Electroplating method of samarium-cobalt magnetic steel

A technology of magnetic steel and samarium cobalt, which is applied in the field of electroplating of samarium cobalt magnetic steel, which can solve the problems of surface pits, debris, and easy corrosion of parts

Active Publication Date: 2020-10-27
厦门金越电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 o

Method used

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  • Electroplating method of samarium-cobalt magnetic steel

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Embodiment

[0029] Embodiment, the electroplating method of a kind of samarium cobalt magnet of the present invention, comprises the following steps:

[0030] 1) Carry out pretreatment to samarium cobalt magnet steel;

[0031] 2) Electroplate nickel on samarium-cobalt magnets: first use high current shock electroplating nickel, electroplating time is T1; then use normal current electroplating nickel, electroplating time is T2; finally use small current electroplating nickel, electroplating time is T3; T1

[0032] 3) Post-processing the nickel-plated samarium-cobalt magnet.

[0033] In this embodiment, in the step 2), the current density of the large current is 20-30A / Kg, and the T1 is 3-5min; the current density of the normal current is 10-15A / Kg, and the T2 is 60-90 min; the current density of the small current is 5-7A / Kg, and the T3 is 20-30 min.

[0034] In the present embodiment, in the step 2), the roller used for nickel electroplating is a mesh-shaped roller on all sides....

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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...

Claims

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Application Information

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IPC IPC(8): C25D3/12C25D5/18C25D5/34C23G1/02
CPCC25D3/12C25D5/18C25D5/34C23G1/02
Inventor 涂伟明陈仙花
Owner 厦门金越电器有限公司
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