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Aluminum alloy surface protection method based on visible light laser absorption and application

A technology of aluminum alloy surface and laser absorption, which is applied in the field of metallurgy, can solve the problems of insufficient bonding force, coating peeling off, low efficiency, etc., and achieve the effects of reducing reflection, increasing service life, and reducing burning

Active Publication Date: 2021-12-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the existing technology also prepares a thin film layer of inorganic substances on the metal surface by means of physical deposition. This method uses a wide variety of inorganic salts, but the efficiency of the preparation process is very low.
In addition, coatings with light-absorbing properties can also be prepared by coating and film-forming, but the coating peeling off and solvent volatilization caused by insufficient binding force may pollute the subsequent vacuum environment, and the binding force is usually not up to to request

Method used

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  • Aluminum alloy surface protection method based on visible light laser absorption and application
  • Aluminum alloy surface protection method based on visible light laser absorption and application
  • Aluminum alloy surface protection method based on visible light laser absorption and application

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Such as figure 1 As shown in the flow chart, the method for protecting the surface of aluminum alloy based on visible light laser absorption described in this embodiment includes the following steps:

[0048] (1) Soak the processed aluminum alloy parts in the degreasing solution with an ultrasonic cleaning device, take them out and put them in an alkali etching tank to remove the oxide film, and finally remove the "ash" produced in the alkali etching step through a neutralization tank to remove the test material. parts surface grease and natural oxide film; the bath composition and operating parameters of each step of the pretreatment are shown in Table 2 below:

[0049] Table 2 pretreatment process parameters

[0050]

[0051] (2) In a 12wt% sulfuric acid solution, the aluminum alloy workpiece is anodized in the form of direct current, the temperature of the solution is controlled at 5°C, and the control voltage is gradually increased from 12V to 20V for about 1 hour...

Embodiment 2

[0059] Such as figure 1 As shown in the flow chart, the method for protecting the surface of aluminum alloy based on visible light laser absorption described in this embodiment includes the following steps:

[0060] (1) Soak the processed aluminum alloy parts in the degreasing solution with an ultrasonic cleaning device, take them out and put them in an alkali etching tank to remove the oxide film, and finally remove the "ash" produced in the alkali etching step through a neutralization tank to remove the test material. parts surface grease and natural oxide film; the bath composition and operating parameters of each step of the pretreatment are the same as in Example 1;

[0061] (2) In a 12wt% sulfuric acid solution, the aluminum alloy workpiece is anodized in the form of direct current, the temperature of the solution is controlled at 5°C, and the control voltage is gradually increased from 12V to 20V for about 1 hour. Form a regular porous aluminum oxide layer (the pore st...

Embodiment 3

[0067] Such as figure 1 As shown in the flow chart, the method for protecting the surface of aluminum alloy based on visible light laser absorption described in this embodiment includes the following steps:

[0068] (1) Soak the processed aluminum alloy parts in the degreasing solution with an ultrasonic cleaning device, take them out and put them in an alkali etching tank to remove the oxide film, and finally remove the "ash" produced in the alkali etching step through a neutralization tank to remove the test material. parts surface grease and natural oxide film; the bath composition and operating parameters of each step of the pretreatment are the same as in Example 1;

[0069] (2) In 10wt% sulfuric acid solution, the aluminum alloy workpiece is anodized in the form of direct current, the temperature of the solution is controlled at 6°C, and the control voltage is gradually increased from 12V to 20V for about 1 hour. Form a regular porous alumina layer;

[0070] (3) Place ...

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Abstract

The invention belongs to the technical field of metallurgy, and particularly relates to a special surface treatment method of an aluminum-based material, in particular to a laser low-reflection and ablation-resistant surface protection method for aluminum alloy visible light wave bands. According to the aluminum alloy surface protection method based on visible light laser absorption, a functional oxidation film based on an anodized layer is prepared on the surface of aluminum alloy by means of metal surface treatment, and in the forming process of the protection film, metal with heat conduction performance and metal oxide with visible light absorption performance are sequentially deposited in holes in a two-time electrochemical deposition mode, an absorption-heat conduction heat diffusion process is formed, heat is rapidly diffused to the surrounding environment through the deposited metal, and reflection of the visible light wave bands is effectively reduced. Phase change and dust fall caused by excessive single-point heat absorption are avoided, and firing of the technical surface due to the heat effect is reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a special surface treatment method for aluminum-based materials, in particular to a low-reflection and anti-ablation surface protection method for aluminum alloys in the visible light band. Background technique [0002] Material surface modification technology is to endow the surface with new properties such as high temperature resistance, corrosion resistance, wear resistance, and electrical conductivity on the premise of maintaining the original properties of the material, so as to improve the performance of the material in high-speed, high temperature, high pressure, heavy load, and corrosive medium environments. It has great economic significance and promotion value. [0003] In the range of light wavelengths used in large-scale high-energy laser equipment, visible light wavelengths (400nm-780nm) are unavoidable regions during laser operation, such as double fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25D11/18C25D11/22C25D11/24
CPCC25D11/16C25D11/18C25D11/22C25D11/246
Inventor 卢礼华赵航曹永智崔耀文高敬翔陈家轩
Owner HARBIN INST OF TECH
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