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

A corrosion protection, magnesium metal technology, applied in metal material coating process, coating, pharmaceutical formulations, etc., can solve the problems of corrosion damage of magnesium and magnesium alloys, mechanical performance failure of implant materials, etc., to slow down corrosion and promote biological Compatibility, active site reduction effect

Active Publication Date: 2017-09-01
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 layer with corrosion protection function on surface of magnesium metal
  • Method for constructing tartaric acid coating layer with corrosion protection function on surface of magnesium metal
  • Method for constructing tartaric acid coating layer with corrosion protection function on surface of magnesium metal

Examples

Experimental program
Comparison scheme
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 layer with a corrosion protection function on the surface of magnesium metal. The method comprises the following steps: A. polishing and carrying out ultrasonic cleaning on a pickling solution; B. soaking the magnesium metal obtained in the step A in NaOH solution with a concentration of 3mol / L, placing the NaOH solution in a water bath environment at 50-70 DEG C, standing for 11-14h, carrying out alkaline activation pre-treatment, then thoroughly washing the magnesium metal, and then drying the magnesium metal; C. preparing a tartaric acid solution with a concentration of 5-25g / L, and adjusting the pH value of the tartaric acid solution to achieve 5-9 by virtue of NaOH with a concentration of 1mol / L; and D. soaking the magnesium metal obtained in the step B in the tartaric acid solution prepared in the step C, placing the tartaric acid solution in a water bath environment at 30-80 DEG C, standing for 3-12h, then taking out the magnesium metal and thoroughly washing the magnesium metal by virtue of deionized water, and carrying out vacuum drying; and the tartaric acid coating layer with the corrosion protection function is successfully constructed on the surface of the magnesium metal. After the surface of the magnesium metal is modified through the method, the corrosion speed of a corrosive environment for the magnesium metal can be much effectively controlled, so that the corrosion-degradation period of the magnesium metal is matched with the treatment-recovery period of organisms when the magnesium metal is used as a biodegradable medical material.

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 Applications(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
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