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Solution formula and process of preparing tantalum-containing coating on magnesium and magnesium alloy surface by micro-arc oxidation

A micro-arc oxidation and magnesium alloy technology, applied in the direction of surface reaction electrolytic coating, coating, anodic oxidation, etc., can solve the problems of loss of mechanical properties, unsatisfactory biocompatibility, poor corrosion resistance, etc., and achieve good Effects of osteoconductivity, good osteoinductive activity, and simple equipment

Active Publication Date: 2019-08-16
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In summary, the main problems in the prior art are: 1. The corrosion resistance of magnesium matrix materials is poor, and the mechanical properties are lost due to corrosion before the bone is not healed; 2. Magnesium alloys formed after magnesium and other metals are alloyed The corrosion resistance of the material has been greatly improved compared with pure magnesium materials, but as a bioimplantable material, its biocompatibility performance is not ideal

Method used

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  • Solution formula and process of preparing tantalum-containing coating on magnesium and magnesium alloy surface by micro-arc oxidation
  • Solution formula and process of preparing tantalum-containing coating on magnesium and magnesium alloy surface by micro-arc oxidation
  • Solution formula and process of preparing tantalum-containing coating on magnesium and magnesium alloy surface by micro-arc oxidation

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Embodiment 1

[0044] The tantalum-containing coatings on the surface of magnesium and magnesium alloys were prepared by micro-arc oxidation.

[0045] Such as Figure 5 As shown in the process flow chart, this embodiment is carried out according to the following steps: 1. After polishing the magnesium-aluminum alloy sample with 200#, 600#, 1200# and 1500# sandpaper, it is washed in cold water, soaked in acetone for 5 minutes to remove oil, and anhydrous Ultrasonic cleaning with ethanol for 5 minutes, then blow dry for use; 2. Prepare micro-arc oxidation solution: containing 8g / L sodium silicate, 6g / L trisodium phosphate, 1g / L sodium hydroxide, 5ml / L ethanol For tantalum, the solvent is distilled water, and the prepared solution is stirred evenly with a glass rod; 3. Connect the sample to the anode of the micro-arc oxidation equipment, use a stainless steel sheet as the cathode, and adopt a large cathode and small anode structure (cathode area: anode area ≥ 2 ︰1); 4. Put the connected cathod...

Embodiment 2

[0049]The tantalum-containing coatings on the surface of magnesium and magnesium alloys were prepared by micro-arc oxidation.

[0050] Such as Figure 5 As shown in the process flow chart, this embodiment is carried out according to the following steps: 1. The magnesium alloy sample is washed in cold water after being polished by 200#, 600#, 1200# and 1500# sandpaper successively, soaked in acetone for 5min to remove oil, and degreased in absolute ethanol Ultrasonic cleaning for 10 minutes, then blow dry for use; 2. Prepare micro-arc oxidation solution: 9g / L sodium silicate, 7g / L trisodium phosphate, 1.5g / L sodium hydroxide, 7.5ml / L tantalum ethoxide , the solvent is distilled water, and the prepared solution is stirred evenly with a glass rod; 3. Connect the sample to the anode of the micro-arc oxidation equipment, use a stainless steel sheet as the cathode, and adopt a large cathode and small anode structure (cathode area: anode area ≥ 2: 1); 4. Put the connected cathode an...

Embodiment 3

[0053] The tantalum-containing coatings on the surface of magnesium and magnesium alloys were prepared by micro-arc oxidation.

[0054] Such as Figure 5 As shown in the process flow chart, this embodiment is carried out according to the following steps: 1. The magnesium alloy sample is washed in cold water after being polished by 200#, 600#, 1200# and 1500# sandpaper successively, soaked in acetone for 5min to remove oil, and degreased in absolute ethanol Ultrasonic cleaning for 10 minutes, then blow dry for use; 2. Prepare micro-arc oxidation solution: 10g / L sodium silicate, 8g / L trisodium phosphate, 2g / L sodium hydroxide, 10ml / L tantalum ethoxide, solvent It is distilled water, and the prepared solution is stirred evenly with a glass rod; 3. Connect the sample to the anode of the micro-arc oxidation equipment, use a stainless steel sheet as the cathode, and adopt a large cathode and small anode structure (cathode area: anode area ≥ 2: 1) ; 4. Put the connected cathode and ...

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Abstract

The invention belongs to the technical field of metal material surface engineering and in particular relates to a solution formula for preparing a tantalum-containing coating on surfaces of magnesium and a magnesium alloy by micro-arc oxidation and a process. The invention discloses a solution formula which comprises sodium silicate, trisodium phosphate, sodium hydroxide, tantalum ethoxide and water. Tantalum ethoxide in the formula can be replaced by tantalum oxalate and water is a solvent. The invention also discloses a preparation process of the coating. The preparation process comprises the following steps of: grinding a specimen with abrasive paper, cleaning the specimen with cold water, performing deoiling with acetone and performing ethanol ultrasonic washing; then preparing a solution; then connecting the specimen with an anode of micro-arc oxidation equipment, wherein a stainless steel sheet is taken as a cathode; putting the cathode and the anode in the prepared solution; drying and stirring the solution; starting the micro-arc oxidation equipment; shutting down the micro-arc oxidation equipment after the coating is prepared; and unloading, cleaning and drying the specimen. The coating is good in binding force and uniform in tissue, and the corrosion resistance of magnesium and the magnesium alloy can be improved and the biocompatibility of the coating can be also improved. Equipment needed for preparing the coating is simple, and the process is stable and reliable and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of metal material surface engineering, and in particular relates to a solution formulation and a process for preparing a tantalum-containing coating on the surface of magnesium and magnesium alloys by micro-arc oxidation. Background technique [0002] Traditional biomaterials, mainly stainless steel and titanium alloys, have played a great role in the development of modern orthopedic internal fixation implant materials. However, the traditional orthopedic implant materials produce stress shielding after implantation in the body, which hinders fracture healing; secondary surgery is required to remove the fracture after healing; and the material is prone to refracture after removal, prompting people to look for possible alternatives. Magnesium-based biomaterials have become a research hotspot due to their good metal properties, mechanical properties and degradability (body absorption, no need for secondary sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/30
CPCC25D11/026C25D11/30
Inventor 李涌泉刘广君陈洋耿桂宏侯俊峰蒋亮
Owner BEIFANG UNIV OF NATITIES
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