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A kind of electroplating pretreatment method and equipment for sintered NdFeB permanent magnet

A pre-plating treatment and NdFeB technology, which is applied in the manufacture of circuits, electrical components, inductors/transformers/magnets, etc., can solve the problems of unsatisfactory cleaning effect and weak ultrasonic intensity, so as to avoid serious shielding of the drum wall and improve the combination force, reduce the effect of labor intensity

Active Publication Date: 2022-02-18
TIANJIN SANHUAN LUCKY NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of fundamentally changing the dependence on nitric acid, in addition, because the ultrasonic wave is not in direct contact with the magnet, the ultrasonic intensity outside the drum is very weak, and the cleaning effect is not ideal. Pretreatment method and equipment, to solve this problem

Method used

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  • A kind of electroplating pretreatment method and equipment for sintered NdFeB permanent magnet
  • A kind of electroplating pretreatment method and equipment for sintered NdFeB permanent magnet
  • A kind of electroplating pretreatment method and equipment for sintered NdFeB permanent magnet

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Embodiment 1

[0050] Embodiment one, combining figure 1 , figure 2 with 3 Be explained:

[0051] A pre-plating treatment method for sintered NdFeB permanent magnets, comprising the following steps:

[0052] S1: Mix the sintered NdFeB magnet and the counterweight evenly and place them in the drum 1 together;

[0053] S2: The drum 1 is placed in the first pretreatment liquid tank for degreasing and degreasing with an alkaline degreasing solution, the concentration of the alkaline degreasing solution is 20g / L, the pH value is 10, the temperature is 60°C, and the degreasing time is 15 minutes ;

[0054] S3: Place the drum 1 in the second pretreatment tank for hot water washing, the hot water washing temperature is 70°C, and the hot water washing time is 3 minutes;

[0055] S4: Place the drum 1 in the third pretreatment liquid tank for mixed acid pickling, the mass fraction of citric acid in the mixed acid is 10%, the mass fraction of hydrogen peroxide is 2%, the temperature: 30°C, the pic...

Embodiment 2

[0061] Embodiment two, on the basis of embodiment one, combine figure 1 , figure 2 with 3 Be explained:

[0062] A pre-plating treatment method for sintered NdFeB permanent magnets, comprising the following steps:

[0063] S1: Mix the sintered NdFeB magnet and the counterweight evenly and place them in the drum 1 together;

[0064] S2: The drum 1 is placed in the first pretreatment liquid tank for degreasing and degreasing with an alkaline degreasing solution, the concentration of the alkaline degreasing solution is 20g / L, the pH value is 10, the temperature is 60°C, and the degreasing time is 15 minutes ;

[0065] S3: Place the drum 1 in the second pretreatment tank for hot water washing, the hot water washing temperature is 70°C, and the hot water washing time is 3 minutes;

[0066] S4: Place the drum 1 in the third pretreatment liquid tank for pickling with mixed acid, the mass fraction of citric acid in the mixed acid is 10%, the mass fraction of hydrogen peroxide is...

Embodiment 3

[0073] Embodiment three, on the basis of embodiment two, combine figure 1 , figure 2 with 3 Be explained:

[0074] A pre-plating treatment method for sintered NdFeB permanent magnets, comprising the following steps:

[0075] S1: Mix the sintered NdFeB magnet and the counterweight evenly and place them in the drum 1 together;

[0076] S2: The drum 1 is placed in the first pretreatment liquid tank for degreasing and degreasing with an alkaline degreasing solution, the concentration of the alkaline degreasing solution is 20g / L, the pH value is 10, the temperature is 60°C, and the degreasing time is 15 minutes ;

[0077] S3: Place the drum 1 in the second pretreatment tank for hot water washing, the hot water washing temperature is 70°C, and the hot water washing time is 3 minutes;

[0078] S4: Place the drum 1 in the third pretreatment liquid tank for mixed acid pickling, the mass fraction of citric acid in the mixed acid is 10%, the mass fraction of hydrogen peroxide is 2%...

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Abstract

The invention relates to the technical field of electroplating pretreatment of sintered NdFeB permanent magnets, and provides a method and equipment for electroplating pretreatment of sintered NdFeB permanent magnets. placed together in the drum; the drum is placed in the first pre-treatment liquid tank for degreasing and degreasing, the drum is placed in the second pre-treatment liquid tank for hot water washing, and the drum is placed in the third pre-treatment tank Pickling with mixed acid in the liquid tank; placing the drum in the fourth pre-treatment liquid tank for a water washing treatment; placing the drum in the fifth pre-treatment liquid tank for activation treatment, the activation liquid composition is Sulfuric acid; the drum is placed in the sixth pretreatment tank for secondary water washing, the invention can effectively ensure the uniformity and cleanliness of the magnet surface, improve the bonding force between the substrate and the coating, improve corrosion resistance, and reduce labor intensity. Improve product qualification rate and realize automatic production.

Description

technical field [0001] The invention relates to the technical field of electroplating pretreatment of sintered NdFeB permanent magnets, in particular to a method and equipment for electroplating pretreatment of sintered NdFeB permanent magnets. Background technique [0002] NdFeB permanent magnets are widely used in high-tech fields such as electronics, communications, medical, aviation, and new energy vehicles due to their excellent magnetic properties. After entering the 21st century, as the country continues to increase support for new energy vehicles, the application of NdFeB permanent magnets in vehicles will become more and more extensive. [0003] The surface of sintered NdFeB permanent magnet is loose, porous and brittle, and it contains a highly active Nd-rich phase, which is easily oxidized and corroded, which seriously affects the application of NdFeB permanent magnet. Therefore, the magnet must be protected by surface treatment. [0004] At present, the protect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/34C25D7/00H01F41/02
CPCC25D5/34C25D7/001H01F41/02
Inventor 贺元辉白晓刚于海华赵木森仉新功韩雪胡蝶
Owner TIANJIN SANHUAN LUCKY NEW MATERIAL CO LTD