Nickel electroplating method for NdFeB thin magnetic steel products

Application date 2015. 10. 16

Applicant Ningbo Yunsheng Magnet Components Technology Co., Ltd. Address No. 20, Anju North Road, Xiaogang, Beilun District, Ningbo City, Zhejiang Province 315040

Applicant Ningbo Yunsheng Co., Ltd.

Ningbo Yunsheng Special Metal Material Co., Ltd.

Inventor Chen Jiuyang Xu Shipao Yang Jianghua Huang Changju Sun Wangjie

Patent agency Ningbo Aosheng Patent Agency (General Partnership) 33226

Name of invention

An electric nickel plating method for NdFeB sheet magnetic steel products

Summary

The present invention discloses a nickel electroplating method for NdFeB thin magnetic steel products, which successively pass pre-nickel plating treatment, semi-gloss nickel plating treatment and bright nickel plating treatment. In the pre-nickel treatment process, double pulses are used Power supply, and the dual-pulse power supply uses a higher current density, so after the pre-nickel treatment, the surface of the neodymium iron boron sheet magnetic steel product forms a pre-nickel coating with high density, high hardness, low porosity and high uniformity. In the subsequent semi-gloss nickel plating process, the semi-gloss nickel solution is composed of nickel sulfate, nickel chloride, boric acid, potassium sodium tartrate, triethanolamine, ammonium sulfate, ammonia and water according to a specific ratio. The semi-gloss nickel solution contains tartaric acid. Potassium sodium is used as a complexing agent, ammonium sulfate is used as a conductive salt to improve the uniformity of the semi-gloss nickel coating, and finally a bright nickel layer with high uniformity is formed on the semi-gloss nickel coating; the advantage is that the nickel coating is pre-plated with high uniformity The composition of nickel layer, semi-gloss nickel layer and bright nickel layer greatly improves the uniformity of coating distribution of NdFeB thin magnetic steel products.
A neodymium iron Nickel electroplating method for boron flake magnetic steel products.pdf