Magnesium alloy surface treating method and magnesium alloy prepared by same

A surface treatment, magnesium alloy technology, applied in the direction of anodic oxidation, etc., can solve the problems of poor corrosion resistance and achieve the effect of enhanced corrosion resistance, high adhesion, and uniform roughness

Active Publication Date: 2012-02-08
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention solves the technical problem of

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  • Magnesium alloy surface treating method and magnesium alloy prepared by same

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Effect test

Embodiment 1

[0032] 1), carry out micro-arc oxidation treatment to magnesium alloy workpiece: carry out electrolyte solution configuration according to following formula: sodium silicate 34g / L, sodium hydroxide 46g / L, sodium carbonate 32g / L, sodium phosphate 15g / L, adopt stirring and Cool and control the solution temperature to about 25°C. Using DC positive pulse current, the voltage is 370V, the frequency is set to 250Hz, and the duty cycle is 30%. After micro-arc oxidation for 25min, the thickness of the micro-arc oxidation film on the surface of the magnesium alloy workpiece is measured to be 20μm.

[0033] 2) Sandblasting the magnesium alloy after micro-arc oxidation: select 100-mesh white corundum, and reduce the thickness of the micro-arc oxidation film on the surface of the magnesium alloy workpiece to 11 μm by sandblasting, and the surface roughness is Ra 1.8 μm.

[0034] 3) After sand blasting, place the magnesium alloy in an ultrasonic cleaning tank and wash it in deionized water...

Embodiment 2

[0037] 1), carry out micro-arc oxidation treatment to magnesium alloy workpiece: carry out electrolyte solution configuration according to following formula: sodium silicate 34g / L, sodium hydroxide 46g / L, sodium carbonate 32g / L, sodium phosphate 15g / L, adopt stirring and Cool and control the solution temperature to about 25°C. Using DC positive pulse current, the voltage is 370V, the frequency is set to 180Hz, the duty cycle is 30%, and the oxidation time is 20min. The thickness of the micro-arc oxidation film on the surface of the magnesium alloy workpiece is measured to be 15μm.

[0038] 2) Perform sandblasting on the magnesium alloy after micro-arc oxidation, select 100-mesh white corundum, and reduce the thickness of the micro-arc oxidation film on the surface of the magnesium alloy workpiece to 6 μm and surface roughness Ra 1.9 μm by sandblasting.

[0039] 3) After sandblasting, place the magnesium alloy in an ultrasonic cleaning tank and wash it in deionized water at 90°...

Embodiment 3

[0042] 1), carry out micro-arc oxidation treatment to magnesium alloy workpiece: carry out electrolyte solution configuration according to following formula: sodium silicate 34g / L, sodium hydroxide 46g / L, sodium carbonate 32g / L, sodium phosphate 15g / L, adopt stirring and Cool and control the solution temperature to about 25°C. Using DC positive pulse current, the voltage is 370V, the frequency is set to 300Hz, the duty cycle is 25%, and the oxidation time is 30min. The thickness of the micro-arc oxidation film on the surface of the magnesium alloy workpiece is measured to be 30μm.

[0043] 2) Perform sandblasting on the magnesium alloy after micro-arc oxidation, select 100-mesh white corundum, and reduce the thickness of the micro-arc oxidation film on the surface of the magnesium alloy workpiece to 16 μm and surface roughness Ra 1.8 μm by sandblasting.

[0044] 3) After sandblasting, place the magnesium alloy in an ultrasonic cleaning tank and wash it in deionized water at 80...

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Abstract

The invention discloses a magnesium alloy surface treating method. The method comprises the following steps of: 1) performing micro-arc oxidation treatment on a magnesium alloy, and forming a micro-arc oxidation film layer on the surface of the magnesium alloy, wherein the micro-arc oxidation film layer comprises a compact layer and a loose layer; 2) performing sand blasting treatment on the magnesium alloy subjected to micro-arc oxidation to remove the loose layer; and 3) performing coating treatment on the magnesium alloy, and forming a coating on the compact layer. The invention also relates to the magnesium alloy prepared by the magnesium alloy surface treating method. The magnesium alloy comprises a magnesium alloy matrix and a film layer formed on the surface of the magnesium alloy matrix, wherein the film layer comprises a micro-arc oxidation layer and a coating which is coated on the micro-arc oxidation layer; and the micro-arc oxidation layer consists of the compact layer. By the magnesium alloy surface treating method, the corrosion resistance of the magnesium alloy can be obviously enhanced.

Description

technical field [0001] The invention relates to the field of magnesium alloy surface treatment, more specifically, to a magnesium alloy surface treatment method and a magnesium alloy prepared by the method. Background technique [0002] Magnesium alloy is currently the lightest metal engineering material with a density of 1.75-1.90g / cm 3 , only 2 / 3 of that of aluminum alloy, 1 / 4 of that of steel, high specific strength, good thermal and electrical conductivity, good damping, shock absorption and electromagnetic shielding functions, rich storage capacity, easy recycling, and increasingly widely used. As an electronic product, such as: mobile communication, notebook computer, etc., it can replace the plastics that are widely used at present, and meet the requirements of thinner, smaller and highly integrated electronic products. Especially the extensive application of magnesium alloys on automobile bodies can realize the light weight of automobiles. According to estimates, th...

Claims

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Application Information

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IPC IPC(8): C25D11/30
Inventor 赵军
Owner BYD CO LTD
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