Method for preparing aluminum-copper alloy microarc oxidation film

An aluminum-copper alloy, micro-arc oxidation technology, applied in the direction of anodic oxidation, etc., can solve the problems of burning parts, restricting the application of aluminum-copper alloy, and many defects in the oxide film layer, and achieves easy proportioning, easy operation and control, and rich sources Effect

Inactive Publication Date: 2011-05-04
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the copper content reaches 4%, the CuAl 2 The phase dissolves quickly and often becomes the center of current gathering, which easily causes the film layer in this part to be overhe

Method used

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  • Method for preparing aluminum-copper alloy microarc oxidation film
  • Method for preparing aluminum-copper alloy microarc oxidation film
  • Method for preparing aluminum-copper alloy microarc oxidation film

Examples

Experimental program
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Example Embodiment

[0016] Example 1

[0017] In this embodiment, the test material is cast aluminum copper alloy ZL201, according to the process flow figure 1 To prepare the micro-arc oxidation film, the composition, process parameters and film properties of the electrolyte composition are shown in Table 1:

[0018] Table 1. Composition, process parameters and film performance of the electrolyte composition

[0019]

[0020] Note: 1. The power supply voltages used in Table 1 are all 550V~700V.

[0021] 2. The test temperature is not more than 35℃.

[0022] 3. The corrosion resistance of the film is tested in accordance with the experimental standards required by the National Standard of the People’s Republic of China GB / T 10125-1997 (eqv ISO 9227: 1990), using continuous spray, the salt spray test cycle is 96 hours, according to China The level after assessment implemented by the People's Republic of China National Standard GB6461-86.

[0023] 4. The hardness is measured with a small load Vickers hardnes...

Example Embodiment

[0024] Example 2

[0025] In this embodiment, the test material is a wrought aluminum copper alloy 2A14, according to the process flow figure 1 To prepare the micro-arc oxidation film, the composition, process parameters and film properties of the electrolyte composition are shown in Table 2:

[0026] Table 2. Comprehensive table of composition, process parameters and film performance of electrolyte composition

[0027]

[0028] Note: 1. The power supply voltages used in Table 2 are all 550V~700V.

[0029] 2. The test temperature is all carried out under the condition of not more than 35℃.

[0030] 3. The corrosion resistance of the film is tested in accordance with the experimental standards required by the National Standard of the People’s Republic of China GB / T 10125-1997 (eqv ISO 9227: 1990), using continuous spray, the salt spray test cycle is 96 hours, according to China The level after assessment implemented by the People's Republic of China National Standard GB6461-86.

[0031]...

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Abstract

The invention relates to the field of aluminum-copper alloy surface treatment and aims to provide a method for preparing an aluminum-copper alloy microarc oxidation film, which solves the problem on the application of microarc oxidation in the production of aluminum-copper alloy. The preparation method is characterized in that a special electrolyte composite is adopted to prepare the microarc oxidation film, and the property of a generated film can be effectively changed by controlling the proportion among technological parameters, such as electrical parameters, electrolyte composite systems, processing time and the like. The preparation method has the advantages that the electrolyte composite has abundant sources, and is environmentally-friendly and easy for proportioning; and the technological process for preparing the film is simple and is easy to operate and control, and the prepared film has excellent corrosion resistance.

Description

Technical field: [0001] The invention relates to the field of surface treatment of aluminum-copper alloys. Background technique: [0002] Aluminum-copper alloy has high mechanical strength, good plasticity and weldability in annealed state, and good heat treatment effect, and is widely used in aerospace, machinery manufacturing and other fields. However, aluminum-copper alloys have poor corrosion resistance and are prone to localized corrosion, intergranular corrosion and stress corrosion fatigue. Surface treatment of aluminum-copper alloy is an effective method to improve its corrosion resistance. At present, anodic oxidation is mainly used, and anodic oxidation of aluminum-copper alloy has always been a difficult problem in surface treatment. When the copper content reaches 4%, the CuAl 2 The phase dissolves quickly and often becomes the center of current gathering, which easily causes the film layer in this part to be overheated and dissolved, resulting in more defects ...

Claims

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Application Information

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IPC IPC(8): C25D11/04C25D11/06
Inventor 陈斌侯正全崔恩强邱立新李宝辉
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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