CN106328332A - Magnet with high corrosion resistance - Google Patents
Magnet with high corrosion resistance Download PDFInfo
- Publication number
- CN106328332A CN106328332A CN201610715482.8A CN201610715482A CN106328332A CN 106328332 A CN106328332 A CN 106328332A CN 201610715482 A CN201610715482 A CN 201610715482A CN 106328332 A CN106328332 A CN 106328332A
- Authority
- CN
- China
- Prior art keywords
- magnet
- corrosion resistance
- mass fraction
- sintered permanent
- permanent magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention relates to a magnet with high corrosion resistance. The magnet comprises a sintered permanent magnet and a paint composition coating layer, wherein the paint composition coating layer is arranged outside the sintered permanent magnet, the sintered permanent magnet mainly comprises a rare-earth element, iron and boron, the paint composition coating layer mainly comprises an epoxy resin composition and a curing catalyst, the epoxy resin composition comprises solid epoxy resin with mass fraction of 1-95% and an epoxy value not more than 2Eq/Kg and solid epoxy resin with mass fraction of 1-50% and an epoxy value not more than 4Eq/kg, and the curing catalyst comprises tertiary amine and/or imidazole derivatives. The magnet with high corrosion resistance has the beneficial effects of high corrosion resistance, high bonding strength in a high temperature, high electrical insulativity, low production cost and the like, and is simple to fabricate.
Description
Technical field
The present invention relates to a kind of magnet, particularly relate to the magnet of a kind of high-corrosion resistance.
Background technology
Nd-Fe-B permanent magnet is just being able to swift and violent development and wide with the performance of its excellence, abundant raw material, reasonable prices
General application.It is mainly used in small and special electric machine, permanent magnetism instrument, electronics industry, auto industry, petrochemical industry, nuclear magnetic resonance, NMR dress
Put, the aspect such as sound appliances, magnetic suspension system, magnetic transmission mechanism and device for magnetotherapy.Nd-Fe-B permanent magnet is to have now been found that business
The Magnet that product performance is the highest, is known as magnetic king, has high magnetic property, and its maximum magnetic energy product (BHmax) exceeds ferrum
Oxysome (Ferrite) more than 10 times.The most suitable good of itself machining property, it is Celsius that operating temperature reaches as high as 200
Degree, and its quality is hard, stable performance, has good cost performance, therefore its application is the most extensive.
But because its chemism is very strong, so must process its surface layer, such as zinc-plated, nickel, electrophoresis, passivation etc..
But, owing to easily reacting with the oxygen in air as the rare earth mainly comprised and ferrum, cause it to have poor anti-corruption
Erosion performance.The most various different trials and suggestion are main by improving anticorrosive to the process of above-mentioned magnet surface
Performance.Including utilizing resin as coating composition coating surface, dry method metal plating (such as ion plating), wet method metal plating shape
Become nickel electrodeposited coating etc..The surface treatment method that these forefathers propose is typically the most complicated and time-consuming, thus can not keep away
Exempt to cause the increase of production cost.
It is therefore desirable to design the magnet of a kind of high-corrosion resistance, to overcome the problems referred to above.
Summary of the invention
It is an object of the invention to overcome the defect of prior art, it is provided that a kind of prepare the height simple, production cost is low
The magnet of decay resistance.
The present invention is achieved in that
The present invention provides the magnet of a kind of high-corrosion resistance, including sintered permanent magnet and be arranged at described sintered permanent
Outside paint composite coating, described sintered permanent magnet is mainly made up of rare earth element, ferrum, boron；Described paint composite is coated with
Layer is mainly made up of composition epoxy resin and curing accelerator, and described composition epoxy resin includes that mass fraction is 1-
95%, solid epoxy and the mass fraction of epoxide number no more than 2Eq/kg is 1-50%, epoxide number is more than the consolidating of 4Eq/kg
Body epoxy resin, described curing accelerator includes tertiary amine and/or imdazole derivatives.
Further, described curing accelerator is 2-ethyl-4-methylimidazole.
Further, described paint composite coating also include fusing point be higher than 30 DEG C, mass fraction be the phenol of 5-40%
And cresol novolac resin.
Mass fraction is that the fusing point of the phenol of 5-40% and cresol novolac resin is higher than 100 DEG C.
Further, described paint composite coating also includes zinc phosphate, zinc chromate and hydroxyl zinc phosphite.
Further, the rare earth element in described sintered permanent magnet is PrNd.
The method have the advantages that
The magnet of described high-corrosion resistance, including sintered permanent magnet and be arranged at the paint outside described sintered permanent
Composition coating, described sintered permanent magnet is mainly made up of rare earth element, ferrum, boron；Described paint composite coating is mainly by ring
Epoxy resin composition and curing accelerator composition, described composition epoxy resin include mass fraction be 1-95%, epoxide number not
Solid epoxy and mass fraction more than 2Eq/kg are 1-50%, the epoxide number solid epoxy more than 4Eq/kg, institute
State curing accelerator and include tertiary amine and/or imdazole derivatives.The magnet of described high-corrosion resistance has under highly corrosion resistant, high temperature
Degree of adhesion is strong, electric insulating quality is strong, prepare the beneficial effects such as simple, production cost is low.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiments that technical staff is obtained on the premise of not making creative work, broadly fall into present invention protection
Scope.
The embodiment of the present invention provides the magnet of a kind of high-corrosion resistance, including sintered permanent magnet and be arranged at described sintering
Paint composite coating outside permanent magnet, described sintered permanent magnet is mainly made up of rare earth element, ferrum, boron；Described sintering is forever
Rare earth element in magnet is PrNd, in other embodiments, it is possible to use the rare earth elements such as gadolinium ferrum, cerium substitute PrNd；Also
Co Substitute For Partial ferrum can be used, to reach improve its particular requirement and play the effect of reduction cost.
Described paint composite coating is mainly made up of composition epoxy resin and curing accelerator, described epoxy resin group
Compound include solid epoxy that mass fraction is 1-95%, epoxide number no more than 2Eq/kg and mass fraction be 1-50%,
The epoxide number solid epoxy more than 4Eq/kg, described curing accelerator includes tertiary amine and/or imdazole derivatives.
In this preferred embodiment, described curing accelerator is 2-ethyl-4-methylimidazole.
Further, described paint composite coating also include fusing point be higher than 30 DEG C, mass fraction be the phenol of 5-40%
With cresol novolac resin, phenol and cresol novolac resin are linear phenol-aldehyde resin.In this preferred embodiment, mass fraction is
The phenol of 5-40% and the fusing point of cresol novolac resin are higher than 100 DEG C.
Further, described paint composite coating also includes zinc phosphate, zinc chromate and hydroxyl zinc phosphite, mentioned component
For corrosion-inhibiting pigment, can effectively improve the anti-corrosion property of described paint composite coating.
The preparation method of the magnet of described high-corrosion resistance is: use described paint composite coating to coat at least one
Described sintered permanent magnet, after being dried described paint composite coating, carries out heat treatment to described paint composite coating, can make
For completing, its preparation is simple, can effectively reduce production cost.Described paint composite coating is only to be dried the wet coating bed of material, and
Through the Overheating Treatment impact on the condensation reaction of paint composite coating itself, and it is different from wet method plating and chemical transformation
Art methods includes the interaction between magnet surface and the treatment fluid forming highly corrosion resistant coating, and the present invention provides
The preparation method of the magnet of high-corrosion resistance is the simplest, cost-effective.
Superperformance below by way of many group tests magnet in order to embody described high-corrosion resistance:
1. autoclave test: by the magnet of multiple high-corrosion resistances temperature be 130 DEG C, 100% humidity, pressure
Carry out corrosion test in the environment of 2.7bar, in 7 days, corrosion and lamination do not occur.
2. salt spray test: the magnet of multiple high-corrosion resistances is tested, at 240 hours according to the spray salt of DIN 50021
After, do not find the obvious magnet of corrosive effect.
3. harmful gas test: the magnet of multiple high-corrosion resistances is tested according to the harmful gas of DIN 50018,
Corrosivity is not had to damage in paint composite coating and magnet in 21 day test period.
4. thermostability test: under solid state, carrying out thermogravimetric analysis, heating rate is under 5K/min, and flex point is 410
DEG C, i.e. illustrative material uses and is environmentally limited to 210 DEG C.
5. adhesion strength testing: when defeating in experiment as 15000N, sticks uninfluenced.
6. pressure cuts test: according to the guide of DIN 54451, the magnet of multiple high-corrosion resistances has been carried out pressure and has cut experiment,
130 DEG C of compressive-shear stability are more than 5N/mm2。
In sum, under the magnet of described high-corrosion resistance has highly corrosion resistant, high temperature, degree of adhesion is strong, electric insulating quality
The beneficial effects such as by force, preparation is simple, production cost is low.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (6)
1. the magnet of a high-corrosion resistance, it is characterised in that include sintered permanent magnet and be arranged at described sintered permanent
Outside paint composite coating, described sintered permanent magnet is mainly made up of rare earth element, ferrum, boron；
Described paint composite coating is mainly made up of composition epoxy resin and curing accelerator, described composition epoxy resin
Solid epoxy and mass fraction including mass fraction is 1-95%, epoxide number no more than 2Eq/kg are 1-50%, epoxy
The value solid epoxy more than 4Eq/kg, described curing accelerator includes tertiary amine and/or imdazole derivatives.
The magnet of a kind of high-corrosion resistance the most as claimed in claim 1, it is characterised in that: described curing accelerator is 2-second
Base-4-methylimidazole.
The magnet of a kind of high-corrosion resistance the most as claimed in claim 1 or 2, it is characterised in that: described paint composite is coated with
Layer also include fusing point be higher than 30 DEG C, mass fraction be phenol and the cresol novolac resin of 5-40%.
The magnet of a kind of high-corrosion resistance the most as claimed in claim 3, it is characterised in that: mass fraction is the benzene of 5-40%
The fusing point of phenol and cresol novolac resin is higher than 100 DEG C.
The magnet of a kind of high-corrosion resistance the most as claimed in claim 1 or 2, it is characterised in that: described paint composite is coated with
Layer also includes zinc phosphate, zinc chromate and hydroxyl zinc phosphite.
The magnet of a kind of high-corrosion resistance the most as claimed in claim 1, it is characterised in that: dilute in described sintered permanent magnet
Earth elements is PrNd.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610715482.8A CN106328332A (en) | 2016-08-23 | 2016-08-23 | Magnet with high corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610715482.8A CN106328332A (en) | 2016-08-23 | 2016-08-23 | Magnet with high corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106328332A true CN106328332A (en) | 2017-01-11 |
Family
ID=57790245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610715482.8A Pending CN106328332A (en) | 2016-08-23 | 2016-08-23 | Magnet with high corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106328332A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113004759A (en) * | 2020-12-30 | 2021-06-22 | 昆明狴犴人力资源服务有限公司 | Organic coating material on surface of neodymium iron boron permanent magnet and preparation method thereof |
| CN114574074A (en) * | 2022-04-22 | 2022-06-03 | 三棵树(上海)新材料研究有限公司 | Anticorrosive paint for in-situ synthesis of lamellar zinc phosphate coordination anticorrosive filler and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11193475A (en) * | 1997-12-26 | 1999-07-21 | Nkk Corp | Production of silicon steel sheet for bonded iron core, excellent in adhesive strength, corrosion resistance, and blocking resistance, and its production |
| CN101379109A (en) * | 2006-03-21 | 2009-03-04 | 真空融化两合公司 | Paint composition, in particular anti-corrosive paint for rare earth permanent magnets |
-
2016
- 2016-08-23 CN CN201610715482.8A patent/CN106328332A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11193475A (en) * | 1997-12-26 | 1999-07-21 | Nkk Corp | Production of silicon steel sheet for bonded iron core, excellent in adhesive strength, corrosion resistance, and blocking resistance, and its production |
| CN101379109A (en) * | 2006-03-21 | 2009-03-04 | 真空融化两合公司 | Paint composition, in particular anti-corrosive paint for rare earth permanent magnets |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113004759A (en) * | 2020-12-30 | 2021-06-22 | 昆明狴犴人力资源服务有限公司 | Organic coating material on surface of neodymium iron boron permanent magnet and preparation method thereof |
| CN114574074A (en) * | 2022-04-22 | 2022-06-03 | 三棵树(上海)新材料研究有限公司 | Anticorrosive paint for in-situ synthesis of lamellar zinc phosphate coordination anticorrosive filler and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5289304B2 (en) | Lacquer compositions for rare earth permanent magnets, especially anticorrosion lacquers | |
| CN110144160B (en) | High-solid low-surface-treatment epoxy zinc-rich primer and preparation method and application thereof | |
| JP7034064B2 (en) | Heat-activating curable adhesive coating | |
| US8702898B2 (en) | Method for connecting two joining partners | |
| JP5626078B2 (en) | Magnetic sheet | |
| KR101870489B1 (en) | Resin composition for fixing, rotor, automobile, and method for manufacturing rotor | |
| CN107931062B (en) | Preparation method of wear-resistant and anti-corrosion coating on surface of sintered neodymium-iron-boron magnet | |
| US9394448B2 (en) | Chromate-free ceramic coating compositions | |
| KR102249376B1 (en) | Non-corrosive soft-magnetic powder | |
| CN104073127B (en) | A kind of moisturecuring bituminous epoxy anticorrosive paint and preparation method thereof | |
| KR102106679B1 (en) | Chromate-free ceramic coating composition | |
| EP3561014A2 (en) | Electrical steel sheet adhesive coating composition, electrical steel sheet product, and manufacturing method therefor | |
| CN106328332A (en) | Magnet with high corrosion resistance | |
| EP3561153B1 (en) | Method for producing electromagnetic steel sheet with adhesive insulating coating film and method for producing stacked electromagnetic steel sheet | |
| US20090096561A1 (en) | Rare earth bonded magnet and production method thereof | |
| CN113652001A (en) | Phosphorus-containing solvent type flame retardant and preparation method thereof | |
| CN102453431A (en) | Silanization surface treatment technology of permanent magnetic material | |
| CN107400905A (en) | Coating solution for the coating method of clad steel and for being coated with clad steel | |
| WO2022220295A1 (en) | Magnetic powder, compound, molded body, bonded magnet, and powder magnetic core | |
| CN100403434C (en) | Hard disk driver magnet and its preparation method | |
| US20140159841A1 (en) | Soft magnetic core and method of manufacturing the same | |
| CN105038580A (en) | Self-curing chemically bonded phosphate zinc-rich coating | |
| CN108231396A (en) | A kind of compressing and forming process of bonding rare earth permanent magnet material | |
| CN103773198B (en) | A kind of high and low frequency electronic transformer impregnating resin | |
| CN104789095A (en) | Helical carbon fiber water-based antiseptic camouflage paint and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |
|
| RJ01 | Rejection of invention patent application after publication |