Processing method for electromagnetic shielding of magnesium alloy surface and magnesium alloy product

A technology of electromagnetic shielding and treatment method, which is applied in the field of electromagnetic shielding treatment of magnesium alloy surfaces and magnesium alloy products, can solve the problems affecting the electromagnetic shielding performance of magnesium alloys, limited improvement of corrosion resistance, rapid surface corrosion, etc., so as to improve the electromagnetic shielding effect. , Good high temperature and high humidity resistance, the effect of improving corrosion resistance

Inactive Publication Date: 2012-07-11
SHENZHEN FUTAIHONG PRECISION IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the advantages of light weight, good heat dissipation, and good electromagnetic shielding, magnesium alloys are widely used in magnesium alloy products for 3C electronic products. However, with the rapid development of 3C electronic products, higher requirements are placed on the electromagnetic shielding performance of products. , therefore, magnesium alloy electronic products without electromagnetic shielding treatment can no longer meet the requirements
[0003] In addition, since the most obvious disadvantage of magnesium and magnesium alloys is poor corrosion resistance, exposure to the natural environment will cause rapid surface corrosion, which will also affect the electromagnetic shielding performance of magnesium alloys
[0004] The protective coating formed on the surface of the magnesium alloy substrate by magnetron sputtering coating technology has the advantages of high hardness, high wear resistance, good chemical stability, and firm combination with the magnesium alloy substrate. However, due to the magnetron sputtering technology itself The protective coating formed by this method cannot completely fill the cracks and holes on the surface of the magnesium alloy substrate, so the improvement of the corrosion resistance of magnesium alloy products is limited.

Method used

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  • Processing method for electromagnetic shielding of magnesium alloy surface and magnesium alloy product
  • Processing method for electromagnetic shielding of magnesium alloy surface and magnesium alloy product
  • Processing method for electromagnetic shielding of magnesium alloy surface and magnesium alloy product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) pre-coating treatment

[0050] The magnesium alloy substrate 11 is ultrasonically cleaned for about 25 minutes with absolute ethanol or isopropanone.

[0051] Put the cleaned magnesium alloy substrate 11 into the turntable of the vacuum coating machine 100 . The surface of the magnesium alloy substrate 11 is cleaned with argon plasma. The coating chamber 20 is vacuumized to a vacuum degree of 1.5×10 -3 Pa, the argon gas flow rate is 150sscm, the bias voltage applied to the magnesium alloy substrate 11 is -200V, and the plasma cleaning time is 5min. The vacuum coating machine used in this embodiment is produced by Beijing Danpu Surface Technology Co., Ltd., and the model is AS600DMTX05-X.

[0052] (2) Magnetron sputtering chromium metal layer 13

[0053]Keep the flow rate of the argon gas and the bias voltage applied to the magnesium alloy substrate 11 constant, heat the coating chamber to 150°C (that is, the coating temperature is 150°C), set the power of the fi...

Embodiment 2

[0060] (1) pre-coating treatment

[0061] The magnesium alloy substrate 11 is ultrasonically cleaned for about 25 minutes with absolute ethanol or isopropanone.

[0062] Put the cleaned magnesium alloy substrate 11 on the turntable of the vacuum coating machine 100 . The surface of the magnesium alloy substrate 11 is cleaned with argon plasma. The coating chamber 20 is vacuumized to a degree of vacuum of 2×10 -3 Pa, the argon gas flow rate is 200sscm, the bias voltage applied to the magnesium alloy substrate 11 is -150V, and the plasma cleaning time is 5min. The vacuum coating machine 100 used in this embodiment is produced by Beijing Danpu Surface Technology Co., Ltd., and its model is AS600DMTX05-X.

[0063] (2) Magnetron sputtering chromium metal layer 13

[0064] Keep the flow rate of the argon gas and the bias voltage applied to the magnesium alloy substrate 11 constant, heat the coating chamber from 20 to 200°C (that is, the coating temperature is 200°C), set the pow...

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Abstract

The invention provides a processing method for the electromagnetic shielding of a magnesium alloy surface. The processing method comprises the following steps of: providing a magnesium alloy matrix; sequentially forming a chromium metal layer and a titanium metal layer on the magnesium alloy matrix by adopting a magneto-controlled sputter coating method; and forming a protective layer on the titanium metal layer by adopting a spray finishing method, wherein the protective layer is an expoxy resin coating. The invention also provides the magnesium alloy product manufactured by the processing method.

Description

technical field [0001] The invention relates to an electromagnetic shielding treatment method on the surface of a magnesium alloy and a product thereof. Background technique [0002] Due to the advantages of light weight, good heat dissipation, and good electromagnetic shielding, magnesium alloys are widely used in magnesium alloy products for 3C electronic products. However, with the rapid development of 3C electronic products, higher requirements are placed on the electromagnetic shielding performance of products. , Therefore, magnesium alloy electronic products without electromagnetic shielding treatment can no longer meet the requirements. [0003] In addition, since the most obvious disadvantage of magnesium and magnesium alloys is poor corrosion resistance, exposure to the natural environment will cause rapid surface corrosion, which will also affect the electromagnetic shielding performance of magnesium alloys. [0004] The protective coating formed on the surface of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/14C23C14/35B32B15/092
CPCC23C14/165B05D2202/20B05D2350/65C23C28/00C23C28/023B32B15/08B32B2311/18C23C14/584B32B27/36C23C14/025B32B15/092Y10T428/12569
Inventor 姜传华李志强
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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