Electroplating method of samarium-cobalt magnetic steel

Abstract

The invention discloses an electroplating method of samarium-cobalt magnetic steel. The electroplating method comprises the following steps of 1) carrying out pretreatment on the samarium-cobalt magnetic steel; (2) carrying out nickel electroplating treatment on the samarium-cobalt magnetic steel, specifically, firstly, carrying out nickel electroplating by adopting large-current impact with the electroplating time of T1, carrying out nickel electroplating by adopting normal current with the electroplating time of T2, and carrying out nickel electroplating by adopting low current with the electroplating time of T3, wherein T1 is less than T2 and T3; and 3) carrying out post-treatment on the samarium-cobalt magnetic steel subjected to nickel electroplating. During nickel electroplating, large-current nickel electroplating, normal-current nickel electroplating and low-current nickel electroplating are sequentially adopted to form different levels of current density electroplating combinations, samarium-cobalt magnetic steel parts are prevented from being corroded by an acid nickel plating solution during nickel plating, a nickel coating with a certain thickness and fine surface crystallization is formed, and the appearance and the protection performance of the nickel coating are ensured.

Description

technical field [0001] The invention relates to an electroplating method, in particular to an electroplating method for samarium cobalt magnet steel. Background technique [0002] Samarium cobalt magnet is a kind of rare earth magnet, which is a kind of magnetic tool material made of samarium, cobalt and other metal rare earth materials, which are melted into alloys, crushed, pressed and sintered. During the use of samarium cobalt magnets, due to external forces such as beating, there will be debris problems, and the outer edge of the parts is easy to be damaged, so it needs to be surface treated. At present, the surface treatment of samarium cobalt magnets on the market mostly adopts CVD parylene and other technologies, but the cost of this technology is high. However, when treated by conventional electroplating methods, samarium cobalt is easily corroded by acidic nickel plating solution, resulting in a large number of pits on the surface of parts. Therefore, a customize...

AI Technical Summary

Problems solved by technology

During the use of samarium cobalt magnets, due to external forces such as beating, there will be debris problems, and the outer edge of the parts is easy to be damaged, so it needs to be surface treated

At present, the surface treatment of samarium cobalt magnets on the market mostly adopts CVD parylene and other technologies, but the cost of this technology is high

However, when treated by conventional electroplating methods, samarium cobalt is easily corroded by acidic nickel plating solution, resulting in a large number of pits on the surface of parts

Therefore, a customized electroplating process is needed to solve the problem that SmCo magnets are brittle and easily corroded

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