Inorganic colorful electrolysis coloring technology for aluminium profile anodic oxide film

An anodic oxidation film, electrolytic coloring technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of easy pulverization, etc., achieve the effect of low production cost, fast coloring, and easy popularization and application

Active Publication Date: 2012-01-25
GUANGYA ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a product that achieves good decoration and high weather resistance at the same time on aluminum alloy building profile products, changing the traditional electrolytic coloring that has a single color and organic dyes that are easy to powder. Disadvantages of aluminum profile anodized film inorganic color electrolytic coloring process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The 6063-T5 aluminum alloy test piece (rectangular thin plate with a specification of 200mm×15mm) was routinely degreased, alkali-etched, neutralized and light-emitting, washed in NaOH solution at 60°C, and then heated at a concentration of 190 g / L In the sulfuric acid solution, the temperature is controlled at 18±2°C, the DC voltage is 15 volts, and the current density is 1.3 A / dm 2 , for 25 minutes of anodic oxidation treatment to obtain an oxide film of about 12um, and finally washed with water and set aside.

[0041] Then carry out electrolytic coloring treatment in the electrolytic coloring solution, the composition of the electrolytic coloring bath and the color index after coloring are listed in Table 1. This part of the operation will go through the following four steps, as follows:

[0042] 1. DC segment: Set the power supply voltage to DC output mode, then increase the voltage from 0V to 11V within 0-10 seconds, and then keep the voltage value at 11V for 20 ...

Embodiment 2

[0051] The specific steps are basically the same as in Example 1, except that step 3 is properly adjusted: the holding time at 13V direct current is changed from 60 seconds to 355 seconds. After the above steps, the surface of the workpiece can be dark green, and then the conventional Seal the hole at medium temperature and soak in the sealing solution for 30 minutes. After various tests, it shows that the color reproducibility of the colored oxide film is good, the color difference deviation is small (ΔE≤3.5), and the prepared dark green aluminum alloy profile products have all properties The indicators are all in line with the requirements of the national standard GB5237.2-2008. The 313B fluorescent ultraviolet lamp is used to test the artificial accelerated aging test. After 300 hours of irradiation, the color difference reaches grade 1, and the aging resistance is better than that of spray-coated aluminum profiles.

Embodiment 3

[0053] The specific steps are basically the same as in Example 1, except that step 3 is appropriately modified: the holding time at 13V direct current is changed from 60 seconds to 425 seconds. After the above steps, the surface of the workpiece can be made purple-red, and then the conventional method is used. Seal the hole at medium temperature and soak in the sealing solution for 30 minutes. After various tests, it shows that the color reproducibility of the colored oxide film is good, the color difference deviation is small (ΔE≤3.5), and the prepared purple-red aluminum alloy profile products have all properties The indicators are all in line with the requirements of the national standard GB5237.2-2008. The 313B fluorescent ultraviolet lamp is used to test the artificial accelerated aging test. After 300 hours of irradiation, the color difference reaches grade 1, and the aging resistance is better than that of spray-coated aluminum profiles.

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PUM

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Abstract

The invention discloses an inorganic colorful electrolysis coloring technology for an aluminium profile anodic oxide film, which is characterized by comprising the following working procedures of: removing oil, etching by alkaline, oxidizing an anode, carrying out intermediate treatment and electrolysis coloring, and sealing holes, wherein the intermediate treatment working procedure is set between the working procedures of oxidizing an anode and electrolysis coloring and comprises three steps: a. DC (Direct Current) section: setting a supply voltage into a direct-current output mode, cleaning the micropores of the anodic oxide film, and reducing the thickness of a barrier layer, wherein a voltage value is 8-14V, and time is 20-50 seconds; b. AC (Alternating Current) section: setting the supply voltage into an alternating-current output mode, and generating a second layer of oxide film in the anodic oxide film; c. DC section: switching the supply voltage to the direct-current output mode, generating a third layer of film on the basis of the second layer of oxide film, wherein the voltage value is 10-20V, and operation time is controlled to 60-500s. According to the inorganic colorful electrolysis coloring technology, the existing electrolysis coloring equipment can be utilized to finish the full-color colorful electrolysis coloring aluminium or aluminium alloy in short time, and the inorganic colorful electrolysis coloring technology has the advantages of low production cost and good coloring quality.

Description

technical field [0001] The invention relates to the technical field of aluminum profile building materials, and more specifically relates to a process method for multi-color electrolytic coloring on anodized aluminum alloy products. Background technique [0002] Aluminum alloy is widely used in many fields such as automobiles, aerospace, architectural decoration, home appliances, instruments, computers, mobile phones, daily hardware, etc. It has become the second most used metal structure material after steel. In order to improve the service life of aluminum alloy and meet the requirements of product appearance and decoration, aluminum alloy products can greatly improve their surface hardness and corrosion resistance through anodic oxidation surface treatment. Therefore, anodic oxidation process is widely used. [0003] In order to improve the decorative performance of aluminum alloy products, the aluminum alloy anodized film needs to be colored before sealing. Common color...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/12C25D11/22
Inventor 潘学著陈东初龚循飞吴开锋
Owner GUANGYA ALUMINUM
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