Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Surface treatment method for zinc alloy electroplating of automobile permanent magnetic material

A permanent magnet material and surface treatment technology, which is applied in the field of surface treatment of NdFeB permanent magnet materials, can solve the problems of high cost, poor stability of electroless nickel plating, and it is difficult to achieve large-scale industrial production, and achieves high anti-corrosion performance and coating layer. good bonding effect

Active Publication Date: 2014-12-17
TIANJIN SANHUAN LUCKY NEW MATERIAL CO LTD +1
View PDF13 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its cost is high, mainly due to the poor stability of electroless nickel plating, it is not easy to realize mass industrial production

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
  • Surface treatment method for zinc alloy electroplating of automobile permanent magnetic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Will 2.3 kilograms of high-quality NdFeB permanent magnet materials are first polished in a vibration mill for 2 hours. After degreasing and degreasing with sodium phosphate 20g / liter, sodium carbonate 10g / liter and sodium hydroxide 10g / liter, pickle in 1% nitric acid to remove surface oxides, wash 3 times with water, and then activate with 5% sulfuric acid, then use plating The zinc solution is electro-galvanized to form a galvanized layer, wherein: the composition of the galvanized solution is: potassium chloride 180 grams / liter, zinc chloride 100 grams / liter, boric acid 50 grams / liter. The thickness of the galvanized layer is 1 micron. The above-mentioned pretreated NdFeB permanent magnet material is put into the zinc-nickel alloy electroplating bath, and the composition of the zinc-nickel alloy electroplating bath is nickel sulfate heptahydrate 8 grams per liter, sodium hydroxide 120 grams per liter, zinc oxide 15 g / L, Atotech zinc-nickel alloy Reflectalloy addit...

Embodiment 2

[0020] Will 2.5 kilograms of NdFeB permanent magnet materials are polished according to the method in Example 1, degreased and degreased, and activated by pickling. A galvanized layer is formed by electro-galvanizing with a galvanizing solution, wherein: the composition of the galvanizing solution is: 280 grams / liter of ammonium chloride, 35 grams / liter of zinc chloride, and 25 grams / liter of boric acid. The thickness of the galvanized layer is 5 microns. Put the above-mentioned pretreated NdFeB permanent magnet material into the zinc-nickel alloy electroplating bath, the composition of the zinc-nickel alloy electroplating bath is nickel sulfate heptahydrate 8 g / liter, sodium hydroxide 150 g / liter, zinc oxide 12 g / L, Atotech zinc-nickel alloy Reflectalloy additive 40 g / L (Atotech zinc-nickel alloy Reflectalloy additive was purchased from Guangzhou Atotech); pH is 11, reacted in a drum for 120 minutes at 25°C. A coating is formed on the surface of the NdFeB permanent magnet ...

Embodiment 3

[0022] Will 3.5 kilograms of NdFeB permanent magnet materials are polished according to the method in Example 1, degreased and degreased, and activated by pickling. A galvanized layer is formed by electrogalvanizing with a galvanizing solution, wherein: the composition of the galvanizing solution is: 400 grams / liter of zinc sulfate, 30 grams / liter of boric acid; the thickness of the galvanized layer is 3 microns. Put the above-mentioned pretreated NdFeB permanent magnet material into the zinc-nickel alloy electroplating bath, the composition of the zinc-nickel alloy electroplating bath is nickel sulfate heptahydrate 8 g / liter, sodium hydroxide 90 g / liter, zinc oxide 12 g / L, Atotech zinc-nickel alloy Reflectalloy additive 50 g / L (Atotech zinc-nickel alloy Reflectalloy additive was purchased from Guangzhou Atotech); pH is 12, react in a drum for 35 minutes at 25°C. A coating is formed on the surface of the NdFeB permanent magnet material. The thickness of the coating is 6 mic...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a surface treatment method for zinc alloy electroplating of an automobile permanent magnetic material. The surface treatment method comprises the following steps: (1) chamfering and polishing: carrying out conventional polishing on the permanent magnetic material by adopting mechanical vibration grinding and rolling grinding chamfering methods; (2) degreasing and oil removal: adding sodium phosphate, sodium carbonate or sodium hydroxide, and carrying out conventional degreasing and oil removal on the permanent magnetic material after polishing; (3) pickling and derusting: adding a nitric acid solution, and carrying out conventional pickling and derusting on the permanent magnetic material after degreasing and oil removal; (4) electrogalvanizing to form a galvanized layer: carrying out electrogalvanizing bottoming on the permanent magnetic material after pickling and derusting by adopting a galvanizing liquid to form the galvanized layer; and (5) zinc-nickel alloy electroplating to form an alkaline zinc-nickel alloy electroplated layer: adopting a zinc-nickel alloy electroplating liquid to electroplate the permanent magnetic material formed with the galvanized layer to form an alkaline zinc-nickel alloy electroplated layer. The surface treatment method has the advantages of good plated layer binding force, and high corrosion resistance.

Description

technical field [0001] The invention relates to the field of surface treatment of materials, in particular to a surface treatment method of NdFeB permanent magnet materials. Background technique [0002] In recent years, the application and development of NdFeB permanent magnet materials has been very rapid, and the success of the protection of NdFeB permanent magnet materials is one of the key technologies related to the promotion and application of materials. 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 application of NdFeB permanent magnet materials is to first solve the anti-corrosion problem of NdFeB permanent magnet materials. As a porous material prepared by powde...

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): C25D5/10C25D3/22C25D3/56
Inventor 白晓刚潘广麾
Owner TIANJIN SANHUAN LUCKY NEW MATERIAL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com