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A kind of preparation method of corrosion-resistant aluminum alloy

A corrosion-resistant aluminum alloy and aluminum alloy surface technology, which is applied in the direction of metal material coating process, coating, fusion spraying, etc., can solve the problems of multi-porosity, high brittleness, and reduced mechanical properties of the coating, and achieve high Corrosion resistance, high bonding effect

Active Publication Date: 2022-07-26
中山市明焱诚铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of the TiN coating prepared by CVD, PVD and other technologies is thin, which reduces the mechanical properties of the coating; while the thermal spraying reaction technology can be used to prepare a thicker TiN coating, but the coating contains more pores and is more brittle. , the coating quality is not easy to control

Method used

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  • A kind of preparation method of corrosion-resistant aluminum alloy
  • A kind of preparation method of corrosion-resistant aluminum alloy
  • A kind of preparation method of corrosion-resistant aluminum alloy

Examples

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Embodiment 1

[0039] A preparation method of corrosion-resistant aluminum alloy, comprising the following steps:

[0040] (1) Aluminum alloy surface cleaning treatment: The cleaning treatment includes mechanical grinding, sandblasting, deionized water cleaning, acetone wiping, pickling activation, and vacuum drying.

[0041] The mechanical grinding is to sequentially use 240#-1200# silicon carbide sandpaper to mechanically grind the sample.

[0042] The sandblasting material is 500-600 μm brown corundum, the sandblasting pressure is 1MPa, the sandblasting angle is 70°, and the distance between the spray gun and the surface of the mold is 0.13m.

[0043] The activation solution is a mixed solution of 30wt% nitric acid and 2wt% hydrofluoric acid, and the temperature is 25 o C, the time is 1 min.

[0044] (2) Plasma spraying the TiMnN layer on the surface of the aluminum alloy: place the aluminum material treated in step (1) in the equipment chamber, vacuumize it in advance to less than 40 Pas...

Embodiment 2

[0051] A preparation method of corrosion-resistant aluminum alloy, comprising the following steps:

[0052] (1) Aluminum alloy surface cleaning treatment: The cleaning treatment includes mechanical grinding, sandblasting, deionized water cleaning, acetone wiping, pickling activation, and vacuum drying.

[0053] The mechanical grinding is to sequentially use 240#-1200# silicon carbide sandpaper to mechanically grind the sample.

[0054] The sandblasting material is 500-600 μm brown corundum, the sandblasting pressure is 1MPa, the sandblasting angle is 70°, and the distance between the spray gun and the surface of the mold is 0.13m.

[0055] The activation solution is a mixed solution of 30wt% nitric acid and 2wt% hydrofluoric acid, and the temperature is 27.5 o C, the time is 1.5min.

[0056] (2) Plasma spraying the TiMnN layer on the surface of the aluminum alloy: place the aluminum material treated in step (1) in the equipment chamber, vacuumize it in advance to less than 4...

Embodiment 3

[0063] A method for preparing a corrosion-resistant aluminum alloy, comprising the steps of:

[0064] (1) Aluminum alloy surface cleaning treatment: The cleaning treatment includes mechanical grinding, sandblasting, deionized water cleaning, acetone wiping, pickling activation, and vacuum drying.

[0065] The mechanical grinding is to sequentially use 240#-1200# silicon carbide sandpaper to mechanically grind the sample.

[0066] The sandblasting material is 500-600 μm brown corundum, the sandblasting pressure is 1MPa, the sandblasting angle is 70°, and the distance between the spray gun and the surface of the mold is 0.13m.

[0067] The activation solution is a mixed solution of 30wt% nitric acid and 2wt% hydrofluoric acid, and the temperature is 30 o C, the time is 2min.

[0068] (2) Plasma spraying the TiMnN layer on the surface of the aluminum alloy: place the aluminum material treated in step (1) in the equipment chamber, vacuumize it in advance to less than 40 Pascals,...

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Abstract

The invention provides a preparation method of a corrosion-resistant aluminum alloy, which comprises the steps of cleaning the surface of the aluminum alloy, plasma spraying a TiMnN layer on the surface of the aluminum alloy, oxidation treatment, and phosphating to form a phosphating film. To obtain a coating with high corrosion resistance and high adhesion, especially when the coating thickness is greater than 2.5-3.5 microns, high corrosion resistance can also be maintained.

Description

technical field [0001] The invention relates to an aluminum alloy surface treatment method, in particular to a preparation method of a plasma coating and a post-treatment phosphating to obtain a corrosion-resistant coating. [0002] technical background [0003] Aluminum is the third period main group element, and its crystal structure belongs to face-centered cubic lattice without allotropic transformation. Aluminum and its alloy materials have the advantages of low density, easy forming, low price, and high specific strength, and have become the second largest metal material after steel in terms of output and use. Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. At present, the application of aluminum alloy materials has the following three aspects: one is as a stress member; the other is as a door, window, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/10C23C22/13
CPCC23C4/134C23C4/10C23C22/13
Inventor 王念贵
Owner 中山市明焱诚铝业有限公司
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