A kind of electroplating method of samarium cobalt magnet steel

Abstract

The invention discloses a method for electroplating samarium-cobalt magnets, which comprises the following steps: 1) performing pretreatment on the samarium-cobalt magnets; The time is T1; then use normal current to electroplate nickel, and the electroplating time is T2; finally, use small current to electroplate nickel, and the electroplating time is T3; T1 is less than T2 and T3; 3) Post-treatment the nickel-plated SmCo magnet. The present invention adopts high current electroplating nickel, normal current nickel electroplating and low current electroplating nickel sequentially during nickel electroplating to form different levels of current density electroplating combinations, preventing samarium cobalt magnetic steel parts from being corroded by acid nickel plating solution during nickel plating, forming Nickel coating with a certain thickness and fine surface crystallization ensures the appearance and protective performance of the nickel coating.

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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