Corrosion resistant technique for magnesium alloy combining aluminum cladding and plastic deformation

A plastic deformation and magnesium alloy technology, applied in the direction of metal layered products, chemical instruments and methods, layered products, etc., can solve the problems of low overall component strength, environmental pollution, sprayed coating peeling off, etc., and achieve low cost and high efficiency. Mechanical properties, no pollution effect

Inactive Publication Date: 2012-07-11
ZHONGBEI UNIV
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Problems solved by technology

[0010] In view of some shortcomings in current magnesium alloy anti-corrosion technology, such as the addition of rare earth elements will make the price expensive, the surface chemical treatment will pollute the environment, thermal spraying wi

Method used

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  • Corrosion resistant technique for magnesium alloy combining aluminum cladding and plastic deformation
  • Corrosion resistant technique for magnesium alloy combining aluminum cladding and plastic deformation
  • Corrosion resistant technique for magnesium alloy combining aluminum cladding and plastic deformation

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Embodiment 1

[0035] The AZ80 magnesium alloy anticorrosion process combining aluminum cladding and plastic deformation includes the following steps:

[0036] (1) Homogenization annealing of AZ80 magnesium alloy

[0037] Place the φ300×160 size magnesium alloy ingot workpiece in a box furnace for homogenization annealing treatment at a treatment temperature of 400°C, keep it warm for 12 hours, and then air cool;

[0038] (2) Surface treatment of magnesium alloy and aluminum coating

[0039] The homogenized annealed AZ80 magnesium alloy ingot was turned to remove the oxide skin, and cut into a circular cake-shaped sample with a size of φ290×15 along the axial direction, and placed in a nitrogen protection environment.

[0040] The aluminum ingot is cut and processed into an aluminum cladding layer with the same diameter as the AZ80 magnesium alloy sample and a thickness of 2mm, and the oil stain on the surface is cleaned with acetone. Under the protection of nitrogen, the surface of the alu...

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Abstract

The invention discloses a corrosion resistant technique of magnesium alloy combining aluminum cladding and plastic deformation, comprising the steps of: cladding a layer of aluminum or aluminum alloy on the surface of the magnesium alloy, then performing plastic deformation at a relatively high temperature under appropriate conditions to form favorable physical weld between the aluminum cladding and the aluminum alloy base on the basis of mechanical bond to produce a very thin intermetallic compound diffusion layer, which has superior corrosion resistance to significantly reduce the corrosion rate of the magnesium alloy. Meanwhile, the surface of the magnesium alloy base is clad with aluminum or aluminum alloy that has very high passivation so as to avoid partial corrosion of battery resulting from all kinds of defects and achieve the purpose of improving the corrosion resistance of the magnesium alloy base. Additionally, plastic deformation can refine the grains of the magnesium alloy base and the aluminum cladding, so as to improve the mechanical property of the both and further improve the corrosion resistance of the magnesium alloy base and the aluminum cladding.

Description

technical field [0001] The invention relates to a magnesium alloy anticorrosion process, in particular to a magnesium alloy anticorrosion process combining aluminum cladding and plastic deformation. Background technique [0002] Magnesium alloy is light in weight (density is 1.74g / cm 3 , is 2 / 3 of aluminum, 1 / 4 of steel), high specific strength and specific stiffness, good electromagnetic shielding performance, excellent shock absorption and shock resistance, and easy to form and recycle. In recent years, as a rapidly emerging engineering material, magnesium alloy has grown rapidly at a rate of 15% per year. It has a very important role in 3C (Communications, Computer and Consumer Electronics) products, automobiles, aerospace, military and other industries. Wide application prospects. [0003] Nevertheless, poor corrosion resistance has always been the main bottleneck limiting magnesium alloys as structural materials. [0004] At present, the widely used magnesium-aluminu...

Claims

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Application Information

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IPC IPC(8): C22F1/06B32B15/01
Inventor 徐宏妍杨亚琴张治民王强李智勇
Owner ZHONGBEI UNIV
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