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

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...

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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 treating it in the electrolyte for 16 minutes (Li Jiaqing, Research on the Preparation Technology of Micro-arc Oxidation Ceramic Films of Different Colors on the Surface of Aluminum Alloy, Master's Degree Thesis of Jilin University in 2009); (3) The produced green ceramic film has black spots on the base And the surface green is very light, such as Lanzhou University of Technology with NaAlO 2 、K 2 Cr 2 o 7 , a small amount of NaOH and H 2 o 2 Preparation of green ceramic film on the surface of magnesium alloy (Yan Fengyun, Preparation of green ceramic film by micro-arc oxidation of magnesium alloy)

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