Method for preparing superhydrophobic coating by adopting supersonic electric arc spaying technique
A supersonic arc and super-hydrophobic coating technology, which is applied in the coating, metal material coating process, melt spraying, etc., can solve the problems of unfavorable industrial production and practical application, complicated operation process, and difficulty in large-scale preparation. Achieve good self-cleaning performance, simple process, and good results
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[0040] Example 1:
[0041] In this embodiment, the base material is 316 stainless steel or glass, and the coating is well combined with the base material. The specific preparation method of the super-hydrophobic coating is as follows:
[0042] 1. For 316 stainless steel and glass, 60 mesh brown corundum sand is used for surface sandblasting. The air pressure for sandblasting is 0.5MPa and 0.3MPa respectively, so that the roughness meets the spraying requirements;
[0043] 2. Using the supersonic arc spraying method, using aluminum wire as the spraying material, an aluminum coating with a thickness of about 150 microns is formed on the surface of the substrate. Among them, the spraying parameters for controlling supersonic arc spraying are: current 100A, voltage 25V, compressed air pressure is 0.5MPa, spraying distance is 150mm, and supersonic arc gun moving speed is 20mm / s.
[0044] 3. The coating is sprayed and modified with a mass concentration of 1% polyurethane, and the super-hyd...
Example Embodiment
[0045] Example 2:
[0046] In this embodiment, the base material is AZ91D magnesium alloy, TC4 titanium alloy or aluminum alloy, and the coating is well combined with the base material. The specific preparation method of the super-hydrophobic coating is as follows:
[0047] 1. For AZ91D magnesium alloy, TC4 titanium alloy and aluminum alloy, 60 mesh brown corundum sand is used for surface sandblasting. The air pressure used for sandblasting is 0.5MPa, so that the roughness meets the spraying requirements;
[0048] 2. Using the supersonic arc spraying method, using copper wire as the spraying material, a copper coating with a thickness of about 200 microns is formed on the surface of the substrate. Among them, the spraying parameters for controlling supersonic arc spraying are: current 120A, voltage 25V, compressed air pressure is 0.5MPa, spraying distance is 150mm, and supersonic arc gun moving speed is 20mm / s.
[0049] 3. The coating is sprayed and modified with a mass concentration...
Example Embodiment
[0050] Example 3:
[0051] In this embodiment, the base material is copper sheet or ceramic tile, and the coating is well combined with the base material. The specific preparation method of the super-hydrophobic coating is as follows:
[0052] 1. Use 60 mesh brown corundum sand to roughen the surface of copper sheets and ceramic tiles. The air pressure used for sandblasting is 0.5MPa and 0.3MPa respectively, so that the roughness meets the spraying requirements;
[0053] 2. Using the supersonic arc spraying method, using zinc wire as the spraying material, a zinc coating with a thickness of about 250 microns is formed on the surface of the substrate. Among them, the spraying parameters for controlling supersonic arc spraying are: current 80A, voltage 20V, compressed air pressure is 0.5MPa, spraying distance is 150mm, and supersonic arc gun moving speed is 20mm / s.
[0054] 3. The coating is sprayed and modified with a mass concentration of 7% polytetrafluoroethylene, and the super-hyd...
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