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A kind of bio-magnesium alloy whose surface is coated with magnesium sodium fluoride film and its preparation method

A magnesium sodium fluoride film, surface coating technology, applied in chemical instruments and methods, metal layered products, metal material coating technology and other directions, can solve the problem of thick magnesium fluoride film with long process time and insufficient corrosion resistance and other problems, to achieve the effect of short preparation time, prolonged corrosion resistance time and convenient operation

Active Publication Date: 2015-12-09
江苏凯晞投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005]Technical problems to be solved: In view of the insufficient corrosion resistance of magnesium alloys in the biomedical field as an implanted metal material and the preparation of thicker magnesium fluoride films For the problem of too long time, the present invention provides a bio-magnesium alloy whose surface is coated with a magnesium-sodium fluoride film and a preparation method thereof

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  • A kind of bio-magnesium alloy whose surface is coated with magnesium sodium fluoride film and its preparation method
  • A kind of bio-magnesium alloy whose surface is coated with magnesium sodium fluoride film and its preparation method
  • A kind of bio-magnesium alloy whose surface is coated with magnesium sodium fluoride film and its preparation method

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Embodiment 1

[0023] A method for preparing a bio-magnesium alloy whose surface is coated with a magnesium-sodium-fluoride film, firstly immersing a degreasing and water-washed Mg-Nd-Zn-Zr magnesium alloy sample in a solution of 80°C, sodium fluoride and hydrofluoric acid After reacting for 30 minutes in the treatment solutions with molar concentrations of 1.6mol / L and 4.8mol / L, the samples were taken out, washed with water and alcohol, and dried in the air.

[0024] as attached figure 1 As shown, the morphology observation of the sodium magnesium fluoride film on the surface of the biological magnesium alloy sample with a scanning electron microscope shows that the sodium magnesium fluoride film is composed of approximately cubic sodium magnesium fluoride particles, and the sodium magnesium fluoride particles have a two-dimensional shape. There are two growth mechanisms of nuclear step growth and helical growth. The average edge length of sodium magnesium fluoride particles is about 2 μm,...

Embodiment 2

[0029] A method for preparing a bio-magnesium alloy whose surface is coated with a magnesium-sodium-fluoride film, firstly immersing a degreasing and water-washed Mg-Nd-Zn-Zr magnesium alloy sample in a solution of 80°C, sodium fluoride and hydrofluoric acid After reacting for 10 minutes in the treatment solutions with molar concentrations of 1.6mol / L and 4.8mol / L, the samples were taken out, washed with water and alcohol, and then dried in the air.

[0030] as attached image 3 As shown, the immersion test in SBF solution shows that the sodium magnesium fluoride film can significantly reduce the hydrogen evolution rate of the matrix magnesium alloy.

[0031] The observation of the sodium magnesium fluoride film on the surface of the biological magnesium alloy sample with a scanning electron microscope shows that the sodium magnesium fluoride film is composed of sodium magnesium fluoride particles that are approximately cubic, and the average edge length of the sodium magnesiu...

Embodiment 3

[0033] A method for preparing a bio-magnesium alloy whose surface is coated with a magnesium-sodium-fluoride film, firstly immersing a degreasing and water-washed Mg-Nd-Zn-Zr magnesium alloy sample in a solution of 80°C, sodium fluoride and hydrofluoric acid After reacting for 60 minutes in the treatment solutions with molar concentrations of 1.6mol / L and 4.8mol / L, the samples were taken out, washed with water and alcohol, and dried in the air.

[0034] Observation of the morphology of the sodium magnesium fluoride film on the surface of the biological magnesium alloy sample with a scanning electron microscope shows that the sodium magnesium fluoride film is composed of approximately cubic sodium magnesium fluoride particles. Potassium permanganate (0.5 g / L) and Nitric acid (30 ml / L) solution titration shows that its discoloration time is 5.3 times that of the matrix magnesium alloy.

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Abstract

The invention relates to a biomagnesium alloy whose surface is coated with a magnesium sodium fluoride film and a preparation method thereof. The surface of the biomagnesium alloy is covered with a layer of magnesium sodium fluoride film. The preparation method comprises alkaline degreasing, washing with water, preparing The steps of sodium magnesium fluoride film, water washing, alcohol washing and drying, the specific method of preparing sodium magnesium fluoride film is to immerse the biological magnesium alloy at a temperature of 75 ° C to 90 ° C, and the molar concentrations of sodium fluoride and hydrofluoric acid are respectively In the 1.6mol / L and 4.8mol / L treatment solution, after 10min to 90min of heat preservation, the bio-magnesium alloy was taken out. The invention provides a bio-magnesium alloy whose surface is coated with a sodium magnesium fluoride film. The sodium magnesium fluoride film has the characteristics of simple preparation process, convenient operation, and suitability for industrial production, and can be used for surface modification coating of magnesium alloys. layer, the bio-magnesium alloy can be used to prepare bio-magnesium alloy devices.

Description

technical field [0001] The invention relates to the technical field of biomaterials, and is particularly suitable for the field of surface modification of biomagnesium alloy devices, in particular to a biomagnesium alloy whose surface is coated with a magnesium sodium fluoride film and a preparation method thereof. Background technique [0002] Magnesium is an essential constant element for the human body. Magnesium alloys are biodegradable, dense (1.74g.cm -3 ) and human bone (1.75g.cm -3 ), Young's modulus (45GPa) close to that of human bone (20GPa), high specific strength and specific stiffness, etc., it is a metal material with broad application prospects in biological implant devices such as bone plates, bone nails, and vascular stents. However, due to the high chemical activity of magnesium, the corrosion resistance of magnesium alloys is poor. On the one hand, the service life of magnesium alloy biological implants does not match its expected service life. Alkalizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/34B32B15/04C22C23/00A61L27/30A61L31/08
Inventor 方信贤章晓波王强王章忠
Owner 江苏凯晞投资有限公司
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