Electroplating process of neodymium-iron-boron magnet

Abstract

The invention discloses an electroplating process of a neodymium-iron-boron magnet. The electroplating process is composed of the following steps that (1) baking is conducted, specifically, the neodymium-iron-boron magnet is placed in a baking oven to be baked; (2) polishing is conducted, specifically, a covering on the surface of the neodymium-iron-boron magnet is removed through rough abrasive paper, and then the surface of the neodymium-iron-boron magnet is polished to be smooth through metallographic abrasive paper; (3) cleaning is conducted, specifically, the surface of the neodymium-iron-boron magnet is scrubbed through alcohol; (4) hole sealing is conducted, specifically, the neodymium-iron-boron magnet is placed in a zinc stearate solution to be dipped; (5) oil removing is conducted, specifically, chemical oil removing is conducted through ultrasonic waves; (6) bright dipping is conducted, specifically, the oil-removed neodymium-iron-boron magnet material is subjected to brightdipping treatment; (7) dip plating is conducted, the magnet material subjected to bright dipping is placed in a dip plating solution to be subjected to dip plating treatment; (8) bright nickel plating is conducted, specifically, the surface of a dip plating layer is plated with bright nickel, and the thickness of a zinc-nickel layer is 5-6 [mu]m; and (9) drying is conducted, specifically, the magnet material is dried in a blown mode through compressed air. The corrosion resistance of the magnet material is improved greatly.

Description

technical field [0001] The invention relates to an electroplating process for an NdFeB magnet, which is applied in the technical field of electroplating alloys. Background technique [0002] NdFeB permanent magnet material is the third generation of new functional materials developed in the 1980s. It has been widely used in microwave communication, audio-visual, instrumentation, electrical engineering, magnetic therapy and other fields. Due to the high content of neodymium in NdFeB, The chemical properties of the material are extremely active, so the material is easily oxidized in a humid environment and reacts strongly with acid. At the same time, the NdFeB permanent magnet material is a product formed by powder metallurgy sintering, with loose structure, high porosity, and excellent surface condition. Poor and brittle, so electroplating treatment is required on the surface of NdFeB permanent magnet materials to improve its corrosion resistance. At present, electroplating, ...

AI Technical Summary

Problems solved by technology

[0002] NdFeB permanent magnet material is the third generation of new functional materials developed in the 1980s. It has been widely used in microwave communication, audio-visual, instrumentation, electrical engineering, magnetic therapy and other fields. Due to the high content of neodymium in NdFeB, The chemical properties of the material are extremely active, so the material is easily oxidized in a humid environment and reacts strongly with acid. At the same time, the NdFeB permanent magnet material is a product formed by powder metallurgy sintering, with loose structure, high porosity, and excellent surface condition. Poor and brittle, so electroplating treatment is required on the surface of NdFeB permanent magnet materials to improve its corrosion resistance. At present, electroplating, double-layer nickel, triple-layer nickel and some other alloy plating are mainly used in the market, but The above coating methods cannot well meet the actual industrial needs