Forming method of bionic porous structure with hydrophobic resistance reducing capability
A porous structure and forming method technology, applied in the field of metal surface treatment, can solve the problems of poor stability of the micro-nano bionic embossed structure, easy damage or even disappear of the embossed structure, difficulty in maintaining super-hydrophobic performance, etc., and achieve good lodging resistance , Excellent hydrophobic effect, good structural stability
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[0035] Example 1:
[0036] (1) Add the solutes ethylene glycol sulfate and ammonium fluoride into the solvent deionized water to fully dissolve and stir evenly to obtain an anodic oxidation solution. The concentration of the solutes is 30-50 mL / L of ethylene sulfate sulfate and 13 g / L of ammonium fluoride. ;
[0037] (2) The surface of the TC4 titanium alloy sample is degreasing with a degreasing agent, and then cleaned with deionized water. It is connected to the positive electrode of the anodized power supply, and the stainless steel plate is used as the cathode plate to connect to the negative electrode of the power supply. In the anodic oxidation solution, turn on the anodic oxidation power supply, gradually increase the oxidation voltage to 40V, and the oxidation time is 1h. During the oxidation process, the temperature of the solution is controlled at about 20°C by a chiller. After oxidation, turn off the oxidation power supply, rinse the sample with deionized water, a...
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[0042] Example 2:
[0043] (1) The surface of 5083 aluminum alloy is polished and pretreated to obtain the test sample after surface polishing. Put the polished 5083 aluminum alloy sample into deionized water for ultrasonic cleaning for 5 minutes, and blow dry to obtain a 5083 aluminum alloy sample with a clean surface;
[0044] (2) The femtosecond ultrafast laser was used to complete the preparation of periodic holes in 5083 aluminum alloy. The laser processing parameters are as follows: the laser wavelength is 1030 nm, the laser power is 13 W, the laser pulse frequency is 30 kHz, the beam scanning speed is 200 mm / s, the scanning path is linear scanning, and the scanning spacing is 60 μm.
[0045] (3) Low free energy substances such as silane or fluorocarbon coupling agent are injected into the grooves on the surface of the sample to obtain a surface biomimetic groove structure with superhydrophobic drag reduction ability.
[0046] (4) The surface wetting angle of the 5083 ...
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