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A kind of coated magnesium and its alloy and preparation method thereof

An alloy and alloy matrix technology, which is applied in the field of coating magnesium and its alloy and its preparation, can solve the problems of short service life, easy corrosion of magnesium and its alloy matrix in service, and achieve the effect of improving corrosion resistance and good electrical conductivity.

Active Publication Date: 2019-08-02
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned conductive functional films are all directly covered on the surface of magnesium and its alloys, and the conductive functional films are in direct contact with the matrix of magnesium and its alloys; it is well known that magnesium and its alloys have active chemical properties and are very prone to corrosion. , forming a primary battery corrosion system, magnesium as the cathode, will preferentially corrode, which leads to the fatal defects of the magnesium and its alloy matrix prepared by the traditional method of functional film service are easy to corrode and short life

Method used

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  • A kind of coated magnesium and its alloy and preparation method thereof
  • A kind of coated magnesium and its alloy and preparation method thereof
  • A kind of coated magnesium and its alloy and preparation method thereof

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preparation example Construction

[0028] The preparation method of above-mentioned coated magnesium and alloy thereof, comprises the following steps:

[0029] An insulating layer is formed on the surface of the magnesium and its alloy base 100 , and then a conductive film is formed on the surface of the insulating layer 110 .

[0030] The insulating layer 110 attached to the surface of magnesium and its alloy substrate 100 is an oxide film, and the method for forming the oxide film layer is:

[0031] Micro-arc oxidation is performed on magnesium and its alloy substrate 100 . In this embodiment, the insulating layer 110 with a porous structure is formed on the surface of the magnesium and its alloy substrate 100 through micro-arc oxidation treatment. During the micro-arc oxidation process, it is necessary to perform arcing treatment on the surface of the magnesium and its alloy substrate 100 . After the arcing treatment, an electric shock crater will be formed on the surface of the insulating layer 110 , that ...

Embodiment 1

[0045] A coated magnesium alloy comprises an insulating layer, a magnesium alloy substrate and a conductive film layer. The insulating layer is attached to the surface of the magnesium alloy substrate, the conductive film layer is attached to the surface of the porous ceramic insulating layer, and the insulating layer forms electrical isolation between the magnesium alloy substrate and the conductive film layer. Wherein, the insulating layer is made of a ceramic material with a porous structure, and the thickness of the multiple insulating layers is 3 μm. The material of the conductive film layer is silver.

[0046] The preparation method of the above-mentioned coated magnesium alloy comprises the following steps:

[0047] Take the magnesium alloy panel and polish it with 80# sandpaper to make the surface oxide skin fall off and the surface is smooth and flat. Place the polished magnesium alloy panel in the electrolytic cell for electrolysis, the electrolyte consists of 0.1g...

Embodiment 2

[0049] A kind of coating magnesium alloy, comprises the magnesium alloy base body and conductive film layer that form electrical isolation by porous ceramic insulating layer, porous ceramic insulating layer is attached to the surface of magnesium alloy base body, conductive film layer is attached to the surface of porous ceramic insulating layer, porous ceramic insulating layer The thickness is 15 μm, and the material of the conductive film layer is silver.

[0050] The preparation method of the above-mentioned coated magnesium alloy comprises the following steps:

[0051] Take the magnesium alloy panel and polish it with 500# sandpaper to make the surface oxide skin fall off and the surface is smooth and flat. Place the polished magnesium alloy panel in the electrolytic cell for electrolysis, the electrolyte consists of 0.5g / L NaOH, 8g / L NaOH 2 SiO 3 , 8g / L NaF composition, and the electrolyte submerges the magnesium alloy substrate by 12cm, the electrolysis voltage is 350V...

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Abstract

The invention relates to the field of surface processing and coating and a surface processing and coating technology of magnesium and alloy thereof, in particular to coated magnesium and alloy thereof and a preparation method thereof. The coated magnesium and alloy thereof comprise a magnesium and alloy thereof matrix of which electrical isolation is formed by an insulating layer and a conductive film layer, the insulating layer is attached to the surface of the magnesium and alloy thereof matrix, and the conductive film layer is attached to the surface of the insulating layer. The preparation method of the coated magnesium and alloy thereof comprises the steps that the insulating layer is formed on the surface of the magnesium and alloy thereof matrix, and then a conductive film is formed on the surface of the insulating layer. According to the coated magnesium and alloy thereof, through the synergistic action between the insulating layer and the conductive film layer, the coated magnesium and alloy thereof can have strong corrosion resistance simultaneously under the condition that good conductive performance is guaranteed.

Description

technical field [0001] The invention relates to the field of surface processing and coating, and is a surface processing and coating technology of magnesium and its alloys, in particular, it relates to a coated magnesium and its alloys and a preparation method thereof. Background technique [0002] Magnesium and its alloys have high specific strength and good thermal conductivity, and have important applications in aviation, aerospace, military, automobile and other fields. [0003] Many universities and research institutes at home and abroad have carried out research on functional coatings on the surface of magnesium and its alloys, but the research on conductive functional films is still in the enlightenment stage. At present, the research on the preparation of surface conductive films in most research institutions is limited to using traditional electroplating and chemical plating methods to plate a layer of copper, nickel, etc. on the surface of magnesium and its alloys;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/30
CPCC25D11/30
Inventor 陈燕飞宋晓村刘洪涛周吉学杨院生唐守秋
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI