Production technique for carrying out golden and anodization on surface of aluminium alloy

An aluminum alloy surface, anodic oxidation technology, applied in the direction of surface reaction electrolytic coating, electrolytic coating, coating, etc., can solve the problems of unfit for decoration, poor dispersion of dye solution, poor light and weather resistance, etc., to achieve energy saving and light fastness Excellent temperature and low heating temperature

Active Publication Date: 2010-01-06
广东新合铝业新兴有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dyeing golden yellow with organic dyes has the advantages of fast dyeing, fast coloring speed, easy operation, and bright colors. The disadvantage is that it has poor light resistance, heat resistance, and weather resistance, and is not suitable for exterior decoration of buildings.
The golden yellow dyed by inorganic dyes has excellent light resistance and weather resistance, and is suitable for outdoor decoration of building profiles. The disadvantage is that the dyeing solution has poor dispersibility and dark tone.

Method used

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  • Production technique for carrying out golden and anodization on surface of aluminium alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Aluminum surface pre-treatment: Use LW-16 bright cleaning agent (main components are HF and polyhydric alcohol PEG) 40g / L to mix the tank, and etch at room temperature for 5 minutes to obtain a bright aluminum alloy active surface that is superior to traditional pre-treatment. Pre-treated aluminum parts immersed in anodizing: sulfuric acid: 180g / L, AI 3+ : 10g / L, temperature: 21°C. Oxidation time 30 minutes, current density 1.0A / dm 2 , to obtain a colorless, transparent and bright anodized film.

[0035] After three washes, it enters the golden dyeing tank, the concentration of iron oxalate dye is 10g / L, organic functional additives are added according to the ratio, the temperature is 45°C, the pH value is 4.5, and the time is 5 minutes to obtain light golden dyed aluminum parts, which is designated as the No. 1 color .

[0036] After two water washes, it enters a closed tank at room temperature, pH 5.8, and is treated for 10 minutes.

Embodiment 2

[0038] Aluminum surface pre-treatment: use LW-16 bright cleaning agent 40g / L to match the tank, and etch at room temperature for 5 minutes to obtain a bright aluminum alloy active surface that is superior to traditional pre-treatment. The pre-treated aluminum parts are immersed in anodizing: sulfuric acid: 180g / L, AI 3+ : 10g / L, temperature: 21°C. Oxidation time 30 minutes, current density 1.0A / dm 2 , to obtain a colorless, transparent and bright anodized film.

[0039] After three washes, it enters the golden dyeing tank, the concentration of iron oxalate dye is 20g / L, organic functional additives are added according to the ratio, the temperature is 45°C, the pH value is 4.5, and the time is 5 minutes to obtain a deep golden dyed aluminum piece, which is designated as No. 2 color.

[0040] After two water washes, it enters a closed tank at room temperature, pH 5.8, and is treated for 10 minutes.

Embodiment 3

[0042] Aluminum surface pre-treatment: use LW-16 bright cleaning agent 40g / L to match the tank, and etch at room temperature for 5 minutes to obtain a bright aluminum alloy active surface that is superior to traditional pre-treatment. The pre-treated aluminum parts are immersed in anodizing: sulfuric acid: 180g / L, AI 3+ : 10g / L, temperature: 21°C. Oxidation time 30 minutes, current density 1.0A / dm 2 , to obtain a colorless, transparent and bright anodized film.

[0043] After three washes, it enters the golden dyeing tank, the concentration of iron oxalate dye is 30g / L, organic functional additives are added according to the ratio, the temperature is 45°C, the pH value is 4.5, and the time is 5 minutes to obtain a very deep golden dyed aluminum piece, which is designated as No. 3 color.

[0044] After two water washes, it enters a closed tank at room temperature, pH 5.8, and is treated for 10 minutes.

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Abstract

The invention relates to a production technique for carrying out golden and anodization on the surface of aluminium alloy. The production technique comprises the following steps of: carrying out decontamination and oil removal treatment for 3 to 5 minutes on hung aluminium alloy sections in bath liquid of a bright cleaning bath, washing for 2 to 3 times after finishing treatment, and then entering next procedure; carrying out anodization treatment on the sections treated by the former procedure in an anodizing bath, washing for 2 to 3 times and washing with pure water for 1 time after finishing treatment, and then entering next procedure; putting the anodized sections into a golden dyeing bath for dyeing, washing for 2 to 3 times after finishing treatment, and then entering next procedure; and finally closing the dyed sections in a closing bath with medium temperature or normal temperature, washing for 1 time after finishing treatment, and then entering next procedure, namely unloading and packaging. The production technique firstly discloses an improved method for introducing the bright cleaning bath in the pretreatment process and adding an additive with organic function in inorganic dye of the dyeing bath, and leads the technique to have the advantages of an organic dye material dyeing method and an inorganic dye material dyeing method simultaneously.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy surface treatment, in particular to a production process for performing golden yellow and anodic oxidation on the surface of aluminum alloy. Background technique [0002] For many years, various coloring processes have been used in the field of color finishing of anodized aluminum. The main coloring processes used in industrial production are as follows: [0003] Bulk coloring, electrolytic coloring, interference coloring, dye dyeing, however some of these coloring processes are no longer used for cost and ecological reasons. Due to the characteristics of high porosity, strong adsorption capacity and easy dyeing of anodized film, various dyeing methods have emerged as the times require. Among the many dyeing methods, because golden dyeing gives aluminum alloys a golden appearance and meets the aesthetic requirements of people in modern society, golden dyeing is the most common application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/14
Inventor 李其真曹贵水夏良文黄大胜
Owner 广东新合铝业新兴有限公司
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