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Electronickelling solution formula used for improving uniform distribution performance of neodymium-iron-boron manget coating and electronickelling method

A neodymium iron boron and nickel electroplating technology, applied in the field of electroplating nickel solution formulation, can solve the problems of reduced cathode polarization, poor dispersion ability, and high cost of liquid exchange, and achieves increasing cathode polarization, improving electrical conductivity, reducing The effect of changing the liquid medicine

Active Publication Date: 2019-12-20
NINGBO YUNSHENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes an improved type of electric current called low resistance (LCR) welding. It involves applying special materials onto metal surfaces with specific properties such as reducing electrical resistances between them while maintaining good contact over time. By replacing existing methods like brushings with these new ones, it becomes easier and more efficient at producing LCR joints compared to previous techniques.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the quality and efficiency of magnetic materials (such as rare earth permanent magnet) during their manufacturing or repair procedures due to the use of various methods like immersion nickeling, semi - brighter nickels, bright chrome plating with low voltage bias, etc., while also addressing issues related to maintaining long battery lifetimes without compromising other properties associated therewith.

Method used

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  • Electronickelling solution formula used for improving uniform distribution performance of neodymium-iron-boron manget coating and electronickelling method
  • Electronickelling solution formula used for improving uniform distribution performance of neodymium-iron-boron manget coating and electronickelling method
  • Electronickelling solution formula used for improving uniform distribution performance of neodymium-iron-boron manget coating and electronickelling method

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Effect test

Embodiment 1

[0024] Embodiment 1: a kind of electroplating solution formula and method thereof for improving the uniform distribution of neodymium-iron-boron magnet coating comprise the following steps:

[0025] ① Pretreatment of NdFeB magnets;

[0026] ② Pre-nickel plating: Put the pre-treated NdFeB magnet into the first nickel electroplating solution for pre-nickel plating treatment, the time is 4648 seconds, in which the first nickel electroplating solution is composed of nickel chloride, boric acid, sodium sulfate or chlorine Potassium chloride conductive salt, o-sulfonyl benzimide and water, the mass volume concentration of nickel chloride is 70 grams per liter, the mass volume concentration of boric acid is 35 grams per liter, the mass volume concentration of sodium sulfate or potassium chloride 80 g / L, the mass volume concentration of o-sulfonyl benzimide is 0.1 mg / L, a high-frequency DC power supply is used in the pre-nickeling process, and its current density is 0.14 ampere / square...

Embodiment 2

[0046] Embodiment 2: a kind of electroplating solution formula and method thereof for improving the uniform distribution of neodymium-iron-boron magnet coating comprise the following steps:

[0047] ① Pretreatment of NdFeB magnets;

[0048] ② Pre-nickel plating: put the pre-treated NdFeB magnet into the first nickel electroplating solution for pre-nickel plating treatment, the time is 3615 seconds, in which the first nickel electroplating solution is composed of nickel chloride, boric acid, sodium sulfate or chlorine Potassium chloride conductive salt, o-sulfonyl benzimide and water, the mass volume concentration of nickel chloride is 150 grams per liter, the mass volume concentration of boric acid is 55 grams per liter, the mass volume concentration of sodium sulfate or potassium chloride 300 g / L, the mass volume concentration of o-sulfonyl benzimide is 0.9 mg / L, a high-frequency DC power supply is used in the pre-nickeling process, and its current density is 0.18 ampere / squa...

Embodiment 3

[0068] Embodiment 3: a kind of electroplating solution formula and method thereof for improving the uniform distribution of neodymium-iron-boron magnet coating comprise the following steps:

[0069] ① Pretreatment of NdFeB magnets;

[0070] ② Pre-nickel plating: put the pre-treated NdFeB magnet into the first nickel electroplating solution for pre-nickel plating treatment, the time is 8795 seconds, in which the first nickel electroplating solution is composed of nickel chloride, boric acid, sodium sulfate or chlorine Potassium chloride conductive salt, o-sulfonyl benzimide and water, the mass volume concentration of nickel chloride is 90 grams per liter, the mass volume concentration of boric acid is 45 grams per liter, the mass volume concentration of sodium sulfate or potassium chloride 160 g / L, the mass volume concentration of o-sulfonyl benzimide is 0.5 mg / L, a high-frequency DC power supply is used in the pre-nickeling process, and its current density is 0.14 ampere / squar...

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Abstract

The invention discloses an electronickelling solution formula used for improving the uniform distribution performance of a neodymium-iron-boron magnet coating and an electronickelling method. The formula comprises the following components according to the concentration: 70-150 g/L of nickel chloride, 80-300 g/L of potassium chloride or sodium sulfate conducting salt, 35-55 g/L of boric acid, and 0.1-0.9 mg/L of benzoic sulfimide, wherein the PH value is 4.0-4.8. The electronickelling solution formula adopts high-concentration nickel chloride to replace common nickel sulfate in the prior art, so that the cathode polarization degree is improved, and the plating solution dispersive capacity and electrical conductivity of nickel chloride are superior to those of nickel sulfate; high-concentration potassium chloride/sodium sulfate conducting salt is adopted, so that the conductivity of the plating solution is greatly improved; and complexes adopted in a traditional formula process are removed, the medical liquid replacement can be reduced, and the water treatment difficulty is reduced.

Description

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Claims

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Application Information

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Owner NINGBO YUNSHENG
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