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A method of improving corrosion resistance and wear resistance of magnesium metal surface

A technology of corrosion resistance and wear resistance, which is applied in metal material coating process, vacuum evaporation plating, coating, etc., can solve the problems of restricting application effect and low wear resistance, and achieve improved corrosion resistance and wear resistance Improved abrasiveness and reduced destructive effects

Active Publication Date: 2019-03-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the physiological environment, the degradation rate of magnesium and its alloys is too fast, and the defects of low wear resistance seriously restrict its practical application effect.

Method used

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  • A method of improving corrosion resistance and wear resistance of magnesium metal surface
  • A method of improving corrosion resistance and wear resistance of magnesium metal surface
  • A method of improving corrosion resistance and wear resistance of magnesium metal surface

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Embodiment 1

[0021] figure 1 It shows the double-glow plasma metallization furnace equipment used in the present invention, which mainly includes 9 parts, namely: 1-anode, 2-source, 3-control board, 4-source power supply, 5-workpiece power supply, 6-workpiece cathode, 7-argon gas, 8-cooling water, 9-vacuum device.

[0022] use figure 1 The device shown is to test a pure magnesium specimen with a thickness of 3mm and a side length of 10mm×10mm. The operation steps are as follows:

[0023] (1) Magnesium sample pretreatment: the magnesium sample was ground to 1200# with sandpaper, mechanically polished, and then ultrasonically cleaned in absolute ethanol.

[0024] (2) Put the pretreated magnesium sample into figure 1 On the sample stage of the double-glow plasma metallization furnace equipment shown, the planar graphite target is placed opposite to the sample, and the distance between the target and the sample is adjusted to 17cm.

[0025] (3) First use the vacuum device 9 to draw the air...

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Abstract

The invention discloses a method for improving the corrosion resistance and wear resistance of the surface of magnesium metal. The method comprises the steps that (1) a magnesium sample is pretreated; (2) the pretreated magnesium sample is put on a sample table of double-glow plasma surface alloying furnace equipment, and the distance between a graphite target and the sample is adjusted to be 15-20cm; (3) the air pressure of a vacuum chamber is vacuumized to be below 5Pa by using a vacuumizing device, then inert gas is introduced to enable the air pressure of the vacuum chamber to be stabilized at 34Pa-36Pa, a bias power supply is turned on, and the voltage of the bias power supply is slowly increased to 550V for sputter cleaning; and (4) residual gas is pumped out after cleaning is completed, inert gas is introduced, when the air pressure of the vacuum chamber is stabilized to 34Pa-36Pa, the bias power supply is turned on, the voltage of the bias power supply is slowly increased to 550V, the voltage difference between the source voltage and the cathode voltage is kept at 250V, heat preservation is carried out for 30 minutes, then cooling is carried out with the furnace for 2 hours, and the inert gas is closed. According to the method, the target distance can be increased, the purposes of heating effect and grain refinement can be achieved, and the damage to the surface of the sample can be reduced.

Description

technical field [0001] The invention relates to a method for improving the corrosion resistance and wear resistance of the surface of magnesium metal, belonging to the technical field of metal material surface modification. Background technique [0002] Magnesium is the lightest metal (density 1.4-1.9 g / cm 3 ). Magnesium and its alloys, as biodegradable biomaterials, can effectively reduce the stress shielding effect and facilitate fracture healing when implanted in the body. At the same time, it can avoid the pain and expense brought by the second operation to the patient after the fracture has healed. Therefore, magnesium and its alloys are expected to become a new generation of biometallic materials to replace existing traditional metal materials. However, in the physiological environment, the degradation rate of magnesium and its alloys is too fast, and the defects of low wear resistance seriously restrict its practical application. [0003] In order to solve the abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/46
CPCC23C14/46
Inventor 王欣赵丽丹于盛旺丁文强
Owner TAIYUAN UNIV OF TECH
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