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Permanent magnet with corrosion resistant coating and powder nanometer spraying method thereof

A technology of anti-corrosion coating and permanent magnet, which is applied in the field of surface chemical treatment of materials, and can solve problems that affect the service life of NdFeB permanent magnets, poor corrosion resistance of NdFeB alloys, and reduce product stability and reliability. , to achieve the effect of reducing production investment cost, ensuring safe production and prolonging service life

Active Publication Date: 2010-06-09
BEIJING ZHONG KE SAN HUAN HI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rare earth element neodymium in the NdFeB powder alloy is active in nature, which makes the corrosion resistance of the entire NdFeB alloy very poor. It is easy to rust and corrode in a hot and humid environment, and the magnetic properties will be reduced or damaged due to corrosion failure. , which seriously affects the service life of NdFeB permanent magnets and reduces the stability and reliability of the product

Method used

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  • Permanent magnet with corrosion resistant coating and powder nanometer spraying method thereof
  • Permanent magnet with corrosion resistant coating and powder nanometer spraying method thereof

Examples

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Effect test

Embodiment 1

[0032] Choose 70*25*10 materials, chamfering and polishing: use mechanical vibration grinding and rolling chamfering method to polish sintered NdFeB permanent magnet materials; degreasing and degreasing: adding sodium phosphate, sodium carbonate or sodium hydroxide Carry out degreasing and degreasing; sandblasting and derusting; spray primer layer: on the surface of the permanent magnet, spray a kind of 0.5 micron thick hydroxyacrylic resin bottom layer with spray gun. Sensitization and activation treatment: Spray the surface sensitization activation solution on the surface of the article sprayed with the primer layer until the surface of the article is completely wet, and then rinse the article with pure aqueous solution; the surface sensitization activation solution contains hydroxyl 15 g / L of stannous alkyl sulfonate, 15 g / L of palladium chloride, and a transition layer thickness of 0.1 microns. Spraying the outermost layer with a spray gun: spray A agent and B agent to the...

Embodiment 2

[0034] Choose 70*25*10 materials, chamfering and polishing: adopt mechanical vibration grinding and rolling chamfering method to polish the bonded NdFeB permanent magnet material; degreasing and degreasing: adding sodium phosphate, sodium carbonate or hydroxide Sodium for degreasing and degreasing; sand blasting for rust removal; spraying primer layer: on the surface of the permanent magnet, spray a 2 micron thick epoxy resin primer layer on the surface of the permanent magnet. Sensitization and activation treatment: Spray the surface sensitization activation solution on the surface of the article sprayed with the primer layer until the surface of the article is completely wet, and then rinse the article with pure aqueous solution; the surface sensitization activation solution contains hydroxyl 25 g / L of stannous alkyl sulfonate, 5 g / L of palladium chloride, and a transition layer thickness of 0.3 microns. Spraying the outermost layer with a spray gun: spray A agent and B agen...

Embodiment 3

[0036]Choose 70*25*10 materials, chamfering and polishing: use mechanical vibration grinding and rolling chamfering method to polish sintered NdFeB permanent magnet materials; degreasing and degreasing: adding sodium phosphate, sodium carbonate or sodium hydroxide Degreasing and degreasing; sand blasting and rust removal; spraying primer layer: on the surface of the permanent magnet, spray a 1 micron thick hydroxyacrylic resin bottom layer with a spray gun. Sensitization and activation treatment: Spray the surface sensitization activation solution on the surface of the article sprayed with the primer layer until the surface of the article is completely wet, and then rinse the article with pure aqueous solution; the surface sensitization activation solution contains hydroxyl 20 g / L of stannous alkyl sulfonate, 10 g / L of palladium chloride, and a thickness of 0.2 microns in the transition layer. Spraying the outermost layer with a spray gun: spray A agent and B agent on the surf...

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Abstract

The invention provides a permanent magnet with a corrosion resistant coating. The permanent magnet comprises a permanent magnetic material base body 1, an organic matter bottom layer 2, an organic matter transition layer 3 and a nanometer silver layer 4, and also comprises a powder nanometer spraying method for the permanent magnet with the corrosion resistant coating. As the metal base body is isolated from the contacted outside corrosion media through the inner and outer alloy layers, the metal base body is difficult to corrode and has good humidity and heat resistance property, and then the service life of the permanent magnet is prolonged. As the coating is thin, the influence on the magnet is small, and the magnet shielding does not exist. The product investment cost is reduced, and the safety production is ensured.

Description

technical field [0001] The invention relates to the field of surface chemical treatment of materials, in particular to the nano-spraying technology of NdFeB permanent magnet materials. Specifically, the invention relates to a surface treatment method for permanent magnet materials using the nano-spraying technology. Background technique [0002] In recent years, the application and development of neodymium iron boron (NdFeB) permanent magnet materials is very rapid, and the success of the protection of NdFeB permanent magnet materials is related to one of the key technologies whether the material can be popularized and applied. The material is mainly made of rare earth metals such as neodymium Nd, iron and boron through powder metallurgy process. As the strongest magnetic material at present, it has been widely used in electroplating devices, machinery, medical treatment, automobiles and other fields, and its application prospects are very broad. [0003] The premise of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02C23C28/00C23C18/16B05D1/38
Inventor 白晓刚潘广麾
Owner BEIJING ZHONG KE SAN HUAN HI TECH
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