Treating agent capable of improving surface tension of neodymium iron boron surface nickel and treating method
A technology of surface tension and treatment method, which is applied in the field of treatment agents that can improve the surface tension of NdFeB surface nickel, can solve the problems such as the inability to meet the surface tension requirements of NdFeB magnets on the surface layer of nickel, and can improve the bonding force and increase the surface tension. Effect
Pending Publication Date: 2021-05-28
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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Problems solved by technology
[0006] In view of the problem that the traditional process in the prior art cannot meet the surface tension requirements of the nickel surface layer of NdFeB magnets, the present invention provides a treatment agent and a treatment method that can improve the surface tension of the nickel surface layer of NdFeB magnets; by rationally designing the components of the treatment agent And content, under the appropriate treatment temperature and time, effectively solve the problem that the traditional process cannot meet the surface tension requirements of nickel on the surface of NdFeB magnets
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Embodiment 1
[0031] A kind of treating agent that can improve the nickel surface tension of the NdFeB surface layer of the present embodiment, its preparation process is: add 6L pure water in 15L tank, add successively under stirring condition: 500g sodium hydroxide, 200g sodium carbonate, 150g lemon Sodium trisodium diacetate, 100g sodium silicate, 100g sodium lauryl sulfonate hydrate, 3mL tributyl phosphate, add pure water to 10L volume, and prepare the treatment agent.
[0032] This embodiment also provides a treatment method that can improve the surface tension of the nickel surface layer of NdFeB, and its specific steps are as follows:
[0033] (1) Heat the prepared treatment agent to 70°C and set aside;
[0034] (2) After washing the bright nickel-plated NdFeB magnet with water, put it into the tank containing the treatment agent and soak it for 90S, and the drum rotates continuously during the soaking process;
[0035] (3) After the product processed in step (2) is washed with pure...
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The invention discloses a treating agent capable of improving surface tension of neodymium iron boron surface nickel and a treating method, and belongs to the technical field of neodymium iron boron electroplating aftertreatment. The roughness of the nickel layer surface treated by the treating agent is larger than 0.1 micrometer; the treating agent comprises a reagent A and a reagent B, and the concentration of hydroxide radicals in the treating agent is 0.2-2.5mol / L; the reagent A comprises a strong base solution and / or ammonium hydroxide; and the reagent B comprises metal organic salt, and the metal organic salt comprises 0.03-0.2mol / L of dodecyl sulfonate and 0.04-0.12mol / L of citrate. The binding force of the nickel layer surface and dodecyl sulfonate and citrate in the metal organic salt can be improved, the nickel layer surface and R-OH or R-CONH 2 and other polar groups can form polar bonds easily under the action of the organic polar groups, and therefore the macroscopic expression is surface tension increasing.
Description
technical field [0001] The invention belongs to the technical field of post-treatment of NdFeB electroplating, and more specifically relates to a treatment agent and a treatment method capable of increasing the surface tension of nickel on the surface of NdFeB. Background technique [0002] At present, the demand for magnetic steel in the field of VCM and other micro motors is increasing, and the size of the required magnetic steel is also getting smaller and smaller. When loading tiny magnets, it is necessary to bond the NdFeB magnets and the loading workpiece with glue. Therefore, there are certain requirements for the surface coating tension of NdFeB magnets. At present, the tension of the nickel-plated layer on the surface of NdFeB magnets normally needs to reach more than 38mN / m to meet the adhesive requirements, but the traditional bright nickel process cannot meet the above requirements. In order to meet the surface tension requirements of the coating, the industry ...
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Login to View More IPC IPC(8): C25D5/48C25D3/12
CPCC25D3/12C25D5/48
Inventor 叶瀚棽傅东辉
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD