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Automobile top cover aluminum alloy shell and processing process thereof

A technology of automobile roof and processing technology, which is applied in the direction of metal material coating technology, device for coating liquid on the surface, liquid chemical plating, etc. Alloy application and other issues to achieve the effects of avoiding galvanic corrosion, improving dispersion, and good mechanical properties

Active Publication Date: 2022-02-11
江苏瑞振压铸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Research on the corrosion resistance treatment of aluminum alloy surfaces has been in-depth. As a common corrosion-resistant material, graphene oxide is widely used in the direction of corrosion resistance of aluminum alloys. When used, the high conductivity of graphene oxide can easily cause galvanic corrosion, which will accelerate the corrosion of metals; the conventional solution is to disperse graphene oxide into organic coatings, but this operation is still prone to galvanic corrosion. , affecting the practical application of aluminum alloys

Method used

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  • Automobile top cover aluminum alloy shell and processing process thereof

Examples

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Effect test

Embodiment 1

[0049] A processing technology for an aluminum alloy shell of an automobile roof, comprising the following steps:

[0050] (1) Take the aluminum alloy substrate, polish the surface, place it in acetone solution, ultrasonically clean it for 10 minutes, then place it in ethanol solution, continue cleaning for 10 minutes, wash it with deionized water, dry it in vacuum, and set it aside;

[0051] (2) Take absolute ethanol and sodium nitrate, mix and stir, add tetraethyl orthosilicate, adjust the pH to 3, continue to stir for 10 minutes under sealed conditions, and then place in a 25°C water bath and stir for 6 hours to obtain solution A;

[0052] Take the aluminum alloy substrate treated in step (1), place it in solution A, and electrodeposit silicon dioxide on the surface of the aluminum alloy substrate to form a transition layer; the voltage during electrodeposition is 3V, and the deposition time is 1000s;

[0053] (3) Take iron oxyhydroxide, absolute ethanol and deionized water...

Embodiment 2

[0063] A processing technology for an aluminum alloy shell of an automobile roof, comprising the following steps:

[0064] (1) Take the aluminum alloy substrate, polish the surface, place it in acetone solution, ultrasonically clean it for 12 minutes, then place it in ethanol solution, continue cleaning for 15 minutes, wash it with deionized water, dry it in vacuum, and set it aside;

[0065] (2) Take absolute ethanol and sodium nitrate, mix and stir, add tetraethyl orthosilicate, adjust the pH to 3, continue to stir for 15 minutes under sealed conditions, and then stir for 5 hours in a water bath at 26°C to obtain solution A;

[0066] Take the aluminum alloy substrate treated in step (1), place it in solution A, and electrodeposit silicon dioxide on the surface of the aluminum alloy substrate to form a transition layer; the voltage during electrodeposition is 4V, and the deposition time is 900s;

[0067] (3) Take iron oxyhydroxide, absolute ethanol and deionized water, mix we...

Embodiment 3

[0077] A processing technology for an aluminum alloy shell of an automobile roof, comprising the following steps:

[0078] (1) Take the aluminum alloy substrate, put it in acetone solution after polishing the surface, ultrasonically clean it for 15 minutes, then put it in ethanol solution, continue cleaning for 20 minutes, wash it with deionized water, dry it in vacuum, and set it aside;

[0079] (2) Take absolute ethanol and sodium nitrate, mix and stir, add tetraethyl orthosilicate, adjust the pH to 3, continue to stir for 20 minutes under sealed conditions, and then stir for 4 hours in a 28°C water bath to obtain solution A;

[0080] Take the aluminum alloy substrate treated in step (1), place it in solution A, and electrodeposit silicon dioxide on the surface of the aluminum alloy substrate to form a transition layer; the voltage during electrodeposition is 5V, and the deposition time is 800s;

[0081] (3) Take iron oxyhydroxide, absolute ethanol and deionized water, mix w...

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Abstract

The present invention discloses an automobile top cover aluminum alloy shell and a processing technology thereof. Aiming at the problems that when the surface of an alloy is covered with graphene oxide, galvanic corrosion is easily caused by the high conductivity of the graphene oxide, and the corrosion to metal can be accelerated; according to a conventional solution, the graphene oxide is generally dispersed into an organic coating, then the organic coating is coated on the surface of an alloy to avoid the problem of galvanic corrosion, but during the actual operation, it is found that the problem of galvanic corrosion cannot be thoroughly avoided by only depending on the organic coating, so that the invention discloses the automobile top cover aluminum alloy shell and the processing process thereof. The automobile top cover aluminum alloy shell specifically and structurally comprises an aluminum alloy matrix, a transition layer, a middle layer and a corrosion-resistant coating. The prepared aluminum alloy shell has excellent corrosion resistance and is durable in corrosion resistance, when the corrosion-resistant coating on the outer surface is damaged, the aluminum alloy shell still can keep certain corrosion resistance, the corrosion resistance of the automobile shell can be effectively guaranteed, and higher practicability is achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy shells, in particular to an aluminum alloy shell for an automobile top cover and a processing technology thereof. Background technique [0002] Aluminum and aluminum alloys not only have the advantages of easy processing and forming, low density, high corrosion resistance, low thermal expansion coefficient, high specific strength, and outstanding strain performance, but also have a wide range of applications, such as food packaging, structural parts, energy, and transportation. It is extremely useful, and it is the non-ferrous metal material used in the metal industry after iron. [0003] Nowadays, because the volume of the car roof accounts for a large proportion of the body parts, in order to reduce the weight of the vehicle, aluminum alloy will be used instead of the conventional steel plate as the shell material to reduce fuel consumption. The corrosion resistance of the aluminum alloy...

Claims

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Application Information

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IPC IPC(8): B05D7/14B05D7/24B05D5/00C09D163/00C09D5/08C09D7/62C25D9/04C23C18/12
CPCB05D7/14B05D7/24B05D5/00C09D163/00C09D5/08C09D7/62C25D9/04C23C18/1208C23C18/1241C08L2205/025C08L63/00C08K9/08C08K9/04C08K3/042
Inventor 张麟雄
Owner 江苏瑞振压铸有限公司
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