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Tin-nickel alloy plating solution used for plating neodymium iron boron permanent magnet material and method for plating neodymium iron boron permanent magnet material by adopting same

A technology of permanent magnet material and tin-nickel alloy is applied in the field of tin-nickel alloy plating solution, and the tin-nickel alloy plating solution is used for electroplating tin-nickel alloy on neodymium iron boron permanent magnet material, which can solve the problems of complicated process and reduce the operation process. , The effect of saving nickel metal and reducing thickness

Active Publication Date: 2011-07-06
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

Because this method needs to electroplate neutral nickel first, and then electroplate acid nickel, the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 3 kg of D15*4 sintered NdFeB permanent magnet materials were polished in a vibration mill for 3 hours. Use 10L degreasing agent, which is composed of 30g / liter sodium phosphate, 8g / liter sodium carbonate and 8g / liter sodium hydroxide. After degreasing and degreasing NdFeB permanent magnet materials, pickle them with 5% nitric acid solution The oxide on the surface of the NdFeB permanent magnet material is then washed with water for 3 times. Then use 5% sulfuric acid solution to activate the NdFeB permanent magnet material, then carry out electroplating, put the above-mentioned pretreated NdFeB permanent magnet material into the tin-nickel alloy plating solution, the composition of the tin-nickel alloy plating solution For: stannous chloride 20 g / L, nickel chloride hexahydrate 20 g / L, potassium pyrophosphate 180 g / L, ammonia water 4ml / L, glycine 15 g / L, complexing agent ethylenediamine 2 g / Lift,. When electroplating, the temperature of the tin-nickel alloy plating sol...

Embodiment 2

[0035]3 kg of D15*4 sintered NdFeB permanent magnet materials were polished in a vibration mill for 3 hours. Use 10L degreasing agent, which is composed of 30g / liter sodium phosphate, 8g / liter sodium carbonate and 8g / liter sodium hydroxide. After degreasing and degreasing NdFeB permanent magnet materials, pickle them with 5% nitric acid solution The oxide on the surface of the NdFeB permanent magnet material is then washed with water for 3 times. Then use 5% sulfuric acid solution to activate the NdFeB permanent magnet material, then carry out electroplating, put the above-mentioned pretreated NdFeB permanent magnet material into the tin-nickel alloy plating solution, the composition of the tin-nickel alloy plating solution For: stannous chloride 30 g / L, nickel chloride hexahydrate 30 g / L, potassium pyrophosphate 200 g / L, ammonia water 6ml / L, glycine 20 g / L, complexing agent ethylenediamine 4 g / L Lift. When electroplating, the temperature of the tin-nickel alloy plating solu...

Embodiment 3

[0037] 3 kg of D15*4 sintered NdFeB permanent magnet materials were polished in a vibration mill for 3 hours. Use 10L degreasing agent, which is composed of 30g / liter sodium phosphate, 8g / liter sodium carbonate and 8g / liter sodium hydroxide. After degreasing and degreasing NdFeB permanent magnet materials, pickle them with 5% nitric acid solution The oxide on the surface of the NdFeB permanent magnet material is then washed with water for 3 times. Then use 5% sulfuric acid solution to activate the NdFeB permanent magnet material, then carry out electroplating, put the above-mentioned pretreated NdFeB permanent magnet material into the tin-nickel alloy plating solution, the composition of the tin-nickel alloy plating solution For: stannous chloride 40 g / L, nickel chloride hexahydrate 40 g / L, potassium pyrophosphate 220 g / L, ammonia water 8ml / L, glycine 25 g / L, complexing agent ethylenediamine 6 g / L When performing electroplating, the temperature of the tin-nickel alloy plating...

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Abstract

The invention provides a tin-nickel alloy plating solution used for plating neodymium iron boron permanent magnet material and a method for plating neodymium iron boron permanent magnet material by adopting the same. The method for plating neodymium iron boron permanent magnet material comprises the following steps of: polishing the surface of the neodymium iron boron permanent magnet material through mechanical vibration grinding; degreasing and deoiling the polished neodymium iron boron permanent magnet material with a mixed degreasing fluid of sodium phosphate, sodium phosphate and sodium hydroxide; pickling and derusting the neodymium iron boron permanent magnet material with a salpeter solution; activating the pickled neodymium iron boron permanent magnet material with a sulfuric acid solution; and plating a tin-nickel alloy film on the activated neodymium iron boron permanent magnet material in a tin-nickel alloy plating solution. The method for plating neodymium iron boron permanent magnet material not only can reduce the thickness of the plated film, but also can greatly improve the corrosion resistance of the neodymium iron boron permanent magnet material.

Description

technical field [0001] The invention relates to a surface treatment method, in particular to a tin-nickel alloy plating solution for electroplating NdFeB permanent magnet materials, and a method for electroplating tin-nickel alloy on NdFeB permanent magnet materials using the tin-nickel alloy plating solution . Background technique [0002] NdFeB permanent magnet material is a sintered magnetic material. During the sintering process, a large number of pores are formed on the surface. These pores increase the difficulty of subsequent electroplating. These pores will lead to poor bonding between the substrate and the coating after electroplating, the inability of the electroplating solution to penetrate into the pores, and the bridging of the coating at the pores, which seriously affects the quality of the surface treatment of NdFeB permanent magnet materials, and then affects the quality of NdFeB permanent magnet materials. corrosion resistance performance. As the king of m...

Claims

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Application Information

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IPC IPC(8): C25D3/56C25D3/60C23G1/02
Inventor 王彦红潘广麾胡振辉
Owner BEIJING ZHONG KE SAN HUAN HI TECH
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