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Anode oxidation and organic-dyeing electrophoresis process of aluminium alloy

Anodizing, aluminum alloy technology, applied in anodizing, electrolytic coating, surface reaction electrolytic coating, etc., to achieve the effect of good quality, low production cost, high acid and alkali resistance

Active Publication Date: 2013-10-16
GUANGDONG YAOYINSHAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some technical difficulties in the current aluminum alloy anodic oxidation electrophoresis process.

Method used

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  • Anode oxidation and organic-dyeing electrophoresis process of aluminium alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Profile surface pre-treatment: Use brightener 90g / L to mix tank (phosphoric acid 50%, hydrofluoric acid 30%, surface active ion (fatty acid polyoxyethylene ether) 5%), etch at room temperature for 3 minutes, then use caustic soda 45g / L to mix The tank was etched for 3 minutes, and then neutralized with 185g / L bath solution for 3 minutes to obtain a bright aluminum alloy active surface superior to traditional pretreatment. The pre-treated aluminum profile is immersed in anodic oxidation, sulfuric acid 180 g / L, temperature: 21 ° C, oxidation time 28 minutes, current density 1.3 A / dm2, and a colorless and transparent anodic oxidation film is obtained.

[0033] After washing with water three times, it enters the dyeing tank, organic purple gold dye is 5g / L, and the dyeing time is 2 minutes under the environment of normal temperature and pH value of 5.5, and the dyed aluminum profile is obtained, which is designated as purple gold 1# color. After washing twice with water, it...

Embodiment 2

[0036] Profile surface pre-treatment: Use brightener 90g / L to mix tank (phosphoric acid 50%, hydrofluoric acid 30%, surface active ion (fatty acid polyoxyethylene ether) 5%), etch at room temperature for 3 minutes, then use caustic soda 45g / L to mix The tank was etched for 3 minutes, and then neutralized with 185g / L bath solution for 3 minutes to obtain a bright aluminum alloy active surface superior to traditional pretreatment. The pre-treated aluminum profile is immersed in anodic oxidation, sulfuric acid 180 g / L, temperature: 21 ° C, oxidation time 28 minutes, current density 1.3 A / dm2, and a colorless and transparent anodic oxidation film is obtained.

[0037] After washing with water three times, enter the dyeing tank, organic rose bengal dye 4g / L, dyeing time is 2 minutes under the environment of normal temperature and pH value of 5.5, and obtain the dyed aluminum profile, which is designated as rose red. After washing twice with water, it enters the sealing tank. The ma...

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Abstract

The invention discloses an anode oxidation and organic-dyeing electrophoresis process of aluminium alloy. The anode oxidation and organic-dyeing electrophoresis process comprises the following steps of: (1) pretreatment of anode oxidation of the aluminium alloy; (2) generation of an oxidation film by anode oxidation; (3) normal-temperature organic dyeing; (4) film hole sealing after dyeing; and (5) electrophoresis and curing. The anode oxidation and organic-dyeing electrophoresis process disclosed by the invention has the advantages that for the aluminium alloy dyed by the process, the color is bright and uniform, the color difference is slight, the glossiness is good, the corrosion resistance and the weather resistance are good, the process has the decorative effect and can be used outdoors or indoors, the selection for color diversification is brought for consumers, the single color for the traditional aluminium-alloy surface treatment is changed, the process is most suitable for the batch production, the process is simple in the production process and the cost is low.

Description

technical field [0001] The invention relates to an aluminum alloy anodic oxidation surface treatment process, in particular to an aluminum alloy anodic oxidation organic dye electrophoresis production process. Background technique [0002] The chemical affinity of aluminum to oxygen is particularly strong, and its surface is always covered by a deadly oxide film in the atmosphere, but the natural aluminum oxide film is extremely thin, has large porosity, low mechanical strength, corrosion resistance and wear resistance Neither can meet the needs of corrosion protection. Using electrochemical methods, a dense high-quality oxide film can be formed on the surface of aluminum (or aluminum alloy), and the film is thicker, and the thickness can reach tens to hundreds of microns, which can effectively improve the corrosion resistance of the rate. In addition, since the formed oxide film has uniform gaps, it can be treated with polar dyeing with organic dyes. After sealing, the col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/14C25D11/18
Inventor 王建兵梁润炳涂利
Owner GUANGDONG YAOYINSHAN ALUMINUM
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