Aluminum profile anodizing method

A technology of anodizing and aluminum profiles, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve problems such as low electrolyte temperature, high energy consumption, and poor weather resistance of oxide films, and achieve reasonable process, The effect of strong weather resistance

Inactive Publication Date: 2013-12-18
HENAN HUILONG ALUMINUM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Chinese patent 200610036677.6 discloses a hard oxide film preparation process for aluminum profiles, successfully solving the problems of low electrolyte temperature and high energy consumption
However, the weather resistance of the obtained oxide film is not strong, and customers report that it is easy to darken during use, and occasionally peeling occurs

Method used

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Examples

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Effect test

Embodiment 1

[0010] A method for anodizing an aluminum profile, including degreasing, sandblasting, anodizing, water washing, and drying, characterized in that the current density gradually increases during the anodizing process; the current density increases in this way: the initial current density is 1 ampere / square decimeter, treatment for 3 minutes; then current density 2, treatment for 5 minutes; final current density 3 treatment for 3 minutes; as a preference: the electrolyte contains sulfuric acid 100 g / L, oxalic acid 1 g / L, glycolic acid 1 g / L, glycerol 10 g / L, electrolyte temperature 15°C.

Embodiment 2

[0012] A method for anodizing an aluminum profile, including degreasing, sandblasting, anodizing, water washing, and drying, characterized in that the current density gradually increases during the anodizing process; the current density increases in this way: the initial current density is 1.5 amperes / square decimeter, treatment for 3 minutes; then current density 2.5, treatment for 5 minutes; final current density 3.5 treatment for 3 minutes; as a preference: the electrolyte contains sulfuric acid 200 g / L, oxalic acid 3 g / L, glycolic acid 5 g / L, glycerol 20 g / L, electrolyte temperature 20°C.

Embodiment 3

[0014] A method for anodizing an aluminum profile, including degreasing, sandblasting, anodizing, water washing, and drying, characterized in that the current density gradually increases during the anodizing process; the current density increases in this way: the initial current density is 1 ampere / square decimeter, treatment for 3 minutes; then current density 2, treatment for 5 minutes; final current density 3 treatment for 3 minutes; as preferred: the electrolyte contains sulfuric acid 150 g / L, oxalic acid 2 g / L, glycolic acid 3 g / L, glycerin 15 g / L, electrolyte temperature 15°C.

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Abstract

The invention discloses an aluminum profile anodizing method which comprises steps of oil removal, sand blasting, anodizing, water washing and drying, wherein the current density is increased step by step in the anodizing process. Further, treatment is performed at a current density of 1-1.5 Ampere/square decimeter for 3 minutes; then, treatment is performed at a current density of 2-2.5 Ampere/square decimeter for 5 minutes; and finally, treatment is performed at a current density of 3-3.5 Ampere/square decimeter for 3 minutes. Further, an electrolyte contains 100-200 gram/liter of sulfuric acid, 1-3 gram/liter oxalic acid, 1-5 gram/liter of glycolic acid and 10-20 gram/liter of glycerol; and the temperature of the electrolyte is 15-20 DEG C. Compared with the prior art, the process disclosed by the invention more reasonable; the product obtained through multi-stage anodizing has high weatherability; and customers reflect that no peeling phenomena occur in the use process, and the product is widely accepted on the market.

Description

technical field [0001] The invention relates to an anodic oxidation method of an aluminum profile. Background technique [0002] Chinese patent 200610036677.6 discloses a process for preparing a hard oxide film on an aluminum profile, which successfully solves the problems of low electrolyte temperature and high energy consumption. However, the weather resistance of the obtained oxide film is not strong, and customers report that it is easy to darken during use, and occasionally peels. Contents of the invention [0003] The invention provides a process for preparing a hard oxide film on an aluminum profile. [0004] The technical solution of the present invention is: an aluminum profile anodic oxidation method, including oil removal, sandblasting, anodic oxidation, water washing, drying, and the current density gradually increases during the anodic oxidation process. [0005] Further, the initial current density is 1-1.5 amps / dm2 for 3 minutes; then the current density i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/10
Inventor 田长江
Owner HENAN HUILONG ALUMINUM IND
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