Unlock instant, AI-driven research and patent intelligence for your innovation.

Anti-corrosion method used for neodymium iron boron ferrite

A ferrite and NdFeB technology, applied in the field of NdFeB ferrite anti-corrosion, can solve the problems of large power consumption, unfavorable energy saving, non-compliance with environmental protection and energy saving requirements, etc., to improve corrosion resistance and environmental pollution. small effect

Inactive Publication Date: 2015-12-02
周欢
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using electroplating, the power consumption is large, which is not conducive to energy saving, and does not meet the requirements of environmental protection and energy saving

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Embodiments of the present invention are specifically described below.

[0015] 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, lighted, rinsed, activated, and then rinsed 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.

[0016] The second is to inject anti-corrosion material zinc into the surface of NdFeB ferrite by ion implantation twice; then passivation treatment is carried out on the surface of NdFeB ferrite. The energy used for the first ion implantation is less than the energy used for the second ion implan...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to an anti-corrosion method used for neodymium iron boron ferrite. The method comprises the steps that firstly, pretreatment is conducted, and the neodymium iron boron ferrite is subjected to oil removal, bright dipping, rinsing, excitation, re-rinsing and the like so as to guarantee that the outer surface of the neodymium iron boron ferrite is clean and smooth; secondly, an anti-corrosion material, namely zinc, is injected into the surface of the neodymium iron boron ferrite twice in an ion implantation mode, and then passivating treatment is conducted on the surface of the neodymium iron boron ferrite.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of magnetic materials, in particular to an anti-corrosion method for NdFeB ferrite. Background technique [0002] As a rare earth permanent magnet material, NdFeB ferrite has excellent magnetic properties, good machining characteristics and relatively low price, and is widely used in automation, computers, home appliances, communications and other fields. However, NdFeB ferrite materials have poor chemical stability and are easy to oxidize in the use environment, and severe chemical corrosion will occur under hot and humid conditions, which will deteriorate the magnetic properties and affect the service life of the magnet. [0003] At present, the main method to solve the corrosion problem of NdFeB ferrite is to deposit an anti-corrosion layer on the surface of the magnet. The main treatment processes include surface treatment processes such as electroplating or chemical plating, but the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/48C23C14/14
Inventor 周欢
Owner 周欢