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Preparation method of anodic oxide film

An anodic oxidation film and anodic oxidation technology, applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of film cracking, high gas corrosiveness, aluminum substrate and reaction particle size exceeding the standard, etc., to achieve Improves corrosion resistance and voltage resistance, and improves service life

Pending Publication Date: 2022-07-08
广东江丰电子材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The oxide film is prepared by the sulfuric acid method. The working temperature of the OLED vacuum dry etching equipment and the corrosiveness of the gas are relatively high. The sulfuric acid method anode film equipment is prone to film cracking when it is running in the middle and late stages, and the gas is corroded by the process gas. The particle size exceeds the standard due to the reaction between the aluminum substrate and the

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  • Preparation method of anodic oxide film
  • Preparation method of anodic oxide film
  • Preparation method of anodic oxide film

Examples

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Embodiment 1

[0060] This embodiment provides a method for preparing an anodic oxide film, and the flow chart of the preparation method is as follows: figure 1 As shown, the preparation method comprises the following steps:

[0061] (1) Degreasing treatment: The aluminum alloy casting is immersed in 200g / L of degreasing agent, and soaked for 5 minutes at 60°C. The degreasing agent is composed of 25% sulfuric acid, 1% sodium alkyl sulfonate, and the balance is water;

[0062] (2) The first water washing treatment: repeatedly rinse the aluminum alloy casting with deionized water for 4 minutes;

[0063] (3) Alkaline etching treatment: Immerse the aluminum alloy casting into 40g / L sodium hydroxide solution, and soak it at 50°C for 2min;

[0064] (4) The second water washing treatment: repeatedly rinse the aluminum alloy casting with deionized water for 4 minutes;

[0065] (5) Neutralization treatment: immerse the aluminum alloy casting into 200g / L nitric acid solution for 15min;

[0066] (6)...

Embodiment 2

[0072] This embodiment provides a preparation method of an anodic oxide film, and the preparation method includes the following steps:

[0073] (1) Degreasing treatment: Immerse the aluminum alloy castings in 180g / L degreasing agent, soaked at 55°C for 10 min. The degreasing agent is composed of 20% sulfuric acid, 1% fatty alcohol polyoxyethylene ether, 1% alkylsulfonic acid Sodium and the balance are composed of water;

[0074] (2) The first water washing treatment: repeatedly rinse the aluminum alloy casting with deionized water for 3 minutes;

[0075] (3) Alkaline etching treatment: Immerse the aluminum alloy casting into 30g / L sodium hydroxide solution, and soak it at 45°C for 3min;

[0076] (4) The second water washing treatment: repeatedly rinse the aluminum alloy casting with deionized water for 3 minutes;

[0077] (5) Neutralization treatment: Immerse the aluminum alloy casting into 190g / L nitric acid solution for 20min;

[0078] (6) The third water washing treatmen...

Embodiment 3

[0084] This embodiment provides a preparation method of an anodic oxide film, and the preparation method includes the following steps:

[0085] (1) Degreasing treatment: Immerse the aluminum alloy castings in 220g / L degreasing agent, soaked at 65°C for 10min. The degreasing agent is composed of 30% sulfuric acid, 1.5% fatty alcohol polyoxyethylene ether, 0.3% alkylsulfonic acid Sodium and the balance are composed of water;

[0086] (2) The first water washing treatment: repeatedly rinse the aluminum alloy casting with deionized water for 5 minutes;

[0087] (3) Alkaline etching treatment: Immerse the aluminum alloy casting into 50g / L sodium hydroxide solution, and soak it at 55°C for 1min;

[0088] (4) The second water washing treatment: repeatedly rinse the aluminum alloy casting with deionized water for 3 minutes;

[0089] (5) Neutralization treatment: Immerse the aluminum alloy casting into 210g / L nitric acid solution for 10min;

[0090] (6) The third water washing treat...

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Abstract

The invention relates to a preparation method of an anodic oxide film. The preparation method comprises the steps of degreasing treatment, alkali corrosion treatment, neutralization treatment, anodic oxidation treatment, ultrasonic cleaning treatment and hole sealing treatment which are sequentially carried out. By improving process parameters, adopting mixed acid of 6-40 g / L oxalic acid and 14-16 g / L sulfuric acid for anodic oxidation and recombining all basic operations, the corrosion resistance and voltage resistance, especially HCl corrosion resistance, of a coating film can be obviously improved, the problems of corrosion, cracking and the like of an anodic oxide film on the surface of a part of vacuum dry etching equipment for an OLED are directly solved, and the service life of the vacuum dry etching equipment for the OLED is prolonged. And the service life of the equipment in the cavity is obviously prolonged.

Description

technical field [0001] The invention belongs to the technical field of processing, and in particular relates to a preparation method of an anodic oxide film. Background technique [0002] As the domestic display market demand continues to expand, OLED screens are light in weight, thin in thickness, require no backlight, have good display effects, simple manufacturing processes, short response times, good low-temperature characteristics, large viewing angles, and can significantly save energy. Power and other advantages, has become a mainstream product in the display field. However, the anodic oxide film on the surface of the parts of the vacuum dry engraving equipment in the manufacturing process of the OLED screen is prone to problems such as oxide film corrosion and cracking in the later stage of production. [0003] CN108441918A discloses an aluminum alloy surface treatment process, which includes the following steps: sandblasting, degreasing, polishing, anodizing, activ...

Claims

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Application Information

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IPC IPC(8): C25D11/10C25D11/08C25D11/16C25D11/18
CPCC25D11/10C25D11/08C25D11/16C25D11/18
Inventor 姚力军潘杰王学泽王青松赵丽李延浩
Owner 广东江丰电子材料有限公司