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Preparation method of ZrO2/Al2O3 composite membrane on surfaces of aluminium and aluminium alloy

A technology of aluminum alloy surface and composite film, applied in the direction of electrolytic inorganic material coating, anodization, etc., can solve the problems of aerospace and aviation fields, etc., and achieve the effect of excellent corrosion resistance and improved corrosion resistance.

Inactive Publication Date: 2013-05-01
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the application of aluminum alloys in the aerospace and aviation fields puts forward higher requirements for the corrosion resistance and high temperature oxidation resistance of the ceramic film. Therefore, the ceramic film prepared by the existing technology can no longer meet the requirements of the aerospace and aviation fields.

Method used

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  • Preparation method of ZrO2/Al2O3 composite membrane on surfaces of aluminium and aluminium alloy
  • Preparation method of ZrO2/Al2O3 composite membrane on surfaces of aluminium and aluminium alloy
  • Preparation method of ZrO2/Al2O3 composite membrane on surfaces of aluminium and aluminium alloy

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Effect test

Embodiment 1

[0031] This embodiment aluminum and aluminum alloy surface ZrO 2 / Al 2 o 3 The preparation method of composite film The preparation method comprises the following steps:

[0032] Step 1. Add water-soluble zirconium salt, sodium dihydrogen phosphate, glycerin and disodium ethylenediamine tetraacetate into deionized water together, stir well to obtain a mixed solution, and then add sodium citrate to adjust the pH value of the mixed solution to 7 , to obtain the zirconium salt system solution; the concentration of the water-soluble zirconium salt in the zirconium salt system solution is 10g / L, the concentration of sodium dihydrogen phosphate is 2g / L, the concentration of glycerin is 15mL / L, and the concentration of ethylenediaminetetraacetic acid di The concentration of sodium is 2g / L; the water-soluble zirconium salt is zirconium acetate;

[0033] Step 2. Place the zirconium salt system solution described in step 1 in the micro-arc oxidation treatment tank as the micro-arc ox...

Embodiment 2

[0044] This embodiment aluminum and aluminum alloy surface ZrO 2 / Al 2 o 3 The preparation method of composite film The preparation method comprises the following steps:

[0045] Step 1. Add water-soluble zirconium salt, sodium dihydrogen phosphate, glycerin and disodium edetate into deionized water, stir well to obtain a mixed solution, and then add sodium citrate to adjust the pH value of the mixed solution to 8 , to obtain the zirconium salt system solution; the concentration of the water-soluble zirconium salt in the zirconium salt system solution is 25g / L, the concentration of sodium dihydrogen phosphate is 4g / L, the concentration of glycerin is 10mL / L, and the concentration of ethylenediaminetetraacetic acid di The concentration of sodium is 4g / L; The water-soluble zirconium salt is zirconium hydroxide;

[0046] Step 2. Place the zirconium salt system solution described in step 1 in the micro-arc oxidation treatment tank as the micro-arc oxidation electrolyte, place t...

Embodiment 3

[0048] This embodiment aluminum and aluminum alloy surface ZrO 2 / Al 2 o 3 The preparation method of composite film The preparation method comprises the following steps:

[0049] Step 1. Add water-soluble zirconium salt, sodium dihydrogen phosphate, glycerin and disodium ethylenediamine tetraacetate into deionized water, stir well to obtain a mixed solution, and then add sodium citrate to adjust the pH value of the mixed solution to 6 , to obtain the zirconium salt system solution; the concentration of the water-soluble zirconium salt in the zirconium salt system solution is 50g / L, the concentration of sodium dihydrogen phosphate is 2g / L, the concentration of glycerol is 10mL / L, and the concentration of ethylenediaminetetraacetic acid di The concentration of sodium is 3g / L; The water-soluble zirconium salt is zirconium carbonate;

[0050] Step 2. Place the zirconium salt system solution described in step 1 in the micro-arc oxidation treatment tank as the micro-arc oxidation...

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Abstract

The invention provides a preparation method of a ZrO2 / Al2O3 composite membrane on surfaces of aluminium and aluminium alloy. The method comprises the following steps that 1, water-soluble zircon salt, sodium dihydrogen phosphate, glycerol, disodium edetate, sodium citrate and deionized water are mixed; a zircon salt system solution is prepared; and 2, the zircon salt system solution is placed in a microarc oxidation treatment tank as a microarc oxidation electrolyte; aluminium or an aluminium alloy serves as an anode; a stainless steel plate serves as a cathode; microarc oxidation treatment is conducted; and then the uniform and dense ZrO2 / Al2O3 composite membrane is obtained on the surface of aluminium or the aluminium alloy. The ZrO2 / Al2O3 composite ceramic membrane prepared by the method has neutral NaCl salt mist corrosion resistance above 500h, and microhardness above 950Hv. The method has no special requirements on materials, shapes, dimensions and the like of aluminium or the aluminium alloy, and has wide applicability.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of metal materials, and in particular relates to a ZrO surface treatment method for aluminum and aluminum alloys. 2 / Al 2 o 3 Preparation method of composite membrane. Background technique [0002] Aluminum alloy is one of the most widely used alloys in modern industrial alloys. By adding a certain amount of copper, silicon, aluminum, zinc, manganese, and a small amount of nickel, iron, titanium, chromium, lithium and other elements to the aluminum matrix, the aluminum alloy can maintain the advantages of light weight of pure aluminum, and can also have Relatively high strength. This makes its "specific strength" better than many alloy steels, becoming an ideal structural material, widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries, such as aircraft fuselage, skin, compressor, etc. It is often made of aluminum alloy to reduc...

Claims

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Application Information

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IPC IPC(8): C25D11/06C25D9/06
Inventor 陈宏郝建民郝一鸣任鹏军樊正国
Owner CHANGAN UNIV
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