Aluminum alloy with army-green micro-arc oxidation ceramic membrane on surface and preparation method of aluminum alloy

A micro-arc oxidation and aluminum alloy technology, applied in the direction of anodization, can solve the problems of black spots on the green ceramic film substrate, light color of the green ceramic film, and light green surface on the surface, etc., and achieves low cost, not easy to fade, and less environmental pollution. Effect

Inactive Publication Date: 2013-04-03
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current aluminum alloy micro-arc oxidation ceramic film is mostly white or gray, and the color is single.
At present, there are many studies on the preparation of green ceramic membranes. The shortcomings are: (1) The solution contains strong corrosive substances. Preparation method of magnesium alloy micro-arc oxidation green ceramic film, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences); (2) The color of the green ceramic film is too light; such as Geely University in Na 2 SiO 3 , NaoH, EDTA-Na 2 、K 2 Cr 2 o 7 The green ceramic film was obtained by treatin

Method used

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  • Aluminum alloy with army-green micro-arc oxidation ceramic membrane on surface and preparation method of aluminum alloy
  • Aluminum alloy with army-green micro-arc oxidation ceramic membrane on surface and preparation method of aluminum alloy
  • Aluminum alloy with army-green micro-arc oxidation ceramic membrane on surface and preparation method of aluminum alloy

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Embodiment 1

[0022] refer to figure 1 , the present invention is an aluminum alloy with a military green micro-arc oxidation ceramic film on the surface, which is composed of an aluminum alloy substrate 1 and a military green ceramic film 2 coated on the surface of the aluminum alloy substrate 1 .

[0023] Aluminum alloy substrate: 6061 aluminum alloy, size: 30mm×20mm×3mm.

[0024] The preparation method of the present invention is:

[0025] (1) Inject the alkaline electrolyte mixed according to the specific composition and concentration into the PVC plastic tank, stir evenly at 10~20°C, and use it after standing for 1~2 hours;

[0026] The weight of each component of the alkaline electrolyte and the total volume ratio of the electrolyte are: sodium phosphate 25g / L, sodium hexametaphosphate 15g / L, sodium hydroxide 4g / L, disodium edetate 3g / L, Potassium dichromate 3g / L, sodium carbonate 4g / L, sodium lauryl sulfate 2g / L, hydrogen peroxide 2g / L, pH value 12-14;

[0027] (2) Use 400#, 600#,...

Embodiment 2

[0032] Preparation of an aluminum alloy with a military green micro-arc oxidation ceramic film on the surface, the aluminum alloy substrate: 6061 aluminum alloy, size: 30mm×20mm×3mm.

[0033] The weight of each component of the alkaline electrolyte and the total volume ratio of the electrolyte are: sodium phosphate 30g / L, sodium silicate 30g / L, sodium hexametaphosphate 20g / L, sodium hydroxide 3g / L, ethylenediaminetetra Disodium acetate 4g / L, potassium dichromate 3.5g / L, sodium carbonate 4g / L, sodium lauryl sulfate 3g / L, hydrogen peroxide 2g / L; micro-arc oxidation time is 20min, current density is 10 A / dm 2 , the rest of the preparation method is the same as in Example 1, the thickness of the prepared ceramic film is 20.2 μm, and the microhardness is 1700HV.

Embodiment 3

[0035] Preparation of an aluminum alloy with a military green micro-arc oxidation ceramic film on the surface, the aluminum alloy substrate: 6061 aluminum alloy, size: 20mm×15mm×1mm.

[0036] The ratio of the weight of each component of the alkaline electrolyte to the total volume of the electrolyte is: sodium silicate 40g / L, sodium hexametaphosphate 18g / L, sodium hydroxide 4g / L, disodium edetate 2g / L , potassium dichromate 4g / L, sodium carbonate 10g / L, sodium lauryl sulfate 5g / L, hydrogen peroxide 2g / L; the micro-arc oxidation time is 45min, and the current density is 10 A / dm 2 , the rest of the preparation method is the same as in Example 1, the thickness of the prepared ceramic film is 21.4 μm, and the microhardness is 1700HV.

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Abstract

The invention discloses an aluminum alloy with an army-green micro-arc oxidation ceramic membrane on the surface, and a preparation method of the aluminum alloy. The aluminum alloy and the preparation method mainly solve the technical problem that most of the ceramic membranes treated by a light metal micro-arc oxidation technology existing in the prior art are off-white, white, black and the like. An electrolytic solution of the aluminum alloy comprises the following solutes: sodium phosphate, sodium silicate, sodium hexametaphosphate, sodium hydroxide, ethylene diamine tetraacetic acid, potassium dichromate, sodium carbonate, lauryl sodium sulfate and hydrogen peroxide; deionized water is adopted as a solvent; and the solutes and the solvent are blended into an alkaline electrolytic solution, stirred, placed for 1-2 hours, and then subjected to micro-arc oxidation treatment, therefore, the army-green ceramic membrane is obtained. The aluminum alloy has the benefits that the aluminum alloy is simple in preparation method, low in cost and small in environmental pollution. The prepared army-green ceramic membrane has the advantages that the army-green ceramic membrane is high in wear resistance, good in corrosion resistance, uniform in color and luster, good in stability, and compact, and does not fade easily. The army-green ceramic membrane is particularly suitable for disguise requirements of army products.

Description

technical field [0001] The invention relates to the technical field of light metal surface treatment, in particular to an aluminum alloy with a military green micro-arc oxidation ceramic film on the surface and a preparation method thereof. Background technique [0002] Aluminum alloy is well known for its light weight, high specific strength, high electrical conductivity, and good heat transfer, and has been widely used in the fields of machinery, electronics, aerospace, and aviation. However, due to its low hardness, poor corrosion resistance, and Low abrasiveness limits it. Therefore, improving the surface hardness, corrosion resistance, wear resistance and decorative properties of aluminum alloys has become a key issue in the development of aluminum alloys. [0003] Micro-arc oxidation technology, also known as plasma micro-arc oxidation, is obtained by increasing the applied voltage on the basis of ordinary anodizing technology. The applied voltage of ordinary anodizi...

Claims

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Application Information

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IPC IPC(8): C25D11/06
Inventor 徐晋勇石小超付国华高成唐焱罗奕张斌赵龙阳陈金龙蒋占四高波王贵
Owner GUILIN UNIV OF ELECTRONIC TECH
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