CN102041517A - Water-soluble non-phosphorus degreasing agent for permanent magnet material - Google Patents
Water-soluble non-phosphorus degreasing agent for permanent magnet material Download PDFInfo
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- CN102041517A CN102041517A CN200910235746XA CN200910235746A CN102041517A CN 102041517 A CN102041517 A CN 102041517A CN 200910235746X A CN200910235746X A CN 200910235746XA CN 200910235746 A CN200910235746 A CN 200910235746A CN 102041517 A CN102041517 A CN 102041517A
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Abstract
The invention provides a novel water-soluble non-phosphorus degreasing agent for a permanent magnet material, comprising alkali, a cleaning auxiliary agent and a surface active agent, wherein the alkali is a mixture of two or more of sodium hydroxide, sodium carbonate and sodium gluconate; the cleaning auxiliary agent is a polyacrylic acid polymer; and the surface active agent is a low-foam non-ionic surface active agent. The novel water-soluble non-phosphorus degreasing agent for the permanent magnet material has the characteristics of neutrality, non-phosphorus property, environmental-protection performance and low temperature. According to the invention, the degreasing agent has good wettability, permeability, emulsibility and strong degreasing capability, and can prevent grease dirt from being adsorbed again; the degreasing solution is stable, has high grease dirt capacity and can be used in a long term; 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 degreasing powder can be avoided.
Description
Technical field
The present invention relates to the field of surface treatment of material, especially relate to the degreasing technique of permanent magnet material, specifically, the present invention relates to a kind of water-soluble without phosphorus degreaser that is used for permanent magnet material.
Background technology
Application of neodymium iron boron (NdFeB) permanent magnet material in recent years and development are very rapid, and the protection success or not of Nd-Fe-Bo permanent magnet material is related to one of gordian technique that can material apply.This material mainly is to be prepared from by powder metallurgical technique by elements such as rare earth metal neodymium (Nd), iron and boron.As the strongest present magneticsubstance, be widely used in all fields such as electroplating device, machinery, medical treatment, automobile, application prospect is very wide.
The porous material that Nd-Fe-Bo permanent magnet material is prepared from as a kind of powder metallurgical technique, because of rich neodymium phase wherein, neodymium iron boron principal phase and borderline phase are easy to form intergranular corrosion, very easily corrosion in damp and hot environment, cause the decline or the damage of magnetic property because of corrosion failure, have a strong impact on the work-ing life of Nd-Fe-B permanent magnet, reduced the stability and the reliability of product.Therefore, must carry out rotproofing to Nd-Fe-Bo permanent magnet material.The anti-corrosion method of Nd-Fe-Bo permanent magnet material has much at present.Electronickelling (CN1928163, CN1928163), electro-galvanizing (CN1421547A, CN1056133A, CN1056133) are wherein arranged, electroplate several different methods such as MULTI-LAYER NICKEL, copper facing (CN1514889A), phosphatization, electrocoating paint.
Before all surface was handled, in order to make coating and matrix good binding, it was a step necessary procedure that material matrix is carried out degreasing degreasing.Oil removing only will be to the anticorrosion generation of Nd-Fe-Bo permanent magnet material very big problem.
Existing degreaser is primarily aimed at metal or alloy such as ferrous materials or zinc, copper and studies preparation, and the degreaser of obtaining better effects at these material surface energies is used for neodymium-iron-boron permanent magnetic material surface and often can not obtains effect preferably.This be because: neodymium-iron-boron permanent magnetic material surface is loose porous, and the greasy dirt in the space be difficult for to be removed, its corrosion-resistant simultaneously, strong basicity commonly used easily causes the corrosion of material matrix, influences its performance.
Be that oil removing is with 40～80% sodium hydroxide in the patent of CN1056133 as publication number, alkalescence has very strong corrodibility for the heterogeneous system of Nd-Fe-B permanent magnet too by force.But, as use the too little degreaser of alkalescence, it is clean to cause grease to remove again, influences the combination of coating and matrix.In addition, contain water glass in the degreasing technique that has in above-mentioned patent, water glass can effectively improve deoiling effect.But can stick in the hole of neodymium iron boron at acid cleaning process thing water glass, can influence the surface treatment effect of Nd-Fe-B permanent magnet.With respect to the corrosion-prone characteristics of neodymium iron boron heterogeneous system, the chemical degreasing oil removing has become the main means and the necessary method of Nd-Fe-B permanent magnet pre-treatment.Estimate the effect of oil removing, mainly contain following three kinds of methods at present:
1, moisture film test method(s)
Product after the degreasing with behind the dilute sulphuric acid dipping, is sprayed uniform water smoke, if greasy dirt is arranged, then water will be separated, if not then can form a successive moisture film.
2, fluorescence dye method
Oil-soluble fluorescence dye is added among the greasy dirt, sample is immersed among the greasy dirt, then sample is carried out degreasing degreasing, washing, drying is shone under infrared rays.If there is the bright spot of flash of light in sample, prove that greasy dirt does not move back to the greatest extent as yet, if do not have, proves that then greasy dirt eliminates fully.
3, contact angle method of testing
With the good sample of degreasing degreasing, drip and go up the globule or smeared with cotton swab.If contact angle is little, illustrate that deoiling effect is good more.
Washing assistant is as one of topmost additive in the degreasing fluid, and it must have following several major function: 1. sequestering power: the Ca2+ in the chelating water, Mg2+, and softening of water is to guarantee anion surfactant performance cleaning function; 2. dispersive ability: can promote the dirt dispersion of particles, avoid taking place redeposition; 3. alkali surge capability: make the pH of dirt solution keep certain stability and help decontamination.Before the nineties, tripoly phosphate sodium STPP (STPP) is a washing assistant the most commonly used, but because the discharging of phosphorous scrub raffinate, has caused the eutrophication of rivers and lakes water systems, has caused the serious environmental pollution such as red tide.Therefore, after the seventies, American-European countries just begins to seek without phosphorus substitute.In China, in today of emphasizing Sustainable development and pay attention to day by day environmental protection, limit phosphorus and even taboo phosphorus are inexorable trends, and no phosphatization has become a big hot topic topic.
Summary of the invention
The objective of the invention is provides a kind of environmental protection degreaser of permanent magnet material in order to overcome the defective of prior art, and a kind of new water-soluble without phosphorus degreaser that is used for Nd-Fe-Bo permanent magnet material mainly is provided.
One side according to invention, the invention provides a kind of water-soluble without phosphorus degreaser that is used for permanent magnet material, described degreaser contains alkali, cleaning additive and tensio-active agent, described alkali is two or more mixture in sodium hydroxide, yellow soda ash, the Sunmorl N 60S, described cleaning additive can be acrylic acid polymer, for example, polyacrylic acid (PAA) macromolecule detergency promoter and derivative thereof, described tensio-active agent is low bubble nonionogenic tenside.Wherein, described cleaning additive is the water-soluble polyelectrolyte macromolecular compound.
Wherein, described acrylic acid polymer is selected from least a in polyacrylic acid (PAA), vinylformic acid and the acrylamide copolymer (DEA).
Wherein, described tensio-active agent is that Triton is Triton X-100 or dodecyl Soxylat A 25-7-9 (AEO), and the Triton chemical structural formula is:
Wherein, described alkali content is 20～50 grams per liters.
Wherein, described cleaning additive content is 5～15 grams per liters.
Wherein, described tensio-active agent addition is 3～5 grams per liters.
Wherein, the PH of described degreaser is 7.5～8.5.
Wherein, described degreaser is a kind of low temperature degreaser, and use temperature can be 10～80 ℃, and the best is 30～60 ℃.
Wherein, described permanent magnet material is sintered Nd-Fe-B permanent magnetic material or binding Nd-Fe-B permanent magnetic material.
Compared with prior art, a kind of water-soluble without phosphorus degreaser that is used for permanent magnet material provided by the invention is neutrality, and use temperature is low; This degreaser has good wettability, perviousness and emulsifying property, and the ability of deoiling is strong, can prevent that greasy dirt from adsorbing again; Solution-stabilized, the greasy dirt charge capacity of skim soln is big, the energy life-time service; Because use the nonionogenic tenside foam few, washing performance is superior, can softening water, can prevent that the permanent magnet material that easily is corroded is being corroded in removing oil-bound distemper.Therefore, the invention provides a kind of environmental protection, the without phosphorus degreaser that is used for permanent magnet material is newly filled a prescription.
Embodiment
The present invention will be further described below with reference to embodiment, and embodiments of the invention only are used to technical scheme of the present invention is described, and non-limiting the present invention.
Embodiment 1
Weighing sodium hydroxide 5 restrains respectively, yellow soda ash 15 grams, and DEA 5 grams, Triton 5 grams are dissolved in 1 premium on currency, and PH is 7.5,80 ℃ of temperature.The sintered Nd-Fe-B permanent magnetic material sample is divided into three parts put into wherein oil removing 1 minute, 5 minutes, 24 hours.
Embodiment 2
Weighing sodium hydroxide 5 restrains respectively, yellow soda ash 15 grams, and Sunmorl N 60S 20 grams, the PAA15 gram, Triton 3 grams are dissolved in 1 premium on currency, and PH is 8.0,60 ℃ of temperature.The binding Nd-Fe-B permanent magnetic material sample is divided into three parts put into wherein oil removing 1 minute, 5 minutes, 24 hours.
Embodiment 3
Weighing sodium hydroxide 10 restrains respectively, yellow soda ash 15 grams, and Sunmorl N 60S 5 grams, the PAA10 gram, Triton 4 grams are dissolved in 1 premium on currency, and PH is 8.0,60 ℃ of temperature.The sintered Nd-Fe-B permanent magnetic material sample is divided into three parts put into wherein oil removing 1 minute, 5 minutes, 24 hours.
Embodiment 4
Weighing sodium hydroxide 5 restrains respectively, Sunmorl N 60S 20 grams, and yellow soda ash 15 grams, the DEA10 gram, AEO 4 grams are dissolved in 1 premium on currency, and PH is 8.5,30 ℃ of temperature.The binding Nd-Fe-B permanent magnetic material sample is divided into three parts put into wherein oil removing 1 minute, 5 minutes, 24 hours.
Embodiment 5
Weighing sodium hydroxide 15 restrains respectively, Sunmorl N 60S 20 grams, and yellow soda ash 15 grams, the PAA10 gram, DEA 5 grams, AEO 4 restrains, and is dissolved in 1 premium on currency, and PH is 8.5,10 ℃ of temperature.Sintered Nd-Fe-B permanent magnetic material sample separated into two parts was put into wherein oil removing 1 minute, 5 minutes, 24 hours.
Embodiment 6
Weighing sodium hydroxide 5 restrains respectively, Sunmorl N 60S 10 grams, and yellow soda ash 10 grams, the DEA5 gram, Triton 4 grams are dissolved in 1 premium on currency, and PH is 8.0,40 ℃ of temperature.The sintered Nd-Fe-B permanent magnetic material sample is divided into three parts put into wherein oil removing 1 minute, 5 minutes, 24 hours.
Embodiment 7
Weighing sodium hydroxide 15 restrains respectively, Sunmorl N 60S 10 grams, and yellow soda ash 15 grams, the DEA5 gram, PAA 10 grams, Triton 4 restrains, and is dissolved in 1 premium on currency, and PH is 8.3,60 ℃ of temperature.The sintered Nd-Fe-B permanent magnetic material sample is divided into three parts put into wherein oil removing 1 minute, 5 minutes, 24 hours.
Embodiment 8
Weighing sodium hydroxide 15 restrains respectively, Sunmorl N 60S 10 grams, and yellow soda ash 15 grams, the PAA5 gram, the DEA5 gram, Triton 4 restrains, and is dissolved in 1 premium on currency, and PH is 8.2,55 ℃ of temperature.The binding Nd-Fe-B permanent magnetic material sample is divided into three parts put into wherein oil removing 1 minute, 5 minutes, 24 hours.
The comparative example 1
Take by weighing degreaser commonly used in the market (U.S. hard chemical industry 888 removes oil-bound distemper) respectively, be dissolved in 1 premium on currency, PH is 11.0,55 ℃ of temperature.The sintered Nd-Fe-B permanent magnetic material sample is divided into three parts put into wherein oil removing 1 minute, 5 minutes, 24 hours.
Deoiling effect of the present invention is estimated:
In order to compare the deoiling effect of degreaser among the embodiment of the invention 1～8 and the comparative example 1, use the moisture film test to estimate, the result is as shown in the table, and specific operation process is as follows:
Embodiment 1～8 and comparative example's 1 degreasing degreasing effect
| Embodiment number | 1 minute | 5 minutes | 24 hours |
| Embodiment 1 | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright |
| Embodiment 2 | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright |
| Embodiment 3 | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright |
| Embodiment 4 | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright |
| Embodiment 5 | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright |
| Embodiment 6 | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright |
| Embodiment 7 | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright |
| Embodiment 8 | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright | The moisture film continuous bright, liquid is bright |
| The comparative example 1 | Moisture film is discontinuous, and liquid is bright | The moisture film continuous bright, liquid is bright | Yellow floss appears in the liquid muddiness, |
The comparative example 1 who adopts commercially available degreaser in the prior art from last table and the comparing result of the embodiment 1～8 that adopts degreaser of the present invention are as can be seen, degreaser processing efficiency height of the present invention in the moisture film test, required time is short, and the greasy dirt charge capacity is big, can life-time service.Degreaser of the present invention is handled sample surfaces can reach the effect of thoroughly deoiling in 1 minute, this moment, the test of sample surfaces moisture film showed as the moisture film continuous bright, liquid is bright, moisture film still shows as continuous bright after through 5 minutes even 24 hours, liquid is also still bright, and commercially available degreaser processing sample surface treatment sample surfaces can not reach the effect of thoroughly deoiling in 1 minute, it is discontinuous that sample surfaces moisture film test this moment shows as moisture film, liquid is bright, and will become muddy through liquid after 24 hours, yellow floss occur.This explanation, not only environmental protection is without phosphorus for the without phosphorus degreaser of the present invention, the oil removing ability is strong, and the greasy dirt charge capacity is big, the energy life-time service, and can prevent that permanent magnet material is corroded in degreaser, it is neutral that PH is, more phosphorous than commonly used, PH is that 11 degreaser has remarkable advantages.
Need to prove that foregoing invention content and embodiment are intended to prove the practical application of technical scheme provided by the present invention, should not be construed as qualification protection domain of the present invention.Those skilled in the art are in spirit of the present invention and principle, when doing various modifications, being equal to and replacing or improve.Protection scope of the present invention is as the criterion with appended claims.
Claims (10)
1. water-soluble without phosphorus degreaser that is used for permanent magnet material, it is characterized in that, described degreaser comprises alkali, cleaning additive and tensio-active agent, described alkali is two or more the mixture in sodium hydroxide, yellow soda ash, the Sunmorl N 60S, described cleaning additive is an acrylic acid polymer, and described tensio-active agent is low bubble nonionogenic tenside.
2. water-soluble without phosphorus degreaser according to claim 1 is characterized in that, described acrylic acid polymer is selected from least a in polyacrylic acid, vinylformic acid and the acrylamide copolymer.
3. water-soluble without phosphorus degreaser according to claim 1 is characterized in that, described low bubble nonionogenic tenside is Triton X-100 or dodecyl Soxylat A 25-7-9.
4. water-soluble without phosphorus degreaser according to claim 1 is characterized in that described alkali content is 20～50 grams per liters.
5. water-soluble without phosphorus degreaser according to claim 1 is characterized in that described cleaning additive content is 5～15 grams per liters.
6. water-soluble without phosphorus degreaser according to claim 1 is characterized in that described surfactant content is 3～5 grams per liters.
7. water-soluble without phosphorus degreaser according to claim 1 is characterized in that the pH of described degreaser is 7.5～8.5.
8. water-soluble without phosphorus degreaser according to claim 1 is characterized in that the use temperature of described degreaser is 10～80 ℃.
9. water-soluble without phosphorus degreaser according to claim 5 is characterized in that the use temperature of described degreaser is 30～60 ℃.
10. water-soluble without phosphorus degreaser according to claim 1 is characterized in that described permanent magnet material is sintered Nd-Fe-B permanent magnetic material or binding Nd-Fe-B permanent magnetic material.
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| CN200910235746.XA CN102041517B (en) | 2009-10-13 | 2009-10-13 | Water-soluble non-phosphorus degreasing agent for permanent magnet material |
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| CN200910235746.XA CN102041517B (en) | 2009-10-13 | 2009-10-13 | Water-soluble non-phosphorus degreasing agent for permanent magnet material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492952A (en) * | 2011-11-18 | 2012-06-13 | 东莞市东辉贸易有限公司 | Phosphorus-free degreasing powder, production process and phosphorus-free degreasing process thereof |
| CN107604374A (en) * | 2017-08-11 | 2018-01-19 | 徐州华通浮动油封科技有限公司 | A kind of ironware high-temperature situation goes down fluid composition |
| CN109183051A (en) * | 2018-08-03 | 2019-01-11 | 南京派诺金属表面处理技术有限公司 | It is without phosphorus, without low bubble seconds degreasing agent of silicon one-component room temperature and preparation method thereof |
| CN111549361A (en) * | 2020-05-12 | 2020-08-18 | 江苏兰诺磁业有限公司 | Method for plating double-layer zinc on surface of neodymium iron boron permanent magnet material |
| CN114892178A (en) * | 2022-05-12 | 2022-08-12 | 武汉奥邦表面技术有限公司 | Silicon-free phosphorus-free environment-friendly water-based degreasing agent and application thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492952A (en) * | 2011-11-18 | 2012-06-13 | 东莞市东辉贸易有限公司 | Phosphorus-free degreasing powder, production process and phosphorus-free degreasing process thereof |
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| CN107604374A (en) * | 2017-08-11 | 2018-01-19 | 徐州华通浮动油封科技有限公司 | A kind of ironware high-temperature situation goes down fluid composition |
| CN109183051A (en) * | 2018-08-03 | 2019-01-11 | 南京派诺金属表面处理技术有限公司 | It is without phosphorus, without low bubble seconds degreasing agent of silicon one-component room temperature and preparation method thereof |
| CN111549361A (en) * | 2020-05-12 | 2020-08-18 | 江苏兰诺磁业有限公司 | Method for plating double-layer zinc on surface of neodymium iron boron permanent magnet material |
| CN114892178A (en) * | 2022-05-12 | 2022-08-12 | 武汉奥邦表面技术有限公司 | Silicon-free phosphorus-free environment-friendly water-based degreasing agent and application thereof |
| CN114892178B (en) * | 2022-05-12 | 2023-11-03 | 武汉奥邦表面技术有限公司 | Silicon-free phosphorus-free environment-friendly water-based degreasing agent and application thereof |
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