Fluoroferrite treatment fluid, surface treatment method for permanent magnet material and permanent magnet material
A fluoroferrite, permanent magnet material technology, applied in the direction of magnetic material, inorganic material magnetism, metal material coating process, etc., can solve problems such as environmental damage, achieve less processing steps, good corrosion resistance and high temperature demagnetization rate Effect
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Embodiment 1
[0015] first change the size to (outer diameter × inner diameter × thickness) 2.3 kilograms of sintered NdFeB permanent magnet materials are pretreated. 10g / liter and sodium hydroxide 10g / liter) to degrease, followed by water washing. The pretreated NdFeB permanent magnet material is treated with fluoroferrate, and the treatment is carried out at room temperature for 30 minutes. The fluoroferrate-treated material was washed with water and dried. The fluoroferrate treatment uses a treatment solution composed of the following: 100 grams per liter of potassium fluoride and 80 grams per liter of nitric acid as the main film-forming agent, 5 grams per liter of zinc oxide as a film-forming aid, and non-ionic Surfactant OP-100.5 g / L. Scanning electron microscope energy spectrum analysis was carried out on the film formed on the surface of the NdFeB permanent magnet material treated with fluoroferrate. The model of the instrument used was German Zeiss 1530VP, and the analysis cond...
Embodiment 2
[0017] first change the size to 2.3 kg of sintered NdFeB permanent magnet materials are pretreated, and the specific steps are: vibrate and grind in a vibration mill for 2 hours, and then use an alkaline solution (sodium phosphate 20g / liter, sodium carbonate 10g / liter and sodium hydroxide 10g / L) degrease and degrease, followed by water washing. The pretreated NdFeB permanent magnet material is treated with fluoroferrate, and the treatment is carried out at room temperature for 30 minutes. The fluoroferrate-treated material was washed with water and dried. The fluoroferrate treatment uses a treatment solution composed of the following: 150 grams per liter of potassium fluoride and 90 grams per liter of nitric acid as the main film-forming agent, 15 grams per liter of zinc nitrate as the film-forming aid, and non-ionic Surfactant OP-100.1 g / L. The scanning electron microscope energy spectrum analysis as described in Example 1 was performed on the film formed on the surface ...
Embodiment 3
[0019] first change the size to 2.3 kg of sintered NdFeB permanent magnet materials are pretreated, and the specific steps are: vibrate and grind in a vibration mill for 2 hours, and then use an alkaline solution (sodium phosphate 20g / liter, sodium carbonate 10g / liter and sodium hydroxide 10g / L) degrease and degrease, followed by water washing. The pretreated NdFeB permanent magnet material is treated with fluoroferrate, and the treatment is carried out at room temperature for 30 minutes. The fluoroferrate-treated material was washed with water and dried. The fluoroferrate treatment uses a treatment solution composed of the following: 120 grams / liter of potassium fluoride and 85 grams / liter of nitric acid as the main film-forming agent, 10 grams / liter of zinc oxide as a film-forming aid, and non-ionic Surfactant OP-100.4 g / L. The scanning electron microscope energy spectrum analysis as described in Example 1 was performed on the film formed on the surface of the NdFeB per...
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