Surface treatment method of magnesium alloy

A surface treatment, magnesium alloy technology, applied in the field of magnesium alloys, can solve the problems of poor weather resistance, poor oxidation corrosion of magnesium alloys, hinder the development of magnesium alloy parts, etc., to achieve improved protection performance, good oxidation corrosion resistance, easy promotion and effect achieved

Inactive Publication Date: 2017-10-24
DONGGUAN EONTEC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are more and more magnesium alloy parts, such as notebook casings, tablet casings, mobile phone frames, etc. In industrial production, problems such as poor oxidation and corrosion of magnesium alloys and poor weather resistance often occur. These problems have always plagued and hindered the magnesium alloy parts industry. field development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The magnesium alloy substrate is degreased in a degreased powder solution, the mass concentration of the degreased powder solution used is 3%, and the total alkalinity is 30mol / L; the degreasing temperature is 50°C, and the degreasing time is 5 minutes; Wash the subsequent substrate with clean water for 1 min to remove the potion on the surface;

[0058] Perform surface conditioning on the cleaned substrate. The mass concentration of the surface conditioning solution used is 10%, and the total acidity is 5mol / L; the temperature of the conditioning is 40°C, and the time for conditioning is 1 min; The substrate is cleaned with clean water for 1 minute, and then ultrasonically cleaned to remove the potion on the surface.

[0059] Neutralize the cleaned substrate, the mass concentration of the neutralizer solution used is 10%, and the total alkalinity is 11mol / L; the neutralization temperature is 70°C, and the neutralization time is 5 minutes; After that, the substrate is washe...

Embodiment 2

[0064] Degreasing the magnesium alloy substrate in a degreasing powder solution, the mass concentration of the degreasing powder solution used is 4%, and the total alkalinity is 40mol / L; the degreasing temperature is 60°C, and the degreasing time is 6 minutes; Wash the subsequent substrate with clean water for 2 minutes to remove the potion on the surface;

[0065] Perform surface conditioning on the cleaned substrate. The mass concentration of the surface conditioning solution used is 10%, and the total acidity is 8mol / L; the temperature of the conditioning is 45°C, and the time for conditioning is 2min; The substrate is first cleaned with clean water for 2 minutes, and then ultrasonically cleaned to remove the potion on the surface.

[0066] Neutralize the cleaned substrate, the mass concentration of the neutralizer solution used is 10%, and the total alkalinity is 14mol / L; the neutralization temperature is 75°C, and the neutralization time is 8min; After that, the substrate is ...

Embodiment 3

[0071] Degreasing the magnesium alloy substrate in a degreasing powder solution, the mass concentration of the degreasing powder solution used is 5%, and the total alkalinity is 50mol / L; the degreasing temperature is 70°C, and the degreasing time is 8 minutes; After degreasing, wash the substrate with clean water for 3 minutes to remove the potion on the surface;

[0072] Perform surface conditioning on the cleaned substrate, the mass concentration of the surface conditioning solution used is 10%, and the total acidity is 10mol / L; the temperature for the conditioning is 50°C, and the time for conditioning is 3min; The substrate is first cleaned with clean water for 3 minutes, and then cleaned with ultrasonic to remove the potion on the surface.

[0073] Neutralize the cleaned substrate, the mass concentration of the neutralizer solution used is 10%, and the total alkalinity is 16mol / L; the neutralization temperature is 80°C, and the neutralization time is 10 minutes; After the sub...

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Abstract

The invention provides a surface treatment method of a magnesium alloy. The surface treatment method comprises the step of sequentially carrying out degreasing, surface conditioning, formation and drying on a magnesium alloy substrate, wherein the alkalinity of a degreasing powder solution adopted during the degreasing process is 30 mol / L to 50 mol / L; the acidity of a surface conditioning agent solution adopted during the surface conditioning process is 5 mol / L to 10 mol / L; and the pH value of a formation reagent adopted during the formation process is 1.8 to 2.8. Compared with the prior art, the surface treatment method has the advantages that a protective film is formed on the surface of a magnesium alloy workpiece through reasonable control of the technological parameters during the degreasing, surface conditioning and formation process, the magnesium alloy has good oxidation corrosion resistance and weather resistance, and the surface treatment method is simple in technology, low in cost and easy to popularize and achieve.

Description

Technical field [0001] The invention relates to the technical field of magnesium alloys, in particular to a surface treatment method of magnesium alloys. Background technique [0002] At present, there are more and more magnesium alloy parts, such as notebook casings, tablet casings, mobile phone frames, etc. In industrial production, problems such as poor oxidation and corrosion of magnesium alloys and poor weather resistance often occur. These problems have been haunting the magnesium alloy parts industry. Field development. Studies have shown that the magnesium alloy matrix is ​​formed into a surface film before CNC machine tool (CNC) processing, and the oven is dried, which can increase the weather resistance of magnesium alloy parts, prevent corrosion and oxidation, and increase product coating. Install adhesion. However, the corrosion resistance of magnesium alloys is still poor after surface treatment in the prior art. The development of magnesium alloy surface treatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/06C23C22/78
CPCC23C22/06C23C22/78
Inventor 贾占魁李扬德李卫荣杨洁丹汤铁装
Owner DONGGUAN EONTEC CO LTD
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