Process for anodizing aluminum-alloy substrate

An aluminum alloy-based, anodic oxidation technology, applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of high production cost and large energy consumption, and achieve low production cost, low energy consumption, and low cost of raw materials The effect of high utilization

Active Publication Date: 2013-07-10
CHENGDU SUNSHINE ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also needs to work under high temperature conditions, which consumes a lot of energy and has high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The anodic oxidation process of aluminum alloy base material, it comprises the following steps:

[0028] S1. Degreasing: Put the aluminum alloy base material in a 13% sulfuric acid tank, degrease, and take it out after 5 minutes;

[0029] S2. The first water washing: wash the aluminum alloy substrate repeatedly with tap water for 4 minutes to ensure that the pH value of the surface of the aluminum alloy substrate is >4;

[0030] S3. Alkali cleaning: Put the aluminum alloy substrate into the concentration of 55kg / m 3 , in a sodium hydroxide solution at a temperature of 40°C, wash with alkali for 8 minutes;

[0031] S4, the second water washing: wash the aluminum alloy substrate repeatedly with tap water, and take it out after rinsing for 2 minutes;

[0032] S5. Lighting: Mechanically polish the aluminum alloy substrate to ensure that the surface of the aluminum alloy substrate is mirror or satin;

[0033] S6. The third water washing: wash the aluminum alloy substrate ...

Embodiment 2

[0041] The anodic oxidation process of aluminum alloy base material, it comprises the following steps:

[0042] S1. Degreasing: Put the aluminum alloy base material in a 14% sulfuric acid tank, degrease, and take it out after 4 minutes;

[0043] S2, the first water washing: wash the aluminum alloy substrate repeatedly with tap water for 3 minutes, and ensure that the pH value of the surface of the aluminum alloy substrate is >4;

[0044] S3. Alkali cleaning: put the aluminum alloy base material into the concentration of 50kg / m 3 , in a sodium hydroxide solution at a temperature of 50°C, wash with alkali for 6 minutes;

[0045] S4, the second water washing: wash the aluminum alloy base material repeatedly with tap water, take it out after rinsing for 3 minutes;

[0046] S5. Lighting: Mechanically polish the aluminum alloy substrate to ensure that the surface of the aluminum alloy substrate is mirror or satin;

[0047] S6. The third water washing: wash the aluminum alloy subs...

Embodiment 3

[0055] The anodic oxidation process of aluminum alloy base material, it comprises the following steps:

[0056] S1. Degreasing: Put the aluminum alloy base material in a 13%-15% sulfuric acid tank, degrease, and take it out after 3 minutes;

[0057] S2. The first water washing: wash the aluminum alloy substrate repeatedly with tap water for 2 minutes to ensure that the pH value of the surface of the aluminum alloy substrate is >4;

[0058] S3. Alkali cleaning: put the aluminum alloy base material into the concentration of 45kg / m 3 , in a sodium hydroxide solution at a temperature of 60°C, wash with alkali for 4 minutes;

[0059] S4, the second water washing: wash the aluminum alloy base material repeatedly with tap water, and take it out after rinsing for 4 minutes;

[0060] S5. Lighting: Mechanically polish the aluminum alloy substrate to ensure that the surface of the aluminum alloy substrate is mirror or satin;

[0061] S6. The third water washing: wash the aluminum allo...

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PUM

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Abstract

The invention relates to a process for anodizing an aluminum-alloy substrate. The process comprises the following steps of: (S1) degreasing; (S2) washing for the first time; (S3) washing by an alkali; (S4) washing for the second time; (S5) polishing; (S6) washing for the third time; (S7) anodizing; (S8) washing for the fourth time; (S9) carrying out electrolytic coloring; (S10) washing for the fifth time; (S11) sealing holes; (S12) washing for the sixth time to finally obtain a dense anodic oxide film. The whole anodizing process is carried out in the environment of normal temperature, less energy is consumed, the sulfuric acid used for anodizing can be reused for degreasing, the utilization rate of raw materials is high, the production cost is low, the holes are sealed after carrying out the anodizing reaction, the anodizing film can effectively protect the aluminum and the aluminum-alloy, the surface of the anodizing film has no honeycomb-like porous structure, is highly smooth and can be kept to be smooth for a long time.

Description

technical field [0001] The invention relates to a metal surface treatment process, in particular to an anodic oxidation process of an aluminum alloy base material. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, especially in the construction industry. Aluminum is a very active metal. Aluminum and aluminum alloys will form a layer of aluminum oxide film in the air, which can protect aluminum and aluminum alloys from further corrosion in neutral or weakly acidic solutions, and play a certain protective role. In order to enhance the protective effect of the film, aluminum surface treatment is an indispensable and very important technical measure. The surface treatment methods for industrial-scale aluminum and aluminum alloys usually include anodic oxidation treatment, chemical conversion treatment, electroplating or electroless plating treatment, surface treatment, etc. Organic coating, etc. One of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/22C25D11/18
Inventor 廖健
Owner CHENGDU SUNSHINE ALUMINUM
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