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Additive for bright nickel plating technology for permanent magnetic material

A permanent magnet material and additive technology, which is used in the surface treatment of permanent magnet materials and the additive field of bright nickel electroplating technology to achieve the effect of improving corrosion resistance.

Active Publication Date: 2011-05-04
BEIJING ZHONG KE SAN HUAN HI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to meet the ever-increasing demand for the extensive use of permanent magnet materials, the corrosion resistance of the coating obtained by the above method needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 3 kg of nickel sulfate, 500 g of nickel chloride, and 500 g of boric acid in 8 liters of pure water, adjust the pH, and finally dilute it to 10 liters, beat activated carbon, filter, and electrolyze with a small current. Add primary brightener BBI 3ml / L, secondary brightener PPS 1ml / L, impurity remover VS 1ml / L, wetting agent EHS 1ml / L, make a Huo's groove, add D22×5 bonded NdFeB sample 10 The sheet was plated for 10 minutes at a current of 0.5 amps and a temperature of 55°C. The surface of the coating is bright, and the crystal is fine and bright. The cross-file test shows that the coating does not peel off, does not peel off, and has a good bonding force.

Embodiment 2

[0028] Weigh 2.5 kg of nickel sulfate, 300 g of nickel chloride, and 400 g of boric acid in 8 liters of pure water, adjust the pH, and finally dilute it to 10 liters, beat activated carbon, filter, and electrolyze with a small current. Add primary brightener BSI 3ml / L, secondary brightener PPSOH 1ml / L, PPS1ml / L, impurity remover ALS 2ml / L, wetting agent AES 3ml / L, make a Huo's groove, add D22×5 sintered neodymium iron Ten boron samples were tested for 10 minutes at a current of 0.5 amps and a temperature of 55°C. The surface of the coating is bright, and the crystal is fine and bright. The cross-file test shows that the coating does not peel off, does not peel off, and has a good bonding force.

Embodiment 3

[0030] Weigh 3 kg of nickel sulfate, 500 g of nickel chloride, and 500 g of boric acid in 8 liters of pure water, adjust the pH, and finally dilute it to 10 liters, beat activated carbon, filter, and electrolyze with a small current. Add primary brightener BBI 1.5ml / L, BSI 1ml / L, PAP 1ml / L, secondary brightener PPS 1ml / L, impurity remover VS 1ml / L, wetting agent EHS 1ml / L, and play Huo's tank, Add 10 pieces of D22×5 sintered NdFeB samples and test plating for 10 minutes under the condition of 0.5A current and temperature 55℃. The surface of the coating is bright, and the crystal is fine and bright. The cross-file test shows that the coating does not peel off, does not peel off, and has a good bonding force.

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PUM

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Abstract

The invention relates to an additive for bright nickel plating technology for a permanent magnetic material. The additive comprises a primary brightening agent, a secondary brightening agent and an auxiliary additive, wherein the primary brightening agent is a compound containing an acetylenic bond or sulfonyl; sulphur in the sulfonyl is positive quadrivalent or positive hexavalent; and the secondary brightening agent is a pyridine derivative. By a combination of the pyridine derivative, a ynamine compound and a propiolic alcohol derivative and a combination of a softening agent (impurity removing agent) and a low-foam wetting agent, the novel additive for the bright nickel plating technology is prepared, and has high bright dipping speed, high dispersibility, high color and luster uniformity, fewer decomposition products, long processing cycle, high level, good ductility, high impurity tolerance, low stress and excellent electrochemical performance.

Description

technical field [0001] The invention relates to the field of surface treatment of materials, in particular to the surface treatment technology of permanent magnet materials, in particular, the invention relates to an additive for bright nickel electroplating technology of permanent magnet materials. Background technique [0002] In recent years, the application and development of neodymium iron boron (NdFeB) permanent magnet materials is very rapid, and the success of the protection of NdFeB permanent magnet materials is related to one of the key technologies whether the material can be popularized and applied. The material is mainly prepared from elements such as rare earth metal 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/14
Inventor 白晓刚
Owner BEIJING ZHONG KE SAN HUAN HI TECH
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