Aluminum alloy surface treatment method

A technology of aluminum alloy surface and treatment method, which is applied in the direction of metal material coating process, coating, hot-dip plating process, etc., can solve the problems of blistering and discoloration, poor controllability, and difficult production, so as to achieve the goal of not easy leakage Plating, easy mass production, and easy maintenance

Inactive Publication Date: 2010-12-22
BYD CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the existing method of forming texture on the surface of aluminum alloy that are prone to missing plating, blistering and discoloration, difficult to produce or poor in controllability, and to provide a texture that is natural, easy to produce and Aluminum alloy surface treatment method with good controllability

Method used

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  • Aluminum alloy surface treatment method

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment is used to illustrate the aluminum alloy surface treatment method provided by the present invention.

[0034] (1) Pretreatment process

[0035] (1) Anodizing: In 200 g / L sulfuric acid, at 20°C, at 2A / dm 2 The current density of the 3A21 aluminum alloy substrate (dimensions 50 mm × 35 mm × 3 mm) was anodized for 25 minutes.

[0036] (2) Radium engraving: the average output power of the radium engraving is 20W, the engraving line speed is 2000mm / s, and the laser engraving pattern is "ABC".

[0037] (3) Corrosion: At 20° C., the aluminum alloy substrate obtained in step (2) was immersed in the corrosion solution for 2 minutes. Based on 100% by weight of the corrosion solution, the composition of the corrosion solution was: polyoxymethylene 41% by weight, 5% by weight of diethanolamine, 10% by weight of ethylenediaminetetraacetic acid, 5% by weight of diethanolamine laurate, 15% by weight of ethylene glycol monobutyl ether, 10% by weight of sodium dodecylb...

Embodiment 2

[0051] This embodiment is used to illustrate the aluminum alloy surface treatment method provided by the present invention.

[0052] According to the method of Example 1, the 5A05 aluminum alloy substrate (size is 50 mm × 35 mm × 3 mm) is electroplated, the difference is,

[0053] Step (1) is in the sulfuric acid of 120 grams / liter, under 20 ℃, with 2.5A / dm 2 The current density of 3A21 aluminum alloy substrate (dimensions 50 mm × 35 mm × 3 mm) was anodized for 15 minutes.

[0054] Step (3) is: at 20°C, immerse the aluminum alloy stamped part obtained in step (2) in the corrosion solution for 1.5 minutes, based on 100% by weight of the corrosion solution, the composition of the corrosion solution is: polyethylene oxide 41% by weight of alkane, 5% by weight of diethanolamine, 10% by weight of diethanolamine edetate, 5% by weight of diethanolamine stearate, 15% by weight of ethylene glycol monobutyl ether, 10% by weight of sodium dodecylbenzenesulfonate % by weight, 1% by weig...

Embodiment 3

[0058] This embodiment is used to illustrate the aluminum alloy surface treatment method provided by the present invention.

[0059] According to the method of Example 1, the 5A05 aluminum alloy substrate (size is 50 mm × 35 mm × 3 mm) is electroplated, the difference is,

[0060] Step (1) is in the sulfuric acid of 250 grams / liter, under 20 ℃, with 1.5A / dm 2 The current density of the 3A21 aluminum alloy substrate (dimensions 50 mm × 35 mm × 3 mm) was anodized for 35 minutes.

[0061] The obtained aluminum alloy product is denoted as A3.

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Abstract

The invention provides an aluminum alloy surface treatment method which comprises the steps of sequentially carrying out pretreatment, chemical plating and electroplating on an aluminum alloy matrix, wherein the pretreatment comprises the steps of sequentially carrying out anode oxidation, laser etching, erosion and acid etching on the aluminum alloy matrix. By using the method for forming electroplating texture on the surface of an aluminum alloy, the obtained product has natural texture, is not subject to skip plating, bubbling and discoloration phenomena and has a good decorative effect. Besides, the method has the advantage of simple operation, realizes the unshaded treatment and the convenient maintenance by using the technology of anode oxidation plus electroplating, and facilitates the mass production.

Description

technical field [0001] The invention relates to an aluminum alloy surface treatment method. Background technique [0002] Aluminum and its alloys have the advantages of good electrical conductivity, fast heat transfer, light specific gravity, high specific strength, and easy forming, so they have become one of the most widely used metals. At present, they have been put into modern aviation, aerospace, electric power, electronics, petroleum, In the industrial applications of chemical industry, building materials, transportation, light industry and national defense, etc., and are constantly expanding new application fields. [0003] Due to the disadvantages of aluminum and its alloys such as low hardness, non-wear resistance, intergranular corrosion, and difficult welding, which affect its application range and service life; and aluminum is a lively metal, the electrode potential is very negative, and the surface is very easy to form Oxide film, while the naturally generated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C25D11/02C25D11/08C23G1/22C23G1/16C23G1/12C23C2/06C25D3/02C25D5/48
Inventor 赵桂网孙继鹏李爱华
Owner BYD CO LTD
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