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Method for improving corrosion resistance of surface of Mg-10Li-3Al-3Zn magnesium-lithium alloy

A magnesium-lithium alloy and corrosion resistance technology, applied in the field of metal surface modification, can solve the problems of easy ablation of the alloy surface and high power consumption of the micro-arc oxidation technology, achieve good stability, increase the solid solution limit, and reduce battery activity Effect

Inactive Publication Date: 2019-05-28
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

However, the power consumption of micro-arc oxidation technology is high; when the voltage is high, the surface of the alloy is easy to ablate

Method used

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  • Method for improving corrosion resistance of surface of Mg-10Li-3Al-3Zn magnesium-lithium alloy
  • Method for improving corrosion resistance of surface of Mg-10Li-3Al-3Zn magnesium-lithium alloy
  • Method for improving corrosion resistance of surface of Mg-10Li-3Al-3Zn magnesium-lithium alloy

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Embodiment 1

[0035] A new ultra-light magnesium-lithium alloy (Mg-10Li-3Al-3Zn) plate with a size of 50mm×40mm×5mm was polished to 600# with sandpaper, and cleaned and wiped with acetone to remove the oxide film and oil on the metal surface. Fix the magnesium-lithium alloy plate on the workbench, use the IPG-4000 fiber laser with P=3500W, V=10m min -1 , f = 15mm, κ = 20% parameters for laser surface remelting, during the remelting process, the entire test plate is located in a protective cover filled with argon.

[0036] The structure of the base metal is composed of two phases of α+β. The thick white and long strips of α phase are evenly distributed on the gray β phase matrix, and the black granular precipitates are dispersed on the matrix, such as Figure 2a ; After laser surface remelting treatment, there is only β structure, and its grain size is about 5 μm, such as Figure 2b shown. refer to Figure 2a and Figure 2b, the laser surface remelting of Mg-10Li-3Al-3Zn magnesium-lithiu...

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Abstract

The present invention discloses a method for improving the corrosion resistance of the surface of a Mg-10Li-3Al-3Zn magnesium-lithium alloy. The method comprises the following steps: 1) grinding the surface of the new ultra-light magnesium-lithium alloy (Mg-10Li-3Al-3Zn), and then wiping the surface with acetone; 2) forming a plurality of remelting zones on the surface of Mg-10Li-3Al-3Zn magnesium-lithium alloy by using laser surface remelting until the surface of Mg-10Li-3Al-3Zn magnesium-lithium alloy is covered, wherein the overlapping ratio of the two adjacent remelting zones is 10%-20%, thus obtaining the treated Mg-10Li-3Al-3Zn magnesium-lithium alloy. The method can effectively avoid the problems encountered in chemical conversion coating, micro-arc oxidation and chemical plating.

Description

technical field [0001] The invention belongs to the field of metal surface modification, and relates to a method for improving the surface corrosion resistance of Mg-10Li-3Al-3Zn magnesium-lithium alloy. Background technique [0002] Magnesium-lithium alloy as an ultra-light alloy (ρ=1.45g / cm 3 ), light specific gravity, high specific strength, high specific stiffness, excellent electromagnetic shielding performance, biocompatibility and recyclability, and has broad application prospects in aerospace, automotive, medical, advanced electronics and sports equipment and other fields. Mg-10Li-3Al-3Zn magnesium-lithium alloy is an ultra-light structural material that has been developed and can be mass-produced. This material is frequently and widely used in my country's aerospace field. It was successfully used on my country's "Pujiang-1" satellite in 2015, the overall successful use of high-resolution micro-nano satellite structural parts in 2016, and the "communication technol...

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Application Information

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IPC IPC(8): C22F1/06
Inventor 张海波张林杰宁杰王涔鸿郭潜张延斌马茹原孙旭张颖云徐梅朱增辉
Owner XI AN JIAOTONG UNIV