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A method for enhancing the anticorrosion performance of NdFeB permanent magnets

A permanent magnet, NdFeB technology, applied in the field of enhancing the anti-corrosion performance of NdFeB permanent magnets, can solve the problems of high porosity, poor anti-corrosion, affecting the use effect, etc., and achieve the effect of reducing porosity and enhancing anti-corrosion performance

Active Publication Date: 2016-06-29
HUBEI SUNSHORE SOLAR ENERGY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned problem that the present invention needs to solve is to aim at above-mentioned prior art coating layer is thin, porosity is high, corrosion resistance is poor; And the method of enhancing the anti-corrosion performance of NdFeB permanent magnets with strong anti-corrosion performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for enhancing the anti-corrosion performance of NdFeB permanent magnets, comprising the following steps:

[0019] The first step: pre-treatment, degreasing and rinsing the NdFeB permanent magnet;

[0020] The second step: electroplating a metal nickel film layer, and plating a layer of metal nickel film layer on the surface of the NdFeB permanent magnet;

[0021] The third step: coating a layer of silicon dioxide film on the surface of the metal nickel film layer.

[0022] The method for enhancing the anti-corrosion performance of NdFeB permanent magnets, the pre-treatment process is to first use acetone solution to ultrasonically clean the NdFeB permanent magnets for 20 minutes, take them out and then use absolute ethanol to ultrasonically clean them for 10 minutes, and dry them for later use. .

[0023] The method for enhancing the anti-corrosion performance of NdFeB permanent magnets, the processing technology of electroplating the metal nickel film layer ...

Embodiment 2

[0028] A method for enhancing the anti-corrosion performance of NdFeB permanent magnets, comprising the following steps:

[0029] The first step: pre-treatment, degreasing and rinsing the NdFeB permanent magnet;

[0030] The second step: electroplating a metal nickel film layer, and plating a layer of metal nickel film layer on the surface of the NdFeB permanent magnet;

[0031] The third step: coating a layer of silicon dioxide film on the surface of the metal nickel film layer.

[0032] The method for enhancing the anti-corrosion performance of the NdFeB permanent magnets, the pre-treatment process is to first use acetone solution to ultrasonically clean the NdFeB permanent magnets for 20 minutes, take them out and then use absolute ethanol to ultrasonically clean them for 15 minutes, and dry them for later use. .

[0033] The method for enhancing the anti-corrosion performance of NdFeB permanent magnets, the processing technology of electroplating the metal nickel film la...

Embodiment 3

[0038] A method for enhancing the anti-corrosion performance of NdFeB permanent magnets, comprising the following steps:

[0039] The first step: pre-treatment, degreasing and rinsing the NdFeB permanent magnet;

[0040] The second step: electroplating a metal nickel film layer, and plating a layer of metal nickel film layer on the surface of the NdFeB permanent magnet;

[0041] The third step: coating a layer of silicon dioxide film on the surface of the metal nickel film layer.

[0042] The method for enhancing the anti-corrosion performance of the NdFeB permanent magnets, the pre-treatment process is: first use acetone solution to ultrasonically clean the NdFeB permanent magnets for 25 minutes, take them out and then use absolute ethanol to ultrasonically clean them for 15 minutes, and dry them for later use. .

[0043] The method for enhancing the anti-corrosion performance of NdFeB permanent magnets, the processing technology of electroplating the metal nickel film laye...

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Abstract

The invention discloses a method for enhancing the anticorrosion performance of NdFeB permanent magnets, which comprises the following steps: the first step: pretreatment, degreasing and rinsing the NdFeB permanent magnets; the second step: electroplating a metal nickel film layer, Coating a layer of metal nickel film on the surface of the NdFeB permanent magnet; the third step: coating a layer of silicon dioxide film on the surface of the metal nickel film. Compared with the prior art, the beneficial effect of the present invention is: first electroplate the metal nickel film layer on the surface of the NdFeB permanent magnet, and then plate a layer of silicon dioxide film on the surface of the nickel plating layer through the processing technology of evaporation coating, which can effectively Reduce the porosity of the film layer, make the surface of the coating film dense, and significantly enhance the anti-corrosion performance of the NdFeB permanent magnet. At the same time, the thickness of the silicon dioxide film layer will not increase significantly, and will not affect its magnetic output. The production process is safe and environmentally friendly, and meets the national environmental protection requirements.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment, and relates to a method for enhancing the anticorrosion performance of an NdFeB permanent magnet. Background technique [0002] The advantages of NdFeB magnets are high cost performance and good mechanical properties; the disadvantages are that the Curie temperature point is low, the temperature characteristics are poor, and it is easy to be pulverized and corroded. It must be adjusted by adjusting its chemical composition and adopting surface treatment methods. Improvement can meet the requirements of practical application. [0003] Neodymium in NdFeB permanent magnets is a rare earth element with strong chemical activity. It is easily oxidized in the air and has poor corrosion resistance. In NdFeB permanent magnet materials, it is rich in B phase, Nd phase, Nd 2 Fe 14 The electrochemical potentials of the B phases are different, and the electrode potentials of the Nd-rich p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D7/00C25D3/12C23C14/10C23C14/24C23F17/00
Inventor 邵志雄顾欢高雄虎
Owner HUBEI SUNSHORE SOLAR ENERGY IND
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