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A kind of aluminum substrate surface biological treatment oxidation process

An oxidation process and biological treatment technology, which is applied in the coating process of metal materials, etc., can solve the problems of poor oxidation process effect on the surface of aluminum substrates, etc., and achieve the effect of bright colors, convenient purchase, and bright film surface

Inactive Publication Date: 2018-11-27
乾乐欣展新材料技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the problem that the existing aluminum substrate surface oxidation process is not effective, and provides a biological treatment oxidation process for the aluminum substrate surface, which has simple process, low cost and no chemical pollution problem, and the aluminum oxide film on the surface of the aluminum substrate has better binding force

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A biological treatment and oxidation process for the surface of an aluminum substrate, comprising:

[0033] Step 1), the aluminum substrate is pretreated, the surface of the aluminum substrate is degreased and washed with water; the degreasing treatment is treated with an alkaline degreasing solution at room temperature for 2 hours, and the alkaline degreasing solution is a sodium hydroxide solution.

[0034] Step 2), oxidation treatment of the aluminum substrate, oxidizing the pretreated aluminum substrate with biological bacteria to form a dense aluminum oxide film;

[0035] The oxidation treatment involves immersing the aluminum substrate in an aqueous liquid containing acidophilic bacteria, the amount of acidophilic bacteria added is 50 g / L, the pH of the aqueous liquid is 2, and the immersion time is 40 h.

[0036] Step 3), cleaning and drying the aluminum substrate, washing and drying the oxidized aluminum substrate, the drying temperature is 50°C.

Embodiment 2

[0038] A biological treatment and oxidation process for the surface of an aluminum substrate, comprising:

[0039] Step 1), pretreatment of the aluminum substrate, degreasing the surface of the aluminum substrate, and washing with water;

[0040] The degreasing treatment is to treat with an alkaline degreasing solution at room temperature for 2 hours, and the alkaline degreasing solution is a potassium hydroxide solution.

[0041] Step 2), oxidation treatment of the aluminum substrate, oxidizing the pretreated aluminum substrate with biological bacteria to form a dense aluminum oxide film;

[0042] The oxidation treatment involves immersing the aluminum substrate in an aqueous liquid containing acidophilic bacteria, the amount of acidophilic bacteria added is 500 g / L, the pH of the aqueous liquid is 4, and the immersion time is 10 h.

[0043] Air is introduced into the impregnating liquid during the oxidation treatment process, and the rate of introduction of air is 3 L / h.

...

Embodiment 3

[0046] A biological treatment and oxidation process for the surface of an aluminum substrate, comprising:

[0047] Step 1), pretreatment of the aluminum substrate, degreasing the surface of the aluminum substrate, and washing with water;

[0048] The degreasing treatment is glass ball shot peening, spraying spherical glass pellets onto the surface of the aluminum substrate to remove oil spots, controlling the spraying distance to 300 mm, the spraying angle to 50 degrees, and the spraying pressure to 3 kg / mm 2 .

[0049] Step 2), oxidation treatment of the aluminum substrate, oxidizing the pretreated aluminum substrate with biological bacteria to form a dense aluminum oxide film;

[0050] The oxidation treatment involves immersing the aluminum substrate in an aqueous liquid containing acidophilic bacteria, the amount of acidophilic bacteria added is 300 g / L, the pH of the aqueous liquid is 2, and the immersion time is 8 hours. During the oxidation treatment, air is introduced...

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Abstract

The invention relates to a method using biological oxidation. An aluminum substrate is treated through acidophilic bacteria in an acid environment and is washed with circulation water, so that a compact alumina film is formed on the aluminum substrate. High-pollution and high-energy-consumption inorganic chemical oxidation and electro-oxidation are avoided, a compact aluminum oxide layer is formedon the surface of the aluminum substrate, higher insulation and heat conduction properties are achieved, the compact oxide layer has the characteristics of uniformity, stability and consistency, theheat conduction and insulation properties of an aluminum-based copper clad plate are greatly improved, and industrial pollution and energy loss are not generated.

Description

technical field [0001] The invention relates to a surface treatment method of an aluminum plate. Background technique [0002] In the production process of the aluminum substrate, the surface of the aluminum needs to be oxidized to form an oxide layer of aluminum oxide. Aluminum alloy surface treatment usually adopts anodic oxidation, chemical conversion treatment, electroplating and micro-arc oxidation, etc. The oxide film obtained by chemical oxidation of aluminum and aluminum alloy parts has a thickness of about 0.5-4 μm, poor wear resistance, and lower corrosion resistance than anodic oxide film, so it is not suitable for use alone; but it has certain corrosion resistance and good physical adsorption Ability, is a good base layer for painting. [0003] CN1039626A discloses a kind of aluminum and alloy chemical oxidation method, a, chemical oxidation solution is by the chromic anhydride of 3.7-6.7 gram / liter, 1-3 gram / liter fluoride, 0.5-0.05 gram / liter potassium ferric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/56
CPCC23C22/56
Inventor 李长岭张剑
Owner 乾乐欣展新材料技术(上海)有限公司
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