CN114522865A - Bonded neodymium iron boron composite coating - Google Patents
Bonded neodymium iron boron composite coating Download PDFInfo
- Publication number
- CN114522865A CN114522865A CN202110612365.XA CN202110612365A CN114522865A CN 114522865 A CN114522865 A CN 114522865A CN 202110612365 A CN202110612365 A CN 202110612365A CN 114522865 A CN114522865 A CN 114522865A
- Authority
- CN
- China
- Prior art keywords
- iron boron
- neodymium iron
- bonded
- spraying
- composite coating
- 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
- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 61
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000000576 coating method Methods 0.000 title claims abstract description 37
- 239000011248 coating agent Substances 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000005507 spraying Methods 0.000 claims abstract description 38
- 239000003973 paint Substances 0.000 claims abstract description 36
- 238000005096 rolling process Methods 0.000 claims abstract description 26
- 229920000052 poly(p-xylylene) Polymers 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010977 jade Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000001962 electrophoresis Methods 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000001723 curing Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2503/00—Polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a bonded neodymium iron boron composite coating, which comprises the following spraying steps: s1, directly carrying out first rolling spraying after blank pressing, curing, cooling and inspecting the bonded NdFeB product, rotationally preheating the bonded NdFeB product in a rolling spraying machine, starting spraying paint after the temperature is reached, and controlling the thickness of a paint film to be 0.01-0.02 mm; s2, performing parylene treatment on the bonded neodymium iron boron product sprayed with the paint in the S1, wherein the film thickness is 10-100 mu m; and S3, performing secondary rolling spraying on the bonded NdFeB product after the parylene is removed in the step S2, and controlling the film thickness to be 0.01-0.03mm to obtain the bonded NdFeB product with the composite coating. According to the invention, the three-layer anti-corrosion composite coating is formed by using the modes of rolling spraying, parylene and rolling spraying, so that the problems that the cost of electrophoresis is relatively high, the production efficiency is low for some products with special shapes, and meanwhile, the parylene coating is soft in hardness and easy to damage are solved.
Description
Technical Field
The invention relates to the field of bonded neodymium iron boron coatings, in particular to a bonded neodymium iron boron composite coating.
Background
The bonded Nd-Fe-B magnet consists of Nd2Fe14B and is a synthetic magnet. The bonded neodymium iron boron magnet is prepared by mixing rapidly quenched NdFeB magnetic powder and a binder through compression molding or injection molding. The bonded magnet has high dimensional accuracy, can be made into a magnetic component with a relatively complex shape, and has the characteristics of one-step forming, multi-polar orientation and the like. The bonded neodymium iron boron has high mechanical strength and can be formed with other matched components at one time during forming.
Because of the characteristics of the self material of the bonded neodymium iron boron, the bonded neodymium iron boron is easy to oxidize and rust, thereby causing the loss of magnetism and causing various consequences. The conventional corrosion prevention method for bonding neodymium iron boron is to add an organic coating on the surface of the magnet, such as electrophoresis, spraying or parylene (vacuum vapor deposition), to isolate the magnet from direct contact with the environment. The salt spray test of electrophoresis is generally about 48 hours, two types of spraying are adopted, namely rolling spraying and flat spraying, the salt spray test of rolling spraying is about 24 hours, the flat spraying is also about 48 hours, and the parylene has good anti-corrosion performance, generally more than 72 hours. In some occasions with high requirements on corrosion resistance, a composite coating of firstly carrying out electrophoresis and then carrying out parylene is adopted, and the salt spray test of the process can reach more than 96 hours. However, the cost of electrophoresis is relatively high, the production efficiency is low for some products with special shapes, and meanwhile, the parylene coating is soft in hardness and easy to damage.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a bonded neodymium iron boron composite coating, which solves the problems that in the prior art, in some occasions with high requirements on corrosion resistance, a composite coating of firstly electrophoresis and then parylene is adopted, but the cost of electrophoresis is relatively high, in addition, for some products with special shapes, the production efficiency is low, and meanwhile, the parylene coating has soft hardness and is easy to damage.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the spraying step of the bonded neodymium iron boron composite coating is as follows:
s1, directly carrying out first rolling spraying after blank pressing, curing, cooling and inspecting the bonded NdFeB product, rotationally preheating the bonded NdFeB product in a rolling spraying machine, starting spraying paint after the temperature is reached, and controlling the thickness of a paint film to be 0.01-0.02 mm;
s2, performing parylene treatment on the bonded neodymium iron boron product sprayed with the paint in the S1, wherein the film thickness is 10-100 mu m;
s3, performing secondary rolling spraying on the bonded neodymium iron boron product with the parylene in the S2, and controlling the film thickness to be 0.01-0.03mm to obtain the bonded neodymium iron boron product with the composite coating;
and S4, performing a salt spray test and a damp-heat test on the bonded neodymium iron boron product with the composite coating obtained in the S3.
Preferably, the preheating temperature of the bonded neodymium iron boron product in the S1 in the rolling sprayer is 18-25 minutes, the abrasive can be added into the rolling sprayer when the bonded neodymium iron boron product is preheated and rotated, the abrasive is white jade steel powder, and the fineness of the abrasive is 400-600 meshes.
Preferably, the paint sprayed on the first roller and the paint sprayed on the second roller in S1 and S3 both use resin paint containing polar bonds in the molecule, such as polyurethane or epoxy, to increase the binding force between the paint film and the magnet.
(III) advantageous effects
The invention provides a bonded neodymium iron boron composite coating and a preparation method thereof. The method has the following beneficial effects:
the spraying process of the bonded neodymium iron boron composite coating has the advantages that the electrophoresis is replaced by the first rolling spraying, the cost is reduced, the pre-treatment and the post-treatment of the electrophoresis are omitted, the phosphorization is not needed, no wastewater exists, the influence on the environment is small, the second spraying mainly plays a role in protecting the parylene coating, the parylene coating is prevented from being damaged in the production and transportation processes, and meanwhile, the coatings sprayed twice have a certain anticorrosion effect.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides the spraying steps of the bonded NdFeB composite coating, which are as follows:
s1, directly carrying out first rolling spraying after blank pressing, curing, cooling and inspecting the bonded NdFeB product, carrying out rotary preheating on the bonded NdFeB product for 20 minutes in a rolling spraying machine, starting spraying paint after the temperature is reached, wherein the paint is polyurethane paint, and the thickness of the paint film is controlled to be 0.01-0.02 mm.
And S2, performing parylene treatment on the bonded neodymium iron boron product sprayed with the paint in the S1, wherein the thickness of the parylene film is between 10 and 100 mu m.
And S3, performing second rolling spraying on the bonded neodymium iron boron product after the parylene in the S2, wherein the paint is epoxy resin paint, and the thickness of the paint film is controlled to be 0.01-0.03mm, so that the bonded neodymium iron boron product with the composite coating is obtained.
And S4, performing a salt spray test and a damp-heat test on the bonded neodymium iron boron product with the composite coating obtained in the S3.
Preferably, the preheating temperature of the bonded neodymium iron boron product in the step S1 in the rolling sprayer is 18-25 minutes, the abrasive can be added into the rolling sprayer when the bonded neodymium iron boron product is preheated and rotated, the abrasive is white jade steel powder, the fineness of the abrasive is 400-600 meshes, on one hand, burrs on the surface of the bonded neodymium iron boron product are ground, and on the other hand, the temperature of the bonded neodymium iron boron product meets the process requirements.
Preferably, the paint sprayed on the first roller and the paint sprayed on the second roller in S1 and S3 both use resin paint containing polar bonds in the molecule, such as polyurethane or epoxy, to increase the binding force between the paint film and the magnet.
The second embodiment:
the embodiment of the invention provides a bonded neodymium iron boron composite coating, which comprises the following spraying steps:
s1, directly carrying out first rolling spraying after blank pressing, curing, cooling and inspecting the bonded NdFeB product, carrying out rotary preheating on the bonded NdFeB product for 25 minutes in a rolling spraying machine, starting spraying paint after the temperature is reached, wherein the paint is epoxy resin paint, and the thickness of the paint film is controlled to be 0.01-0.02 mm.
And S2, performing parylene treatment on the bonded neodymium iron boron product sprayed with the paint in the S1, wherein the thickness of the parylene film is between 10 and 100 mu m.
And S3, performing second rolling spraying on the bonded neodymium iron boron product subjected to the parylene treatment in the S2, wherein the paint is polyurethane paint, and the thickness of the paint film is controlled to be 0.01-0.03mm, so that the bonded neodymium iron boron product with the composite coating is obtained.
And S4, performing a salt spray test and a damp-heat test on the bonded neodymium iron boron product with the composite coating obtained in the S3.
The results of the salt spray test and the damp heat test for multiple hours passed by the bonded neodymium iron boron product with the composite coating obtained in examples one and two are summarized, and the composite coating can withstand the salt spray test for 96 hours plus the damp heat test for 120 hours.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. Bond neodymium iron boron composite coating, its characterized in that: the spraying step of the bonded neodymium iron boron composite coating is as follows:
s1, directly carrying out first rolling spraying after blank pressing, curing, cooling and inspecting the bonded NdFeB product, rotationally preheating the bonded NdFeB product in a rolling spraying machine, starting spraying paint after the temperature is reached, and controlling the thickness of a paint film to be 0.01-0.02 mm;
s2, performing parylene coating on the bonded NdFeB product sprayed with the paint in the S1, wherein the film thickness is between 10 and 100 micrometers;
s3, performing secondary rolling spraying on the bonded neodymium iron boron product with the parylene in the S2, and controlling the film thickness to be 0.01-0.03mm to obtain the bonded neodymium iron boron product with the composite coating;
and S4, performing a salt spray test and a damp-heat test on the bonded neodymium iron boron product with the composite coating obtained in the S3.
2. The bonded neodymium iron boron composite coating of claim 1, characterized in that: the preheating temperature of the bonded neodymium iron boron product in the S1 in the rolling and spraying machine is 18-25 minutes, the abrasive can be added into the rolling and spraying machine when the bonded neodymium iron boron product is preheated and rotated, the abrasive is white jade steel powder, and the fineness of the abrasive is 400-600 meshes.
3. The bonded neodymium iron boron composite coating of claim 1, characterized in that: and in the S1 and S3, the paint sprayed for the first time and the paint sprayed for the second time both use resin paint containing polar bonds in molecules, such as polyurethane or epoxy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110612365.XA CN114522865A (en) | 2021-06-02 | 2021-06-02 | Bonded neodymium iron boron composite coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110612365.XA CN114522865A (en) | 2021-06-02 | 2021-06-02 | Bonded neodymium iron boron composite coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114522865A true CN114522865A (en) | 2022-05-24 |
Family
ID=81619758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110612365.XA Pending CN114522865A (en) | 2021-06-02 | 2021-06-02 | Bonded neodymium iron boron composite coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114522865A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH037336A (en) * | 1989-06-05 | 1991-01-14 | Tdk Corp | Article having p-xylene polymer film improved for adhesive and hardness |
| JP2004039822A (en) * | 2002-07-02 | 2004-02-05 | Seiko Epson Corp | Permanent magnet, components for motors, and motor |
| CN102140666A (en) * | 2011-01-14 | 2011-08-03 | 成都图南电子有限公司 | Binding neodymium iron boron magnet coating method and multi-layer structure prepared by utilizing same |
| FR2991096A1 (en) * | 2012-05-22 | 2013-11-29 | Centre Nat Rech Scient | METHOD FOR MANUFACTURING A FILM COMPRISING THREE DIMENSIONAL MAGNETIC MICROSTRUCTURES |
| CN110189908A (en) * | 2019-06-25 | 2019-08-30 | 江苏赛清科技有限公司 | The method of Nd-Fe-B magnetic material aqueous, environmental protective shallow layer composite protective |
| US20210098166A1 (en) * | 2018-05-08 | 2021-04-01 | Abiomed Europe Gmbh | Corrosion-resistant permanent magnet and intravascular blood pump comprising the magnet |
-
2021
- 2021-06-02 CN CN202110612365.XA patent/CN114522865A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH037336A (en) * | 1989-06-05 | 1991-01-14 | Tdk Corp | Article having p-xylene polymer film improved for adhesive and hardness |
| JP2004039822A (en) * | 2002-07-02 | 2004-02-05 | Seiko Epson Corp | Permanent magnet, components for motors, and motor |
| CN102140666A (en) * | 2011-01-14 | 2011-08-03 | 成都图南电子有限公司 | Binding neodymium iron boron magnet coating method and multi-layer structure prepared by utilizing same |
| FR2991096A1 (en) * | 2012-05-22 | 2013-11-29 | Centre Nat Rech Scient | METHOD FOR MANUFACTURING A FILM COMPRISING THREE DIMENSIONAL MAGNETIC MICROSTRUCTURES |
| US20210098166A1 (en) * | 2018-05-08 | 2021-04-01 | Abiomed Europe Gmbh | Corrosion-resistant permanent magnet and intravascular blood pump comprising the magnet |
| CN110189908A (en) * | 2019-06-25 | 2019-08-30 | 江苏赛清科技有限公司 | The method of Nd-Fe-B magnetic material aqueous, environmental protective shallow layer composite protective |
Non-Patent Citations (1)
| Title |
|---|
| 韩凤麟: "《粉末冶金手册 下》", 30 June 2012, 冶金工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102936455B (en) | Neodymium iron boron rare earth permanent magnet surface anti-corrosion coating and preparation method thereof | |
| CN101724801B (en) | Comprehensive anticorrosive method of metal pipe fitting | |
| CN102605361B (en) | A kind of surface treatment method of sintered Nd-Fe-B magnetic material | |
| CN107931062A (en) | A kind of preparation method of Sintered NdFeB magnet surface abrasion resistance corrosion-inhibiting coating | |
| CN103578735B (en) | A kind of preparation method of flexible rubber neodymium iron boron magnetic body | |
| CN102653643A (en) | Zinc-based composite coating for improving corrosion resistance of neodymium-iron-boron magnet | |
| CN101920243A (en) | Method for manufacturing imitating silver on surface of steel product | |
| CN104624448A (en) | Electrostatic powder surface spraying method for NdFeB permanent magnet | |
| CN114522865A (en) | Bonded neodymium iron boron composite coating | |
| CN101153389A (en) | Metal surface treatment technique for magnesium alloy | |
| CN102242386A (en) | Preparation method for forming film on surface of stainless steel | |
| CN104328418A (en) | Environment-friendly passivation technology for hot-dip galvanized surface of steel | |
| CN105344565A (en) | High-corrosion-resistant composite protective coating resistant to high-temperature and high-pressure environment corrosion on surface of magnetic material and preparation method of coating | |
| CN106298220A (en) | A kind of preparation method of the composite coating of motor Sintered NdFeB magnet | |
| CN109371391A (en) | A kind of mechanical zinc-plating process | |
| CN101117513A (en) | Method for preparing metal surface anticorrosive paint | |
| CN103757623A (en) | Titanate treatment fluid, surface treatment method for permanent magnet material and permanent magnet material | |
| CN104404441A (en) | Preparation method for copper-plated steel band | |
| WO2015044988A1 (en) | Coated, shaped metallic material | |
| CN112501668B (en) | Stainless steel surface treatment method with high adhesion to coating | |
| CN104952582A (en) | Novel permanently-magnetic material | |
| CN108950503B (en) | Sintered neodymium iron boron coating film and vacuum coating process thereof | |
| CN110639777A (en) | Amorphous product surface coating treatment method, magnetic core and magnetic powder core preparation method | |
| CN202925131U (en) | Electrophoretic coating device for surface treatment of railway fittings | |
| CN105457858A (en) | Electrostatic powder spraying method for valve casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220524 |
|
| RJ01 | Rejection of invention patent application after publication |