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Surface treatment method of magnesium aluminum alloy

A magnesium-aluminum alloy, surface treatment technology, applied in anodizing and other directions, can solve the problems of insufficient wear resistance and corrosion resistance of the oxide film, wear and tear, poor wear resistance, etc. Easy to use effect

Inactive Publication Date: 2014-03-12
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, magnesium-aluminum alloy materials have low hardness and poor wear resistance, and frequent abrasion and damage. Therefore, before use, magnesium-aluminum alloys often need to undergo corresponding surface treatment to meet their environmental adaptability and safety, reduce abrasion, and prolong their durability. service life
[0003] Since the surface of magnesium-aluminum alloy is easy to form an oxide film, it is very stable in the atmosphere, but the wear resistance and corrosion resistance of the naturally formed oxide film are not strong enough, so artificial methods are used for anodic oxidation treatment.

Method used

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  • Surface treatment method of magnesium aluminum alloy
  • Surface treatment method of magnesium aluminum alloy
  • Surface treatment method of magnesium aluminum alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0074] A surface treatment method for magnesium-aluminum alloys, comprising the steps of:

[0075] (1) Use sandpaper to remove the naturally formed oxide film on the surface of the magnesium-aluminum alloy sheet (thickness 1.5mm) and make it smooth;

[0076] (2) Put the polished magnesium-aluminum alloy sheet into a degreasing solution at a temperature of 70°C for 5 minutes, and the degreasing solution is composed of Na 2 CO 3 solution, Na 3 PO 4 solution and Na 2 SiO 4 The solution is configured with a volume ratio of 1:1:1, and the Na 2 CO 3 The concentration of the solution is 40g / L, the Na 3 PO 4 The concentration of the solution is 40g / L, the Na 2 SiO 4 The concentration of the solution is 20g / L;

[0077] (3) Put the degreased magnesium-aluminum alloy sheet into an alkaline etching solution at a temperature of 60° C. for 4 minutes, and the alkaline etching solution is a NaOH solution with a concentration of 20 g / L;

[0078] (4) Put the alkali-etched magnesium-...

Embodiment 2

[0084] A surface treatment method for magnesium-aluminum alloys, comprising the steps of:

[0085] (1) Use sandpaper to remove the naturally formed oxide film on the surface of the magnesium-aluminum alloy sheet (thickness 1.5mm) and make it smooth;

[0086] (2) Put the polished magnesium-aluminum alloy sheet into a degreasing solution at a temperature of 75°C for 4 minutes, and the degreasing solution is composed of Na 2 CO 3 solution, Na 3 PO 4 solution and Na 2 SiO 4 The solution is configured with a volume ratio of 1:1:1, and the Na 2 CO 3 The concentration of the solution is 40g / L, the Na 3 PO 4 The concentration of the solution is 40g / L, the Na 2 SiO 4 The concentration of the solution is 20g / L;

[0087] (3) Put the degreased magnesium-aluminum alloy sheet into an alkaline etching solution at a temperature of 70° C. for 3 minutes, and the alkaline etching solution is a NaOH solution with a concentration of 20 g / L;

[0088] (4) Put the alkali-etched magnesium-...

Embodiment 3

[0094] A surface treatment method for magnesium-aluminum alloys, comprising the steps of:

[0095] (1) Use sandpaper to remove the naturally formed oxide film on the surface of the magnesium-aluminum alloy sheet and make it smooth;

[0096] (2) Put the polished magnesium-aluminum alloy sheet into a degreasing solution at a temperature of 72°C for 3 minutes, and the degreasing solution is composed of Na 2 CO 3 solution, Na 3 PO 4 solution and Na 2 SiO 4 The solution is configured with a volume ratio of 1:1:1, and the Na 2 CO 3 The concentration of the solution is 40g / L, the Na 3 PO 4 The concentration of the solution is 40g / L, the Na 2 SiO 4 The concentration of the solution is 20g / L;

[0097] (3) Put the degreased magnesium-aluminum alloy sheet into an alkaline etching solution at a temperature of 50° C. for 5 minutes, and the alkaline etching solution is a NaOH solution with a concentration of 20 g / L;

[0098] (4) Put the alkali-etched magnesium-aluminum alloy she...

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Abstract

The invention relates to surface treatment of alloy materials and in particular to a surface treatment method of magnesium aluminum alloy. The experimental process comprises the following steps: polishing, degreasing, performing alkaline corrosion, performing chemical polishing, performing anodic oxidation, performing electrolytic coloring, and performing hole sealing. According to the surface treatment method, the design is reasonable, and a thick and dense oxide film layer is formed on the surface of the magnesium aluminum alloy by an anodic oxidation method, so that the corrosion resistance of the magnesium aluminum alloy is remarkably changed and the hardness, the wear resistance and the decorative performance of the magnesium aluminum alloy are improved; however, the anodic oxide film of the magnesium aluminum alloy is very high in porosity rate and adsorption capacity, can be easily polluted and corroded by a corrosive medium, and has to be subjected to hole sealing so as to improve the corrosion resistance and the pollution resistance and fix pigment bodies.

Description

technical field [0001] The invention relates to the surface treatment of alloy materials, in particular to a surface treatment method of magnesium and aluminum alloys. Background technique [0002] Due to its high strength / weight ratio, easy forming and processing, and excellent physical and chemical properties, magnesium-aluminum alloy materials have become more metal materials than aluminum alloys in industry. However, magnesium-aluminum alloy materials have low hardness and poor wear resistance, and frequent abrasion and damage. Therefore, before use, magnesium-aluminum alloys often need to undergo corresponding surface treatment to meet their environmental adaptability and safety, reduce abrasion, and prolong their durability. service life. [0003] Since the surface of magnesium-aluminum alloy is easy to form an oxide film, it is very stable in the atmosphere, but the wear resistance and corrosion resistance of the naturally formed oxide film are not strong enough, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30
Inventor 赵金安苗秀荣郝瑞刚耿振香
Owner TAIYUAN INST OF TECH
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