A magnesium-based metal composite material, its preparation method and application

Abstract

The present invention belongs to the technical field of surface modification of metal materials, and discloses a magnesium-based metal composite material, a preparation method and an application thereof. The magnesium-based metal composite material of the present invention comprises a magnesium-based metal and magnesium-aluminum layered double hydroxide nanosheets located on the surface of the magnesium-based metal, and zirconium oxide is contained in the magnesium-aluminum layered double hydroxide nanosheets. By introducing zirconium oxide, the magnesium-aluminum layered double hydroxide nanosheets are further densified. The magnesium-aluminum layered double hydroxide nanosheets fix nano zirconium oxide through mechanical riveting action, which not only solves the problem of poor densification of the magnesium-aluminum layered double hydroxide nanosheets, but also solves the problems of poor bonding force of directly deposited zirconium oxide film layer and easy occurrence of cracks in the zirconium oxide film layer, thereby improving the densification and corrosion resistance of the product. At the same time, the bonding force between the magnesium-aluminum layered double hydroxide nanosheet film layer and the magnesium-based metal is strong and not easy to peel off.

Description

Technical Field

[0001] The present invention belongs to the technical field of surface modification of metal materials, and particularly relates to a magnesium-based metal composite material, a preparation method thereof, and an application thereof. Background Art

[0002] Magnesium is an essential element in the human body and is directly related to many biological mechanisms and metabolic reactions. Magnesium and its alloys have excellent mechanical properties, biocompatibility, and biodegradability, and are an ideal biomedical material. Compared with traditional bioceramics and polymers, magnesium-based metals not only have the conventional mechanical advantages of medical metal materials, but also have in vivo biodegradability and an elastic modulus more matching with human bones. This feature reduces the stress shielding effect at the implant / bone interface and reduces the possibility of secondary injury, standing out among traditional medical metal materials. From a physiological perspective, magnesium-based metals are slightly degraded by solidifying the adjacent tissues of the wound, which can avoid secondary surgery and the risk of infection. Compared with magnesium alloys, pure magnesium metal does not need to add other metal elements, which can avoid potential toxic substances from entering the human body and has great application prospects in the field of biomedical materials. However, magnesium-based metals have poor corrosion resistance in the human body, resulting in too fast a degradation rate. The large amount of hydrogen gas generated by rapid corrosion and the significant increase in the local pH value of body fluids can cause blood flow obstruction, tissue necrosis, and even patient death. The too short service life of magnesium-based metals and the negative effects brought by it limit their wide application in the field of biomedical implants. Therefore, controlling its degradation rate in human body fluids is the key to using medical magnesium materials as human implant materials.

[0003] Currently, the strategy to slow down the corrosion rate of magnesium-based metals in the human body is mainly to construct a surface protective coating. The surface protective coating can well regulate the degradation rate of magnesium-based metals in the human body, has better biological safety, and controllable costs, so it has received more attention. The common construction methods of the anti-corrosion film layer on the surface of magnesium-based metals include chemical conversion method, anodic oxidation, micro-arc oxidation, electroplating, electrophoresis, coating, etc.

[0004] Traditional chemical conversion treatment technologies mainly use hexavalent chromium ions to form a dense protective film on the surface of magnesium-based metals, which can effectively protect the substrate from corrosion and is widely used because of its low cost and simple process. However, hexavalent chromium ions are toxic and highly carcinogenic, seriously endangering the ecological environment and human health. Most of the electrolytes in anodic oxidation treatment also contain heavy metal elements such as chromium and manganese. Micro-arc oxidation, electroplating, and electrophoresis processes have safety and environmental protection problems such as high voltage, high temperature, and heavy metals in the electrolyte. In addition, the micro-arc oxidation treatment film layer on the surface of magnesium-based metals has poor denseness and forms a porous structure, making it difficult to block the erosion of corrosive media. The polymer film prepared by the coating process has the problem of poor bonding force between the coating and the substrate.

[0005] In recent years, the nanosheet-like double metal hydroxide film layer grown in situ on the surface of magnesium-based metals has attracted much attention due to its good physical barrier effect and ion exchange function, and has great potential in the corrosion protection of magnesium alloys. However, due to the porous structure of the nanosheets and poor compactness, there are still problems with insufficient corrosion protection performance. Some researchers have further sealed the pores by further covering a polymer film layer on the surface of the layered double metal hydroxide. Although the pore sealing effect is good, the simple coating forms a bilayer structure, which is extremely easy to peel off and difficult to be actually applied. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. For this reason, the present invention provides a magnesium-based metal composite material, its preparation method and application. The magnesium-based metal composite material has good compactness, strong film layer bonding force and good corrosion resistance.

[0007] In the first aspect of the present invention, there is provided a magnesium-based metal composite material, which includes a magnesium-based metal and magnesium-aluminum layered double metal hydroxide nanosheets located on the surface of the magnesium-based metal, and zirconium oxide is contained in the magnesium-aluminum layered double metal hydroxide nanosheets.

[0008] In some embodiments of the present invention, the magnesium-based metal is a magnesium-based metal with a magnesium content ≥ 99.99%.

[0009] In some embodiments of the present invention, the magnesium-aluminum layered double metal hydroxide nanosheets are of a single-layer structure.

[0010] In the second aspect of the present invention, there is provided a preparation method of the magnesium-based metal composite material according to the first aspect of the present invention, including the following steps:

[0011] Mix the magnesium-based metal and the aluminum salt solution, carry out a hydrothermal reaction to in-situ generate magnesium-aluminum layered double metal hydroxide nanosheets, and then perform ion cleaning to obtain a semi-finished product;

[0012] Mix the semi-finished product with a fluozirconate solution and carry out a water bath reaction to generate zirconium oxide, thereby obtaining the magnesium-based metal composite material.

[0013] In some embodiments of the present invention, the aluminum salt solution includes at least one of aluminum nitrate solution, aluminum chloride solution and aluminum sulfate solution.

[0014] In some embodiments of the present invention, the aluminum salt solution is an aluminum nitrate solution, and the concentration of the aluminum nitrate solution is 0.5 - 1.5 mmol / L, for example, it can be any point value among 0.5 mmol / L, 0.7 mmol / L, 0.9 mmol / L, 1.1 mmol / L, 1.3 mmol / L, 1.5 mmol / L, or a range value between any two point values.

[0015] In some embodiments of the present invention, the mass ratio of the magnesium-based metal to the aluminum salt solution is 1:3 to 1:12. For example, it can be any point value among 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, or a range value between any two point values.

[0016] In some embodiments of the present invention, the pH of the hydrothermal reaction is 9 - 11, preferably 10; and / or, the temperature of the hydrothermal reaction is 110 - 130 °C, preferably 120 °C; and / or, the time of the hydrothermal reaction is 14 - 16 h, preferably 15 h.

[0017] In some embodiments of the present invention, during the hydrothermal reaction process, ammonia water is used to adjust the pH value.

[0018] In some embodiments of the present invention, before the hydrothermal reaction, pretreatment of the magnesium-based metal is further included. The pretreatment includes the steps of gradually polishing the magnesium-based metal with 600 - 2000 mesh SiC sandpaper, and after polishing, ultrasonically cleaning with water, absolute ethanol, and acetone respectively, and then drying.

[0019] In some embodiments of the present invention, the reflection power of the ion cleaning is 120 - 140 W, preferably 130 W; and / or, the time of the ion cleaning is 5 - 60 s, preferably 5 - 30 s, more preferably 10 - 20 s; and / or, the atmosphere of the ion cleaning is an inert atmosphere.

[0020] In some embodiments of the present invention, the inert atmosphere is an argon atmosphere.

[0021] In some embodiments of the present invention, the fluoro - zirconate solution includes at least one of potassium fluoro - zirconate solution, sodium fluoro - zirconate solution, and ammonium fluoro - zirconate solution.

[0022] In some embodiments of the present invention, the fluoro - zirconate solution is ammonium fluoro - zirconate solution, and the concentration of the ammonium fluoro - zirconate solution is 0.5 - 1.5 mmol / L. For example, it can be any point value among 0.5 mmol / L, 0.7 mmol / L, 0.9 mmol / L, 1.1 mmol / L, 1.3 mmol / L, 1.5 mmol / L, or a range value between any two point values.

[0023] In some embodiments of the present invention, the mass ratio of the semi - finished product to the fluoro - zirconate solution is 1:2 to 1:10. For example, it can be any point value among 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, or a range value between any two point values.

[0024] In some embodiments of the present invention, the temperature of the water bath reaction is 50 - 70 °C, preferably 60 - 70 °C; and / or, the time of the water bath reaction is 5 - 10 min, preferably 10 min.

[0025] In the third aspect of the present invention, there is provided the use of the magnesium-based metal composite material described in the first aspect of the present invention in the preparation of medical implants.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] (1) For the magnesium-based metal composite material provided by the present invention, by introducing zirconia, the magnesium-aluminum layered double hydroxide nanosheets are further densified, thereby improving the density and corrosion resistance. At the same time, the bonding force between the magnesium-aluminum layered double hydroxide nanosheet film layer and the magnesium-based metal is strong and not easily peeled off.

[0028] (2) The present invention uses a low-temperature water bath process to deposit nano-zirconia particles on the surface of magnesium-aluminum layered double hydroxide nanosheets, making the nanosheets further densified. The magnesium-aluminum layered double hydroxide nanosheets fix the nano-zirconia through mechanical riveting action, which not only solves the problem of poor density of the magnesium-aluminum layered double hydroxide nanosheets, but also solves the problems of poor bonding force of the directly deposited zirconia film layer and the easy occurrence of cracks in the zirconia film layer.

[0029] (3) The preparation method of the magnesium-based metal composite material of the present invention has low cost, is easy to mass-produce, and the product quality is controllable. Description of the Drawings

[0030] Figure 1 It is a surface scanning electron microscope test diagram of the magnesium-based metal composite material prepared in Example 1;

[0031] Figure 2 It is a surface scanning electron microscope test diagram of the magnesium-based metal composite material prepared in Example 2;

[0032] Figure 3 It is a surface scanning electron microscope test diagram of the magnesium-based metal composite material prepared in Example 3;

[0033] Figure 4 It is a surface scanning electron microscope test diagram of the magnesium-based metal composite material prepared in Comparative Example 1;

[0034] Figure 5 It is a surface scanning electron microscope test diagram of the magnesium-based metal composite material prepared in Comparative Example 2. Detailed Embodiments

[0035] The content of the present invention will be further described in detail below through specific embodiments. Unless otherwise specified, the raw materials, reagents or devices used in the embodiments can be obtained from conventional commercial channels or can be obtained by existing technical methods. Unless otherwise specified, the test or measurement methods are all conventional methods in the art.

[0036] Example 1

[0037] A magnesium-based metal composite material is prepared by the following preparation method:

[0038] S1. The magnesium-based metal sheet is gradually polished with 600, 1200, and 2000 mesh SiC sandpapers, and after polishing, it is ultrasonically cleaned with deionized water, anhydrous ethanol, and acetone respectively, and then dried in an oven at 45 °C; the magnesium content in the magnesium-based metal sheet is 99.99%.

[0039] S2. The magnesium-based metal sheet treated in S1 is placed in a hydrothermal reaction kettle containing 1 mmol / L aluminum nitrate solution (pH = 10 adjusted with ammonia water), where the mass ratio of the magnesium-based metal sheet to the aluminum nitrate solution is 1:4, the hydrothermal temperature is 120 °C, and the hydrothermal time is 15 hours. After the reaction, it is naturally cooled, taken out of the reaction kettle and cleaned conventionally, and then ultrasonically cleaned with deionized water, anhydrous ethanol, and acetone respectively, and dried in an oven at 45 °C.

[0040] S3. The magnesium-based metal sheet treated in S2 is placed in a plasma cleaner for activation treatment, with a reflection power of 130 W and a time of 20 s, in an argon atmosphere, to obtain a semi-finished product.

[0041] S4. The semi-finished product obtained in S3 is immediately placed in a water bath with 1 mmol / L ammonium hexafluorozirconate solution, where the mass ratio of the semi-finished product to the ammonium hexafluorozirconate solution is 1:2, the water bath temperature is 50 °C, and the time is 5 min. After taking it out of the water bath pot, it is left standing for 10 min, ultrasonically cleaned with deionized water, anhydrous ethanol, and acetone respectively, and dried in an oven at 45 °C to obtain the magnesium-based metal composite material.

[0042] The magnesium-based metal composite material prepared in Example 1 was tested by a scanning electron microscope, and the scanning electron microscope test image of its surface is as Figure 1 shown. It can be seen from Figure 1 that the film layer of the magnesium-based metal composite material prepared in Example 1 has slightly poor compactness and no cracks, which can meet the use requirements.

[0043] Example 2

[0044] A magnesium-based metal composite material is prepared by the following preparation method:

[0045] S1. Gradually polish the magnesium-based metal sheet with 600, 1200, and 2000 mesh SiC sandpaper. After polishing, ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively, and dry it in an oven at 45°C. The magnesium content in the magnesium-based metal sheet is 99.99%.

[0046] S2. Put the magnesium-based metal sheet treated in S1 into a hydrothermal reaction kettle containing 1 mmol / L aluminum nitrate solution (adjusted to pH = 10 with ammonia water). The mass ratio of the magnesium-based metal sheet to the aluminum nitrate solution is 1:4. The hydrothermal temperature is 120°C, and the hydrothermal time is 15 hours. After the reaction, let it cool naturally. After taking it out of the reaction kettle and performing conventional cleaning, ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively, and dry it in an oven at 45°C.

[0047] S3. Place the magnesium-based metal sheet treated in S2 into a plasma cleaner for activation treatment. The reflection power is 130 W, the time is 20 s, and the argon gas atmosphere is used to obtain a semi-finished product.

[0048] S4. Immediately put the semi-finished product obtained in S3 into a 1 mmol / L ammonium hexafluorozirconate solution for water bath. The mass ratio of the semi-finished product to the ammonium hexafluorozirconate solution is 1:2. The water bath temperature is 60°C, and the time is 5 min. After taking it out of the water bath pot, let it stand for 10 min, ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively, and dry it in an oven at 45°C to obtain the magnesium-based metal composite material.

[0049] The magnesium-based metal composite material prepared in Example 2 was tested by a scanning electron microscope, and the scanning electron microscope test image of its surface is as Figure 2 shown. It can be seen from Figure 2 that the film layer of the magnesium-based metal composite material prepared in Example 2 has good compactness and no cracks.

[0050] Example 3

[0051] A magnesium-based metal composite material is prepared by the following preparation method:

[0052] S1. Gradually polish the magnesium-based metal sheet with 600, 1200, and 2000 mesh SiC sandpaper. After polishing, ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively, and dry it in an oven at 45°C. The magnesium content in the magnesium-based metal sheet is 99.99%.

[0053] S2. Put the magnesium-based metal sheet treated in S1 into a hydrothermal reaction kettle containing 1 mmol / L aluminum nitrate solution (adjusted to pH = 10 with ammonia water). The mass ratio of the magnesium-based metal sheet to the aluminum nitrate solution is 1:4. The hydrothermal temperature is 120°C, and the hydrothermal time is 15 hours. After the reaction, let it cool naturally. After taking it out of the reaction kettle and performing conventional cleaning, ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively, and dry it in an oven at 45°C.

[0054] S3. Place the magnesium-based metal sheet after being treated in S2 into a plasma cleaner for activation treatment with a reflection power of 130 W and a time of 20 s under an argon atmosphere to obtain a semi-finished product;

[0055] S4. Immediately put the semi-finished product obtained in S3 into a 1 mmol / L ammonium hexafluorozirconate solution for water bath, where the mass ratio of the semi-finished product to the ammonium hexafluorozirconate solution is 1:2, the water bath temperature is 60 °C, and the time is 10 min. After taking it out of the water bath pot, let it stand for 10 min, and then ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively, and dry it in an oven at 45 °C to obtain the magnesium-based metal composite material.

[0056] The magnesium-based metal composite material prepared in Example 3 was tested by a scanning electron microscope, and the scanning electron microscope test image of its surface is as Figure 3 shown. From Figure 3 it can be seen that the film layer of the magnesium-based metal composite material prepared in Example 3 has excellent compactness and no cracks.

[0057] Example 4

[0058] A magnesium-based metal composite material is prepared by the following preparation method:

[0059] S1. Gradually polish the magnesium-based metal sheet with 600, 1200, and 2000-mesh SiC sandpapers, and ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively after polishing, and dry it in an oven at 45 °C; where the magnesium content in the magnesium-based metal sheet is 99.99%;

[0060] S2. Put the magnesium-based metal sheet after being treated in S1 into a hydrothermal reaction kettle containing a 1 mmol / L aluminum nitrate solution (adjusted to pH = 10 with ammonia water), where the mass ratio of the magnesium-based metal sheet to the aluminum nitrate solution is 1:7, the hydrothermal temperature is 120 °C, and the hydrothermal time is 15 hours. After the reaction, let it cool naturally. After taking it out of the reaction kettle and cleaning it conventionally, then ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively, and dry it in an oven at 45 °C;

[0061] S3. Place the magnesium-based metal sheet after being treated in S2 into a plasma cleaner for activation treatment with a reflection power of 130 W and a time of 5 s under an argon atmosphere to obtain a semi-finished product;

[0062] S4. Immediately put the semi-finished product obtained in S3 into a 1 mmol / L ammonium hexafluorozirconate solution for water bath, where the mass ratio of the semi-finished product to the ammonium hexafluorozirconate solution is 1:8, the water bath temperature is 60 °C, and the time is 10 min. After taking it out of the water bath pot, let it stand for 10 min, and then ultrasonically clean it with deionized water, absolute ethanol, and acetone respectively, and dry it in an oven at 45 °C to obtain the magnesium-based metal composite material.

[0063] The film layer of the magnesium-based metal composite material prepared in Example 4 is excellent in compactness and free of cracks.

[0064] Example 5

[0065] A magnesium-based metal composite material is prepared by the following preparation method:

[0066] S1. Gradually polish the magnesium-based metal sheet with 600, 1200, and 2000 mesh SiC sandpapers, and after polishing, ultrasonically clean with deionized water, anhydrous ethanol, and acetone respectively, and dry in an oven at 45 °C; the magnesium content in the magnesium-based metal sheet is 99.99%;

[0067] S2. Put the magnesium-based metal sheet treated in S1 into a hydrothermal reaction kettle containing 1 mmol / L aluminum nitrate solution (pH = 10 adjusted with ammonia water), where the mass ratio of the magnesium-based metal sheet to the aluminum nitrate solution is 1:8, the hydrothermal temperature is 120 °C, the hydrothermal time is 15 hours, naturally cool after the reaction, take it out of the reaction kettle for conventional cleaning, and then ultrasonically clean with deionized water, anhydrous ethanol, and acetone respectively, and dry in an oven at 45 °C;

[0068] S3. Activate the magnesium-based metal sheet treated in S2 with a plasma cleaner, with a reflection power of 130 W and a time of 40 s, in an argon atmosphere to obtain a semi-finished product;

[0069] S4. Immediately put the semi-finished product prepared in S3 into a 1 mmol / L ammonium hexafluorozirconate solution for water bath, where the mass ratio of the semi-finished product to the ammonium hexafluorozirconate solution is 1:10, the water bath temperature is 60 °C, and the time is 10 min. After taking it out of the water bath pot, let it stand for 10 min, ultrasonically clean with deionized water, anhydrous ethanol, and acetone respectively, and dry in an oven at 45 °C to obtain the magnesium-based metal composite material.

[0070] The film layer of the magnesium-based metal composite material prepared in Example 5 is slightly poor in compactness and free of cracks, which can meet the use requirements.

[0071] Comparative Example 1

[0072] The difference from Example 3 is only that Comparative Example 1 is prepared by using steps S1 and S2 without ion cleaning and water bath reaction.

[0073] The magnesium-based metal composite material prepared in Comparative Example 1 was tested by a scanning electron microscope, and the scanning electron microscope test image of its surface is as Figure 4 shown. It can be seen from Figure 4 that although the film layer of the magnesium-based metal composite material prepared in Comparative Example 1 has no cracks, its compactness is very poor and it cannot meet the use requirements.

[0074] Comparative Example 2

[0075] The difference from Example 3 is only that in Comparative Example 2, the water bath time in Step S4 was adjusted to 20 min.

[0076] The magnesium-based metal composite material prepared in Comparative Example 2 was tested using a scanning electron microscope, and the scanning electron microscope test image of its surface is as Figure 5 shown. It can be seen from Figure 5 that the film layer of the magnesium-based metal composite material prepared in Comparative Example 2 is very poor in denseness and has cracks.

[0077] Comparative Example 3

[0078] The difference from Example 3 is only that in Comparative Example 3, AZ31 magnesium alloy (magnesium content < 99.99%) was selected as the magnesium-based metal sheet.

[0079] The film layer of the magnesium-based metal composite material prepared in Comparative Example 3 is very poor in denseness and has cracks.

[0080] Product performance test

[0081] The magnesium-based metal composite materials prepared in Examples 1-5 and Comparative Examples 1-3 were used as test samples for the following tests.

[0082] (1) Electrochemical test: The film layer was measured using a Tafel curve test. The test was carried out in a three-electrode system, which consisted of a rectangular platinum counter electrode, a saturated calomel electrode as the reference electrode, and a working electrode exposed in a 1 cm area to form a stable system. The working electrode was immersed in SBF simulated body fluid. The corrosion current density was obtained by the cathodic extrapolation method. The lower the corrosion current density value, the better the corrosion resistance.

[0083] (2) Film layer bonding strength test: Appropriate fixtures were selected, and the sample was fixed on an electronic universal testing machine using a peeling fixture. The electronic universal testing machine was started, the peeling test mode was selected, a peeling force was applied between the film layer and the substrate, and the load was gradually increased until the film layer peeled off, and the load value at which the failure occurred was recorded.

[0084] The test results are shown in Table 1.

[0085] Table 1

[0086]

[0087] As can be seen from Table 1, the corrosion current density of the magnesium-based metal composite materials prepared in Examples 1-5 is significantly smaller than that of Comparative Examples 1-3, indicating that the products of the examples of the present invention have better denseness and significantly better corrosion resistance.

[0088] Compared with other examples, Example 3 optimized the preparation process parameters, and the comprehensive performance of the products prepared thereby was further improved.

[0089] The preferred embodiments of the present invention have been specifically described above. However, the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A magnesium-based metal composite material, characterized in that: The magnesium-based metal composite material comprises a magnesium-based metal and a magnesium-aluminum layered double metal hydroxide nanosheet located on the surface of the magnesium-based metal, wherein the magnesium-aluminum layered double metal hydroxide nanosheet contains zirconium oxide; The magnesium-based metal is a magnesium-based metal with a magnesium content of ≥ 99.99%; The magnesium-based metal composite material is prepared by a preparation method comprising the following steps: The magnesium-based metal and aluminum salt solution are mixed, subjected to a hydrothermal reaction, and magnesium-aluminum layered double hydroxide nanosheets are generated in situ, and then ion cleaning is performed to obtain a semi-finished product; The semi-finished product is mixed with a fluorozirconate solution, reacted in a water bath to generate zirconium oxide, and a magnesium-based metal composite material is obtained; The temperature of the water bath reaction is 50-70°C, and the time of the water bath reaction is 5-10min; The pH of the hydrothermal reaction is 9-11, the temperature of the hydrothermal reaction is 110-130° C., and the time of the hydrothermal reaction is 14-16 hours; The mass ratio of the magnesium-based metal to the aluminum salt solution is 1:3 to 1:12; The mass ratio of the semi-finished product to the fluorozirconate solution is 1:2 to 1:

10.

2. The magnesium-based metal composite material according to claim 1, characterized in that: The magnesium-aluminum layered double metal hydroxide nanosheet is a single-layer structure.

3. The magnesium-based metal composite material according to claim 1, characterized in that: The aluminum salt solution includes at least one of an aluminum nitrate solution, an aluminum chloride solution and an aluminum sulfate solution.

4. The magnesium-based metal composite material according to claim 1, characterized in that: The reflected power of the ion cleaning is 120-140W; and / or, the time of the ion cleaning is 5-60s; and / or, the atmosphere of the ion cleaning is an inert atmosphere.

5. The magnesium-based metal composite material according to claim 1, characterized in that: The fluorozirconate solution includes at least one of a potassium fluorozirconate solution, a sodium fluorozirconate solution and an ammonium fluorozirconate solution.

6. Use of the magnesium-based metal composite material according to any one of claims 1 to 5 in the preparation of medical implants.

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