Super-hydrophobic porous aluminum alloy material and preparation method thereof
An aluminum alloy material and super-hydrophobic technology, applied in the coating process of metal materials, etc., can solve the problems of poor hydrophobic performance, high cost, complex manufacturing process equipment, etc., achieve good hydrophobicity, low cost, and good industrial application prospects Effect
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Embodiment 1
[0022] Firstly, the aluminum alloy plate is mechanically polished and polished to remove surface defects and oxide film, and cleaned with ethanol and deionized water for 15 minutes respectively. Soak the plate with 2mol / L hydrochloric acid solution for 15 minutes, wash it with deionized water, and dry it; mix 0.1mol / L copper nitrate and 4g / L sodium chloride and stir fully to make a bath; immerse the aluminum alloy plate in 30℃ ~40°C bath for 80 minutes, then fully washed with deionized water, and dried in an oven at 80-100°C. The superhydrophobic surface of the aluminum alloy can be prepared by immersing in stearic acid ethanol solution with a mass fraction of 1% for 30 minutes, drying at room temperature and atmospheric environment for 24 hours at a relative humidity of 60-75%. Test the wettability of this coating surface with OCA20 contact angle tester, the result shows that this surface and the contact angle of water are respectively 160 ± 2 ° and 154 ± 2 °, as figure 1 Sh...
Embodiment 2
[0024] First, the pure aluminum plate material is mechanically polished and polished to remove surface defects and oxide films, and then cleaned with ethanol and deionized water for 5 minutes respectively. Soak the plate with 0.5mol / L hydrochloric acid solution for 25 minutes, wash it with deionized water, and dry it; mix 0.015mol / L copper nitrate and 0.8g / L sodium chloride and stir fully to make a bath; immerse the aluminum plate material in 30 ℃~40℃ bath solution for 150 minutes, then fully washed with deionized water, and dried in an oven at 80-100℃. The superhydrophobic surface of the aluminum alloy can be prepared by immersing in stearic acid ethanol solution with a mass fraction of 0.2% for 50 minutes, drying at room temperature and atmospheric environment for 45 hours at a relative humidity of 60-75%. The wettability of the coating surface was tested with an OCA20 contact angle tester, and the results showed that the contact angles of the surface and water were 162±2° a...
Embodiment 3
[0026] First of all, the aluminum alloy plate is mechanically polished and polished to remove surface defects and oxide film, and cleaned with ethanol and deionized water for 35 minutes respectively. Soak the plate with 3mol / L hydrochloric acid solution for 5 minutes, wash it with deionized water, and dry it; mix 0.2mol / L copper nitrate and 5g / L sodium chloride and stir well to make a bath; immerse the aluminum alloy plate in 30℃ ~40°C bath for 30 minutes, then fully washed with deionized water, and dried in an oven at 80-100°C. The superhydrophobic surface of the aluminum alloy can be prepared by immersing in stearic acid ethanol solution with a mass fraction of 3% for 10 minutes, drying at room temperature and atmospheric environment for 24 hours at a relative humidity of 60-75%. The wettability of the coating surface was tested with an OCA20 contact angle tester, and the results showed that the contact angles of the surface and water were 161±2° and 154±2°, respectively.
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