Surface anticorrosion method for neodymium iron boron ferrite

A technology of ferrite and NdFeB, which is applied in the field of NdFeB ferrite surface anticorrosion, can solve the problems of high power consumption, not conducive to energy saving, and does not meet the requirements of environmental protection and energy saving, so as to improve corrosion resistance and environmental protection. The effect of little pollution

Inactive Publication Date: 2017-05-31
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Benefits of technology

The technical effect of this method lies on improving the durability of neodymium iron boron (Nd) permanent magnets used for various applications such as electric vehicles or wind turbines due to their high strength against rusting even at very low temperatures without losing its properties over time. This results from direct immersive treatments that allow an effective amount of antirust agents to be introduced onto the surfaces during manufacturing processes while also minimizing any harm caused when handling them safely.

Problems solved by technology

This patented technical solution described by researchers solves issues with current methods for preventing damage caused by acidic environments when using neodymium iron boron (Nd) powders due to their weaknesses at high temperatures. These treatments involve various techniques like copper deposition, chromatography, etc., while also being costly and causing excessive water usage.

Method used

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Embodiment Construction

[0013] Embodiments of the present invention are specifically described below.

[0014] First, take the green body of NdFeB ferrite, and you can also choose other types or shapes of NdFeB ferrite materials according to the needs, and carry out pretreatment on the green body of NdFeB ferrite. The body is degreased, polished, rinsed, activated, and rinsed again to ensure that the outer surface of the NdFeB ferrite is clean and smooth. The cleaning agent of the prior art is used for the degreasing; the dilute nitric acid with a concentration of 3-10% is used for 50-200 seconds in the light treatment; the activation treatment is activated with 2-10% dilute sulfuric acid for 10-50 seconds.

[0015] The second is to inject anti-corrosion material nitrogen zinc into the surface of NdFeB ferrite by ion implantation; then passivation treatment is carried out on the surface of NdFeB ferrite. The energy used for the ion implantation is on the order of 50-70KeV; the thickness of the infil...

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Abstract

The invention relates to a surface anticorrosion method for neodymium iron boron ferrite. The surface anticorrosion method for neodymium iron boron ferrite comprises the steps of firstly, carrying out pretreatment, carrying out treatment of oil removal, polishing, rinsing, activation, second time of rinsing and the like on the neodymium iron boron ferrite so as to guarantee that the outer surface of the neodymium iron boron ferrite is clean and smooth; secondly, injecting the anticorrosion material zinc nitride onto the surface of the neodymium iron boron ferrite in an ion injection manner; and carrying out passivation treatment on the surface of the neodymium iron boron ferrite.

Description

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Claims

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Application Information

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