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Preparation method and detection method of corrosion-resistant medical magnet

A corrosion resistance and detection method technology, applied in the fields of weather resistance/light resistance/corrosion resistance, inductor/transformer/magnet manufacturing, permanent magnet, etc. Corrosion and other issues to achieve the effect of avoiding medical risks, good biocompatibility, and improving corrosion resistance

Inactive Publication Date: 2020-12-01
XIAN MAGNETIC MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the coating of magnets is metal coating including nickel, zinc, titanium nitride, etc., but it has a lot to do with the protection time and the environment in which the magnet is used. The magnet is easily corroded in body fluids such as bile and gastric juice, so the existing magnets cannot Remains in the body for a long time, making most operations difficult

Method used

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  • Preparation method and detection method of corrosion-resistant medical magnet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of corrosion-resistant medical magnet of the present invention, it comprises the steps:

[0031] 1) Choose a ring-shaped unmagnetized N45 NdFeB as the magnet body, and round the corners of the magnet body;

[0032] 2) Soak the above-mentioned rounded magnet body in an acid solution for pickling, remove the rust on the surface of the magnet and take it out;

[0033] 3) Utilize physical vapor deposition to form a coating layer on the surface of the magnet body in step 2), to obtain a coating magnet; the coating layer is a 10um parylene coating;

[0034] 4) After the coated magnet is cooled, magnetize it with a magnetizer to obtain a corrosion-resistant medical magnet.

Embodiment 2

[0036] A kind of preparation method of corrosion-resistant medical magnet of the present invention, it comprises the steps:

[0037] 1) Choose a ring-shaped unmagnetized N45 NdFeB as the magnet body, and round the corners of the magnet body;

[0038] 2) Soak the above-mentioned rounded magnet body in an acid solution for pickling, remove the rust on the surface of the magnet and take it out;

[0039] 3) Utilize physical vapor deposition to form a coating layer on the surface of the magnet body in step 2), to obtain a coating magnet; the coating layer is a 25um parylene coating;

[0040] 4) After the coated magnet is cooled, magnetize it with a magnetizer to obtain a corrosion-resistant medical magnet.

Embodiment 3

[0042] A kind of preparation method of corrosion-resistant medical magnet of the present invention, it comprises the steps:

[0043] 1) Choose a ring-shaped unmagnetized N45 NdFeB as the magnet body, and round the corners of the magnet body;

[0044] 2) Soak the above-mentioned rounded magnet body in an acid solution for pickling, remove the rust on the surface of the magnet and take it out;

[0045] 3) Utilize physical vapor deposition to form a coating layer on the surface of the magnet body in step 2), to obtain a coating magnet; the coating layer is a 30um parylene coating;

[0046] 4) After the coated magnet is cooled, magnetize it with a magnetizer to obtain a corrosion-resistant medical magnet.

[0047] As the best embodiment, a method for preparing a corrosion-resistant medical magnet of the present invention, the coating layer is a 25um parylene coating, and parylene C powder is selected as the coating raw material.

[0048] As the best embodiment, a kind of prepara...

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Abstract

The invention discloses a preparation and detection method of a corrosion-resistant medical magnet. The method comprises the following steps: filleting corners of a neodymium-iron-boron body, and coating the outer surface of the neodymium-iron-boron body with a protective coating; the protective coating being a parylene coating with a thickness of 25 [mu]m; the magnet being not magnetized and plated during machining, and after coating machining is completed, the magnet being magnetized again; and finally, soaking in a bile and gastric juice mixed solution to detect the corrosion resistance. According to the present invention, the short-term implantation requirement can be met, and the coating meets the biocompatibility requirement, and can be directly used for the human body.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a preparation and detection method of a corrosion-resistant medical magnet. Background technique [0002] Magnetic surgery (Magnetic Surgery, MS) is the use of specially designed magnetic medical devices or equipment to convert the "non-contact" magnetic field force between magnetic substances into a force that can perform specific functions in clinical diagnosis and treatment, thereby completing tissue crushing and organ anchoring. , luminal navigation, gap expansion, controllable tracing and other functions of emerging comprehensive technical disciplines. [0003] After the continuous growth of magnetic surgery, the clinical application of magnetic has been recognized by relevant expert institutions. The next step of protection and safety of magnets is the most difficult problem in the development of magnetic surgery at this stage. [0004] If the magnet is applied ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02H01F1/057H01F13/00H01F41/02G01N17/00G01N3/00G01B21/00
CPCH01F7/0221H01F41/026H01F1/057H01F13/003G01N17/00G01N3/00G01B21/00
Inventor 吕毅汤博钱旦韩力王晓洁
Owner XIAN MAGNETIC MEDICAL TECH CO LTD
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