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A processing method and product thereof for improving corrosion resistance of magnesium alloy

A processing method and magnesium alloy technology, applied in the field of metal materials, can solve the problems of poor corrosion resistance, uneven structure, and high price of magnesium alloys, and achieve the effects of improving corrosion resistance, reducing residual stress, and improving corrosion resistance

Active Publication Date: 2020-06-09
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most magnesium alloy plates are produced by plastic processing such as extrusion and rolling. The plates have disadvantages such as large residual stress and uneven structure, which results in poor corrosion resistance of magnesium alloys, which is not conducive to the daily use of later products.
At the same time, most of the improvement of the corrosion resistance of magnesium alloys is mainly through surface treatment technologies such as coatings, which bring cumbersome processes and high prices. At the same time, surface treatment processes will also pollute the environment.

Method used

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  • A processing method and product thereof for improving corrosion resistance of magnesium alloy
  • A processing method and product thereof for improving corrosion resistance of magnesium alloy
  • A processing method and product thereof for improving corrosion resistance of magnesium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A processing method for improving the corrosion resistance of magnesium alloys, comprising the following steps: taking a 1mm magnesium alloy plate with a size of 20*30mm, performing uniform annealing at 300°C for 2 hours, and then performing strain rolling at room temperature along the forming direction of the plate at an angle of 30° system, the reduction is 5%, and finally annealed at 180°C for 8h.

[0015] The processed magnesium alloy was analyzed for corrosion resistance, grain size and (0001) basal texture strength, and the untreated magnesium alloy was used as a control. The results are shown in Table 1.

[0016] Table 1. Corrosion resistance, grain size and texture strength of the magnesium alloy prepared in this example

[0017]

[0018] The results show that after annealing and rolling treatment, the magnesium alloy produced has an anti-corrosion voltage of -1.55V and a corrosion current density of 2.67mA / cm 2 , 10 hours of hydrogen evolution = 1.3mL / cm 2...

Embodiment 2

[0020] A processing method for improving the corrosion resistance of magnesium alloys, comprising the following steps: taking a 1mm magnesium alloy plate with a size of 20*30mm, performing uniform annealing at 300°C for 2 hours, and then performing strain rolling at room temperature along the forming direction of the plate at an angle of 60° system, the reduction is 10%, and finally annealed at 200°C for 6h.

[0021] The processed magnesium alloy was analyzed for corrosion resistance, grain size and (0001) basal texture strength, and the untreated magnesium alloy was used as a control. The results are shown in Table 2.

[0022] Table 2. Corrosion resistance, grain size and texture strength of the magnesium alloy prepared in this example

[0023]

[0024] The results show that after annealing and rolling treatment, the corrosion resistance voltage of the prepared magnesium alloy = -1.45V, and the corrosion current density = 2.56mA / cm 2 , 10 hours of hydrogen evolution = 1.2...

Embodiment 3

[0026] A processing method for improving the corrosion resistance of magnesium alloys, comprising the following steps: taking a 1mm magnesium alloy sheet with a size of 20*30mm, performing uniform annealing at 300°C for 2 hours, and then carrying out strain rolling at room temperature along the forming direction of the sheet at 90° system, the reduction is 15%, and finally annealed at 150°C for 6h.

[0027] The processed magnesium alloy was analyzed for corrosion resistance, grain size and (0001) basal texture strength, and the untreated magnesium alloy was used as a control. The results are shown in Table 3.

[0028] Table 3. Corrosion resistance, grain size and texture strength of the magnesium alloy prepared in this example

[0029]

[0030] The results show that after annealing and rolling treatment, the magnesium alloy produced has an anti-corrosion voltage of -1.48V and a corrosion current density of 2.56mA / cm 2 , 10 hours of hydrogen evolution = 1.2mL / cm 2 , indica...

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Abstract

The invention relates to a processing method capable of improving anti-corrosion property of magnesium alloy and a product thereof. The processing method specifically comprises the following steps ofuniformly annealing the magnesium alloy, rolling at angle of 0 to 90 degrees along the forming direction of a sheet, pressing down with 0.5 to 15% quantity, and finally annealing for 6 to 12h at the temperature of 150 to 200 DEG C. The method has the advantages that the grains on the strong basal texture of the deformed sheet are uniform after uniform annealing; by performing rolling, the sheet isslightly deformed along the thickness direction, and the grains are re-oriented; the sheet with the strong basal texture is plastically deformed, the crystal twinning and the reinforcing of the basaltexture occur, and the corrosion rate is blocked by the same-direction orientation of a large amount of crystal twinning interfaces and basal surfaces, so that the corrosion-resistant property of themagnesium alloy is improved; the processing method is simple, is suitable for industrialized application, and the important meaning is realized in improving of the property of the magnesium alloy.

Description

technical field [0001] The invention belongs to the field of metal materials, relates to a processing method for improving the corrosion resistance of magnesium alloys, and also relates to a product obtained by the method. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in industrial applications. It has the advantages of good electromagnetic shielding performance, impact resistance, and wear resistance, and meets the requirements of light, thin, and integrated products. In recent years, it has been used in aerospace, transportation, and 3C. Rapid application in the field of electronic products. Most magnesium alloy plates are produced by plastic processing such as extrusion and rolling. The plates have disadvantages such as large residual stress and uneven structure, which results in poor corrosion resistance of magnesium alloys, which is not conducive to the daily use of later products. At the same time, most of the improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06
CPCC22F1/06
Inventor 杨青山曹鹏军余大亮
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY