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A kind of surface treatment method of magnesium alloy

A magnesium alloy and pretreatment technology, applied in the field of metal alloys, can solve the problems of large consumption capacity, pollution, immature technology, poor effect, etc., to avoid scratches, improve explosion-proof ability, and enhance electromagnetic shielding performance.

Active Publication Date: 2018-11-02
贵州航天风华精密设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used surface modification technologies for magnesium alloys mainly include: chemical conversion coating treatment, metal coating treatment and ion implantation, etc., but because magnesium is an active metal, only the effect of chemical conversion coating treatment is not good; Coating treatment mainly uses electroplating, electroless plating or thermal spraying to wrap metal coatings such as Zn and Cr on the surface. If only this method is used, the energy consumption and pollution caused are relatively large; ion implantation and laser treatment technologies are A hot topic in recent years, but its technology is not yet mature, and the cost is relatively high

Method used

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  • A kind of surface treatment method of magnesium alloy
  • A kind of surface treatment method of magnesium alloy
  • A kind of surface treatment method of magnesium alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for surface modification of a magnesium alloy, comprising the following steps:

[0031] (1) Substrate pretreatment: polish the magnesium alloy until the surface is bright, and clean it with acetone until the surface of the magnesium alloy is clean;

[0032] (2) Arc spraying: adopt arc spraying method to form phosphoric acid-based coating, aluminum-based composite coating on the substrate gained in step (1), the voltage of described arc spraying is 30V, electric current 108A, spraying distance is 150mm, argon pressure 0.63 MPa;

[0033] (3) Soaking: Soak the matrix obtained in step (2) in the modified vegetable oil for 0.8h;

[0034] (4) Magnetron sputtering coating: a silicon carbide layer is formed on the substrate obtained in step (3) by using the magnetron sputtering coating method, and the silicon carbide target is used as the target material, and the power supply of the silicon carbide target is set to 27Kw, and the argon gas flow rate is 150sccm, the co...

Embodiment 2

[0047] A method for surface modification of a magnesium alloy, comprising the following steps:

[0048] (1) Substrate pretreatment: Polish the magnesium alloy until the surface is bright, and clean it with acetone until the surface of the magnesium alloy is clean:

[0049] (2) Arc spraying: adopt arc spraying method to form phosphoric acid-based coating, aluminum-based composite coating on the substrate gained in step (1), the voltage of described arc spraying is 32V, electric current 105A, spraying distance is 150mm, argon pressure 0.75MPa;

[0050] (3) Soaking: Soak the matrix obtained in step (2) in the modified vegetable oil for 0.5h;

[0051] (4) Magnetron sputtering coating: a silicon carbide layer is formed on the substrate obtained in step (3) by using the magnetron sputtering coating method, and the silicon carbide target is used as the target material, and the power supply of the silicon carbide target is set to 26Kw, and the argon gas flow rate is 120sccm, the coa...

Embodiment 3

[0064] A method for surface modification of a magnesium alloy, comprising the following steps:

[0065] (1) Substrate pretreatment: polish the magnesium alloy until the surface is bright, and clean it with acetone until the surface of the magnesium alloy is clean;

[0066] (2) Arc spraying: adopt arc spraying method to form phosphoric acid-based coating, aluminum-based composite coating on the substrate gained in step (1), the voltage of described arc spraying is 31V, electric current 110A, spraying distance is 155mm, argon pressure 0.6 MPa;

[0067] (3) Soaking: Soak the substrate obtained in step (2) in modified vegetable oil for 1 hour;

[0068] (4) Magnetron sputtering coating: a silicon carbide layer is formed on the substrate obtained in step (3) by using the magnetron sputtering coating method, and the silicon carbide target is used as the target material, and the power supply of the silicon carbide target is set to 28Kw, and the argon gas flow rate is 200sccm, the co...

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Abstract

The invention relates to the technical field of metal alloys, in particular to a surface treatment method for a magnesium alloy. The method comprises the steps that the magnesium alloy is ground and washed with acetone till the surface is clean; a phosphoric acid base coating and an aluminum base composite coating are formed on a base body through an electric arc spraying method; then the base body is immersed in modified vegetable oil for 0.5 h-1 h; a silicon carbide layer is formed through a magnetron sputtering coating method; and finally a protection layer is formed in a coating manner. The magnesium alloy obtained through the surface modification method has good corrosion resistance and high temperature resistance, is remarkable in electromagnetic shielding effect and has the excellent comprehensive mechanical property.

Description

technical field [0001] The invention relates to the technical field of metal alloys, in particular to a surface treatment method for magnesium alloys. Background technique [0002] Magnesium and magnesium alloys have the characteristics of high specific strength, high specific stiffness, shock absorption, electromagnetic shielding and radiation resistance, and have extremely important application value and Broad application prospects. However, magnesium has active chemical properties and poor corrosion resistance, which seriously hinders the development and application of magnesium alloy products. [0003] As we all know, the surface state of magnesium alloy components can directly affect its performance, such as service life, corrosion resistance and high temperature resistance. application value. [0004] At present, the commonly used surface modification technologies for magnesium alloys mainly include: chemical conversion coating treatment, metal coating treatment and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/131C23C4/04C23C4/11C23C4/02C23C14/35C23C14/06C23C28/00C09D1/00C09D5/08C09D167/00
CPCC08K3/38C08K5/09C08K5/5419C08K13/02C08K2003/387C09D1/00C09D5/08C09D5/18C09D7/61C09D7/63C09D167/00C23C4/02C23C4/04C23C14/0635C23C14/35C23C28/00
Inventor 李翔光于丹敖四海王昌明俞开升
Owner 贵州航天风华精密设备有限公司