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Preparation technology of aluminum profile hard anodizing film

A technology of hard anodic oxidation and preparation process, which is applied in the direction of anodic oxidation, etc., which can solve the problems of dark color of hard anodized film, high cooling cost, poor decoration effect, etc., and achieve low production cost, save refrigeration cost, and decorate good effect

Inactive Publication Date: 2018-06-12
付豪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Although the hard anodizing of aluminum profiles has become mature after many years of development, the temperature of the electrolyte must be maintained in a low range in the process used all the time, usually -5--5°C. It consumes a large cooling cost, especially in the south for processing and production, the cooling cost remains high, and the obtained hard oxide film is grayish in color and the decorative effect is poor

Method used

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preparation example Construction

[0009] The preparation process of the hard anodic oxidation film of the aluminum profile of the present invention comprises: acid degreasing→alkaline corrosion→light emission→hard anodic oxidation→normal temperature sealing.

[0010] Among them, the main chemical components of the acid degreasing solution are: sulfuric acid 50-100 g / L, OP-10 emulsifier: 5-10 g / L, processing requirements: room temperature, 2-8 minutes.

[0011] The main chemical components of the alkaline corrosion solution are: sodium hydroxide 40-70 g / l, sodium gluconate 5-15 g / l, and the treatment requirements: 50-70°C, 6-15 minutes.

[0012] The main chemical components of the light solution are: nitric acid 150-200 g / l, sulfuric acid 20-50 g / l, treatment requirements: normal temperature, 1-5 minutes.

[0013] The electrolyte solution for hard anodic oxidation contains: sulfuric acid 250-350 g / L, oxalic acid 1-3 g / L, organic conductive agent M10-20 g / L, organic conductive agent N 10-20 g / L, processing requi...

Embodiment 1

[0016] First, the aluminum parts are subjected to acid degreasing, alkaline corrosion, and lightening in sequence, and then the pretreated aluminum parts are washed with water;

[0017] Put it in the pre-configured hard anodized composite electrolyte. The liquid temperature is 17°C, the surface area ratio of hard anodized cathode and anode is 1:1, the cathode is made of aluminum plate, and the current density is 2.8 ampere / square decimeter. The anodizing time is 20-60 minutes, and the hardness of the obtained hard anodized film can reach 400-600HV;

[0018] Finally, seal the group at room temperature.

Embodiment 2

[0020] First, the aluminum parts are subjected to acid degreasing, alkaline corrosion, and lightening in sequence, and then the pretreated aluminum parts are washed with water;

[0021] Put it in the pre-configured hard anodized composite electrolyte, the electrolyte formula is: sulfuric acid 270 g / L, oxalic acid 2.2 g / L, glycolic acid 16 g / L, malonic acid 14 g / L; The liquid temperature is 18°C, the surface area ratio of hard anodized cathode and anode is 2:1, and the current density is 3.1 ampere / square decimeter. The anodizing time is 20-60 minutes, and the hardness of the obtained hard anodized film can reach 400-600HV;

[0022] Finally, it is sealed at room temperature.

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Abstract

The invention discloses a preparation technology of an aluminum profile hard anodizing film. According to the preparation technology, composite electrolyte and a special additive are adopted, a densefilm layer can be formed on the aluminum profile surface at a higher temperature within short time, and the anodizing film with the high hardness is obtained. By means of the preparation technology, limitation of hard anodizing is overcome at the low temperature, the production time is shortened, and the film layer decoration effect is good.

Description

technical field [0001] The invention relates to the field of surface treatment of aluminum profiles, in particular to a preparation process for hard anodized films of aluminum profiles. Background technique [0002] Although the hard anodizing of aluminum profiles has become mature after many years of development, the temperature of the electrolyte must be maintained in a low range in the process used all the time, usually -5--5°C. It consumes a large cooling cost, especially in the south for processing and production, the cooling cost remains high, and the obtained hard oxide film is dark in color and the decorative effect is poor. Contents of the invention [0003] Aiming at the deficiencies of traditional hard anodizing technology, the purpose of this invention is to provide a preparation process for hard anodized film of aluminum profile, which can be electrolyzed at a higher temperature, reduce the cooling cost of oxidation production, and improve the aluminum profile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/10C25D11/16C23G1/12C25D11/24C23F1/36C23F3/03C23F17/00
CPCC25D11/08C23F1/36C23F3/03C23F17/00C23G1/125C25D11/10C25D11/16C25D11/246
Inventor 付豪
Owner 付豪
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