Preparation method for low-voltage micro-arc oxidation ceramic film on aluminum alloy surface

A technology of aluminum alloy surface, micro-arc oxidation, applied in anodizing and other directions, can solve the problems of high cost, restrict development, large energy consumption, etc., and achieve the effect of short processing time, improve production efficiency, and reduce equipment power

Inactive Publication Date: 2019-01-11
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the micro-arc oxidation technology has not been widely used in industrial production, and the following problems restrict its development. The energy consumption in the micro-arc oxidation process is high and th...

Method used

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  • Preparation method for low-voltage micro-arc oxidation ceramic film on aluminum alloy surface

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. The raw material is uniformly made of 2024 aluminum alloy plate, which is cut into a square sample of 30 mm × 30 mm, and a small hole is punched on the edge of the sample for the connection of the wire and the sample.

[0022] 2. The pretreatment process of the sample before micro-arc oxidation is as follows:

[0023] Grind it step by step with water-based sandpaper to 1500#, polish it, put it into an ultrasonic vibration cleaner, clean it with deionized water and absolute ethanol, and dry it with a hair dryer.

[0024] 3. The electrolyte adopts silicate system, adding Na 2 SiO 3 8 g / L, H 3 BO 3 2.5 g / L, NaOH 0.75 g / L configuration solution. Add 0.1 g / L sodium dodecylsulfonate as a surfactant in the above electrolytic solution.

[0025] 4. Using self-made adjustable AC power supply, the micro-arc oxidation of 2024 aluminum alloy plate is carried out in a constant current mode. In the constant voltage mode, the initial voltage is 0V, the final voltage is 150V, a...

Embodiment 2

[0028] 1. The raw material is uniformly made of 2024 aluminum alloy plate, which is cut into a square sample of 30 mm × 30 mm, and a small hole is punched on the edge of the sample for the connection of the wire and the sample.

[0029] 2. The pretreatment process of the sample before micro-arc oxidation is as follows:

[0030] Grind it step by step with water-based sandpaper to 1500#, polish it, put it into an ultrasonic vibration cleaner, clean it with deionized water and absolute ethanol, and dry it with a hair dryer.

[0031] 3. The electrolyte adopts silicate system, adding Na 2 SiO 3 8 g / L, H 3 BO 3 2.5 g / L, NaOH 0.75 g / L configuration solution. Add 0.1 g / L sodium dodecylsulfonate as a surfactant in the above electrolytic solution. .

[0032] 4. Using self-made adjustable AC power supply, the micro-arc oxidation of 2024 aluminum alloy plate is carried out in a constant voltage mode. In constant voltage mode, the initial voltage is 0V, the final voltage is 180V, an...

Embodiment 3

[0034] 1. The raw material is uniformly made of 2024 aluminum alloy plate, which is cut into a square sample of 30 mm × 30 mm, and a small hole is punched on the edge of the sample for the connection of the wire and the sample.

[0035] 2. The pretreatment process of the sample before micro-arc oxidation is as follows:

[0036] Grind it step by step with water-based sandpaper to 1500#, polish it, put it into an ultrasonic vibration cleaner, clean it with deionized water and absolute ethanol, and dry it with a hair dryer.

[0037] 3. The electrolyte adopts silicate system, adding Na 2 SiO 3 10 g / L, H 3 BO 3 2 g / L, NaOH 1 g / L configuration solution. Add 0.1 g / L of sodium citrate as a surfactant to the above solution.

[0038] 4. Using self-made adjustable AC power supply, the micro-arc oxidation of 2024 aluminum alloy plate is carried out in a constant voltage mode. In the constant voltage mode, the initial voltage is 0V, the final voltage is 200V, and the oxidation time i...

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Abstract

The invention provides a preparation method for a low-voltage micro-arc oxidation ceramic film on the aluminum alloy surface and relates to an aluminum alloy surface treatment method. The preparationmethod comprises the steps that adopted electrolyte belongs to a silicate system, and Na2SiO3, H3BO3 and NaOH are added to prepare a solution; glycerinum, sodium diethyl dithiocarbamate, sodium citrate and sodium dodecyl sulfate are selected as surface active agents correspondingly; and an adjustable alternating current power source is adopted to prepare the micro-arc oxidation ceramic film for a2024 aluminum alloy plate material. According to the preparation method for the low-voltage micro-arc oxidation ceramic film on the aluminum alloy surface, a micro-arc oxidation process of low voltageand the weak alkaline electrolyte is adopted, and green production and zero discharge of waste water, waste gas and waste residue are realized; the electrolyte can be recycled through reasonable andscientific proportion again after being used for many times; and the preparation method for the low-voltage micro-arc oxidation ceramic film on the aluminum alloy surface has the characteristics of being low in voltage, energy consumption and treatment cost, high in efficiency and environment protection and capable of performing cyclic utilization, and no damage is generated to the surfaces of base materials.

Description

technical field [0001] The invention relates to a method for treating the surface of an aluminum alloy, in particular to a method for preparing a low-pressure micro-arc oxidation ceramic film on the surface of an aluminum alloy. Background technique [0002] The demand for the use of energy resources in the world is expanding day by day. Faced with the shortage of energy resources, various countries have adopted various countermeasures, such as energy conservation and environmental protection, seeking new energy sources, etc. The use of light metals is of great significance for reducing weight and consumption. Light metals such as aluminum and magnesium The scope of use of its alloys continues to expand. [0003] Aluminum alloy has excellent properties such as light weight, high specific strength and good thermal conductivity, which makes it the second largest metal material in use after steel. Aluminum alloys are used more and more widely, such as aerospace, Transportation...

Claims

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Application Information

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IPC IPC(8): C25D11/08
CPCC25D11/026C25D11/08
Inventor 马国峰张鸿龄贺春林
Owner SHENYANG UNIV
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