Preparation method of aluminum-based liquid injection type drag reduction surface
A liquid injection, aluminum-based technology, applied in metal material coating process, coating and other directions, can solve the problems of difficult large-area preparation, complex process, environmental pollution, etc., achieve good self-cleaning and drag reduction performance, and simple preparation method , Improve the effect of corrosion resistance
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specific Embodiment approach 1
[0021] Embodiment 1: A method for preparing an aluminum-based liquid-injected drag-reducing surface, the method comprising the following process steps:
[0022] Step 1: Use hydrochloric acid solution containing copper chloride as the corrosion solution, soak the aluminum sheet in the corrosion solution for 3-6 minutes to obtain an aluminum surface with a micron-scale structure, and then heat the aluminum sheet at 200-350°C for 10- 30min;
[0023] Step 2: adopt concentration to be the zinc nitrate hexahydrate (Zn(NO 3 ) 2· 6H 2 O) and a 1:1 mixed solution of hexamethylenetetramine as a hydrothermal synthesis solution, place the aluminum sheet heated at a high temperature in step 1 in a constant temperature hydrothermal synthesis solution at 95°C for 3-6 hours of hydrothermal synthesis , so that the surface of the aluminum sheet is prepared with a petal-shaped micro-nano double rough structure (at this time, the surface of the aluminum sheet has a super-hydrophilic property);...
specific Embodiment approach 2
[0026] Embodiment 2: The method for preparing an aluminum-based liquid-injected drag-reducing surface described in Embodiment 1, in step 3, the low surface energy material is fluorosilane, long-chain fatty acid or polytetrafluoroethylene material.
specific Embodiment approach 3
[0027] Specific embodiment three: the preparation method of aluminum-based liquid injection type drag-reducing surface described in specific embodiment one, in step one, the concentration of copper chloride in the hydrochloric acid solution containing copper chloride is 0.1-0.3M , the concentration of hydrochloric acid is 0.5-2M, and the concentration ratio of the two is 1:5.
[0028] Embodiment 4: The method for preparing the aluminum-based liquid-injected drag-reducing surface described in Embodiment 1, in step 4, the lubricating oil has an insoluble content with water, alcohol, rapeseed oil or industrial white oil characteristic.
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