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Anodic oxidation surface treatment method for aluminum alloy section bar

An aluminum alloy profile, anodic oxidation technology, applied in the field of aluminum alloy, to achieve the effect of excellent anti-redeposition, good defoaming effect, and excellent durability

Inactive Publication Date: 2016-03-16
ANHUI XIN FA ALUMINUM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of society, people have put forward higher requirements for the performance of aluminum alloys. The performance of aluminum alloys treated by the existing anodic oxidation method still has many shortcomings in terms of corrosion resistance and hardness.

Method used

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Embodiment 1

[0018] The present invention proposes an anodic oxidation surface treatment method for aluminum alloy profiles, comprising: degreasing, alkali etching, neutralization, anodic oxidation and hole sealing;

[0019] During the anodizing process, the anodizing temperature is 19°C, the anodizing time is 35min, the anodizing voltage is 16V, and the current density is 150A / m 2 , the anodized electrolyte is a mixed aqueous solution of sulfuric acid, boric acid and citric acid, wherein, in the mixed aqueous solution of sulfuric acid, boric acid and citric acid, the concentration of sulfuric acid is 50g / L, the concentration of boric acid is 35g / L, and the concentration of citric acid 20g / L.

Embodiment 2

[0021] The present invention proposes an anodic oxidation surface treatment method for aluminum alloy profiles, comprising: degreasing, alkali etching, neutralization, anodic oxidation and hole sealing;

[0022] During the anodizing process, the anodizing temperature is 21°C, the anodizing time is 25min, the anodizing voltage is 18V, and the current density is 130A / m 2 , the anodized electrolyte is a mixed aqueous solution of sulfuric acid, boric acid and citric acid, wherein, in the mixed aqueous solution of sulfuric acid, boric acid and citric acid, the concentration of sulfuric acid is 65g / L, the concentration of boric acid is 20g / L, and the concentration of citric acid It is 35g / L.

Embodiment 3

[0024] The present invention proposes an anodic oxidation surface treatment method for aluminum alloy profiles, comprising: degreasing, alkali etching, neutralization, anodic oxidation and hole sealing;

[0025] During the anodizing process, the anodizing temperature is 20°C, the anodizing time is 30min, the anodizing voltage is 17V, and the current density is 140A / m 2 , the anodized electrolyte is a mixed aqueous solution of sulfuric acid, boric acid and citric acid, wherein, in the mixed aqueous solution of sulfuric acid, boric acid and citric acid, the concentration of sulfuric acid is 60g / L, the concentration of boric acid is 30g / L, and the concentration of citric acid 25g / L;

[0026] In the degreasing process, the raw materials of the degreasing agent used include the following components by weight: 5 parts of coconut oil fatty acid diethanolamide, 3.5 parts of N-oleoyl N-methyl sodium taurate, 10 parts of sodium carbonate, metasilicate 8 parts of sodium, 2.8 parts of so...

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Abstract

The invention discloses an anodic oxidization surface treatment method for an aluminum alloy section bar. The anodic oxidization surface treatment method comprises the following steps: degreasing, alkaline etching, neutralizing, anodic oxidizing and hole sealing, wherein in the anodic oxidizing process, an anodic oxidizing temperature is 19-21 DEG C, the anodic oxidizing process lasts for25-35 minutes, an anodic oxidizing voltage is 16-18V, the current density is 130-150A / m<2>, and an anodic oxidizing electrolyte is a mixed aqueous solution of sulfuric acid with a concentration being 50-65g / L, boric acid with a concentration being 20-35g / L and citric acid with a concentration being 20-35g / L. The anodic oxidation surface treatment method for the aluminum alloy section bar disclosed by the invention is simple in process, and gentle in condition; and an oxidation film ofthe obtained aluminum alloy material is high in hardness and good in corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to an anodic oxidation surface treatment method for aluminum alloy profiles. Background technique [0002] Because aluminum alloy has many excellent physical and chemical properties, it is widely used in various fields of national economy. When the surface of the aluminum alloy is exposed to the atmosphere, it will be covered with a thin layer of natural oxide film, but because the natural oxide film on the surface is easily corroded, the service life of the aluminum alloy material is greatly reduced. Therefore, the industry usually uses anodizing technology to improve various properties of aluminum alloys, such as corrosion resistance and surface mechanical properties. With the development of society, people put forward higher requirements on the performance of aluminum alloys. The performance of aluminum alloys treated by the existing anodic oxidation method still has man...

Claims

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Application Information

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IPC IPC(8): C25D11/08C25D11/10C25D11/16C23G1/24C25D11/18
Inventor 李杰王超孙金东
Owner ANHUI XIN FA ALUMINUM PROD
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