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Treatment method of magnesium alloy material capable of being absorbed by human body and magnesium alloy composite layer

A processing method and material processing technology, applied in the field of medical devices, can solve the problems of fast corrosion rate of absorbable magnesium alloy materials and the like

Active Publication Date: 2009-10-21
BIOTYX MEDICAL (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a treatment method for human body absorbable magnesium alloy material, aiming at solving the problem of excessive corrosion rate of human body absorbable magnesium alloy material

Method used

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  • Treatment method of magnesium alloy material capable of being absorbed by human body and magnesium alloy composite layer
  • Treatment method of magnesium alloy material capable of being absorbed by human body and magnesium alloy composite layer
  • Treatment method of magnesium alloy material capable of being absorbed by human body and magnesium alloy composite layer

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Experimental program
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Effect test

Embodiment 1

[0032] The experimental materials are WE43 magnesium alloy instruments, which are degreased, washed with distilled water, dried with cold air, and placed in a desiccator for later use. The electrolyte consists of sodium silicate (Na 2 SiO 3 ) aqueous solution. Among them, the WE43 magnesium alloy device is used as the anode, and the stainless steel sheet is used as the cathode. During the reaction process, the temperature of the electrolyte is controlled at 40-45°C by circulating cooling, the test frequency is controlled at 600Hz, and the surface is treated by single-pulse square-wave discharge. Using 30mA / cm 2 The sample was subjected to micro-arc oxidation at a current density of The film thickness after oxidation for 10 minutes is 11.2 microns. The oxide film is mainly composed of crystalline MgO, Mg 2 SiO 4 composition. At the beginning of the oxidation process, an insulating film is formed on the surface of the sample soon. As the oxidation progresses, the film on...

Embodiment 2

[0036]The experimental materials are AM60B magnesium alloy instruments, degreased, washed with distilled water, dried with cold air, and placed in a desiccator for later use. The electrolyte consists of sodium silicate (Na 2 SiO 3 / KOH) aqueous solution. During the reaction process, the temperature of the electrolyte is controlled at 20-30°C by circulating cooling, the test voltage is 505±5V, and the surface treatment is carried out by double-pulse square-wave discharge. The positive and negative current densities used are j p = j n =6.0mA / dm 2 The sample was subjected to micro-arc oxidation at a current density of The thickness of the film layer after oxidation for 30 minutes is 37 microns. The surface roughness was 2.24. The oxide film is mainly composed of crystalline MgO, Mg 2 SiO 4 composition. At the beginning of the oxidation process, an insulating film is formed on the surface of the sample soon. As the oxidation progresses, the film on the surface of the ma...

Embodiment 3

[0040] The experimental materials are AZ91D magnesium alloy instruments, degreased, washed with distilled water, dried with cold air, and placed in a desiccator for later use. The electrolyte consists of sodium silicate (Na 2 SiO 3 / KOH) aqueous solution. During the reaction process, the temperature of the electrolyte is controlled at 30-45°C by circulating cooling, the experimental power supply is AC power supply, the power of the test power supply is 75kW, and the current density is 1000-1200A / m 2 The sample was subjected to micro-arc oxidation at a current density of Oxidation 30min film thickness is 25 microns. The surface roughness was 1.89. The oxide film is mainly composed of crystalline MgO, Mg 2 SiO 4 composition. At the beginning of the oxidation process, an insulating film is formed on the surface of the sample soon. As the oxidation progresses, the film on the surface of the magnesium alloy is broken down, leaving tiny discharge pores at the breakdown, and ...

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Abstract

The invention provides a treatment method of a magnesium alloy material capable of being absorbed by a human body and a magnesium alloy composite layer. The treatment method comprises the following steps: (1) the magnesium alloy material capable of being absorbed by the human body is washed to remove surface pollutants; (2) the magnesium alloy material capable of being absorbed by the human body is put in electrolyte solution containing silicon, micro-arc oxidation treatment is carried out under the condition that the voltage is larger than 200 to 600V, so as to lead the surface of the magnesium alloy material capable of being absorbed by living creature to form a micro-arc oxidation film layer; and (3) the magnesium alloy material capable of being absorbed by the human body after micro-arc oxidation treatment is washed and then dried. The magnesium alloy composite layer comprises the magnesium alloy material capable of being absorbed by the human body as matrix and the micro-arc oxidation film layer which covers the surface of the matrix and has the thickness of 0.5 to 50 microns; the micro-arc oxidation film layer comprises an inner layer and an outer layer, wherein the inner layer is an magnesium oxide layer and the outer layer is a crystalline compound layer of magnesium silicate or / and magnesium metasilicate. The magnesium alloy composite layer achieves the purpose of prolonging the degradation time of magnesium alloy.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a processing method for a human body absorbable magnesium alloy material and a magnesium alloy composite layer prepared by the human body absorbable magnesium alloy material processing method. Background technique [0002] With the development of medical technology, biomedical composite materials have become the most active field in the research and development of biomedical materials. Biomedical materials are special materials used for diagnosis, treatment or repair, replacement or artificial regeneration of body cells, tissues and organs, and their functions cannot be replaced by drugs. [0003] Traditional medical materials cannot be absorbed by the body after implantation. Because the implanted material only needs to function within a certain period of time, and after the function is completed, it must be removed by a second operation. For example, after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30A61L27/58A61L27/30A61L27/04
Inventor 张德元陈奕龙
Owner BIOTYX MEDICAL (SHENZHEN) CO LTD
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