Preparation method of micro-arc oxidation membrane of magnetic powder composite magnesium alloy

A magnetic powder, micro-arc oxidation technology, applied in anodizing, electrolytic coatings, coatings, etc., can solve the problems of limiting the application and development of micro-arc oxidation technology, and the single function of micro-arc oxidation film layer, so as to improve the resistance to Corrosion, the effect of expanding the application field

Inactive Publication Date: 2015-01-21
SHENYANG LIGONG UNIV
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Problems solved by technology

At present, the purpose of the micro-arc oxidation film is to enhance the corrosion resistance of light metals. There are a large number of discharge micropores on the surface of the oxide film, and the corrosive medium can enter the film through these micropores to corrode the substrate. At the same time, the function of the micro-arc oxidation film is single. , these problems limit the application and development of micro-arc oxidation technology

Method used

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Examples

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Embodiment Construction

[0013] The technical solutions of the present invention will be further described below in conjunction with the examples.

[0014] (1) Magnesium alloy after 400 # , 1000 # After the water abrasive paper is polished from coarse to fine, the surface is cleaned with deionized water and dried;

[0015] (2) Put the cleaned magnesium alloy into the electrolytic solution added with metal Ni powder, stir the electrolytic solution, so that the magnetic powder is evenly covered on the surface of the magnesium alloy matrix;

[0016] (3) Perform micro-arc oxidation treatment on the magnesium alloy that has been evenly covered with magnetic powder. The treatment time is 15-30 minutes. The electrolyte solution for micro-arc oxidation is a mixed solution of sodium silicate and sodium fluoride, and its concentration range is 5- 30g / L;

[0017] (4) Cleaning: the magnesium alloy after the micro-arc oxidation treatment is cleaned with deionized water;

[0018] (5) drying: cleaning and drying...

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Abstract

The invention relates to a preparation method of a magnesium alloy surface corrosion-resistant and functional protective layer, particularly relates to the preparation method of a micro-arc oxidation membrane of a magnetic powder composite magnesium alloy, and belongs to the technical field of surface treatment. By adding nano magnetic powder into a micro-arc oxidation electrolyte, a composite micro-arc oxidation ceramic membrane uniformly covered with magnetic powder can be formed on the surface of a magnesium alloy, micro-pores and cracks in the surface of a micro-arc oxidation membrane layer can be reduced by virtue of a composite membrane layer, and the corrosion resistance of the magnesium alloy is improved; meanwhile, the micro-arc oxidation membrane has a magnetic function and certain properties such as electromagnetic wave absorption, and the application field of the micro-arc oxidation membrane is expanded.

Description

technical field [0001] The invention relates to a method for preparing a corrosion-resistant and functional protective layer on the surface of a magnesium alloy, in particular to a method for preparing a magnetic powder composite magnesium alloy micro-arc oxidation film, which belongs to the technical field of surface treatment. technical background [0002] Magnesium alloy is characterized by its low density, high specific strength and specific stiffness, excellent machinability and castability, good damping and shock absorption, high thermal conductivity, high dimensional stability, excellent electromagnetic shielding performance and Excellent properties such as recycling are considered to be the most potential green materials for development and application in the 21st century. However, the low corrosion resistance of magnesium alloys limits its application. [0003] Micro-arc oxidation is a new technology for in-situ growth of ceramic layers directly on the surface of A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30C25D15/00
CPCC25D11/30C25D15/00
Inventor 邵忠财孔冰张弘
Owner SHENYANG LIGONG UNIV
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