Electroplate liquid, electroplating method and product

A technology of electroplating solution and electroplating parts, applied in the direction of metal material coating process, etc., can solve the problems of high pre-treatment requirements, low production efficiency, high resistivity, etc., and achieve the effect of good bonding force consistency and stable bonding.

Active Publication Date: 2019-05-28
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pre-treatment requirements are high in production, and at the s

Method used

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  • Electroplate liquid, electroplating method and product
  • Electroplate liquid, electroplating method and product

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Embodiment 1: A double-layer zinc electroplating method for neodymium iron boron magnets, including the following steps:

[0058] ①Put the neodymium iron boron magnets before plating. The specific processing steps are: sequentially putting the neodymium iron boron magnets into the degreasing tank for degreasing treatment, the pickling tank for derusting treatment, and the deashing tank for deashing treatment. The degreasing treatment is a treatment time of 300-600s in a metal degreasing agent. The rust removal treatment is another treatment in nitric acid with a concentration of 3-7% for 30-60s. Deashing treatment is leaching in 3-hydroxy-1,3,5-glutaric acid solution for 30-60s.

[0059] ② Put the pre-treated neodymium iron boron magnet into the electroplating drum (hanger).

[0060] ③Put the drum into the first electroplating bath containing the first electroplating solution for the first electrogalvanizing treatment. The electroplating temperature is 15℃. After electropla...

Example

[0067] Embodiments 2 to 9: a double-layer zinc electroplating method for neodymium iron boron magnets

[0068] The steps ①, ②, and ⑤ of the second to the ninth embodiment are the same as the corresponding operations in the first embodiment, and their difference from the first embodiment is that the parameter values ​​in steps ③ and ④ are different. Refer to Table 1 for the parameter values ​​that are not exactly the same in Examples 1 to 9.

[0069] Table 1: Parameter statistics table in Examples 1 to 9

[0070] Example number

Example Embodiment

[0120] The electro-galvanizing of the NdFeB magnet obtained in step ③ of Example 9 is superior to the electro-galvanizing of the NdFeB magnet obtained in step ③ of Comparative Example in terms of shear force and the qualified amount of salt spray, which shows not only the method of the present invention The obtained double-layer zinc galvanized parts of the neodymium iron boron magnet have good performance, and the addition of polyether to the single-layer zinc galvanized parts obtained based on the first electroplating solution also plays a role in improving the physical and chemical properties of the product.

[0121] In summary, the present invention provides a double-layer zinc electroplating method for neodymium iron boron magnets. The prepared galvanized layer can not only ensure the bonding force requirements, but also high plating efficiency, and can also ensure the corrosion resistance requirements. It has potential industrial application value.

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Abstract

The invention discloses a neodymium iron boron magnet double-layer zinc electroplating method. A neodymium iron boron magnet is subjected to pretreatment, a water solution in which the concentration of zinc sulfate is 400-500 g/L, the concentration of boric acid is 15-25 g/L and the concentration of polyether is 5-30 ml/L is used for electroplating a clad layer with the thickness being 1-4 micronsfor the neodymium iron boron magnet at the temperature of 15-35 DEG C, wherein the pH of the water solution is 4-6; then, a water solution in which the concentration of zinc chloride is 30-70 g/L, the concentration of sodium chloride is 100-300 and the concentration of boric acid is 15-40 is adopted for electroplating a clad layer with the thickness being 5-8 microns for the neodymium iron boronmagnet at the temperature of 15-35 DEG C, wherein the pH of the water solution is 4-6; and then, a galvanized piece of the neodymium iron boron magnet is subjected to aftertreatment, and accordingly aneodymium iron boron magnet double-layer zinc electroplated piece is obtained. The binding force consistency between a first galvanization layer and the neodymium iron boron magnet is good, the galvanization layer and neodymium iron boron magnet binding force consistency is good, and corrosion resisting performance is good.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to an electrogalvanizing method, in particular to a double-layer zinc electroplating method for an NdFeB magnet and a galvanized NdFeB magnet obtained based on the method. Background technique [0002] Compared with the nickel-plated layer, the galvanized layer has the advantages of easy plating, low plating cost and good bonding force with NdFeB magnets, and has been widely used in the surface treatment industry of NdFeB magnets. [0003] There are mainly three kinds of existing electrogalvanizing methods, namely, the electrogalvanizing method using zinc chloride solution as the electroplating solution, the electrogalvanizing method using zinc sulfate solution as the electroplating solution, and the electroplating method using alkaline zincate solution. The zinc chloride solution is used as the electrogalvanizing method of the electroplating solution, the plating solution is...

Claims

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Application Information

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IPC IPC(8): C25D3/22C25D5/36C25D5/10C25D5/48C23G1/08C23C22/68
Inventor 刘晓旭张昕许卫应孟峰周义王瑀瑶
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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