Magnesium alloy material with high corrosion resistance and preparation method of magnesium alloy material

A corrosion-resistant, magnesium alloy technology, applied in the field of high corrosion-resistant magnesium alloy materials and their preparation, can solve the problems of corrosion, magnesium alloy corrosion resistance is not too ideal, affecting the effect or life of the application, etc., to achieve a wide range of sources. Effect

Inactive Publication Date: 2015-03-11
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Magnesium alloys have many excellent properties, which is also the fundamental premise for the wide application of magnesium alloys. However, the application of magnesium alloys in various environments will inevitably cause corrosion problems, because the chemical activity of magnesium determines the corrosion resistance of magnesium alloys. It will be too ideal, and it may affect the effect or life of its application due to corrosion in various application environments, which will greatly increase the application cost of magnesium alloys
Magnesium Alloys Lose Momentum When Application Costs Are Too High

Method used

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  • Magnesium alloy material with high corrosion resistance and preparation method of magnesium alloy material
  • Magnesium alloy material with high corrosion resistance and preparation method of magnesium alloy material
  • Magnesium alloy material with high corrosion resistance and preparation method of magnesium alloy material

Examples

Experimental program
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Effect test

Embodiment 1

[0015] In this example, the composition and mass percentage of the high corrosion-resistant magnesium-aluminum alloy are: Al: 4.5%, Zn: 1.5%, Mn: 0.1%, Y: 0.1%; content of impurity elements: Fe: 0.008%, Ni: 0.001%, Cu: 0.0004%, Si: 0.02%, Ca: 0.0019%, and the balance is magnesium.

[0016] Weigh the material according to the ratio, preheat the pure magnesium ingot to 250°C and put it into a 45# steel crucible with a preheating temperature of 500°C to melt it, and pass it into SF 6 +CO 2 +N 2 Protective gas (mixed gas ratio / V%: 50N 2 +50CO 2 +0.3SF 6 ), and the temperature was raised to 700°C. After the magnesium ingot is completely melted, raise the temperature to 720°C, add pure aluminum preheated to 250°C, stir for 2-3 minutes after adding until it is completely melted, then follow the method of adding pure aluminum to keep the temperature at 720°C and add in sequence Pure zinc, Al-10%Mn master alloy, Mg-30%Y master alloy. After it is all melted, skim off the surface ...

Embodiment 2

[0018] In this example, the composition and mass percentage of the high corrosion-resistant magnesium-aluminum alloy are: Al: 5.0%, Zn: 1.8%, Mn: 0.2%, Y: 0.3%; content of impurity elements: Fe: 0.0063%, Ni: 0.0026%, Cu: 0.0004%, Si: 0.026%, Ca: 0.0023%, and the balance is magnesium.

[0019] Weigh the material according to the ratio, preheat the pure magnesium ingot to 250°C and put it into a 45# steel crucible with a preheating temperature of 500°C to melt it, and pass it into SF 6 +CO 2 +N 2 Protective gas (mixed gas ratio / V%: 50N 2 +50CO 2 +0.3SF 6 ), and the temperature was raised to 700°C. After the magnesium ingot is completely melted, raise the temperature to 720°C, add pure aluminum preheated to 250°C, stir for 2-3 minutes after adding until it is completely melted, then follow the method of adding pure aluminum to keep the temperature at 720°C and add in sequence Pure zinc, Al-10%Mn master alloy, Mg-30%Y master alloy. After it is all melted, skim off the surfa...

Embodiment 3

[0021] In this example, the composition and mass percentage of the high corrosion-resistant magnesium-aluminum alloy are: Al: 5.5%, Zn: 2.0%, Mn: 0.3%, Y: 0.5%; content of impurity elements: Fe: 0.0033%, Ni: 0.0011%, Cu<0.0004%, Si: 0.013%, Ca: 0.0020%, and the balance is magnesium.

[0022] Weigh the material according to the ratio, preheat the pure magnesium ingot to 250°C and put it into a 45# steel crucible with a preheating temperature of 500°C to melt it, and pass it into SF 6 +CO 2 +N 2 Protective gas (mixed gas ratio / V%: 50N 2 +50CO 2 +0.3SF 6 ), and the temperature was raised to 700°C. After the magnesium ingot is completely melted, raise the temperature to 720°C, add pure aluminum preheated to 250°C, stir for 2-3 minutes after adding until it is completely melted, then follow the method of adding pure aluminum to keep the temperature at 720°C and add in sequence Pure zinc, Al-10%Mn master alloy, Mg-30%Y master alloy. After it is all melted, skim off the surfac...

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PUM

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Abstract

The invention belongs to the field of metal materials, and particularly relates to an alloy proportion of a magnesium alloy with high corrosion resistance. The alloy material comprises components in percentage by mass as follows: 4.5%-5.5% of Al, 1.5%-2% of Zn, 0.1%-0.3% of Mn, 0.1%0.5% of Y as well as impurities, the impurities comprise elements as follows: smaller than or equal to 0.01% of Fe, smaller than or equal to 0.003% of Ni, smaller than or equal to 0.0004% of Cu, smaller than or equal to 0.03% of Si, smaller than or equal to 0.002% of Ca and the balance of magnesium. By means of Al, Mn, Zn and Y alloying scientific formula design, the corrosion resistance of the magnesium alloy is greatly improved with lower cost; and besides, 5% of NaCl contained neutral salt spray test is performed for 120 h, the corrosion rate v (agravity) is smaller than 0.008 mg*cm<-2>*h<-1>, and v (depth) is smaller than 0.5 mm/a.

Description

technical field [0001] The invention relates to a high corrosion-resistant magnesium alloy material and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] Magnesium alloys have many excellent properties, which is also the fundamental premise for the wide application of magnesium alloys. However, the application of magnesium alloys in various environments will inevitably cause corrosion problems, because the chemical activity of magnesium determines the corrosion resistance of magnesium alloys. It will be too ideal, and corrosion may affect its application effect or life in various application environments, which will greatly increase the application cost of magnesium alloys. When the application cost is too high, the application of magnesium alloy will lose momentum. It can be said that the corrosion problem is one of the key factors restricting the application of magnesium in various fields. Only by better solvi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/03C22C1/06
CPCC22C23/02C22C1/03C22C1/06
Inventor 毛红奎杨晓禹徐宏张国伟
Owner ZHONGBEI UNIV
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