Method for improving binding force of electro-galvanized layer on surface of neodymium-iron-boron permanent magnet

一种提高钕铁硼永磁体表面电镀锌层结合力的方法

Abstract

The invention belongs to the material surface treatment field and mainly relates to a method for improving the binding force of an electro-galvanized layer on the surface of a neodymium-iron-boron permanent magnet, wherein after the neodymium-iron-boron permanent magnet is chamfered and polished, the neodymium-iron-boron permanent magnet is treated according to the steps of oil removal by acid washing, acid washing, dip plating and electro-galvanizing. According to the invention, the pretreatment of galvanizing is performed after oil removal before galvanizing, acid washing and the dip plating process are combined, and the conventional process of activation after acid washing is omitted, and the method is simple in process, convenient to operate and the like; on the basis of the pretreatment process, electro-galvanizing is performed so that the electro-galvanized protective layer which is good in binding force and corrosion resistance can be obtained; and therefore, the coating high in corrosion resistance is obtained and the binding force of a coating layer and the substrate is also guaranteed.
本发明属于材料表面处理领域,主要涉及一种提高钕铁硼永磁体表面电镀锌层结合力的方法,将钕铁硼永磁体进行倒角打磨后,按以下步骤进行:碱洗除油、酸洗、浸镀、电镀锌处理。本发明采用镀前除油,酸洗和浸镀工艺相结合后进行镀锌的预处理,取消了常规酸洗后还要进行活化的工艺,具有工艺简单,操作方便等优点,在此预处理基础上进行电镀锌,可以获得结合力和耐蚀性好的电镀锌防护层,既得到了高耐蚀性的镀层,也保证了镀层与基体的结合力。

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Cited By (8)

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    CN-103540947-BOctober 21, 2015涿州安泰星电子器件有限公司一种电镀基材除油剂及其制备方法
    CN-103981546-AAugust 13, 2014李少兴Chloride galvanized composite material and preparation method thereof
    CN-104073851-AOctober 01, 2014中磁科技股份有限公司Electrogalvanizing process for neodymium-iron-boron permanent-magnet material
    CN-105506688-AApril 20, 2016广西柳州市龙发金属表面处理技术有限公司Preparation process of acid-base compound Magni coating
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    CN-106521586-AMarch 22, 2017宁波韵升股份有限公司, 宁波韵升磁体元件技术有限公司, 宁波韵升特种金属材料有限公司Electrogalvanizing method of neodymium iron boron magnet