Degreasing agent for permanent magnet material

A technology of permanent magnet material and degreasing agent, which is applied in the field of degreasing agent and degreasing agent of permanent magnet material, can solve the problem of incomplete degreasing and degreasing of NdFeB permanent magnet material and affect the surface of NdFeB permanent magnet material. Treatment effect, can not achieve better results and other problems, to achieve the effect of superior washing performance, large oil load, reducing heat consumption

Inactive Publication Date: 2011-05-04
BEIJING ZHONG KE SAN HUAN HI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Incomplete degreasing and oil removal will have a great negative impact on the anti-corrosion of NdFeB permanent magnet materials
[0006] The existing degreasers are mainly researched and prepared for iron and steel materials or metals or alloys such as zinc and copper. The degreasers that can achieve better results on the surface of these materials often cannot achieve better results when used on the surface of NdFeB permanent magnet materials. Effect
This is because: the surface of NdFeB permanent magnet material is loose and porous, the oil in the gap is not easy to remove, and its corrosion resistance is poor. The commonly used strong alkali can easily cause corrosion of the material matrix a

Method used

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  • Degreasing agent for permanent magnet material
  • Degreasing agent for permanent magnet material
  • Degreasing agent for permanent magnet material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] The degreasing agent is prepared by the following steps: Weigh 50g of sodium hydroxide, 150g of sodium carbonate, 50g of methylidene diphosphonic acid (MDP), and 50g of Triton, and add them to 5L of water in turn, stirring constantly to make them evenly mixed. Add water to make the volume up to 10L. At this time, the concentration of each substance in the degreaser is:

[0032] Sodium hydroxide 5g / L Sodium carbonate 15g / L

[0033] Methylene diphosphonic acid 5g / L Triton 5g / L

[0034] Adjust the pH of the degreaser to 7.5 with an acid-base regulator, and keep the temperature of the degreaser at about 80°C. Divide the same bonded NdFeB permanent magnet material sample into three parts and put them in the above diluent at the same time. Take one part of the above three permanent magnet material samples at the first minute, the fifth minute, and the 24th hour. Out.

Example Embodiment

[0035] Example 2

[0036] The degreasing agent is prepared by the following steps: Weigh 50g of sodium hydroxide, 150g of sodium carbonate, 200g of trisodium phosphate, 100g of 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP), and 30g of Triton. Add to 5L of water one by one, stir constantly to make it evenly mixed, then add water to make the volume up to 10L. At this time, the concentration of each substance in the degreaser is:

[0037] Sodium hydroxide 5g / L Sodium carbonate 15g / L

[0038] Trisodium phosphate 20g / L 1-hydroxyethylidene-1,1-diphosphonic acid 10g / L

[0039] Triton 3g / L

[0040] Adjust the pH of the degreaser to 8.0 with an acid-base regulator, and keep the temperature of the degreaser at about 60°C. Divide the same sintered NdFeB permanent magnet material sample into three parts and put them into the above diluent at the same time. Take out one of the three permanent magnet material samples at the first minute, the fifth minute and the 24th hour respectively. .

Example Embodiment

[0041] Example 3

[0042] The degreasing agent is prepared by the following steps: Weigh 100g of sodium hydroxide, 150g of sodium carbonate, 50g of sodium tripolyphosphate, 100g of ethylenediaminetetramethylmethylenephosphonic acid (EDTMP), and 40g of Triton, and add them to 5L in turn In the water, keep stirring to make it evenly mixed, then add water to make the volume up to 10L. At this time, the concentration of each substance in the degreaser is:

[0043] Sodium hydroxide 10g / L Sodium carbonate 15g / L

[0044] Sodium tripolyphosphate 5g / L ethylenediamine tetramethylene phosphonic acid 10g / L

[0045] AEO 4g / L

[0046] Adjust the pH of the degreaser to 8.0 with an acid-base regulator, and keep the temperature of the degreaser at about 50°C. Divide the same bonded NdFeB permanent magnet material sample into three parts and put them in the above diluent at the same time. Take one part of the above three permanent magnet material samples at the first minute, the fifth minute, and the ...

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Abstract

The invention relates to a degreasing agent for a permanent magnet material. The water-soluble degreasing agent comprises alkaline materials, a cleaning auxiliary agent and a surface active agent, wherein the alkaline materials are selected from at least two of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium hydrogen carbonate, trisodium phosphate or sodium pyrophosphate; the cleaning auxiliary agent is selected from at least one of organic polybasic phosphonic cleaning auxiliary agents, or a mixture of at least one of the organic polybasic phosphonic cleaning auxiliary agents and at least one of inorganic phosphate cleaning auxiliary agents; and the surface active agent is a low-foam non-ionic surface active agent. According to the invention, the degreasing agent provided by the invention has good wettability, permeability and emulsibility, high degreasing speed, higher grease dirt capacity and long service life, and can prevent grease dirt from being adsorbed again; and meanwhile, by using the non-ionic surface active agent, the foam is little, the washing performance is superior, the water can be softened, and the corrosion of the permanent magnet material in the degreasing agent can be avoided.

Description

technical field [0001] The invention relates to a degreasing agent, in particular to a degreasing agent for permanent magnet materials, and belongs to the technical field of material surface treatment. Background technique [0002] In recent years, the application and development of NdFeB permanent magnet materials is very rapid, and whether NdFeB permanent magnet materials can be effectively protected is one of the key technologies related to the promotion and application of NdFeB permanent magnet materials. NdFeB permanent magnet materials are mainly prepared from rare earth metals such as neodymium, iron and boron through powder metallurgy process. As the strongest magnetic material at present, it has been widely used in electroplating devices, machinery, medical treatment, automobiles and other fields, and its application prospects are very broad. [0003] The premise of the wide application of NdFeB permanent magnet materials is to solve the anti-corrosion problem of N...

Claims

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Application Information

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IPC IPC(8): C23G1/14
Inventor 白晓刚
Owner BEIJING ZHONG KE SAN HUAN HI TECH
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