School of Materials Science and Engineering，1c. Shandong Key Laboratory of Surface Treatment and Intelligent Equipment for Metal Key Components， University of Jinan，Jinan 250022， China；2. Rizhao Port Oil Terminal Co. ， Ltd. ， Rizhao 276800， China
Abstract
Objective To address the issue of insufficient hydrophobicity and wear resistance on aluminum alloy surfaces under harsh conditions， a composite coating with long-term superhydrophobicity and high wear resistance is prepared on the aluminum alloy surface by integrating laser cladding technology， femtosecond laser micro-nano structure technology， low surface energy modification technology， and composite coating technology.
Methods First， an Al-18Si-5Mn-5Ni-3Ag alloy cladding layer was prepared on the surface of 5052 aluminum alloy substrate using laser cladding technology. Then， a honeycomb-like micro-nano surface structure was constructed on the alloy cladding layer using a femtosecond laser. Subsequently， the structured surface was modified with 1H，1H，2H，2H-perfluorodecyltriethoxysilane （FAS）. Next， modified SiO₂ particles were adhered onto the FAS-modified layer using fluoroethylene vinyl ether （FEVE） copolymer resin particles， forming a modified SiO2-FEVE coating.
Results and Discussion After FAS modification， the maximum peak value of the aluminum alloy surface isapproximately 0.75 μm. The water contact angle and rolling angle of the aluminum alloy surface are 156° and 7.1°， respectively， indicating that the aluminum alloy surface has achieved superhydrophobicity. However， after 50 and 100 friction cycles， the water contact angle of the aluminum alloy surface modified by FAS rapidly dropped to 137° and 116°， respectively， and the hydrophobic performance significantly decreased. When the mass ratio of FEVE resin particles to modified SiO2 particles is 50：1， the maximum peak value of the aluminum alloy surface coated with modified SiO₂-FEVE is approximately 0.65 μm， and the water contact angle and rolling angle are 157°and 6.3°， respectively， indicating enhanced superhydrophobicity. After 50 and 100 friction cycles， the water contact angle only dropped to 154° and 152°， respectively， indicating that the superhydrophobic performance of the modified coating has long-term stability.
Conclusion A composite coating composed of three materials—an alloy cladding layer， an FAS-modified layer， and a modified SiO2-FEVE coating—is fabricated on the surface of the aluminum alloy substrate. The composite coating exhibits stable and long-lasting superhydrophobicity with significantly improved wear resistance. Moreover， the preparation process is environmentally friendly， efficient， and cost-controllable.
Keywords： aluminum alloy； composite coating； long-term superhydrophobic performance； wear resistance
Get Citation: Xiao Zhen， Wei Le， Jin Changbao， et al. Preparation of composite coating on aluminum alloy surfaces with long-term superhydrophobicity and high wear resistance［J］. China Powder Science and Technology， 2026， 32（4）： 1-10.
Received: 2025-10-12, Revised: 2026-04-24, Online: 2026-06-05.
Funding：The research was supported by the National Natural Science Foundation of China (Grant No. 52375183) and "20 Measures" for Universities in Jinan (Grant No. 202534079).
DOI：10.13732/j.issn.1008-5548.2026.04.007
CLC No.：TB303； TB4
Type Code: A
Serial No.：1008-5548（2026）04-0001-10
