Anti-corrosion magnesium alloy and preparation method thereof

A corrosion-resistant, magnesium alloy technology, applied in the field of alloys, can solve problems such as low equilibrium potential, galvanic corrosion, and poor corrosion resistance, and achieve the effects of reducing cathodic effects, refining grains, and excellent corrosion resistance

Inactive Publication Date: 2018-08-17
合肥博创机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, magnesium has high chemical activity, its equilibrium potential is very low, and it is prone to galvanic corrosion when in contact with different metals. At room temperature, the surface of magnesium reacts with oxygen in the air to form a magnesium oxide film, but due to magnesium oxide, the film It is relatively loose, and its compactness coefficient is only 0.79, that is, the volume of magnesium oxide generated after magnesium oxidation is reduced, so the corrosion resistance is very poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of corrosion-resistant magnesium alloy, comprises the raw material of following percentage by weight:

[0028] Aluminum 6%, zinc 2%, manganese 0.8%, barium 0.4%, zirconium 0.2%, cadmium 0.2%, lithium 0.3%, rare earth element 0.1%, carbon nanotube 0.1%, and the balance is magnesium.

[0029] The rare earth elements are composed of lanthanum and samarium in a mass ratio of 1:1.

[0030] This embodiment also discloses a method for preparing the above-mentioned corrosion-resistant magnesium alloy, which specifically includes the following steps:

[0031] (1) Preheating: each component is weighed according to the number of raw materials of the above-mentioned corrosion-resistant magnesium alloy, after removing impurities, it is placed to dry at 70 degrees Celsius, the surface moisture of the raw materials is removed, and the temperature is raised to 180 degrees Celsius for preheating;

[0032] (2) Smelting: Put the raw materials in the magnesium and aluminum smelting...

Embodiment 2

[0041] A kind of corrosion-resistant magnesium alloy, comprises the raw material of following percentage by weight:

[0042] 8% aluminum, 3% zinc, 1.2% manganese, 0.6% barium, 0.4% zirconium, 0.4% cadmium, 0.5% lithium, 0.3% rare earth elements, 0.2% carbon nanotubes, and the balance is magnesium.

[0043] The rare earth element is composed of cerium element and neodymium element in a mass ratio of 1:1.

[0044] This embodiment also discloses a method for preparing the above-mentioned corrosion-resistant magnesium alloy, which specifically includes the following steps:

[0045] (1) Preheating: Weigh each component according to the number of raw materials of the above-mentioned corrosion-resistant magnesium alloy, after removing impurities, dry at 70-90 degrees Celsius, remove the surface moisture of the raw materials, heat up to 240 degrees Celsius, and preheat ;

[0046] (2) Smelting: Put the raw materials in the magnesium and aluminum smelting furnace, the melting temperat...

Embodiment 3

[0055] A kind of corrosion-resistant magnesium alloy, comprises the raw material of following percentage by weight:

[0056]Aluminum 7%, zinc 2.6%, manganese 1%, barium 0.5%, zirconium 0.3%, cadmium 0.3%, lithium 0.4%, rare earth elements 0.2%, carbon nanotubes 0.15%, and the balance is magnesium.

[0057] The rare earth element is scandium.

[0058] This embodiment also discloses a method for preparing the above-mentioned corrosion-resistant magnesium alloy, which specifically includes the following steps:

[0059] (1) Preheating: each component is weighed according to the number of raw materials of the above-mentioned corrosion-resistant magnesium alloy, after removing impurities, it is placed to dry at 78 degrees Celsius, the surface moisture of the raw materials is removed, and the temperature is raised to 200 degrees Celsius for preheating;

[0060] (2) Smelting: put the raw materials into the magnesium and aluminum smelting furnace, the melting temperature is raised to ...

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PUM

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Abstract

The invention discloses anti-corrosion magnesium alloy and a preparation method thereof, and relates to the technical field of alloy. The anti-corrosion magnesium alloy comprises the following raw materials, by weight, 6-8% of aluminum, 2-3% of zinc, 0.8-1.2% of manganese, 0.4-0.6% of barium, 0.2-0.4% of zirconium, 0.2-0.4% of cadmium, 0.3-0.5% of lithium, 0.1-0.3% of a rare earth element, 0.1-0.2% of a carbon nano tube and the balance magnesium. The anti-corrosion magnesium alloy has good compression resistance and mechanical shock resistance, and by adding the carbon nano tube and other newalloy elements, the magnesium alloy which is high in strength and good in corrosion resistance is obtained.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a corrosion-resistant magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is a high-performance lightweight structural material made of magnesium. Its specific gravity is similar to that of plastic, and its rigidity and strength are no less than that of aluminum. It has strong shockproof, anti-electromagnetic, thermal conductivity, and electrical conductivity. Magnesium alloy is light in weight, its density accounts for two-thirds of aluminum, its strength is higher than that of aluminum alloy and steel, it can withstand a certain load, it has good castability and dimensional stability, it is easy to process, low scrap rate, and has good damping The coefficient of shock absorption is greater than that of aluminum alloy and cast iron, which is very suitable for the production of automobiles, and has a wide range of application space in ae...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C26/00C22C1/06C22F1/06
CPCC22C1/06C22C23/02C22C26/00C22C2026/002C22F1/06
Inventor 何飞
Owner 合肥博创机械制造有限公司
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