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Preparation method of nano-graphite super-hydrophobic coating on surface of micro-arc oxidized ceramic layer

A super-hydrophobic coating, micro-arc oxidation technology, applied in anodizing and other directions, can solve the problems of complex process and high price of super-hydrophobic protective layer, and achieve a suitable for large-scale industrial production, low price, simple and easy flame burning. Effect

Inactive Publication Date: 2017-10-24
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problem of complex and expensive preparation of superhydrophobic protective layer on the surface of light metal alloy in the prior art, the present invention provides a preparation method of nano-graphite superhydrophobic coating on the surface of micro-arc oxidation ceramic layer, which not only has simple process, Easy to operate and low cost, suitable for large-scale industrial production

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  • Preparation method of nano-graphite super-hydrophobic coating on surface of micro-arc oxidized ceramic layer

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preparation example Construction

[0020] A preparation method of nano-graphite superhydrophobic coating on the surface of a micro-arc oxidation ceramic layer, comprising the steps of:

[0021] Step A, performing micro-arc oxidation treatment on the surface of the light metal alloy, so as to prepare a micro-arc oxidation ceramic layer with a thickness of 10-30 μm on the surface and high temperature resistance. Wherein, the micro-arc oxidation treatment on the surface of the light metal alloy includes: using a conductor (for example: aluminum wire, magnesium wire) to connect the light metal alloy to the anode copper rod, and placing the light metal alloy in the electrolyte, using the electrolytic cell as The cathode is subjected to micro-arc oxidation treatment, the temperature of the electrolyte is 20-30°C, and the voltage of the micro-arc oxidation treatment is 300-500V. The electrolyte solution includes sodium silicate at a concentration of 5-20 g / L, potassium hydroxide at a concentration of 1-10 g / L, glyceri...

Embodiment 1

[0026] A preparation method of nano-graphite superhydrophobic coating on the surface of a micro-arc oxidation ceramic layer, comprising the steps of:

[0027] Step a, successively use 200#, 600#, 1000#, 2000# sandpaper to polish the surface of the light metal alloy, and then use acetone, ethanol and deionized water to ultrasonically clean and dry to obtain the pretreated light metal alloy.

[0028] Step b, using a magnesium wire to connect the pretreated light metal alloy to the anode copper rod, and place the pretreated light metal alloy in an electrolyte, which contains a concentration of 10g / L sodium silicate , the concentration is 5g / L potassium hydroxide, the concentration is 5ml / L glycerol and the concentration is 2g / L borax, the micro-arc oxidation treatment is carried out with the electrolytic cell as the cathode, the temperature of the electrolyte is 20~30°C, the micro-arc oxidation treatment The voltage is 400V, so as to produce a micro-arc oxidation ceramic layer wi...

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Abstract

The invention discloses a preparation method of a nano-graphite super-hydrophobic coating on the surface of a micro-arc oxidized ceramic layer. The preparation method comprises the steps: carrying out micro-arc oxidization on the surface of a light metal alloy to prepare the micro-arc oxidized ceramic layer with a high-temperature-resistant surface and the thickness of 10-30mu m; burning the surface of the micro-arc oxidized ceramic layer at the temperature of 500-1000 DEG C for 5-30s by using a flame under the condition that oxygen is sufficient, and coating the surface of the micro-arc oxidized ceramic layer with a layer of nano-graphite to prepare the nano-graphite super-hydrophobic coating on the surface of the micro-arc oxidized ceramic layer. The preparation method is not only simple in process and easy to operate, but also low in cost and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of surface modification of a micro-arc oxidation ceramic layer, in particular to a method for preparing a nano-graphite superhydrophobic coating on the surface of a micro-arc oxidation ceramic layer. Background technique [0002] Light metal alloys (aluminum, magnesium) have many excellent properties such as good electrical conductivity, high strength, and strong plasticity, so they are widely used in transportation, furniture and building materials and other fields. In recent years, light metal alloys have been used to reduce the weight of new energy vehicles, but in practical applications, light metal alloys have problems such as poor corrosion resistance. [0003] Superhydrophobic materials have excellent superhydrophobicity and corrosion resistance, so they are widely used in daily life, industrial production and military equipment. For example, the surface of important outdoor instruments can be protect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/24C25D11/30
CPCC25D11/026C25D11/24C25D11/30
Inventor 陈飞于佩航左佑田昊阅朱鑫彬
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY