Biological treatment oxidation process for aluminum substrate

An oxidation process and biological treatment technology, applied in the coating process of metal materials, etc., can solve the problems of poor oxidation process on the surface of aluminum substrates, etc., and achieve the effect of bright colors, good adhesion and good corrosion resistance

Inactive Publication Date: 2018-03-27
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, and the surface of the aluminum substrate is subjected to degreasing treatment and water washing; 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), the oxidation treatment of the aluminum substrate, the pretreated aluminum substrate is subjected to biological bacterial treatment and oxidation to form an aluminum oxide dense film;

[0035] In the oxidation treatment, the aluminum substrate is immersed in an aqueous liquid containing acidophilic bacteria, the addition amount of acidophilic bacteria 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 of the aluminum substrate, washing the oxidized aluminum substrate wit...

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 potassium hydroxide solution.

[0041] Step 2), the oxidation treatment of the aluminum substrate, the pretreated aluminum substrate is subjected to biological bacterial treatment and oxidation to form an aluminum oxide dense film;

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

[0043] Air was introduced into the impregnating liquid during the oxidation treatment process, and the amount of ...

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, the spherical glass balls are sprayed to the surface of the aluminum substrate to remove oil spots, the spray distance is controlled to be 300mm, the spray angle is 50 degrees, and the spray pressure is 3kg / mm 2 .

[0049] Step 2), the oxidation treatment of the aluminum substrate, the pretreated aluminum substrate is subjected to biological bacterial treatment and oxidation to form an aluminum oxide dense film;

[0050] In the oxidation treatment, the aluminum substrate is immersed 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 h. During the oxidation treatme...

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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 aluminum surface needs to be oxidized to form an aluminum oxide oxide layer. Aluminum alloy surface treatment usually adopts anodizing, chemical conversion treatment, electroplating and micro-arc oxidation. 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 corrosion resistance is lower than that of anodic oxide film, so it should not be used alone; but it has certain corrosion resistance and good physical adsorption. Ability, is a good primer for painting. [0003] CN1039626A discloses a chemical oxidation method of aluminum and alloys, a. The chemical oxidation solution is composed of 3.7-6.7 g / L chromic anhydride, 1-3 g / L fluoride, 0.5-0.05 g / L potassium ferricyanide, surface active Agent 0.5-3 g / ...

Claims

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Application Information

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Patent Type & Authority Applications(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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