A kind of preparation method of aluminum or aluminum alloy anodized film

An anodic oxidation film and anodic oxidation technology, which is applied in the field of preparation of aluminum or aluminum alloy anodic oxidation film, can solve the problems of limited flexibility, poor flexibility of anodic oxidation film, and low production efficiency, and achieve good flexibility and Effects of deformation properties, shortened oxidation time, and cost savings in freezing

Active Publication Date: 2014-10-01
ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The anodic oxide film has much better corrosion resistance than the chemical oxide film, but the anodic oxide film is hard and thick, so it is not suitable when deformation is required. The chemical oxide film has good deformation properties , but its corrosion resistance is far inferior to that of the anodic oxide film. When the environment requires high corrosion resistance, the chemical oxide film cannot meet the requirements
There are few domestic and foreign patent reports on flexible anodic oxide films. Patent CN200610047349.6 reports a flexible anodic oxide film. The effect of flexibility, so that the corrosion resistance cannot be guaranteed and the flexibility is relatively limited
The method of anodic oxidation can obtain good corrosion resistance, but the existing anodic oxidation electrolyte has defects, generally including sulfuric acid and aluminum sulfate, the flexibility of the obtained anodic oxidation film is not very good, and the Vickers hardness should be in the oxidation state. It can reach about 150 after 60 minutes, so the oxidation time is long and the production efficiency is relatively low. If the oxidation time is short, the hardness of the oxide film of the test piece is much higher than 150. Therefore, there are certain shortcomings.

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  • A kind of preparation method of aluminum or aluminum alloy anodized film
  • A kind of preparation method of aluminum or aluminum alloy anodized film

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[0018] The preparation process of the aluminum anodic oxidation film of the present invention includes degreasing→alkaline corrosion→acid light extraction→anodic oxidation→cleaning and drying, and the aluminum anodic oxidation film includes pure aluminum anodic oxidation film or aluminum alloy anodic oxidation film.

[0019] Wherein, for the degreasing function, the selected aluminum or aluminum alloy is put into an organic solvent to clean grease, and the organic solvent is at least one of acetone, butanone, ethyl acetate, and butyl acetate.

[0020] The function of the alkaline corrosion is to put the degreased aluminum or aluminum alloy into an alkaline degreasing agent to remove the oxide film naturally formed on the surface of the substrate. The alkaline degreasing agent has a concentration of 1- 10% dilute alkaline solution, treated at 10-80°C for 3-20 minutes, the present invention uses the model LD-103 alkaline solution manufactured by Shenzhen Liweida Chemical Co., Ltd...

Embodiment 1

[0026] Select an aluminum foil with a thickness of 20 microns, wash and degrease it with acetone; then treat it with a degreasing agent with a concentration of 1% for 3 minutes at a temperature of 10°C to remove the oxide film naturally formed on the surface of the aluminum material; then pass it through dilute acid To emit light, use a light-emitting agent (aluminum surface modifier) ​​with a concentration of 1% for light emission, and treat it at room temperature for 0.1 minutes; the surface-adjusted test piece is immersed in 10% sulfuric acid, 1% pyruvic acid, 0.1% aluminum sulfate, and 0.1% oxalic acid solution In the electrolyte solution with the remaining water, the temperature is controlled at 20°C, stirred slightly, and oxidized under the action of alternating current, the frequency of alternating current is 1 Hz, the voltage is 8 volts, and the current density is 0.01A / dm2. The oxidation time was 1 minute. After the oxidation is completed, it is washed and dried with ...

Embodiment 2

[0028] Select an aluminum foil with a thickness of 1000 microns, wash and degrease it with methyl ethyl ketone; then treat it with a degreasing agent with a concentration of 10% for 20 minutes at a temperature of 80°C to remove the oxide film naturally formed on the surface of the aluminum material; Acid luminescence, 10% concentration of luminescence agent (aluminum surface conditioner) is used for luminescence, and it is treated at room temperature for 3 minutes; the surface-conditioned specimen is immersed in 30% sulfuric acid, 5% pyruvic acid, 1.5% aluminum sulfate, and 3% oxalic acid In the solution and the electrolyte solution with the remaining water, the temperature is controlled at 25° C., stirred slightly, and oxidized under the action of alternating current. The frequency of alternating current is 100 Hz, the voltage is 20 volts, and the current density is 2 A / dm2. The oxidation time was 60 minutes. After the oxidation is completed, it is cleaned with pure water, an...

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Abstract

The invention discloses a preparation method for an anode oxidation film of aluminum or aluminum alloy. The objective of the invention is to provide the preparation method for an anode oxidation film of aluminum or aluminum alloy, and the preparation method has high production efficiency and enables an anode oxidation film having good flexibility and deformation performance to be manufactured. According to the invention, a formula for an electrolyte is improved, and the novel formula comprises sulfuric acid, pyruvic acid, aluminum sulfate and an oxalate solution, with the balance being water; therefore, the method can be carried out at a high temperature, thereby saving cost for freezing; furthermore, oxidation time is shortened, thereby enabling high production efficiency to be obtained; the anode oxidation film manufactured in the invention has good flexibility and deformation performance.

Description

technical field [0001] The invention relates to a preparation method of aluminum or aluminum alloy anodic oxidation film. Background technique [0002] The anodic oxide film has much better corrosion resistance than the chemical oxide film, but the anodic oxide film is hard and thick, so it is not suitable when deformation is required. The chemical oxide film has good deformation properties , but its corrosion resistance is far inferior to that of the anodized film. When the environment requires high corrosion resistance, the chemical oxide film cannot meet the requirements. There are few domestic and foreign patent reports on flexible anodic oxide films. Patent CN200610047349.6 reports a flexible anodic oxide film. The effect of flexibility, so that the corrosion resistance cannot be guaranteed and the flexibility is relatively limited. The method of anodic oxidation can obtain good corrosion resistance, but the existing anodic oxidation electrolyte has defects, generally...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/10
Inventor 戴晓兵吕方龙杨彦平
Owner ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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