CN102610354A - Processing method for corrosion-resistance rare-earth magnet and workpiece - Google Patents
Processing method for corrosion-resistance rare-earth magnet and workpiece Download PDFInfo
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Abstract
The invention discloses a processing method for corrosion-resistance rare-earth magnet and a work piece, which is characterized by comprising the steps of: preprocessing the rare-earth magnet and the work piece; after the processing, steeping the magnet and the work piece in water-based epoxy zinc-rich silane coating liquid for 2-8 minutes; then standing the magnet and the work piece at a normal temperature for 1-3 minutes; then performing surface treatment on the surfaces of the magnet and the work piece; finally performing heat treatment on the magnet and the work piece for 5-60 minutes at the temperature of 180-200 DEG C so as to form a composite coating on the surfaces of the magnet and the work piece. The invention provides a stable and convenient method to form the protective coating with good corrosion-resistance and heat resistance on the surfaces of the magnet and the work piece.
Description
Technical field
The present invention relates to the processing method of a kind of corrosion proof rare earth magnet and workpiece, especially relate to the rare earth magnet with good corrosion resistance and heat-resistance protection coating and the processing method of workpiece.
Background technology
The NdFeB base permanent magnet is the product through powder metallurgy sintered moulding, and porosity is high, surface state is not good.The Nd standard electrode potential is also more negative than iron; Very easily oxidized in malaria; And corrode with airborne acidic materials generation kickback; The oxide that forms neodymium causes the material efflorescence with hydride, has had a strong impact on the magnetic property of material, so the anticorrosion problem of NdFeB base permanent magnet is the subject matter that needs solution always.
The NdFeB base permanent magnet has been widely used in automobile motor and the elevator motor recently; Magnet needs in the wet environment of heat, to work; And the expection magnet in use can be exposed in the moisture of salt, therefore must give magnet good corrosion resistance with lower cost.In addition, in the manufacturing process of motor, although be the very short time, magnet can experience 300 ℃ or above temperature.Under this situation, magnet and protective coating thereof also must have enough good thermal endurance.
In order to improve the corrosion resistance of NdFeB base permanent magnet, must carry out surface treatment to magnet.Surface treatment mode at present commonly used has electronickelling, electrophoresis, ion to aluminize etc.Although electronickelling makes magnet under the salt fog condition, be easy to get rusty because existence is a spot of pin hole.The humidity resistance of electrophoretic paint is not enough and lack enough thermal endurances.And ion is aluminized and is had good thermal endurance and corrosion resistance usually, but is difficult to realize cheaply because need large-scale equipment.
Application number is that 200380100478 one Chinese patent application has provided the corrosion-resistant film on a kind of rare earth based permanent magnet, and has provided the dipping spin coating method that on workpiece, forms the surfacecti proteon film.It is characterized in that placing the aqueous solution that contains alkyl silicic acid fat hydrating polymer and sheet zinc particle to flood workpiece; Remove the excessive treatment fluid that adheres on the rare earth based permanent magnet with the mode of centrifugal rotation then; Heat treatment at a certain temperature immediately, thus the corrosion proof protective finish of one deck obtained.The thickness of this tunic is about 5～15 μ m, can salt spray resistance 500h.Yet this rare-earth permanent magnet that contains the corrosion resistance protective finish can not satisfy our target call, is mainly reflected on corrosion resistance and the thermal endurance.Under identical thickness condition, need the above or indentation salt mist experiment of salt spray resistance 1000h to reach more than the 500h, and magnet and diaphragm thereof need stand 300 ℃ or above high temperature in short-term.And the rotary dipping method of being mentioned in the patent needs specialized apparatus, and is also bigger to the restriction of the shape of magnet product and size, for large-scale application has been brought certain limitation.
Summary of the invention
The purpose of this invention is to provide a kind of stable and also easily method on the surface of rare-earth permanent magnet and workpiece, form and have good corrosion resistance and stable on heating protective finish.
The processing method of anticorrosive rare earth magnet of the present invention and workpiece is characterized in that: said method comprises: at first rare earth magnet and workpiece are carried out preliminary treatment; After preliminary treatment is accomplished magnet and workpiece were flooded 2～8 minutes in water-thinned epoxy zinc-rich silane coating liquid; Subsequently magnet and workpiece were left standstill 1～3 minute at normal temperatures; Then magnet and surface of the work are carried out surface treatment; At last with magnet and workpiece 180～200 ℃ of following heat treatments 5～60 minutes, form composite coating at magnet and surface of the work.
Blender mixed applying liquid when preferably, said magnet flooded in applying liquid.
Preferably, said preliminary treatment is for carrying out pickling, alkalescence cleaning or bead to the surface of magnet and workpiece.
Preferably, said leaving standstill can be carried out in air, also can vacuum degree less than the vacuum environment of 0.5Pa under or protective gas be to carry out in nitrogen or the argon gas.
Preferably, said surface treatment mode is that bead or vibration are handled.
Preferably; Said bead is 6～8 for adopting Mohs' hardness, and particle size range is 60～180 purpose abrasive materials, is under 0.2～0.8MPa in the compressed air pressure scope; Magnet surface is carried out 5～15 minutes shot-peenings, and said abrasive material can be diamond dust, aluminium oxide, carborundum or zirconia.
Preferably, to handle be with the vibration 0.25～3 minute in vibrating ball-mill of abrasive material and workpiece for said vibration; Said abrasive material can be spherical, oval, cube, triangular prism, cylinder, circular cone, pyrometric cone, quadrangular pyramid, rhombogen or various random body; The material of said abrasive material can be iron, carbon steel, other steel alloy, copper and copper alloy, aluminium and aluminium alloy, other various metals, alloy or Al
2O
3, SiO
2, TiO
2, ZrO
2, pottery, glass, rigid plastics etc. such as SiC; Said abrasive material can use separately also can mix use.
Preferably, said heat treatment can be carried out in air, also can be not more than under the 0.5Pa or protective gas is to carry out in nitrogen or the argon gas in vacuum degree.
Preferably, the average thickness that forms said composite coating at magnet and surface of the work is 1～40 micron.
Preferably, contain zinc flake in the said composite coating, its particulate average length is 0.1～50 micron, and average thickness is 0.01～2 micron, and the content of zinc powder is no less than 30% of said composite coating weight.
Decay resistance through the magnet after the inventive method processing has all had large increase, and this method is convenient and simple, does not need specialized apparatus, can practice thrift cost, enhances productivity simultaneously.
Embodiment
The preparation of rare-earth permanent magnet is accomplished by technique known and manufacturing approach.According to the present invention, resulting permanent magnet surfaces is carried out following processing, form one or more layers diaphragm in its surface, thereby obtain to have good corrosion resistance and stable on heating rare-earth permanent magnet.
Whole surface-treated technological process is: at first magnet is carried out preliminary treatment, can adopt the conventional pretreating process in this area: degreasing degreasing-washing-pickling-washing.Can adopt following mode to carry out as an example; Degreasing degreasing adopts sodium hydroxide solution usually, and consumption is at 10-15g/L, and the oil removing time is 1-5 minute; Washing adopts deionized water to wash, and the dilute nitric acid solution of 1-10% percentage by weight is then adopted in pickling usually.The pickling time then is 0.5～3 minute.
After preliminary treatment is accomplished magnet was flooded 2～8 minutes in applying liquid, apply liquid and in the process of magnet dipping, mix simultaneously with blender; Subsequently with magnet at normal temperature, atmosphere is air, vacuum degree less than leaving standstill 1～3 minute in the vacuum environment under the 0.5Pa or protective gas such as nitrogen, the argon gas; Then magnet surface is carried out bead or vibration processing, purpose is to guarantee uniform film thickness.The process equipment that this surface treatment method uses is simple with device, needn't make special mould clamp especially, can in enormous quantities, many processing simultaneously; Needn't single-piece be installed, working (machining) efficiency improves.
The shot blasting on surface process using be that Mohs' hardness is 6～8 abrasive material (like diamond dust, aluminium oxide, carborundum, zirconia etc.), its particle size range is 60～180 orders, the compressed air pressure scope is 0.2～0.8MPa, the shot-peening time is 5～15 minutes.The vibration treatment process adopts be with material for like iron, carbon steel, other steel alloy, copper and copper alloy, aluminium and aluminium alloy, other various metals, alloy or Al
2O
3, SiO
2, TiO
2, ZrO
2, pottery, glass, rigid plastics etc. such as SiC the vibration 0.25～3 minute in vibrating ball-mill together of abrasive material and magnet; That abrasive material can use is spherical, oval, cube, triangular prism, cylinder, circular cone, pyrometric cone, quadrangular pyramid, rhombogen, indefinite body, other the material of different shape, and mixing that also can these materials are independent or suitable is used.Handle with a big or small example of abrasive material as vibration, under abrasive material was spherical situation, its particle diameter was about 0.3 millimeter to 1 millimeter.
At last with magnet 180～200 ℃ of heat treatments (atmosphere is in air, vacuum or protective gas such as nitrogen, the argon gas) 5～60 minutes, obtain having good corrosion resistance and stable on heating final products.The magnet product in applying liquid dipping, solidify after accomplishing that the percentage by weight of sheet zinc-aluminium powder is no less than 30% of composite coating weight in the diaphragm, optimum range is 43～65%.
This technology has universality, also is suitable for for forming coated film at surface of the work.
The workpiece that said method is suitable for equally refers to various article and the parts of being processed by iron, carbon steel, steel alloy, carbide alloy etc.
Be specific embodiments more of the present invention below.
Embodiment 1:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flooded 8 minutes, subsequently magnet was left standstill 3 minutes at normal temperature, bead is carried out on its surface; Technology is that Mohs' hardness is 6; Granularity is 60 purpose silicon carbide abrasives, and compressed air is 0.2MPa, and the shot-peening time is 5 minutes.Then magnet is incubated 5 minutes at 180 ℃, obtains final products.Wherein the thickness of composite coating is 1 μ m, and the average length of zinc flake is 0.1 μ m in the composite coating, and thickness is 0.01 μ m, and percentage by weight accounts for 30% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 2:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 2min; Subsequently magnet normal temperature under nitrogen protection is left standstill 1min; Bead is carried out on its surface, and technology is that Mohs' hardness is 8, and granularity is 180 purpose alumina abrasives; Compressed air is 0.8MPa, and the shot-peening time is 15min.(insulation 15min obtains final products in the vacuum degree＜0.5MPa) in 200 ℃ of vacuum with magnet then.Wherein the thickness of composite coating is 5 μ m, and the average length of zinc flake is 0.5 μ m in the composite coating, and thickness is 0.05 μ m, and percentage by weight accounts for 35% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 3:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 5min; Subsequently magnet normal temperature under argon shield is left standstill 2min; Bead is carried out on its surface, and technology is that Mohs' hardness is 7, and granularity is 120 purpose silicon carbide abrasives; Compressed air is 0.5MPa, and the shot-peening time is 10min.Then magnet is incubated 10min under 190 ℃ of argon shields, obtains final products.Wherein the thickness of composite coating is 10 μ m, and the average length of zinc flake is 1 μ m in the composite coating, and thickness is 0.1 μ m, and percentage by weight accounts for 40% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 4:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 3min; (normal temperature leaves standstill 1.5min in the vacuum degree＜0.5MPa) in vacuum environment with magnet subsequently; Bead is carried out on its surface, and technology is that Mohs' hardness is 6, and granularity is 150 purpose zirconia abrasive materials; Compressed air is 0.4MPa, and the shot-peening time is 8min.Then magnet is incubated 8min under 180 ℃ of nitrogen protections, obtains final products.Wherein the thickness of composite coating is 15 μ m, and the average length of zinc flake is 10 μ m in the composite coating, and thickness is 0.5 μ m, and percentage by weight accounts for 43% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 5:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 6min, subsequently magnet is left standstill 2.5min at normal temperature, bead is carried out on its surface; Technology is that Mohs' hardness is 8; Granularity is 90 purpose silicon carbide abrasives, and compressed air is 0.6MPa, and the shot-peening time is 12min.Then magnet is incubated 12min at 200 ℃, obtains final products.Wherein the thickness of composite coating is 20 μ m, and the average length of zinc flake is 15 μ m in the composite coating, and thickness is 1 μ m, and percentage by weight accounts for 50% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 6:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 3min; Subsequently magnet normal temperature under nitrogen protection is left standstill 2.5min; Vibration is carried out on its surface to be handled; Technology is with spherical carbon steel abrasive material and magnet vibration 0.25min in vibrating ball-mill, then magnet is incubated 5min at 180 ℃, obtains final products.Wherein the thickness of composite coating is 25 μ m, and the average length of zinc flake is 20 μ m in the composite coating, and thickness is 1.5 μ m, and percentage by weight accounts for 55% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 7:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 6min; Subsequently magnet normal temperature under argon shield is left standstill 2.5min; Vibration is carried out on its surface to be handled; Technology is with oval copper abrasive material, cube shaped aluminium alloy abrasive material and magnet vibration 0.5min in vibrating ball-mill, then magnet is incubated 10min under 190 ℃ of argon shields, obtains final products.Wherein the thickness of composite coating is 30 μ m, and the average length of zinc flake is 35 μ m in the composite coating, and thickness is 2 μ m, and percentage by weight accounts for 60% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 8:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 5min; (normal temperature leaves standstill 2min in the vacuum degree＜0.5MPa) in vacuum environment with magnet subsequently; Vibration is carried out on its surface to be handled; Technology is with cylindrical alumina abrasive, conical abrasive silica, triangular pyramidal zirconium dioxide abrasive material and magnet vibration 1min in vibrating ball-mill, then magnet is incubated 8min under 180 ℃ of nitrogen protections, obtains final products.Wherein the thickness of composite coating is 35 μ m, and the average length of zinc flake is 45 μ m in the composite coating, and thickness is 2 μ m, and percentage by weight accounts for 60% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 9:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 5min; Subsequently magnet normal temperature is left standstill 2min; Vibration is carried out on its surface to be handled; Technology is with rhombus silicon carbide abrasive and magnet vibration 2min in vibrating ball-mill, then magnet is incubated 12min at 200 ℃, obtains final products.Wherein the thickness of composite coating is 40 μ m, and the average length of zinc flake is 30 μ m in the composite coating, and thickness is 2 μ m, and percentage by weight accounts for 65% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 10:
Magnet was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated magnet is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 5min; Subsequently magnet normal temperature under nitrogen protection is left standstill 2min; Vibration is carried out on its surface to be handled; Technology is with the rigid plastics abrasive material of conical abrasive silica, triangular pyramidal zirconium dioxide abrasive material, rhombus silicon carbide abrasive and irregular shape and magnet vibration 3min in vibrating ball-mill, then magnet is incubated 12min at 200 ℃, obtains final products.Wherein the thickness of composite coating is 40 μ m, and the average length of zinc flake is 50 μ m in the composite coating, and thickness is 2 μ m, and percentage by weight accounts for 60% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 11:
The Q235 steel workpiece was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated workpiece is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 6min, subsequently magnet normal temperature is left standstill 2.5min, bead is carried out on its surface; Technology is that Mohs' hardness is 8; Granularity is 90 purpose silicon carbide abrasives, and compressed air is 0.6MPa, and the shot-peening time is 12min.Then magnet is incubated 12min at 200 ℃, obtains final products.Wherein the thickness of composite coating is 30 μ m, and the average length of zinc flake is 15 μ m in the composite coating, and thickness is 1 μ m, and percentage by weight accounts for 50% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Embodiment 12:
The Q235 steel workpiece was carried out degreasing degreasing 35 minutes in the sodium hydroxide solution of 12g/L, adopt deionized water to wash, carry out 2 minutes pickling time, carry out deionized water rinsing at the dilute nitric acid solution of 4% percentage by weight.Then pretreated workpiece is applied in the liquid at water-thinned epoxy zinc-rich silane and flood 5min; Subsequently magnet normal temperature under nitrogen protection is left standstill 2min; Vibration is carried out on its surface to be handled; Technology is with cylindrical alumina abrasive, conical abrasive silica, triangular pyramidal zirconium dioxide abrasive material and magnet vibration 1min in vibrating ball-mill, then magnet is incubated 8min under 180 ℃ of nitrogen protections, obtains final products.Wherein the thickness of composite coating is 40 μ m, and the average length of zinc flake is 10 μ m in the composite coating, and thickness is 2 μ m, and percentage by weight accounts for 60% of whole coating.Investigate anti-neutral salt spray, indentation salt fog level and the thermal endurance index of magnet respectively.The result is as shown in table 1.
Table 1
Can find out by table 1, adopt the decay resistance of magnet of the present invention that large increase has all been arranged, and this method be convenient and simple, does not need specialized apparatus, can practice thrift cost, enhances productivity simultaneously.
What need statement is 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 the qualification to protection range 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 replacement or improvement.Protection scope of the present invention is as the criterion with appended claims.
Claims (10)
1. the processing method of anticorrosive rare earth magnet and workpiece, it is characterized in that: said method comprises: at first rare earth magnet and workpiece are carried out preliminary treatment; After preliminary treatment is accomplished magnet and workpiece were flooded 2～8 minutes in water-thinned epoxy zinc-rich silane coating liquid; Subsequently magnet and workpiece were left standstill 1～3 minute at normal temperatures; Then magnet and surface of the work are carried out surface treatment; At last with magnet and workpiece 180～200 ℃ of following heat treatments 5～60 minutes, form composite coating at magnet and surface of the work.
2. processing method as claimed in claim 1 is characterized in that: blender mixed applying liquid when said magnet flooded in applying liquid.
3. processing method as claimed in claim 1 is characterized in that: said preliminary treatment for pickling is carried out on the surface of magnet and workpiece, alkalescence is cleaned or bead.
4. processing method as claimed in claim 1, it is characterized in that: said leaving standstill can be carried out in air, also can vacuum degree less than the vacuum environment of 0.5Pa under or protective gas be to carry out in nitrogen or the argon gas.
5. processing method as claimed in claim 1 is characterized in that: said surface treatment mode is that bead or vibration are handled.
6. processing method as claimed in claim 5; It is characterized in that: said bead is 6～8 for adopting Mohs' hardness; Particle size range is 60～180 purpose abrasive materials; In the compressed air pressure scope is under 0.2～0.8MPa, and magnet surface is carried out 5～15 minutes shot-peenings, and said abrasive material can be diamond dust, aluminium oxide, carborundum or zirconia.
7. processing method as claimed in claim 5 is characterized in that: it is with the vibration 0.25～3 minute in vibrating ball-mill of abrasive material and workpiece that said vibration is handled; Said abrasive material can be spherical, oval, cube, triangular prism, cylinder, circular cone, pyrometric cone, quadrangular pyramid, rhombogen or various random body; The material of said abrasive material can be iron, carbon steel, other steel alloy, copper and copper alloy, aluminium and aluminium alloy, other various metals, alloy or Al
2O
3, SiO
2, TiO
2, ZrO
2, pottery, glass, rigid plastics etc. such as SiC; Said abrasive material can use separately also can mix use.
8. processing method as claimed in claim 1, it is characterized in that: said heat treatment can be carried out in air, also can be not more than under the 0.5Pa or protective gas is to carry out in nitrogen or the argon gas in vacuum degree.
9. one kind like the described processing method of claim 1-8, it is characterized in that: the average thickness that forms said composite coating at magnet and surface of the work is 1～40 micron.
10. processing method as claimed in claim 9; It is characterized in that: contain zinc flake in the said composite coating; Its particulate average length is 0.1～50 micron, and average thickness is 0.01～2 micron, and the content of zinc powder is no less than 30% of said composite coating weight.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097357A (en) * | 2014-05-09 | 2015-11-25 | 艾普伦 | Process for manufacturing a magnetic part of a differential relay comprising a surface treatment by shot-peening |
| CN105296999A (en) * | 2014-07-30 | 2016-02-03 | 厦门钨业股份有限公司 | Corrosion-resistant surface treatment technology |
| CN112791924A (en) * | 2019-12-30 | 2021-05-14 | 廊坊京磁精密材料有限公司 | Surface treatment method for neodymium iron boron permanent magnet material and permanent magnet material product |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0924715A2 (en) * | 1997-12-19 | 1999-06-23 | Shin-Etsu Chemical Co., Ltd. | Rare earth-based permanent magnet of high corrosion resistance |
| JP2000199074A (en) * | 1998-12-28 | 2000-07-18 | Nippon Parkerizing Co Ltd | Deposition type surface treating liquid of rare earth- iron sintered permanent magnet, its surface treatment, and rare earth-iron sintered permanent magnet having surface treated by that surface treatment |
| CN1396605A (en) * | 2001-06-14 | 2003-02-12 | 信越化学工业株式会社 | Corrosion-resistance rare earth magnet and its making method |
| CN1692458A (en) * | 2002-11-29 | 2005-11-02 | 株式会社新王磁材 | Method for producing corrosion-resistant rare earth based permanent magnet, corrosion-resistant rare earth based permanent magnet, dip spin coating method for work piece, and method for forming coatin |
| CN1299299C (en) * | 2001-11-20 | 2007-02-07 | 信越化学工业株式会社 | Corrosion-resistant rare earth element magnet |
-
2011
- 2011-01-24 CN CN2011100246296A patent/CN102610354A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0924715A2 (en) * | 1997-12-19 | 1999-06-23 | Shin-Etsu Chemical Co., Ltd. | Rare earth-based permanent magnet of high corrosion resistance |
| JP2000199074A (en) * | 1998-12-28 | 2000-07-18 | Nippon Parkerizing Co Ltd | Deposition type surface treating liquid of rare earth- iron sintered permanent magnet, its surface treatment, and rare earth-iron sintered permanent magnet having surface treated by that surface treatment |
| CN1396605A (en) * | 2001-06-14 | 2003-02-12 | 信越化学工业株式会社 | Corrosion-resistance rare earth magnet and its making method |
| CN1299299C (en) * | 2001-11-20 | 2007-02-07 | 信越化学工业株式会社 | Corrosion-resistant rare earth element magnet |
| CN1692458A (en) * | 2002-11-29 | 2005-11-02 | 株式会社新王磁材 | Method for producing corrosion-resistant rare earth based permanent magnet, corrosion-resistant rare earth based permanent magnet, dip spin coating method for work piece, and method for forming coatin |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097357A (en) * | 2014-05-09 | 2015-11-25 | 艾普伦 | Process for manufacturing a magnetic part of a differential relay comprising a surface treatment by shot-peening |
| CN105097357B (en) * | 2014-05-09 | 2019-12-24 | 艾普伦 | Process for manufacturing a magnetic component of a differential relay with surface treatment by shot peening |
| CN105296999A (en) * | 2014-07-30 | 2016-02-03 | 厦门钨业股份有限公司 | Corrosion-resistant surface treatment technology |
| CN105296999B (en) * | 2014-07-30 | 2018-07-31 | 厦门钨业股份有限公司 | A kind of etch-proof process of surface treatment |
| CN112791924A (en) * | 2019-12-30 | 2021-05-14 | 廊坊京磁精密材料有限公司 | Surface treatment method for neodymium iron boron permanent magnet material and permanent magnet material product |
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