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A kind of magnesium alloy self-sealing anodic oxidation method

An anodizing and magnesium alloy technology, applied in the direction of anodizing, can solve the problems of reduced corrosion resistance of the anodized layer, increased process complexity, no sealing treatment, etc., to shorten the oxidation time, the formula is simple and easy to obtain, and it is not easy to deposit slag. Effect

Active Publication Date: 2020-11-10
山西银光华盛镁业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anodic oxide layer of magnesium alloy has a porous structure, and without proper sealing treatment, the corrosion resistance of the anodic oxide layer will be greatly reduced. Therefore, an additional sealing process is required after anodic oxidation of magnesium alloys, which not only increases the complexity of the process, but also Increased processing costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A magnesium alloy self-sealing anodic oxidation electrolyte, the electrolyte comprising: potassium hydroxide, potassium fluoride, sodium silicate, water-soluble silicone resin, wherein the concentration of potassium hydroxide is 10g / L, potassium fluoride The concentration is 10g / L, the concentration of sodium silicate is 7g / L, and the concentration of water-soluble silicone resin is 5ml / L.

[0035] The water-soluble silicone resin is a mixture of water-soluble silicone monomer and Hk550.

[0036] The electrolyte uses deionized water as a solvent, and the concentration is the mass or volume of the electrolyte contained in the unit volume of the solution.

[0037] A magnesium alloy self-sealing anodic oxidation electrolysis method includes the following steps:

[0038] Pretreatment: pretreatment of magnesium alloy workpieces with alkaline washing, primary washing, acid washing, and secondary washing in sequence;

[0039] Anodizing: Using stainless steel as the cathode, immerse the...

Embodiment 2

[0044] A magnesium alloy self-sealing anodic oxidation electrolyte, the electrolyte comprising: potassium hydroxide, potassium fluoride, sodium silicate, water-soluble silicone resin, wherein the concentration of potassium hydroxide is 8g / L, potassium fluoride The concentration is 9g / L, the concentration of sodium silicate is 8g / L, and the concentration of the water-soluble silicone resin is 6ml / L.

[0045] The water-soluble silicone resin is a mixture of water-soluble silicone monomer and Hk550.

[0046] The electrolyte uses deionized water as a solvent, and the concentration is the mass or volume of the electrolyte contained in the unit volume of the solution.

[0047] A magnesium alloy self-sealing anodic oxidation electrolysis method includes the following steps:

[0048] Pretreatment: pretreatment of magnesium alloy workpieces with alkaline washing, primary washing, acid washing, and secondary washing in sequence;

[0049] Anodizing: Using stainless steel as the cathode, immerse t...

Embodiment 3

[0054] A magnesium alloy self-sealing anodic oxidation electrolyte, said electrolyte comprising: potassium hydroxide, potassium fluoride, sodium silicate, water-soluble silicone resin, wherein the concentration of potassium hydroxide is 7g / L, potassium fluoride The concentration is 7g / L, the concentration of sodium silicate is 6g / L, and the concentration of the water-soluble silicone resin is 4ml / L. The water-soluble silicone resin is a mixture of water-soluble silicone monomer and Hk550.

[0055] The electrolyte uses deionized water as a solvent, and the concentration is the mass or volume of the electrolyte contained in the unit volume of the solution.

[0056] A magnesium alloy self-sealing anodic oxidation electrolysis method includes the following steps:

[0057] Pretreatment: pretreatment of magnesium alloy workpieces with alkaline washing, primary washing, acid washing, and secondary washing in sequence;

[0058] Anodizing: Take stainless steel as the cathode, immerse the pret...

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Abstract

The invention provides a self-closing anodic oxidation method for a magnesium alloy, a dense and uniform closed anode oxide film can be formed on the magnesium alloy in one time, and the anodic oxidation process of the magnesium alloy can be simplified. A magnesium alloy self-closing anodic oxidation electrolyte comprises potassium hydroxide, potassium fluoride, sodium silicate, water-soluble silicone resin and deionized water. The water-soluble silicone resin is a water-soluble silicone monomer and Hk550 mixture. The self-closing anodic oxidation method for the magnesium alloy includes pretreatment; anodic oxidation, to be more specific, immersing a pretreated magnesium alloy workpiece in the electrolyte, and performing anodic oxidation with the oxidizing and electrolyzing time of 10-30 minutes; drying after washing. A composite protective layer prepared on the surface of the magnesium alloy by the method has the advantages of high bonding degree, high hardness, high wear resistance and corrosion resistance, and can meet high strength protection requirements of the magnesium alloy workpiece in the harsh environment.

Description

Technical field [0001] The invention provides a magnesium alloy self-sealing anodic oxidation method, which belongs to the technical field of metal material surface treatment. Background technique [0002] Magnesium alloys are alloys based on magnesium and added with other elements. Its characteristics are: low density, high specific strength, large specific modulus of elasticity, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloy, and good resistance to organics and alkali corrosion. Magnesium alloys are mainly used in aerospace, electronics and automobiles. [0003] As the application of magnesium alloys becomes more and more extensive, the market has more and more stringent requirements for the surface treatment of magnesium alloy products. Magnesium alloys are easily oxidized in the air due to their higher activity, which brings a lot to the pretreatment of magnesium alloys. Difficulty. The pretreatment chooses too strong oxidizing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/30
CPCC25D11/30
Inventor 赵李斌赵韩欣崔凯张红芳周豪光
Owner 山西银光华盛镁业股份有限公司
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