Preparation and Properties of Superhydrophobic Conversion Film on Aluminium Alloy

• Published in: Cai liao gong cheng = Journal of materials engineering Vol. 46; no. 9; pp. 144 - 151
• Main Authors: Wan, Shan, Jiang, Dan, Cai, Guang-yi, Liao, Sheng-zhi, Dong, Ze-hua
• Format: Journal Article
• Language: Chinese
• Published: Beijing Beijing Institute of Aeronautical Materials 01.09.2018; Journal of Materials Engineering
• Subjects: Acid resistance; Alkaline cleaning; aluminium alloy; Aluminum base alloys; anti-corrosion; anti-friction; Aqueous solutions; Chemical composition; Chemical etching; Contact angle; Conversion; Corrosion prevention; Corrosion resistance; Emission analysis; Erosion resistance; Ferric chloride; Field emission microscopy; Fourier transforms; Friction resistance; FTIR spectrometers; Hydrophobic surfaces; Hydrophobicity; Iron chlorides; Morphology; Organic chemistry; Potassium permanganate; Protective coatings; Scanning electron microscopy; Self-assembly; self-cleaning; superhydrophobicity
• ISSN: 1001-4381; 1001-4381
• DOI: 10.11868/j.issn.1001-4381.2017.000509

A superhydrophobic conversion film on AA6061 aluminium alloy was prepared via ultrasonication-assistant chemical etching by FeCl3/HCl aqueous solution,KMnO4 passivation,and ultrasonic deposition of trichloro (1H,1H,2H,2H-heptadecafluorodecyl) silane. Field emission scanning electron microscopy (FESEM),contact angle test and Fourier transform infrared spectrometer (FTIR) were used to investigate the morphology,hydrophobicity,and chemical compositions of superhydrophobic conversion film, respectively. The results show that superhydrophobic surface exhibits a high contact angle of 153° and endows the Al matrix promising self-cleaning ability, resistance to acid or alkali erosion, anti-friction and anti-corrosion capability. Compared with the dipping method, ultrasonic preparation of superhydrophobic film on Al alloy surface can not only improve the homogeneity of self-assembly of PFCPS, but also enhance its bonding force with Al matrix and form a superhydrophobic film with good protective performance.