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

Active Publication Date: 2017-05-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people have prepared injection-type lubricating surfaces on the surface of some metals and glass substrates, but there are still problems such as expensive equipment, complicated processes, difficulty in large-scale preparation, and environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention belongs to the technical field of metal surface treatment and modification and particularly relates to a preparation method of an aluminum-based liquid injection type drag reduction surface. The preparation method comprises the following specific steps: (1) preparing a micron-sized rough surface on an aluminum surface through a chemical etching method; (2) generating a zinc-aluminum oxide thin film through a hydrothermal synthesis method and forming a micro-nano cooperative binary structure on the aluminum surface; (3) modifying with a low-surface energy substance to form a super-hydrophobic surface; (4) injecting lubricating oil into the super-hydrophobic surface to form the injection type drag reduction surface. The prepared injection type drag reduction surface has wetting resistance to water, alcohol, rapeseed oil, industrial white oil and other liquid, a contact angle for the water is about 110 degrees, a sliding angle is less than 3 degrees, and the surface has a good drag reduction effect on the water, the alcohol and the No. 15 industrial white oil. The preparation method provided by the invention is simple and practical, and low in requirements for equipment; a used chemical etching and hydrothermal synthesis technology is relatively mature, so that the preparation of the large-area drag resistance surface can be realized, and industrial manufacture is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment and its modification, and in particular relates to a method for preparing an aluminum-based liquid injection type drag-reducing surface. Background technique [0002] In recent years, the research on superphobic surfaces has gained widespread attention, mainly because superphobic surfaces have very broad application prospects in industrial and agricultural production and people's daily life. The super-hydrophobic surface can be used on the shell of the ship and the surface of the submarine to prevent seawater corrosion and water biological pollution. At the same time, the super-hydrophobic surface has the effect of reducing drag and can increase its driving speed. In addition, the super-thin surface can also be used for the transportation of oil pipelines, preventing the adhesion of oil on the pipeline wall and reducing the loss during oil transportation. The reason why the super-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/20C23C26/00
CPCC23C26/00C23F1/20
Inventor 张海峰陈伟平刘晓为脱艳景
Owner HARBIN INST OF TECH
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