CN103938241B - A kind of method strengthening Nd-Fe-B permanent magnet antiseptic property - Google Patents
A kind of method strengthening Nd-Fe-B permanent magnet antiseptic property Download PDFInfo
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- CN103938241B CN103938241B CN201410137539.1A CN201410137539A CN103938241B CN 103938241 B CN103938241 B CN 103938241B CN 201410137539 A CN201410137539 A CN 201410137539A CN 103938241 B CN103938241 B CN 103938241B
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- permanent magnet
- antiseptic property
- rete
- processing technique
- plated
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- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 61
- 230000002421 anti-septic effect Effects 0.000 title claims abstract description 37
- 238000005728 strengthening Methods 0.000 title claims abstract description 30
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 69
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000011248 coating agent Substances 0.000 claims abstract description 33
- 238000000576 coating method Methods 0.000 claims abstract description 33
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 17
- 239000010408 film Substances 0.000 claims abstract description 14
- 230000008020 evaporation Effects 0.000 claims abstract description 13
- 238000001704 evaporation Methods 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 238000002203 pretreatment Methods 0.000 claims abstract description 11
- 239000010409 thin film Substances 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 5
- 238000005566 electron beam evaporation Methods 0.000 claims description 5
- 238000009713 electroplating Methods 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 230000002708 enhancing effect Effects 0.000 claims 4
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The invention discloses a kind of method strengthening Nd-Fe-B permanent magnet antiseptic property, comprise the following steps: the first step: pre-treatment, Nd-Fe-B permanent magnet is carried out oil removing, rinsing；Second step: plated metal nickel rete, plates layer of metal nickel rete at surface of Nd-Fe-B permanent magnet；3rd step: plate layer of silicon dioxide thin film again at metallic nickel film surface.Compared with prior art, the invention has the beneficial effects as follows: first at surface of Nd-Fe-B permanent magnet plated metal nickel rete, again through the processing technique of evaporation coating at nickel coating plated surface last layer silica membrane, rete porosity can be efficiently reduced, the surface making plated film becomes fine and close, clearly enhance the antiseptic property of Nd-Fe-B permanent magnet, the thickness of silica membrane layer will not significantly increase simultaneously, export without influence on its magnetic, and safety and environmental protection in the process produced, meets the environmental requirement of country.
Description
Technical field
The invention belongs to the technical field of surface of material, relate to a kind of method strengthening Nd-Fe-B permanent magnet antiseptic property.
Background technology
The advantage of ndfeb magnet is that cost performance is high, has good mechanical property；Being disadvantageous in that Curie point is low, temperature characterisitic is poor, and is prone to dusting corrosion, it is necessary to by adjusting its chemical composition and taking surface treatment method so as to improved, can be only achieved the requirement of practical application.
Neodymium in Nd-Fe-B permanent magnet is a kind of rare earth element, and chemism is very strong, is oxidized easily in atmosphere, and corrosion resistance is poor, and in Nd-Fe-B permanent magnet material richness B phase, rich-Nd phase, Nd2Fe14The electrochemical potentials of B phase is different, and rich-Nd phase and rich B phase electrode potential are lower than matrix Nd2Fe14B phase, forms electrochemistry micro cell, rich-Nd phase and rich B phase in damp and hot environment and is first corroded, and time serious, the oxide and the hydride that produce a large amount of Nd make material efflorescence, thus causing the hydraulic performance decline of magnet.So general all anticorrosive coats on the plated surface of Nd-Fe-B permanent magnet.Coating for protection against corrosion on Nd-Fe-B permanent magnet is nickel coating mostly, and nickel coating is cathodic electrodeposition coating, and without electro-chemical protection, when coating exists hole, matrix can be first subjected to corrosion, consequently only that coating just plays a protective role when dense non-porous.Coating is more thin, and porosity is more high, it is ensured that the anticorrosive property of nickel coating, and generally coating to reach more than 20um.But the too thick magnetic output that can shield Nd-Fe-B permanent magnet of metallic nickel rete, affects its result of use.
Summary of the invention
The present invention needs the problems referred to above solved to be thin for above-mentioned prior art coating, and porosity is high, and anticorrosive property is poor；Coating thickness can shield the magnetic output of Nd-Fe-B permanent magnet, affects the deficiency of its result of use, and provides a kind of coating thin and the strong method strengthening Nd-Fe-B permanent magnet antiseptic property of Corrosion Protection.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of method strengthening Nd-Fe-B permanent magnet antiseptic property, comprises the following steps:
The first step: pre-treatment, carries out oil removing, rinsing by Nd-Fe-B permanent magnet；
Second step: plated metal nickel rete, plates layer of metal nickel rete at surface of Nd-Fe-B permanent magnet；
3rd step: plate layer of silicon dioxide thin film again at metallic nickel film surface.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique of pre-treatment is, first uses acetone soln ultrasonic cleaning Nd-Fe-B permanent magnet 20 minutes-25 minutes, again with dehydrated alcohol ultrasonic cleaning 10 minutes-15 minutes after taking-up, dries up standby.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique of plated metal nickel rete is that cleaned Nd-Fe-B permanent magnet is placed among nickel plating solution, in temperature is: 45 DEG C-55 DEG C, carrying out electronickelling when pH=4.0-5.0, electric current density is 1A/dm2-1.2A/dm2, electroplating time is 30min-45min.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique that applying silicon oxide thin film adopts is evaporation coating.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, described evaporation coating processing technique is, with vacuum electron beam evaporation coating machine, the temperature of Nd-Fe-B permanent magnet controls at 220 DEG C-250 DEG C, and vacuum is maintained at 6.67 × 10-3Pa-1.07×10-2Pa, the bombarding current of electron gun controls between 4.0A-4.5A, accelerates pole tension 3000V-3200V, is evaporated plated film with this understanding 20 seconds-25 seconds.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the thickness of described silica membrane layer is 50nm-80nm.
Compared with prior art, the invention has the beneficial effects as follows: first at surface of Nd-Fe-B permanent magnet plated metal nickel rete, again through the processing technique of evaporation coating at nickel coating plated surface last layer silica membrane, rete porosity can be efficiently reduced, the surface making plated film becomes fine and close, clearly enhance the antiseptic property of Nd-Fe-B permanent magnet, the thickness of silica membrane layer will not significantly increase simultaneously, export without influence on its magnetic, and safety and environmental protection in the process produced, meets the environmental requirement of country.
Detailed description of the invention
The following detailed description of the preferred technical solution of the present invention.
Embodiment 1
A kind of method strengthening Nd-Fe-B permanent magnet antiseptic property, comprises the following steps:
The first step: pre-treatment, carries out oil removing, rinsing by Nd-Fe-B permanent magnet；
Second step: plated metal nickel rete, plates layer of metal nickel rete at surface of Nd-Fe-B permanent magnet；
3rd step: plate layer of silicon dioxide thin film again at metallic nickel film surface.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique of pre-treatment is, first uses acetone soln ultrasonic cleaning Nd-Fe-B permanent magnet 20 minutes, again with dehydrated alcohol ultrasonic cleaning 10 minutes after taking-up, dries up standby.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique of plated metal nickel rete is that cleaned Nd-Fe-B permanent magnet is placed among nickel plating solution, in temperature is: 50 DEG C, carries out electronickelling when pH=4.5, and electric current density is 1A/dm2, electroplating time is 30min.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique that applying silicon oxide thin film adopts is evaporation coating.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, described evaporation coating processing technique is, with vacuum electron beam evaporation coating machine, the temperature of Nd-Fe-B permanent magnet controls at 220 DEG C, and vacuum is maintained at 8 × 10-3Pa, the bombarding current of electron gun controls between 4.0A, accelerates pole tension 3000V, is evaporated plated film with this understanding 20 seconds.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the thickness of described silica membrane layer is 50nm, and thicknesses of layers is relatively thin, and the magnetic without influence on Nd-Fe-B permanent magnet exports.
Embodiment 2
A kind of method strengthening Nd-Fe-B permanent magnet antiseptic property, comprises the following steps:
The first step: pre-treatment, carries out oil removing, rinsing by Nd-Fe-B permanent magnet；
Second step: plated metal nickel rete, plates layer of metal nickel rete at surface of Nd-Fe-B permanent magnet；
3rd step: plate layer of silicon dioxide thin film again at metallic nickel film surface.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique of pre-treatment is, first uses acetone soln ultrasonic cleaning Nd-Fe-B permanent magnet 20 minutes, again with dehydrated alcohol ultrasonic cleaning 15 minutes after taking-up, dries up standby.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique of plated metal nickel rete is that cleaned Nd-Fe-B permanent magnet is placed among nickel plating solution, in temperature is: 48 DEG C, carries out electronickelling when pH=4.3, and electric current density is 1A/dm2, electroplating time is 35min.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique that applying silicon oxide thin film adopts is evaporation coating.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, described evaporation coating processing technique is, with vacuum electron beam evaporation coating machine, the temperature of Nd-Fe-B permanent magnet controls at 220 DEG C, and vacuum is maintained at 1.0 × 10-2Pa, the bombarding current of electron gun controls between 4.5A, accelerates pole tension 3100V, is evaporated plated film with this understanding 25 seconds.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the thickness of described silica membrane layer is 80nm, and thicknesses of layers is relatively thin, and the magnetic without influence on Nd-Fe-B permanent magnet exports.
Embodiment 3
A kind of method strengthening Nd-Fe-B permanent magnet antiseptic property, comprises the following steps:
The first step: pre-treatment, carries out oil removing, rinsing by Nd-Fe-B permanent magnet；
Second step: plated metal nickel rete, plates layer of metal nickel rete at surface of Nd-Fe-B permanent magnet；
3rd step: plate layer of silicon dioxide thin film again at metallic nickel film surface.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique of pre-treatment is, first uses acetone soln ultrasonic cleaning Nd-Fe-B permanent magnet 25 minutes, again with dehydrated alcohol ultrasonic cleaning 15 minutes after taking-up, dries up standby.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique of plated metal nickel rete is that cleaned Nd-Fe-B permanent magnet is placed among nickel plating solution, in temperature is: 53 DEG C, carrying out electronickelling when pH=4.6, electric current density is 1.1A/dm2, electroplating time is 40min.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the processing technique that applying silicon oxide thin film adopts is evaporation coating.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, described evaporation coating processing technique is, with vacuum electron beam evaporation coating machine, the temperature of Nd-Fe-B permanent magnet controls at 250 DEG C, and vacuum is maintained at 7.15 × 10-3Pa, the bombarding current of electron gun controls between 4.0A, accelerates pole tension 3000V, is evaporated plated film with this understanding 23 seconds.
The described method strengthening Nd-Fe-B permanent magnet antiseptic property, the thickness of described silica membrane layer is 60nm, and thicknesses of layers is relatively thin, and the magnetic without influence on Nd-Fe-B permanent magnet exports.
Compared with prior art, the invention has the beneficial effects as follows: first at surface of Nd-Fe-B permanent magnet plated metal nickel rete, again through the processing technique of evaporation coating at nickel coating plated surface last layer silica membrane, rete porosity can be efficiently reduced, the surface making plated film becomes fine and close, clearly enhance the antiseptic property of Nd-Fe-B permanent magnet, the thickness of silica membrane layer will not significantly increase simultaneously, export without influence on its magnetic, and safety and environmental protection in the process produced, meets the environmental requirement of country.
The above example that is embodied as is only capable of the reference as the present invention rather than limitation of the present invention.
Claims (5)
1. the method strengthening Nd-Fe-B permanent magnet antiseptic property, it is characterised in that: comprise the following steps:
The first step: pre-treatment, carries out oil removing, rinsing by Nd-Fe-B permanent magnet；
Second step: plated metal nickel rete, plates layer of metal nickel rete at surface of Nd-Fe-B permanent magnet；
3rd step: plate layer of silicon dioxide thin film again at metallic nickel film surface；
The processing technique that applying silicon oxide thin film adopts is evaporation coating.
2. the method for enhancing Nd-Fe-B permanent magnet antiseptic property according to claim 1, it is characterized in that: the processing technique of pre-treatment is, first use acetone soln ultrasonic cleaning Nd-Fe-B permanent magnet 20 minutes-25 minutes, again with dehydrated alcohol ultrasonic cleaning 10 minutes-15 minutes after taking-up, dry up standby.
3. the method for enhancing Nd-Fe-B permanent magnet antiseptic property according to claim 1, it is characterized in that: the processing technique of plated metal nickel rete is, cleaned Nd-Fe-B permanent magnet is placed among nickel plating solution, in temperature it is: 45 DEG C-55 DEG C, carrying out electronickelling when pH=4.0-5.0, electric current density is 1A/dm2-1.2A/dm2, electroplating time is 30min-45min.
4. the method for enhancing Nd-Fe-B permanent magnet antiseptic property according to claim 1, it is characterized in that: described evaporation coating processing technique is, with vacuum electron beam evaporation coating machine, the temperature of Nd-Fe-B permanent magnet controls at 220 DEG C-250 DEG C, and vacuum is maintained at 6.67 × 10-3Pa-1.07×10-2Pa, the bombarding current of electron gun controls between 4.0A-4.5A, accelerates pole tension 3000V-3200V, is evaporated plated film with this understanding 20 seconds-25 seconds.
5. the method for enhancing Nd-Fe-B permanent magnet antiseptic property according to claim 1, it is characterised in that: the thickness of described silica membrane layer is 50nm-80nm.
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| CN201410137539.1A CN103938241B (en) | 2014-04-08 | 2014-04-08 | A kind of method strengthening Nd-Fe-B permanent magnet antiseptic property |
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| CN103938241A CN103938241A (en) | 2014-07-23 |
| CN103938241B true CN103938241B (en) | 2016-06-29 |
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| CN110093646B (en) * | 2019-04-26 | 2024-04-26 | 厦门建霖健康家居股份有限公司 | Electroplating method of magnetic attraction structure |
| CN110983333A (en) * | 2019-12-06 | 2020-04-10 | 东莞中探探针有限公司 | Neodymium-iron-boron composite coating and preparation method and application thereof |
| CN113718251A (en) * | 2021-08-25 | 2021-11-30 | 深圳市金源康实业有限公司 | Plastic surface coating structure and preparation method thereof |
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2014
- 2014-04-08 CN CN201410137539.1A patent/CN103938241B/en not_active Expired - Fee Related
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| JPS60243283A (en) * | 1984-05-16 | 1985-12-03 | Citizen Watch Co Ltd | External parts for timepiece |
| US5901893A (en) * | 1997-11-21 | 1999-05-11 | Eastman Kodak Company | Apparatus and method for conveying a web |
| CN1563486A (en) * | 2004-03-16 | 2005-01-12 | 华东理工大学 | Method for carrying out hole sealing by using fol of silicie acid on plating surface of nickel-phosphor alloy |
| CN1900361A (en) * | 2006-07-14 | 2007-01-24 | 西南大学 | Process for preparing neodymium-iron-boron permanent magnetic material surface gradient function coating layer |
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