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High-corrosion-resistance aluminum alloy composite and preparation method thereof

A technology of high corrosion resistance and composite materials, which is applied in the direction of coating, pretreatment surface, and device for coating liquid on the surface, etc. Combined with problems such as insufficient stability, the effects of avoiding loose material structure, excellent high temperature resistance and chemical stability, and preventing oxidation are achieved.

Inactive Publication Date: 2018-12-18
SHANDONG INNOVATION METAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Graphene-enhanced aluminum-based nanocomposites in the prior art have the following problems in the preparation process: (1) because graphene materials have a very large specific surface area, graphene nanomaterials tend to overlap each other to reduce their surface energy, resulting in It is easy to agglomerate in the preparation process of composite materials, which makes it difficult for graphene nanomaterials to disperse evenly in the aluminum alloy matrix, which adversely affects the mechanical properties of composite materials; (2) graphene nanomaterials and aluminum alloy matrix materials The interfacial bonding between them is not stable enough, which affects the stability and mechanical properties of composite materials
[0005] On the other hand, the lack of corrosion resistance of the existing Al-Mg-Si alloy alloys limits its use

Method used

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  • High-corrosion-resistance aluminum alloy composite and preparation method thereof
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Effect test

Embodiment 1

[0057] A high corrosion-resistant aluminum alloy composite material, comprising an aluminum alloy composite material and a corrosion-resistant coating, the corrosion-resistant coating being a carborane-liquid fluoropolymer coating;

[0058] The aluminum alloy composite material includes a matrix aluminum alloy and a reinforcing phase distributed in the matrix aluminum alloy;

[0059] The chemical composition of the base aluminum alloy includes:

[0060] 1.5 wt% Mg;

[0061] 1.0wt% Si;

[0062] 0.5 wt% Co;

[0063] 0.8 wt% Mo;

[0064] 0.3 wt% RE;

[0065] 0.5 wt% Zn;

[0066] 0.03 wt% Cr;

[0067] The balance is aluminum;

[0068] The reinforcing phase is SiO 2 coated graphene.

[0069] The base aluminum alloy and SiO 2 The weight ratio of coated graphene is 1:0.01.

[0070] The carborane-liquid fluoropolymer is prepared by the following method: the high-pressure reactor is ventilated with nitrogen to replace the atmosphere, and then sequentially added a tetrahydrof...

Embodiment 2

[0076] A high corrosion-resistant aluminum alloy composite material, comprising an aluminum alloy composite material and a corrosion-resistant coating, the corrosion-resistant coating being a carborane-liquid fluoropolymer coating;

[0077] The aluminum alloy composite material includes a matrix aluminum alloy and a reinforcing phase distributed in the matrix aluminum alloy;

[0078] The chemical composition of the base aluminum alloy includes:

[0079] 2 wt% of Mg;

[0080] 1.0wt% Si;

[0081] 0.8 wt% Co;

[0082] 0.5 wt% Mo;

[0083] 0.3 wt% RE;

[0084] 0.2 wt% Zn;

[0085] 0.05 wt% Cr;

[0086] The balance is aluminum;

[0087] The reinforcing phase is SiO 2 coated graphene. The base aluminum alloy and SiO 2 The weight ratio of coated graphene is 1:0.05.

[0088] The carborane-liquid fluoropolymer is prepared by the following method: the high-pressure reactor is ventilated with nitrogen to replace the atmosphere, and then sequentially added a tetrahydrofuran sol...

Embodiment 3

[0095] A method for preparing a highly corrosion-resistant aluminum alloy composite material, comprising the following steps:

[0096] (1) SiO 2 Add the coated graphene into the solvent for ultrasonic dispersion for 10-20 minutes, then add aluminum alloy powder, stir and mix evenly, ultrasonically disperse for 10-20 minutes, and obtain the mixed powder after removing the solvent;

[0097] (2) Put the mixed powder prepared in step 1 into a VC high-efficiency mixer, and mix for 60 minutes under the condition of a rotating speed of 120r / min;

[0098] (3) Place the mixed powder obtained in step 2 in a stirring ball mill, fill it with liquid nitrogen, and start ball milling when all the balls are submerged in liquid nitrogen, the ball-to-material ratio is 30:1, and ball mill for 4 to 6 hours;

[0099] (4) Put the composite powder uniformly mixed by ball mill into the prefabricated graphite mold, and carry out surface activation treatment in the plasma activation sintering furnace,...

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Abstract

The invention belongs to the technical field of aluminum alloy nanocomposites, and particularly relates to a high-corrosion-resistance aluminum alloy composite and a preparation method thereof. The high-corrosion-resistance aluminum alloy composite comprises an aluminum alloy composite body and a corrosion-resistant coating. The corrosion-resistant coating is a carborane-liquid fluorine polymer coating. The aluminum alloy composite body comprises matrix aluminum alloy and a reinforcement phase distributed in the matrix aluminum alloy. The reinforcement phase is graphene wrapped with SiO2. According to the high-corrosion-resistance aluminum alloy composite, the corrosion resistance of the aluminum alloy is enhanced through the carborane-liquid fluorine polymer coating, so that the chemicalcorrosion resistance of an obtained product is greatly improved. Liquid fluorine elastomers have excellent chemical resistance, carborane has excellent high-temperature resistance and chemical stability, and thus, the corrosion resistance of the aluminum alloy can be greatly improved by coating the surface of the aluminum alloy with a polymer of the liquid fluorine elastomers and the carborane.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy nanocomposite materials, and in particular relates to a highly corrosion-resistant aluminum alloy composite material and a preparation method thereof. Background technique [0002] Aluminum alloy composite materials have the characteristics of easy processing, light weight, high specific strength and low thermal expansion coefficient, and are widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. Commonly used aluminum alloy composite material reinforcements include alumina, boron carbide and silicon carbide, etc. The addition of these reinforcements can greatly improve the strength and elastic modulus of aluminum alloy composite materials. Phase (Al 3 C 4 ), Al 3 C 4 Is a brittle phase that can lead to a decrease in the toughness of the composite. [0003] Graphene has a high-strength two-dimensional structure and an ultra-high s...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C32/00C22C1/05B22F3/105C22F1/047B05D3/02B05D7/24
CPCC22C21/08B05D3/002B05D3/0254B05D7/24B22F3/105B22F2003/1051B22F2998/10C22C1/05C22C32/00C22F1/002C22F1/047B22F1/0003B22F2009/043B22F2003/248B22F2003/242
Inventor 崔立新赵晓光王泽滨张晓李科霍刚胜成凯
Owner SHANDONG INNOVATION METAL TECH
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