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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

Active Publication Date: 2015-04-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although, in terms of wettability, the above methods can effectively prepare superhydrophobic surfaces, but these existing methods also have their own shortcomings and limitations, such as complicated and difficult to control the operation process, difficult to prepare on a large scale, etc. These defects are not conducive to the needs of industrialized production and practical application
In addition, each of the above methods can only prepare superhydrophobic surfaces on specific one or two materials, which is not universally applicable.

Method used

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  • Method for preparing superhydrophobic coating by adopting supersonic electric arc spaying technique
  • Method for preparing superhydrophobic coating by adopting supersonic electric arc spaying technique
  • Method for preparing superhydrophobic coating by adopting supersonic electric arc spaying technique

Examples

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Effect test

Embodiment 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 concrete preparation method of this superhydrophobic coating is as follows:

[0042] 1. Use 60-mesh brown corundum sand to roughen the surface of 316 stainless steel and glass. The air pressure used for sandblasting is 0.5MPa and 0.3MPa respectively, so that the roughness can meet the spraying requirements;

[0043] 2. Using the supersonic arc spraying method, aluminum wire is used as the spraying material to form an aluminum coating with a thickness of about 150 microns on the surface of the substrate. Among them, the spraying parameters for controlling supersonic arc spraying are: current 100A, voltage 25V, compressed air pressure 0.5MPa, spraying distance 150mm, supersonic arc gun moving speed 20mm / s.

[0044] 3. Use polyurethane with a mass concentration of 1% to spray and modify the coating, and dry at 100°C for 2 hours to obtain a supe...

Embodiment 2

[0046] In this embodiment, the base material is AZ91D magnesium alloy, TC4 titanium alloy or aluminum alloy, and the coating is well bonded to the base material. The concrete preparation method of this superhydrophobic coating is as follows:

[0047] 1. For AZ91D magnesium alloy, TC4 titanium alloy and aluminum alloy, use 60-mesh brown corundum sand for surface roughening treatment. The air pressure used for sandblasting is 0.5MPa to make the roughness meet the spraying requirements;

[0048] 2. Using the supersonic arc spraying method, copper wire is used as the spraying material to form a copper coating with a thickness of about 200 microns on the surface of the substrate. Among them, the spraying parameters for controlling supersonic arc spraying are: current 120A, voltage 25V, compressed air pressure 0.5MPa, spraying distance 150mm, supersonic arc gun moving speed 20mm / s.

[0049] 3. Use polytetrafluoroethylene with a mass concentration of 5% to spray and modify the coati...

Embodiment 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 concrete preparation method of this superhydrophobic 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 can meet the spraying requirements;

[0053] 2. Using the supersonic arc spraying method, zinc wire is used as the spraying material to form a zinc coating with a thickness of about 250 microns on the surface of the substrate. Among them, the spraying parameters for controlling supersonic arc spraying are: current 80A, voltage 20V, compressed air pressure 0.5MPa, spraying distance 150mm, supersonic arc gun moving speed 20mm / s.

[0054] 3. Use polytetrafluoroethylene with a mass concentration of 7% to spray and modify the coating, and dry at 250°C for 2 hours to obtain a...

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Abstract

The invention discloses a method for preparing a superhydrophobic coating by adopting a supersonic electric arc spaying process. The method comprises the following steps of: firstly, roughening the surface of a substrate; then preparing a coating on the surface of the substrate by adopting a supersonic electric arc spaying technique; and finally, modifying the surface of the coating with a substance with low surface energy, and drying to form a superhydrophobic surface. The method disclosed by the invention has the advantages of easy operation, low cost and good repeatability and is suitable for industrial production. In addition, the method can be used for preparing superhydrophobic coatings on a variety of surfaces such as metal surfaces, glass surfaces and tile surfaces, thus the scope of application of the superhydrophobic coating can be broadened, and large-scale production with high market value can be archived.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophobic material, in particular to a method for preparing a superhydrophobic coating by supersonic arc spraying. Background technique [0002] Superhydrophobicity is a unique wettability of solid surfaces, which means that the contact angle between the surface and water is greater than 150°, and the rolling angle is less than 10°. Due to the special wetting properties of the super-hydrophobic surface, it can be used in self-cleaning of industrial devices and buildings, self-cleaning and anti-flashover of high-voltage electrical equipment, application of biomedical and bionic materials, pipeline waterproofing and corrosion resistance, drag reduction and energy saving , power transmission towers and cables have potential application prospects in many aspects such as anti-ice and snow in winter. It is precisely because of such a demand that it is extremely important to study the preparation metho...

Claims

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Application Information

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IPC IPC(8): C23C4/12C23C4/08C23C4/18C23C4/131
CPCC23C4/08C23C4/18
Inventor 李华陈秀勇黄晶龚永峰刘奕
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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