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Method for constructing tartaric acid coating with corrosion protection on magnesium metal surface

A corrosion protection, magnesium metal technology, applied in the direction of metal material coating process, coating, pharmaceutical formulation, etc., can solve the problems of mechanical property failure of implant materials, corrosion damage of magnesium and magnesium alloys, etc., to promote biocompatibility , Corrosion mitigation, coating densification effect

Active Publication Date: 2019-05-17
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the active chemical properties of magnesium, magnesium and magnesium alloys are easily corroded and damaged by the environment during service. Excessive corrosion rates and severe localized corrosion will cause premature failure of the mechanical properties of implanted materials and bring major risks to surgery.

Method used

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  • Method for constructing tartaric acid coating with corrosion protection on magnesium metal surface
  • Method for constructing tartaric acid coating with corrosion protection on magnesium metal surface
  • Method for constructing tartaric acid coating with corrosion protection on magnesium metal surface

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A method for constructing a tartaric acid coating with corrosion protection on the surface of pure magnesium, the steps of which are:

[0022] A. Put pure magnesium into Mg(NO 3 ) 2 , 22g / L HNO 3 and 300g / L ethanol pickling solution, ultrasonic cleaning for one minute, then remove the pure magnesium and rinse it with deionized water;

[0023] B. Immerse the pure magnesium obtained in step A in a 3mol / L NaOH solution, and place it in a water bath at 60°C for 12 hours for alkali activation pretreatment, then take out the pure magnesium and rinse it with deionized water repeatedly and dry it ;

[0024] C, prepare the tartaric acid solution of 5g / L, adjust solution pH to 5 with 1mol / L NaOH;

[0025] D. Immerse the pure magnesium obtained in step B in the tartaric acid solution prepared in step C, and place it in a water bath environment at 60°C for 12 hours, then take out the pure magnesium and rinse it with deionized water repeatedly, and dry it in vacuum; A tartaric ...

Embodiment 2

[0029] A method for constructing a tartaric acid coating with corrosion protection on the surface of a magnesium alloy, the steps of which are:

[0030] A. Put the magnesium alloy into the Mg(NO 3 ) 2 , 22g / L HNO 3 and 300g / L ethanol pickling solution, ultrasonic cleaning for one minute, then remove the magnesium alloy and rinse it with deionized water;

[0031] B. Immerse the magnesium alloy obtained in step A in a 3mol / L NaOH solution, and place it in a water bath at 50°C for 11 hours, perform alkali activation pretreatment, then take out the magnesium alloy and rinse it repeatedly with deionized water and dry it ;

[0032] C, prepare the tartaric acid solution of 15g / L, adjust solution pH to 7 with 1mol / L NaOH;

[0033] D. Immerse the magnesium alloy obtained in step B in the tartaric acid solution prepared in step C, and place it in a water bath environment at 30°C for 6 hours, then take out the magnesium alloy and rinse it repeatedly with deionized water, and dry it i...

Embodiment 3

[0035] A method for constructing a nano-capacity structure on the surface of pure magnesium and covering functional molecules, the steps of which are:

[0036] A. Put pure magnesium into Mg(NO 3 ) 2 , 22g / L HNO 3 and 300g / L ethanol pickling solution, ultrasonic cleaning for one minute, then remove the pure magnesium and rinse it with deionized water;

[0037] B. Immerse the pure magnesium obtained in step A in 3mol / L NaOH solution, and place it in a water bath environment at 70°C for 14 hours, perform alkali activation pretreatment, then take out the pure magnesium and rinse it with deionized water repeatedly and dry it ;

[0038] C, the tartaric acid solution of preparation 25g / L, regulate solution pH to 9 with 1mol / L NaOH;

[0039] D. Immerse the pure magnesium obtained in step B in the tartaric acid solution prepared in step C, and place it in a water bath environment at 80°C for 3 hours, then take out the pure magnesium and rinse it repeatedly with deionized water, and...

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Abstract

The invention discloses a method for constructing a tartaric acid coating with a corrosion protection effect on the surface of magnesium metal. The steps are: A, grinding, ultrasonic cleaning with pickling solution; B, immersing the magnesium metal obtained in step A in a concentration of 3mol / L of NaOH solution, and placed in a water bath environment of 50-70 ° C, placed for 11-14h, alkali activation pretreatment, then rinsed and dried; C, preparation of 5-25g / L tartaric acid solution, with 1mol / L NaOH to adjust the pH to 5-9; D. Immerse the magnesium metal obtained in step B in the tartaric acid solution prepared in step C, and place it in a water bath at 30-80°C for 3-12 hours, then take out the magnesium The metal was rinsed with deionized water and dried in vacuum; that is, a tartaric acid coating with corrosion protection was successfully constructed on the surface of magnesium metal. After using this method to modify the surface of magnesium metal, the corrosion rate of magnesium metal in a corrosive environment can be more effectively controlled, so that when magnesium metal is used as a biomedical degradable material, its corrosion degradation matches the treatment recovery period of the organism.

Description

technical field [0001] The invention relates to a surface modification method for magnesium-based materials, in particular to a surface modification method for constructing a tartaric acid coating with corrosion protection on the surface of magnesium metal. Background technique [0002] As one of the most abundant elements in the earth's crust, magnesium has become an attractive metal material since the end of the 20th century due to its mechanical properties such as low density, high strength, strong wear resistance, high ductility and toughness. Among them, in the field of biomedical materials, magnesium metal has become the most potential biodegradable implant material due to its excellent mechanical properties, elastic modulus similar to human bone, good degradability and biocompatibility, especially in bone It has great application prospects in implant materials and cardiovascular stent materials. [0003] However, due to the active chemical properties of magnesium, ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/60C23C22/83A61L31/14A61L31/08A61L31/02
CPCA61L31/022A61L31/08A61L31/14A61L2400/18C23C22/60C23C22/83
Inventor 万国江李薇陈英奇张文泰黄楠
Owner SOUTHWEST JIAOTONG UNIV