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Method for dyeing anodic oxide layer of aluminum alloy

An anodizing layer, anodizing technology, applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problem of easy color change of dyed aluminum parts, poor weather resistance of dyed aluminum parts, adhesion of vegetable dyes and anodized layers. Problems such as poor focus, to achieve the effect of excellent adhesion, improved adhesion, and improved viscosity

Pending Publication Date: 2022-04-08
惠州市安泰普表面处理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. When the anodized layer of aluminum alloy is dyed, the plant dye is absorbed and enters into the anodized layer of aluminum alloy, but the adhesion between the plant dye and the anodized layer is poor;
[0006] 2. The weather resistance of dyed aluminum parts is poor, which makes the dyed aluminum parts prone to color changes during long-term use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a method for dyeing the anodized layer of an aluminum alloy, comprising the following steps:

[0033] Step 1, degreasing the aluminum alloy, which is a 2024 aluminum alloy square with a size of 15mm×15mm×10mm;

[0034] Step 2, chemically polishing the aluminum alloy;

[0035] Step 3, anodizing the aluminum alloy, the anodizing solution includes 200mL / L of sulfuric acid, soaking the aluminum alloy in the anodizing solution as an anode, at a DC voltage of 12V and a current density of 1.5A / dm 2 , The temperature is 20 ℃ for electrolysis, the electrolysis time is 30min;

[0036] Step 4, use a dye solution to dye the surface of the oxidized aluminum alloy, the dye solution includes 6g / L dark blue, the pH of the dye solution is 5, the temperature of the dye solution is 58°C, and the aluminum alloy is placed in the dye solution The time in is 10min;

[0037] Step five, use the sealing solution to seal the aluminum alloy, the sealing solution include...

Embodiment 2

[0040] The difference between the method for dyeing an anodic oxide layer of an aluminum alloy provided in this example and the method for dyeing an anodic oxide layer of an aluminum alloy provided in Example 1 is that in this embodiment, the dye solution includes 10 g / L rose red.

Embodiment 3

[0042] The difference between the method for dyeing the anodized layer of an aluminum alloy provided in this example and the method for dyeing an anodized layer of an aluminum alloy provided in Example 1 is that in this embodiment, the dye solution includes 12 g / L Autumn fragrance yellow.

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Abstract

The invention relates to a method for dyeing an anodic oxide layer of an aluminum alloy. The method comprises the following steps: step 1, carrying out oil removal treatment on the aluminum alloy; secondly, the aluminum alloy is subjected to chemical polishing; thirdly, the aluminum alloy is subjected to anodic oxidation; fourthly, the surface of the oxidized aluminum alloy is dyed with a dye solution; 5, hole sealing treatment is conducted on the aluminum alloy through a hole sealing solution, the hole sealing solution is prepared from, by mass, 20-30 parts of poly (vinyl alcohol-co-ethylene), 20-30 parts of poly (ethylene-co-1, 2-butylene) glycol, 10-20 parts of acrylic copolymer emulsion RM8, 10-20 parts of sodium carboxymethyl cellulose, 40-50 parts of ethyl alcohol and 800-1000 parts of water, the temperature of the hole sealing solution is 20-40 DEG C, and the hole sealing treatment is conducted on the aluminum alloy through the hole sealing solution. And the aluminum alloy is placed in the hole sealing solution for 1-2 min.

Description

technical field [0001] The invention provides a method for dyeing the anodized layer of an aluminum alloy, specifically, dyeing the surface of the anodized layer of an aluminum alloy to obtain a certain appearance color. Compared with traditional synthetic dyes, the plant used in the invention Dyes are environmentally friendly. Background technique [0002] The existing technical solutions for dyeing the anodized layer of aluminum alloy include electrolytic coloring and chemical solution dyeing. The electrolytic coloring of the anodic oxidation layer of aluminum alloy is mostly carried out by one-step electrolysis or two-step electrolysis, but electrolytic coloring needs to introduce corresponding metal salts, and improper treatment of heavy metal ions will easily pollute the environment, and the surface color of the aluminum alloy after electrolytic coloring treatment is more complex. single. When the anodized layer of aluminum alloy is dyed by chemical solution, syntheti...

Claims

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Application Information

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IPC IPC(8): C25D11/16C25D11/24
Inventor 曾文涛
Owner 惠州市安泰普表面处理科技有限公司
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