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Plating solution for chemical nickel plating on surface of neodymium-iron-boron magnetic material and plating method of plating layer

A surface chemistry, NdFeB technology, applied in the direction of liquid chemical plating, metal material coating process, coating, etc., can solve the problems of hydrogen evolution and magnetic performance decline of NdFeB magnetic materials, so as to improve anti-corrosion performance and guarantee The effect of stability, huge market application prospect and promotion value

Active Publication Date: 2021-11-09
合肥华清伽马科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above deficiencies in the prior art, the present invention provides a plating solution and coating plating method for electroless nickel plating on the surface of NdFeB magnetic materials, so as to solve the problem of electrodeposition of the existing electroplating solution on the surface of NdFeB magnets. The problem of hydrogen evolution and the decline of magnetic properties of NdFeB magnetic materials, so as to meet the requirements of magnetic properties and surface anti-corrosion of NdFeB magnetic materials

Method used

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  • Plating solution for chemical nickel plating on surface of neodymium-iron-boron magnetic material and plating method of plating layer

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Embodiment 1

[0046] This embodiment is used for the plating solution of electroless nickel plating on the surface of NdFeB magnetic material, the solvent of described plating solution is deionized water, and the mass concentration range of each component in described plating solution is: 50g / L nickel acetate, 220g / L complexing agent, 55g / L glycine, 140g / L hydrazine and 2.2g / L stabilizer, and the pH value of the plating solution is 12.

[0047] The complexing agent is composed of ethanolamine and glycolic acid with a mass ratio of 30:1;

[0048] The stabilizer is compounded by stabilizer A, stabilizer B and stabilizer C with a mass ratio of 1:100:4.

[0049] The stabilizer A is lead acetate, the stabilizer B is composed of ethoxy propynol ether and sulfuric acid with a mass ratio of 50:1, and the stabilizer C is composed of potassium iodate and potassium hydroxide with a mass ratio of 3:1.

[0050] A method for coating the surface of an NdFeB magnetic material, the method for coating the ...

Embodiment 2

[0062] This embodiment is used for the plating solution of electroless nickel plating on the surface of NdFeB magnetic material, the solvent of described plating solution is deionized water, and the mass concentration range of each component in described plating solution is: 30g / L nickel acetate, 160g / L complexing agent, 30g / L glycine, 130g / L hydrazine and 1g / L stabilizer, and the pH value of the plating solution is 11.

[0063] The complexing agent is composed of diethanolamine and sodium citrate with a mass ratio of 10:1;

[0064] The stabilizer is compounded by stabilizer A, stabilizer B and stabilizer C with a mass ratio of 0.8:80:3.2.

[0065] The stabilizer A is lead acetate, the stabilizer B is composed of ethoxy propynol ether and sulfuric acid with a mass ratio of 40:1, and the stabilizer C is composed of potassium iodate and potassium hydroxide with a mass ratio of 2.4:1.

[0066] A method for coating the surface of an NdFeB magnetic material, the method for coatin...

Embodiment 3

[0078] This embodiment is used for the plating solution of electroless nickel plating on the surface of NdFeB magnetic material, the solvent of described plating solution is deionized water, and the mass concentration range of each component in described plating solution is: 80g / L nickel acetate, 280g / L complexing agent, 80g / L glycolic acid, 150g / L hydrazine and 3.5g / L stabilizer, and the pH value of the plating solution is 13.

[0079] The complexing agent is composed of triethanolamine and ethylenediaminetetraacetic acid with a mass ratio of 50:1;

[0080] The stabilizer is compounded by stabilizer A, stabilizer B and stabilizer C with a mass ratio of 1.2:120:4.8.

[0081] The stabilizer A is lead acetate, the stabilizer B is composed of ethoxy propynol ether and sulfuric acid with a mass ratio of 70:1, and the stabilizer C is composed of potassium iodate and potassium hydroxide with a mass ratio of 3.6:1.

[0082] A method for coating the surface of an NdFeB magnetic mate...

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Abstract

The invention discloses a plating solution for chemical nickel plating on the surface of a neodymium iron boron magnetic material, a solvent of the plating solution is deionized water, the plating solution comprises the following components by mass concentration: 30-80 g / L of nickel-containing main salt, 160-280 g / L of a coordination agent, 30-80 g / L of a buffering agent, 130-150 g / L of a reducing agent and 1-3.5 g / L of a stabilizing agent, and the pH value of the plating solution is 11-13. According to the plating solution, the phenomenon that hydrogen ions are separated out on the surface of the neodymium-iron-boron magnetic material in the nickel-containing electroplating solution in the electro-deposition process can be avoided, the magnetic performance of the neodymium-iron-boron magnetic material cannot be damaged, and the stability of the magnetic performance and the surface corrosion resistance of the neodymium-iron-boron magnetic material are guaranteed. The invention further discloses a plating method of the neodymium-iron-boron magnetic material surface plating layer.

Description

technical field [0001] The invention relates to the technical field of electroless nickel plating, in particular to a plating solution and a coating plating method for electroless nickel plating on the surface of NdFeB magnetic materials. Background technique [0002] NdFeB magnets are widely used in the fields of electronics and motors. The products are precise, and the size tolerance range is less than 0.1mm, even 0.03mm. Due to the electrochemical characteristics of electroplating - the dog bone effect, the tip discharges. The thickness of the coating at the edge and corner of the part is much greater than that in the middle of the plane; it is very difficult to obtain a high-demand coating structure for complex geometry, slender, and large-plane parts. The characteristic of electroless nickel plating is that a coating with uniform thickness can be obtained on the surface of the part, which provides the possibility to solve the above problems. The chemical nickel plating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/34C23C18/18
CPCC23C18/34C23C18/1637C23C18/1834
Inventor 赵鹏亮熊领南陈兴平季仲康
Owner 合肥华清伽马科技有限公司
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