Method for electroplating zinc-nickel alloy on sintered neodymium iron boron

A technology of electroplating zinc-nickel and NdFeB, which is applied in the application of magnetic film to substrate and liquid application, etc. It can solve the problems of low corrosion resistance and poor deep plating ability of NdFeB magnets, etc., and increase the bonding force , the effect of reducing the harm

Inactive Publication Date: 2020-12-11
GANZHOU FORTUNE ELECTRONICS
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a method for sintered NdFeB electroplating zinc-nickel alloy, which has the ability to improve the deep plating ability of sintered NdFeB magnets, and directly forms a zinc-nickel alloy co

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for electroplating zinc-nickel alloy on sintered neodymium iron boron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for sintering neodymium-iron-boron electroplating zinc-nickel alloy, is characterized in that, comprises the following steps:

[0032] (1) Preprocessing:

[0033] The sintered NdFeB magnet is pretreated to obtain a pretreated magnet. The pretreatment includes chamfering treatment, degreasing treatment, pickling treatment and activation treatment, and chamfering treatment, degreasing treatment, pickling treatment and activation treatment are adopted. It is beneficial to improve the electroplating effect and avoid adverse effects on the subsequent electroplating process of NdFeB magnets;

[0034] (2) Nickel plating:

[0035] Soak the pretreated magnet in a solution of 80 degrees for electroless nickel plating, the thickness of electroless nickel plating is 2 microns, and the time is 15 minutes;

[0036] (3) Copper plating:

[0037] The nickel-plated magnet is electroplated copper. The electroplated copper is alkaline copper plating or pyrophosphate copper plat...

Embodiment 2

[0043] A method for sintering neodymium-iron-boron electroplating zinc-nickel alloy, is characterized in that, comprises the following steps:

[0044] (1) Preprocessing:

[0045] The sintered NdFeB magnet is pretreated to obtain a pretreated magnet. The pretreatment includes chamfering treatment, degreasing treatment, pickling treatment and activation treatment, and chamfering treatment, degreasing treatment, pickling treatment and activation treatment are adopted. It is beneficial to improve the electroplating effect and avoid adverse effects on the subsequent electroplating process of NdFeB magnets;

[0046] (2) Nickel plating:

[0047] Soak the pretreated magnet in a solution of 85 degrees for electroless nickel plating, the thickness of electroless nickel plating is 10 microns, and the time is 30 minutes;

[0048] (3) Copper plating:

[0049] The nickel-plated magnet is electroplated with copper. The electroplated copper is alkaline copper plating or pyrophosphate coppe...

Embodiment 3

[0055] A method for sintering neodymium-iron-boron electroplating zinc-nickel alloy, is characterized in that, comprises the following steps:

[0056] (1) Preprocessing:

[0057] The sintered NdFeB magnet is pretreated to obtain a pretreated magnet. The pretreatment includes chamfering treatment, degreasing treatment, pickling treatment and activation treatment, and chamfering treatment, degreasing treatment, pickling treatment and activation treatment are adopted. It is beneficial to improve the electroplating effect and avoid adverse effects on the subsequent electroplating process of NdFeB magnets;

[0058] (2) Nickel plating:

[0059] Soak the pretreated magnet in a solution of 82 degrees for electroless nickel plating, the thickness of electroless nickel plating is 4 microns, and the time is 20 minutes;

[0060] (3) Copper plating:

[0061] The nickel-plated magnet is electroplated with copper. The electroplated copper is alkaline copper plating or pyrophosphate copper...

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

No PUM Login to view more

Abstract

The invention discloses a method for electroplating zinc-nickel alloy on sintered neodymium iron boron. The method comprises the following steps that (1) a sintered neodymium iron boron magnet is pretreated to obtain the pretreated magnet; (2) the pretreated magnet is soaked in a solution of 80-85 DEG C for chemical nickel plating for 15-30 minutes; (3) the magnet subjected to nickel plating is subjected to copper electroplating; (4) the magnet subjected to copper electroplating serves as a cathode and is put into a zinc-nickel alloy electroplating solution for electroplating to obtain a zinc-nickel alloy electroplated product; and (5) the electroplated product is subjected to post-treatment. The chemical nickel plating thickness is 2-10 microns, the electrocoppering is alkaline copperingor pyrophosphate coppering, and the electrocoppering thickness is 1-15 microns. The method solves the problems of poor deep plating capability and low corrosion resistance of the neodymium iron boronmagnet, and has the advantages of improving the deep plating capability of the sintered neodymium iron boron magnet, directly forming the zinc-nickel alloy coating on the surface of the sintered neodymium iron boron magnet, improving the current efficiency on the premise of ensuring the corrosion resistance of the magnet, and the like.

Description

technical field [0001] The invention relates to the technical field of surface treatment and anticorrosion of sintered NdFeB materials, in particular to a method for electroplating zinc-nickel alloys of sintered NdFeB materials. Background technique [0002] As the third generation permanent magnet material, sintered NdFeB permanent magnet material has high magnetic properties, abundant resources and low price, and is widely used in automobiles, computers, nuclear magnetic resonance and other fields. However, since sintered NdFeB is composed of multiple phases, the potential difference of each phase is relatively large, especially the Nd-rich phase has a low potential, which is prone to intergranular corrosion, resulting in poor corrosion resistance of NdFeB itself, which seriously restricts Application of NdFeB. In order to solve this problem, a series of surface treatment technologies for NdFeB protection have been invented, mainly including electro-galvanizing, electro-n...

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
IPC IPC(8): C25D7/00C25D3/12C25D3/38C25D3/56C25D5/12H01F41/26
CPCC25D3/12C25D3/38C25D3/565C25D5/12C25D7/001H01F41/26
Inventor 钟春燕喻玺庞再升陈伟戚植奇王志刚
Owner GANZHOU FORTUNE ELECTRONICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap