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Preparation method of high-temperature-resistant anodic oxide film layer

An anodizing film and anodizing technology, applied in anodizing, coating, surface reaction electrolytic coating, etc., can solve problems such as film peeling off, and achieve the effect of prolonging service life and improving protective ability.

Pending Publication Date: 2022-02-18
SUZHOU CHANGFENG AVIATION ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present application provides a method for preparing a high-temperature resistant anodic oxidation film layer, which at least partially solves the Al 2 o 3 The problem that the film layer is prone to fall off under temperature shock

Method used

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  • Preparation method of high-temperature-resistant anodic oxide film layer
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preparation example Construction

[0034] The embodiment of the present application provides a method for preparing a high temperature resistant anodic oxidation film layer, which specifically includes:

[0035] Pre-treatment: remove impurities and naturally formed oxide film on the surface of the parts, and eliminate the residual stress generated by the parts during the machining process;

[0036] Anodizing: immerse the pre-treated parts in the anodizing solution to form an anodic oxidation film on the surface of the aluminum alloy;

[0037] Coloring: immerse the anodized parts into the coloring solution for coloring treatment;

[0038] Color fixing: Dip the colored parts into the color fixing solution for color fixing.

[0039] Preferably, the anodic oxidation solution is sulfuric acid, the concentration range is 150-200g / L, and the Al in the anodic oxidation solution 3+ The concentration is less than 20g / L, the cathode material is lead plate, the voltage range is 14-15V, and the temperature range is 11-13°...

Embodiment 2A12

[0055] In this embodiment, the 2A12 aluminum alloy is used as the experimental part, and the method refers to Figure 1-2 , including the following steps:

[0056] S101. Pretreatment: remove impurities on the surface of the parts and the naturally formed oxide film, and eliminate the residual stress of the parts during the machining process.

[0057] S1011. Mounting and hanging: use aluminum tooling to mount and hang parts.

[0058] S1012. Chemical degreasing: Put the parts into the chemical degreasing liquid to clean the surface oil. The chemical degreasing liquid is Na 3 PO 4 ˙12H 2 O, Na 2 CO 3 ˙10H 2 O and Na 2 SiO 3 , the concentration ranges are 40-60g / L, 20-30g / L and 2-5g / L respectively, the temperature range of this process is 50-70°C, and the time range is 10-15min. After degreasing, wash the parts in running hot water once, and then wash them in running cold water again.

[0059] S1013. Heat treatment: Put the degreased parts into a heating device for heat ...

Embodiment 2

[0067] In this embodiment, the 2A12 aluminum alloy is used as an experimental part, which is different from the temperature of the anodic oxidation process in Example 1, and specifically includes the following steps:

[0068] S201. Pretreatment: remove impurities on the surface of the parts and the naturally formed oxide film, and eliminate the residual stress of the parts during the machining process.

[0069] S2011, mounting and hanging: use aluminum tooling to mount and hang parts.

[0070] S2012, chemical degreasing: put the parts into the chemical degreasing liquid to clean the surface oil, the chemical degreasing liquid is Na 3 PO 4 ˙12H 2 O, Na 2 CO 3 ˙10H 2 O and Na 2 SiO 3 , the concentration ranges are 40-60g / L, 20-30g / L and 2-5g / L respectively, the temperature range of this process is 50-70°C, and the time range is 10-15min. After degreasing, wash the parts in running hot water once, and then wash them in running cold water again.

[0071] S2013. Heat treat...

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Abstract

The invention provides a preparation method of a high-temperature-resistant anodic oxide film layer, and belongs to the technical field of anodic oxidation. The preparation method specifically comprises the following steps of: pretreatment, which is implemented by removing impurities and a naturally formed oxidation film on the surface of a part, and eliminating residual stress generated by the part in a machining process; anodic oxidation, which is implemented by immersing a pretreated part in anodic oxidation liquid, and generating a layer of anodic oxidation film on the surface of aluminum alloy; coloring, which is implemented by immersing the part subjected to anodic oxidation treatment in coloring liquid for coloring treatment; and color fixing, which is implemented by immersing the colored part in a color fixing solution for color fixing treatment, wherein the color fixing solution is a sealing agent solution. By means of the preparation method, the high-temperature-resistant degree of the anodic oxide film layer of the aluminum or aluminum alloy part is improved.

Description

technical field [0001] The present application relates to the technical field of anodic oxidation, in particular to a method for preparing a high-temperature resistant anodic oxidation film layer. Background technique [0002] Anodic oxidation treatment of aluminum and aluminum alloy parts can produce a layer of Al on the surface 2 o 3 The membrane layer is porous and absorbent. Because of Al 2 o 3 These characteristics of the film layer are often post-treated after anodic oxidation, for example, dyeing treatment, can obtain aluminum alloy products of different colors, and meet the use requirements under different conditions. [0003] However, the resulting Al 2 o 3 The expansion coefficient difference between the film layer and the substrate is large. Under the impact of temperature, Al 2 o 3 The film layer has a tendency to fall off, and the higher the temperature, the greater the tendency to fall off, making the oxide film layer unstable and affecting the performa...

Claims

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Application Information

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IPC IPC(8): C25D11/04C25D11/14C25D11/16C25D11/08C25D11/24
CPCC25D11/04C25D11/14C25D11/16C25D11/08C25D11/243C25D11/24
Inventor 王剑
Owner SUZHOU CHANGFENG AVIATION ELECTRONICS