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Hard anodizing coloring method of aluminum alloy surface

A hard anodic oxidation and aluminum alloy surface technology, which is applied in the coloring of aluminum alloys and hard anodic oxidation coloring of aluminum alloy surfaces, can solve the problems of poor coloring effect, complicated process, single surface color, etc., and achieve good results. Coloring effect, rich color, good color effect

Active Publication Date: 2012-12-19
ZHEJIANG SUPOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the defect that the surface color of the existing common anodic oxidation film is single, and can obtain colorful film colors, but because it needs to adopt double-layer anodic oxidation treatment, the process is complicated, and it adopts electrolytic coloring method, coloring The effect is not good, and the temperature resistance is relatively poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Select the aluminum alloy substrate, first wash off the dirt on the surface of the aluminum alloy substrate, and then use dilute sulfuric acid with a mass concentration of 5% to clean the surface of the aluminum alloy substrate to remove impurities such as corrosion layers and oil stains on the surface, and then After washing with a sodium carbonate solution with a mass concentration of 20%, the acid and alkali solution remaining on the surface of the aluminum alloy substrate is finally washed with water until the washing liquid is neutral, and then dried in an oven.

[0038] Perform hard anodizing treatment on the cleaned aluminum alloy base material at a temperature of 4°C to 13°C. Forming a hard anodized film, the thickness of the hard anodized film is greater than 25 microns, preferably, the thickness of the hard anodized film is 30 microns to 250 microns;

[0039] In the presence of ferric oxalate, put the aluminum alloy after the hard anodic oxidation treatment in...

Embodiment 2

[0041] Select the 3003 aluminum alloy substrate, first wash off the dirt on the surface of the 3003 aluminum alloy substrate, and then use dilute sulfuric acid with a mass concentration of 3% to clean the surface of the 3003 aluminum alloy substrate to remove the corrosion layer and oil stains on the surface , and then wash it with a sodium carbonate solution with a mass concentration of 25%, and finally wash the acid and alkali solution remaining on the surface of the aluminum alloy substrate with water. After washing until the washing solution is neutral, put it in an oven and dry it.

[0042] The cleaned aluminum alloy base material is subjected to hard anodic oxidation treatment in an acidic electrolyte at a temperature of 4°C to 13°C. Other process parameters of hard anodic oxidation treatment can be conventionally selected in the field. A hard anodized film is formed on the surface of the aluminum alloy, and the thickness of the hard anodized film is 25 microns;

[0043]...

Embodiment 3

[0045] Select the aluminum alloy substrate, first wash off the dirt on the surface of the aluminum alloy substrate, and then use dilute sulfuric acid with a mass concentration of 3% to clean the surface of the aluminum alloy substrate to remove impurities such as corrosion layers and oil stains on the surface, and then After washing with a sodium carbonate solution with a mass concentration of 25%, the acid-base solution remaining on the surface of the aluminum alloy substrate is finally washed with water until the washing solution is neutral, and then dried in an oven.

[0046] Perform hard anodic oxidation treatment on the cleaned aluminum alloy substrate at a temperature of 4°C to 13°C to form a hard anodized film on the surface of the aluminum alloy. The thickness of the hard anodized film is 30 microns;

[0047] In the presence of ferric oxalate, put the aluminum alloy after the hard anodic oxidation treatment into the ferric oxalate solution for coloring treatment, and t...

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Abstract

The invention relates to a hard anodizing coloring method of the aluminum alloy surface, belonging to the technical field of aluminum alloy surface treatment and aiming to solve the technical problems in the prior art that the process for treating the aluminum alloy surface has complicated steps and the treated aluminum alloy surface has a single color. The hard anodizing coloring method of the aluminum alloy surface comprises the following steps: a, hard anodizing: subjecting an cleaned aluminum alloy substrate to hard anodizing at 4-13 DEG C so that the a hard anodized film is formed on the aluminum alloy surface; and b, coloring: coloring the aluminum alloy under the condition of the existence of iron oxalate, and sealing to obtained the colored aluminum alloy. The hard anodizing coloring method of the aluminum alloy surface further comprises the step of treating the aluminum alloy at the high temperature of 380-450 DEG C. The hard anodizing coloring method of the aluminum alloy surface has a short technical process and a good coloring effect and ensures that the anodized film is not easy to fall and is colorful. The aluminum alloy surface has the high hardness value (HV) 0.05 of more than 400.

Description

technical field [0001] The invention relates to a coloring method for aluminum alloys, in particular to a hard anodic oxidation coloring method for the surface of aluminum alloys, and belongs to the technical field of aluminum alloy surface treatment. Background technique [0002] Hard anodizing technology is the most excellent technology among all aluminum alloy surface treatment technologies. It has significant advantages such as high film thickness, high hardness and high wear resistance, and has been widely used in the surface treatment of aluminum alloys. Hard anodic oxidation treatment generally includes sulfuric acid hard anodic oxidation direct current method, oxalic acid hard anodic oxidation direct current gravity separation method, and the sulfuric acid hard anodic oxidation direct current method is currently a widely used hard anodic oxidation method. However, due to the common hard anodic oxidation treatment process, the electrolytic treatment process is general...

Claims

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Application Information

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IPC IPC(8): C25D11/06C25D11/18
Inventor 徐存荣金伟平王小良
Owner ZHEJIANG SUPOR CO LTD
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