Sealing treatment method of micro arc oxidation ceramic membrane

A technology of micro-arc oxidation and sealing treatment, which is applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of poor corrosion resistance of aluminum-copper alloys and difficulty in meeting requirements, and achieve improved wear resistance and corrosion resistance. Effect of improving electrical insulation performance and reducing contamination

Inactive Publication Date: 2012-01-25
CSIC NO 12 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the poor corrosion resistance of aluminum-copper alloys, it is difficult to meet the requirements with the above-mentioned sealing method when used in harsh corrosive environments.

Method used

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  • Sealing treatment method of micro arc oxidation ceramic membrane
  • Sealing treatment method of micro arc oxidation ceramic membrane
  • Sealing treatment method of micro arc oxidation ceramic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] ZL101A micro-arc oxidation sample: 60×40×5mm, film thickness about 35μm, decontamination and degreasing.

[0037] Organosilicon sealing agent configuration: Stir and mix the organosilicon stock solution and more than 95% alcohol according to the mass ratio of 10:1.

[0038] Vacuum impregnation: the sample is put into a pressure-resistant container and sealed, then vacuumed, vacuum degree: 10 -4 MPa, inject the sealing agent to submerge all parts, release the vacuum, press the sealing agent into the micropores of the film layer by atmospheric pressure, and repeat the operation again.

[0039] Heating and curing: put the impregnated sample into the holding furnace and keep it warm at 150°C for 20 minutes.

Embodiment 2

[0041] ZL205A micro-arc oxidation sample 60×40×5mm, film thickness about 35μm, decontamination and oil removal. Organosilicon sealing agent configuration: Stir and mix the organosilicon stock solution and more than 95% alcohol according to the mass ratio of 10:1.

[0042] Vacuum impregnation: the sample is put into a pressure-resistant container and sealed, then vacuumed, vacuum degree: 5×10 -3 MPa, inject the sealing agent to submerge all parts, release the vacuum, press the sealing agent into the micropores of the film layer by atmospheric pressure, and repeat the operation again.

[0043] Heating and curing: put the impregnated sample into a holding furnace and keep it warm at 150°C for 15 minutes.

Embodiment 3

[0045] AZ61 micro-arc oxidation sample: 60×40×5mm, film thickness about 35μm, decontamination and oil removal.

[0046] Organosilicon sealing agent configuration: Stir and mix the organosilicon stock solution and more than 95% alcohol according to the mass ratio of 8:1.

[0047] Vacuum impregnation: the sample is put into a pressure-resistant container and sealed, then vacuumed, vacuum degree: 10 -2 MPa, inject the sealing agent to submerge all parts, release the vacuum, press the sealing agent into the micropores of the film layer by atmospheric pressure, and repeat the operation again.

[0048] Heating and curing: put the impregnated sample into a holding furnace and keep it warm at 130°C for 20 minutes.

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Abstract

The invention discloses a sealing treatment method of a micro arc oxidation ceramic membrane. The sealing treatment method comprising the following steps: firstly, decontaminating and deoiling the surface of an aluminium alloy micro arc oxidation sample to be sealed with acetone; then carrying out ultrasonic vibration cleaning by adopting distilled water of 50-60 DEG C; subsequently, carrying out vacuum impregnation by adopting an organic silicon stock solution and more than 95% alcohol; and finally putting the aluminium alloy micro arc oxidation sample into a heat preserving furnace for heat preservation so as to complete sealing treatment. By applying the sealing treatment method of the micro arc oxidation ceramic membrane, the abrasion resistance and corrosion resistance performances of the micro arc oxidation membranous layer can be greatly improved, the contamination performance of the oxidation membranous layer can be effectively reduced, the electrical insulating property of the oxidation membranous layer is improved, and the toughness of the membrane layer is improved.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment, and relates to a sealing treatment method, in particular to a sealing treatment method of a micro-arc oxidation ceramic membrane. Background technique [0002] Micro-arc oxidation is to place Al, Mg, Ti, Ta, Nb and other valve metals and their alloys in a certain electrolyte system, and use electrochemical methods to generate spark discharge on the surface of the material. Under the combined action of chemicals, a method of forming a ceramic film layer on the surface of the valve metal. The film obtained in this way has properties such as wear resistance, corrosion resistance, and high temperature impact resistance that are significantly higher than those of traditional anodized films. Its microhardness can reach up to 2000Hv, its thickness can reach 200-300μm, and it is metallurgically bonded with the matrix. [0003] During the micro-arc oxidation process, the micro-plasma ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/18
Inventor 穆燿钊杨艳张镜斌王伟
Owner CSIC NO 12 RES INST
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