CN103611667A - Water-based inorganic-and-organic composite coating double-layer protection method for surface of Nd-Fe-B magnet material - Google Patents
Water-based inorganic-and-organic composite coating double-layer protection method for surface of Nd-Fe-B magnet material Download PDFInfo
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Abstract
The invention relates to the field of surface protection on Nd-Fe-B magnet materials, in particular to a water-based inorganic/organic composite coating double-layer protection method for the surface of an Nd-Fe-B magnet material. The water-based inorganic/organic composite coating double-layer protection method for the surface of the Nd-Fe-B magnet material comprises the steps of firstly, carrying out oil removal, rust removal and sanding on the Nd-Fe-B magnet material, then, coating the Nd-Fe-B magnet material with a water-based inorganic coating material to form an inorganic coating, and finally, coating the Nd-Fe-B magnet material with a water-based organic coating material to form an organic coating. According to the water-based inorganic/organic composite coating double-layer protection method for the surface of the Nd-Fe-B magnet material, in order to solve the problem that in the prior art, some surface protection methods such as the electroplating method, the chemical plating method and the solvent type coating method are complex in pre-processing, strict, serious in pollution, poor in anticorrosion performance and the like, water-based inorganic/organic composite coating double-layer protection is adopted, the problem that pollution is caused by protection of the Nd-Fe-B magnet material is solved, limitation in the aspect of application is removed, and the neutral salt fog corrosion resistance performance of the coatings is improved to a great extent on the premises that binding force between the coatings and a base body is ensured, and magnetic performance is not influenced.
Description
Technical field
The present invention relates to the surfacecti proteon field of Nd-Fe-B magnetic material, be specially a kind of Nd-Fe-B magnetic material aqueous surface inorganic/method of organic composite coating Double-protection.
Background technology
From nineteen eighty-three, since assistant river true man find neodymium iron boron magnetic body, because characteristic and the more traditional permanent-magnet material of cost performance of Sintered NdFeB magnet are excellent, be widely used in all trades and professions such as computer, motor, wind-driven generator, electric automobile, instrument and meter, magnetic drive bearing, high-fidelity loudspeaker, NMR imaging instrument and space flight and aviation omniselector, in emerging technology fields such as magnetic suspension trains, there is huge potential application foreground.China relies on rare earth resources advantage and production cost advantage, greatly develops neodymium iron boron magnetic body industry, has become the first in the world big producing country and consumption big country.
But, because Nd-Fe-B materials chemistry is active strong, corrosion-resistant, easily oxidized, cause its magnetic property to reduce, have a strong impact on its range of application.In order to improve Nd-Fe-B rare-earth permanent magnet surface oxidation-resistant decay resistance, people also start with from changing the compositions such as microstructure, interpolation Mo or Co+V, do a lot of work, but up to the present, relatively effective method still adopts face coat technology, by coating, stops air, moisture or other corrosive substance to permeate to improve the resistance to corrosion of magnet.
Existing surface treatment has plating, chemical plating, electrophoresis, vacuum moulding machine, paint spraying etc.; except single protective layer; also has the appearance of composite coating; such as: the English of defending the country, Ge Hongliang etc., a kind of protection new technology [P] of plating multilayer coating on surface of sintered Nd-Fe-B permanent magnet, Chinese invention patent; application number: 200810164199.6; carry out the Protective Research of neodymium iron boron surface multilayer coating, but at least will more than three layers just can reach better resistance to neutral salt spray performance, technique more complicated.Lin Fuwen, Wang Yue etc., the method [P] of the double-deck zn-ni alloy deposits of a kind of neodymium iron boron electroplating surface, Chinese invention patent, application number 200510048456.6, carried out the research to neodymium iron boron surface Duplex plating admiro, also be after two-layer plating, carry out passivation or soak insulated paint, more complicated operates.At present, the surface treatment of neodymium iron boron is mainly that it is main electroplating with chemical plating, and the corrosion resisting property of its coating is still in lower standard, but processing procedure is comparatively strict and complicated.
Therefore, have a kind of environmental protection to be developed, technique is simple, coating is thin, corrosion resisting property is good, guarantee the impregnable coating of adhesion, magnetic property of coating and matrix.
Summary of the invention:
For current plating, chemical plating, some process for protecting surface such as composite coating, seriously polluted and cannot meet neodymium iron boron in the problem such as rugged environment application comparatively, the object of this invention is to provide a kind of Nd-Fe-B magnetic material aqueous surface inorganic/method of organic composite coating Double-protection, adopt the process for treating surface of aqueous inorganic/organic composite coating Double-protection, the pollution problem of neodymium iron boron protection and the restriction in application have been solved, and in the adhesion that guarantees coating and matrix, under the impregnable prerequisite of magnetic property, improve largely the resistance to neutral salt spray corrosive nature of coating.
Technical scheme of the present invention is:
The inorganic organic composite coating Double-protection of a Nd-Fe-B magnetic material aqueous surface method, first, to neodymium iron boron oil removing, rust cleaning, sand papering; Then, neodymium iron boron is applied to one deck aqueous inorganic paint, form inorganic coating; Afterwards, then apply one deck water-based organic coating, be formed with organic coating.
The described inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface method, degreasing fluid is mixed by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent and water, and the content of each component is as follows:
NaOH 3～15g/L; Sodium carbonate 20～80g/L; Tertiary sodium phosphate 50～100g/L; Sodium metasilicate 5～15g/L; OP-10 emulsifying agent 0.2～3g/L; All the other are water.
The described inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface method, rust removing solution is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 2～10g/L; Nitric acid 20～80g/L; All the other are water.
The described inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface method, sand papering is first roughly ground with 150#, then uses 600# sand papering.
The described inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface method, by weight percentage, composition and the content range of aqueous inorganic paint are as follows:
Ethyl orthosilicate 5～15; Silane KH560:3～10; Zinc powder 15～30; Aluminium powder 4～10; Titanium valve 2～5; Aluminium oxide 1～4; Ethanol 5～20; All the other are water.
The described inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface method, by weight percentage, composition and the content range of water-based organic coating are as follows:
Water-based organic resin 10～60; Filler 3～25; Auxiliary agent 0.3～3; All the other are water.
The described inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface method, the filler of water-based organic coating is one or more inorganic fillers in aluminium powder, titanium valve, zinc powder, silica, aluminium oxide, zinc oxide, ferrotitanium powder, iron oxide red, copper powder, and the granularity of filler is 1000～2000 orders.
The described inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface method, water-based organic resin is one or more in aqueous epoxy resins, water-borne acrylic resin, water-based fluorocarbon resin, waterborne polyurethane resin.
The described inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface method, the thickness of aqueous inorganic coating is 5～15 μ m, the thickness of water-based organic coating is 3～10 μ m, and aqueous inorganic coating and water-based organic coating gross thickness are at 10～17 μ m.
Advantage of the present invention and beneficial effect:
1, the present invention adopts aqueous inorganic coating as bottom, coating Chrome-free, without toxic solvent, heavy metal free, pollutes, and than electroplating and Dacroment has certain superiority, and coating is thin, even if do not add confining bed, does not also have good corrosion resisting property.
2, the present invention adopts water-based organic coating as confining bed, has improved largely corrosion resisting property and the anti-wear performance of coating.
3, coating matching system of the present invention is perfect, and aqueous inorganic coating and basal body binding force are better, but adhesion between organic coating and water-based organic coating is greater than the adhesion between aqueous inorganic coating and matrix, shows good performance.
In a word, the present invention is in aqueous inorganic coating and water-based organic coating gross thickness during at 10～17 μ m, guaranteeing under the impregnable prerequisite of adhesion, potential difference of coating and matrix, there is better decay resistance, there is not corrosion in the resistance to neutral salt spray time, the even resistance to neutral salt spray time can reach 1500h corrosion does not occur more than 900h.
The specific embodiment
Nd-Fe-B magnetic material aqueous surface of the present invention is inorganic/method of organic composite coating Double-protection, first to neodymium iron boron oil removing, rust cleaning, sand papering; Then, neodymium iron boron is applied to one deck aqueous inorganic paint, form inorganic coating, coating layer thickness is that 5～15 μ m(are preferably 5～10 μ m); Afterwards, then apply one deck water-based organic coating, solidify to form organic coating, coating layer thickness is that 3～10 μ m(are preferably 3～7 μ m), aqueous inorganic coating and water-based organic coating gross thickness are at 10～17 μ m.
In the present invention, aqueous inorganic paint solidification temperature is 250 ℃ to 350 ℃, and the time is 10 minutes～90 minutes.Water-based organic coating solidification temperature is 100 ℃ to 260 ℃, and the time is 10 minutes～60 minutes.
The selected degreasing fluid of the present invention is mixed with water by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent etc., and the content of each component is as follows:
NaOH 3～15g/L; Sodium carbonate 20～80g/L; Tertiary sodium phosphate 50～100g/L; Sodium metasilicate 5～15g/L; OP-10 emulsifying agent 0.2～3g/L; All the other are water.
The selected rust removing solution of the present invention is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 2～10g/L; Nitric acid 20～80g/L; All the other are water.
The present invention polishes and first with 150#, roughly grinds neodymium iron boron sand for surface paper, then uses 600# sand papering.
In the present invention, the composition of aqueous inorganic paint and content range following (by weight percentage):
Ethyl orthosilicate 5～15; Silane KH560:3～10; Zinc powder 15～30; Aluminium powder 4～10; Titanium valve 2～5; Aluminium oxide 1～4; Ethanol 5～20; All the other are water.Wherein, the granularity of zinc powder, aluminium powder, titanium valve, aluminium oxide is 1000～2000 orders.
The present invention adopts specific aqueous inorganic paint, the design philosophy of its composition is: in water-based system, aluminum zinc powder is because existing potential difference easily to produce galvanic corrosion, here utilize ethyl orthosilicate and silane KH560 hydrolysis to carry out surface treatment to aluminum zinc powder, suppressed preferably galvanic corrosion, slowed down the corrosion of zinc-aluminium, adding of titanium valve and aluminium oxide is to improve coating current potential, improves coating pattern.In addition, ethyl orthosilicate and silane KH560 have filming function, through oversintering, can obtain fine and close inorganic coating.
In the present invention, the composition of water-based organic coating and content range following (by weight percentage):
Water-based organic resin 10～60; Filler 3～25; Auxiliary agent 0.3～3; All the other are solvent.
The selected water-based organic resin of the present invention is one or more in aqueous epoxy resins, water-borne acrylic resin, water-based fluorocarbon resin, waterborne polyurethane resin.
The filler of the organic coating that the present invention is selected is one or more inorganic fillers in aluminium powder, titanium valve, zinc powder, silica, aluminium oxide, zinc oxide, ferrotitanium powder, iron oxide red, copper powder, and the granularity of filler is 1000～2000 orders.
The selected auxiliary agent of the present invention is auxiliary agent conventional in organic coating, as: dispersant, levelling agent, defoamer etc.
The present invention adopts specific water-based organic coating, and the design philosophy of its composition is that this formula adopts filler and the specific water-base resin that particle diameter is little, and inorganic coating is had to good sealing process.
Aqueous inorganic coating of the present invention and water-based organic coating form the Double-protection to Nd-Fe-B magnetic material, wherein: aqueous inorganic coating is to change matrix current potential, and utilizes forming silane film to have good adhesion; Water-based organic coating role is to bottom sealing, produces potential difference with aqueous inorganic paint.It is good that the two synergy is issued to adhesion, and coating is fine and close, the effect that resistance to neutral salt spray is good.
Embodiment 1:
First, prepare sample, neodymium iron boron (50mm * 50mm * 5mm) is carried out to oil removing in alkaline degreasing liquid, with a large amount of water, clean up afterwards, then in acidic derusting liquid, eliminate rust, after massive laundering is dry, with 150# sand paper, polish, with 600# sand paper, polish again, use afterwards alcohol neodymium iron boron surface wiped clean.
Degreasing fluid is mixed by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent and water, and the content of each component is as follows:
NaOH 10g/L; Sodium carbonate 20g/L; Tertiary sodium phosphate 50g/L; Sodium metasilicate 5g/L; OP-10 emulsifying agent 0.2g/L; All the other are water.
Rust removing solution is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 2g/L; Nitric acid 80g/L; All the other are water.
By ready neodymium iron boron sample spraying one deck aqueous inorganic paint, by weight percentage, the present embodiment aqueous inorganic paint is evenly mixed by following component:
Ethyl orthosilicate 10; Silane KH560:4; Zinc powder 20(1000 order); Aluminium powder 8(1000 order); Titanium valve 2(1000 order); Aluminium oxide 1(1000 order); Ethanol 8; All the other are water.
The sample having sprayed is solidified at 300 ℃ to 30-60min, take out, coating is prepared complete, and the thickness of coating is 7～9 μ m.
Then surface is had the neodymium iron boron sample of inorganic coating to apply one deck water-based organo-aluminium coating, by weight percentage, the present embodiment water-based organo-aluminium coating is evenly mixed by following component:
Aqueous epoxy resins 30; Aluminium powder 15(1000 order); Dispersant (the German Bi Ke BYK-346 of chemical company) 0.3; Levelling agent (the German Bi Ke BYK-420 of chemical company) 0.4; Defoamer (the German Bi Ke BYK-019 of chemical company) 0.2; All the other are water.
Then, solidify 30-60min at 240 ℃, take out, coating is prepared complete, and the thickness of coating is 4～7 μ m, and total coating thickness is at 11～16 μ m.
The duplex coating adhesion of preparing by the method is good, and coating is fine and close, not corrosion of the 1300h of resistance to neutral salt spray.
Embodiment 2:
First, prepare sample, neodymium iron boron (50mm * 50mm * 5mm) is carried out to oil removing in alkaline degreasing liquid, with a large amount of water, clean up afterwards, then in acidic derusting liquid, eliminate rust, after massive laundering is dry, with 150# sand paper, polish, with 600# sand paper, polish again, use afterwards alcohol neodymium iron boron surface wiped clean.
Degreasing fluid is mixed by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent and water, and the content of each component is as follows:
NaOH 12g/L; Sodium carbonate 60g/L; Tertiary sodium phosphate 70g/L; Sodium metasilicate 10g/L; OP-10 emulsifying agent 2g/L; All the other are water.
Rust removing solution is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 6g/L; Nitric acid 70g/L; All the other are water.
By ready neodymium iron boron sample spraying one deck aqueous inorganic paint, by weight percentage, the present embodiment aqueous inorganic paint is evenly mixed by following component:
Ethyl orthosilicate 11; Silane KH560:6; Zinc powder 15(1200 order); Aluminium powder 10(1200 order); Titanium valve 3(1200 order); Aluminium oxide 3(1200 order); Ethanol 16; All the other are water.
The sample having sprayed is solidified at 320 ℃ to 30-60min, take out, coating is prepared complete, and the thickness of coating is 6～8 μ m.
Then surface is had the neodymium iron boron sample of inorganic coating to apply one deck water-based organic zinc, aluminium paint, by weight percentage, the present embodiment water-based organic zinc, aluminium paint are evenly mixed by following component:
Water-borne acrylic resin 20; Epoxy resin 20; Zinc powder 7(1200 order); Aluminium powder 13(1200 order); Dispersant (the German Bi Ke BYK-346 of chemical company) 0.4; Levelling agent (the German Bi Ke BYK-420 of chemical company) 0.5; Defoamer (the German Bi Ke BYK-020 of chemical company) 0.3; All the other are water.
Then, solidify 30-40min at 230 ℃, take out, coating is prepared complete, and the thickness of coating is 5～8 μ m, and total coating thickness is at 11～16 μ m.
The duplex coating adhesion of preparing by the method is good, and coating is fine and close, not corrosion of the 1200h of resistance to neutral salt spray.
Embodiment 3:
First, prepare sample, neodymium iron boron (50mm * 50mm * 5mm) is carried out to oil removing in alkaline degreasing liquid, with a large amount of water, clean up afterwards, then in acidic derusting liquid, eliminate rust, after massive laundering is dry, with 150# sand paper, polish, with 600# sand paper, polish again, use afterwards alcohol neodymium iron boron surface wiped clean.
Degreasing fluid is mixed by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent and water, and the content of each component is as follows:
NaOH 10g/L; Sodium carbonate 50g/L; Tertiary sodium phosphate 60g/L; Sodium metasilicate 7g/L; OP-10 emulsifying agent 3g/L; All the other are water.
Rust removing solution is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 8g/L; Nitric acid 60g/L; All the other are water.
By ready neodymium iron boron sample spraying one deck aqueous inorganic paint, by weight percentage, the present embodiment aqueous inorganic paint is evenly mixed by following component:
Ethyl orthosilicate 13; Silane KH560:5; Zinc powder 18(1500 order); Aluminium powder 7(1500 order); Titanium valve 3(1500 order); Aluminium oxide 3(1500 order); Ethanol 20; All the other are water.
The sample having sprayed is solidified at 290 ℃ to 30-60min, take out, coating is prepared complete, and the thickness of coating is 7～9 μ m.
Then surface is had the neodymium iron boron sample of inorganic coating to apply one deck water-based organic titanium coating, by weight percentage, the present embodiment water-based organic titanium coating is evenly mixed by following component:
Waterborne polyurethane resin 10; Water-borne acrylic resin 30; Titanium valve 8(1500 order); Dispersant (the German Bi Ke BYK-333 of chemical company) 0.5; Levelling agent (the German Bi Ke BYK-425 of chemical company) 0.3; Defoamer (the German Bi Ke BYK-028 of chemical company) 0.2; All the other are water.
Then, solidify 20-40min at 120 ℃, take out, coating is prepared complete, and the thickness of coating is 5～7 μ m, and total coating thickness is at 12～16 μ m.
The duplex coating adhesion of preparing by the method is good, and coating is fine and close, not corrosion of the 1000h of resistance to neutral salt spray.
Embodiment 4:
First, prepare sample, neodymium iron boron (50mm * 50mm * 5mm) is carried out to oil removing in alkaline degreasing liquid, with a large amount of water, clean up afterwards, then in acidic derusting liquid, eliminate rust, after massive laundering is dry, with 150# sand paper, polish, with 600# sand paper, polish again, use afterwards alcohol neodymium iron boron surface wiped clean.
Degreasing fluid is mixed by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent and water, and the content of each component is as follows:
NaOH 5g/L; Sodium carbonate 65g/L; Tertiary sodium phosphate 80g/L; Sodium metasilicate 10g/L; OP-10 emulsifying agent 0.7g/L; All the other are water.
Rust removing solution is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 3g/L; Nitric acid 75g/L; All the other are water.
By ready neodymium iron boron sample spraying one deck aqueous inorganic paint, by weight percentage, the present embodiment aqueous inorganic paint is evenly mixed by following component:
Ethyl orthosilicate 8; Silane KH560:10; Zinc powder 20(1800 order); Aluminium powder 7(1800 order); Titanium valve 2(1800 order); Aluminium oxide 4(1800 order); Ethanol 16; All the other are water.
The sample having sprayed is solidified at 280 ℃ to 30-60min, take out, coating is prepared complete, and the thickness of coating is 6～9 μ m.
Then surface is had the neodymium iron boron sample of inorganic coating to apply one deck water-based organo-aluminium, silica coating, by weight percentage, the present embodiment water-based organo-aluminium, silica coating are evenly mixed by following component:
Water-based fluorocarbon resin 20; Aluminium powder 19(1800 order); Silica 3(1800 order); Dispersant (the German Bi Ke BYK-346 of chemical company) 0.6; Levelling agent (the German Bi Ke BYK-420 of chemical company) 0.2; Defoamer (the German Bi Ke BYK-020 of chemical company) 0.3; All the other are water.
Then, solidify 20-30min at 100 ℃, take out, coating is prepared complete, and the thickness of coating is 5～7 μ m, and total coating thickness is at 11～16 μ m.
The duplex coating adhesion of preparing by the method is good, and coating is fine and close, not corrosion of the 1300h of resistance to neutral salt spray.
Embodiment 5:
First, prepare sample, neodymium iron boron (50mm * 50mm * 5mm) is carried out to oil removing in alkaline degreasing liquid, with a large amount of water, clean up afterwards, then in acidic derusting liquid, eliminate rust, after massive laundering is dry, with 150# sand paper, polish, with 600# sand paper, polish again, use afterwards alcohol neodymium iron boron surface wiped clean.
Degreasing fluid is mixed by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent and water, and the content of each component is as follows:
NaOH 8g/L; Sodium carbonate 65g/L; Tertiary sodium phosphate 85g/L; Sodium metasilicate 9g/L; OP-10 emulsifying agent 0.5g/L; All the other are water.
Rust removing solution is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 5g/L; Nitric acid 60g/L; All the other are water.
By ready neodymium iron boron sample spraying one deck aqueous inorganic paint, by weight percentage, the present embodiment aqueous inorganic paint is evenly mixed by following component:
Ethyl orthosilicate 10; Silane KH5605; Zinc powder 20(1600 order); Aluminium powder 8(1600 order); Titanium valve 3(1600 order); Aluminium oxide 4(1600 order); Ethanol 16; All the other are water.
The sample having sprayed is solidified at 310 ℃ to 30-60min, take out, coating is prepared complete, and the thickness of coating is 6～7 μ m.
Then surface is had the neodymium iron boron sample of inorganic coating to apply one deck water-based organo-aluminium, aluminium oxide coating, by weight percentage, the present embodiment water-based organo-aluminium, aluminium oxide coating are evenly mixed by following component:
Aqueous epoxy resins 15; Waterborne polyurethane resin 10; Aluminium powder 15(1600 order); Alumina powder 5(1600 order); Dispersant (the German Bi Ke BYK-346 of chemical company) 0.4; Levelling agent (the German Bi Ke BYK-420 of chemical company) 0.3; Defoamer (the German Bi Ke BYK-019 of chemical company) 0.3; All the other are water.
Then, solidify 10-30min at 190 ℃, take out, coating is prepared complete, and the thickness of coating is 4～6 μ m, and total coating thickness is at 10～13 μ m.
The duplex coating adhesion of preparing by the method is good, and coating is fine and close, not corrosion of the 1000h of resistance to neutral salt spray.
Embodiment 6:
First, prepare sample, neodymium iron boron (50mm * 50mm * 5mm) is carried out to oil removing in alkaline degreasing liquid, with a large amount of water, clean up afterwards, then in acidic derusting liquid, eliminate rust, after massive laundering is dry, with 150# sand paper, polish, with 600# sand paper, polish again, use afterwards alcohol neodymium iron boron surface wiped clean.
Degreasing fluid is mixed by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent and water, and the content of each component is as follows:
NaOH 7g/L; Sodium carbonate 30g/L; Tertiary sodium phosphate 55g/L; Sodium metasilicate 13g/L; OP-10 emulsifying agent 0.9g/L; All the other are water.
Rust removing solution is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 6g/L; Nitric acid 75g/L; All the other are water.
By ready neodymium iron boron sample spraying one deck aqueous inorganic paint, by weight percentage, the present embodiment aqueous inorganic paint is evenly mixed by following component:
Ethyl orthosilicate 12; Silane KH560:7; Zinc powder 19(2000 order); Aluminium powder 9(2000 order); Titanium valve 4(2000 order); Aluminium oxide 2(2000 order); Ethanol 18; All the other are water.
The sample having sprayed is solidified at 300 ℃ to 30-60min, take out, coating is prepared complete, and the thickness of coating is 7～9 μ m.
Then surface is had the neodymium iron boron sample of inorganic coating to apply one deck water-based organo-aluminium, titanium coating, by weight percentage, the present embodiment water-based organo-aluminium, titanium coating are evenly mixed by following component:
Waterborne polyurethane resin 25; Aluminium powder 10(2000 order); Titanium valve 10(2000 order); Dispersant (the German Bi Ke BYK-346 of chemical company) 0.5; Levelling agent (the German Bi Ke BYK-420 of chemical company) 0.5; Defoamer (the German Bi Ke BYK-020 of chemical company) 0.5; All the other are water.
Then, solidify 30-40min at 180 ℃, take out, coating is prepared complete, and the thickness of coating is 4～8 μ m, and total coating thickness is at 11～17 μ m.
The duplex coating adhesion of preparing by the method is good, and coating is fine and close, not corrosion of the 900h of resistance to neutral salt spray.
Embodiment result shows, the present invention is directed to some problems such as some process for protecting surface complex pretreatment such as current plating, chemical plating, solvent-based coating, harshness, seriously polluted and antiseptic property be poor, first to neodymium iron boron oil removing, rust cleaning, sand papering, then neodymium iron boron is applied to one deck aqueous inorganic paint, form inorganic coating; Afterwards, then apply one deck water-based organic coating, be formed with organic coating.Adopt aqueous inorganic/organic composite coating Double-protection, the pollution problem of neodymium iron boron protection and the restriction in application have been solved, and guaranteeing, under the impregnable prerequisite of adhesion, magnetic property of coating and matrix, to improve largely the resistance to neutral salt spray corrosive nature of coating.
Claims (9)
1. the inorganic organic composite coating Double-protection of a Nd-Fe-B magnetic material aqueous surface method, is characterized in that, first, and to neodymium iron boron oil removing, rust cleaning, sand papering; Then, neodymium iron boron is applied to one deck aqueous inorganic paint, form inorganic coating; Afterwards, then apply one deck water-based organic coating, be formed with organic coating.
2. according to the inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface claimed in claim 1 method, it is characterized in that, degreasing fluid is mixed by NaOH, sodium carbonate, tertiary sodium phosphate, sodium metasilicate, OP-10 emulsifying agent and water, and the content of each component is as follows:
NaOH 3～15g/L; Sodium carbonate 20～80g/L; Tertiary sodium phosphate 50～100g/L; Sodium metasilicate 5～15g/L; OP-10 emulsifying agent 0.2～3g/L; All the other are water.
3. according to the inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface claimed in claim 1 method, it is characterized in that, rust removing solution is mixed by hydrochloric acid, nitric acid, and the content of each component is as follows:
Hydrochloric acid 2～10g/L; Nitric acid 20～80g/L; All the other are water.
4. according to the inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface claimed in claim 1 method, it is characterized in that, sand papering is first roughly ground with 150#, then uses 600# sand papering.
5. according to the inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface claimed in claim 1 method, it is characterized in that, by weight percentage, composition and the content range of aqueous inorganic paint are as follows:
Ethyl orthosilicate 5～15; Silane KH560:3～10; Zinc powder 15～30; Aluminium powder 4～10; Titanium valve 2～5; Aluminium oxide 1～4; Ethanol 5～20; All the other are water.
6. according to the inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface claimed in claim 1 method, it is characterized in that, by weight percentage, composition and the content range of water-based organic coating are as follows:
Water-based organic resin 10～60; Filler 3～25; Auxiliary agent 0.3～3; All the other are water.
7. according to the inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface claimed in claim 6 method, it is characterized in that, the filler of water-based organic coating is one or more inorganic fillers in aluminium powder, titanium valve, zinc powder, silica, aluminium oxide, zinc oxide, ferrotitanium powder, iron oxide red, copper powder, and the granularity of filler is 1000～2000 orders.
8. according to the inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface claimed in claim 6 method, it is characterized in that, water-based organic resin is one or more in aqueous epoxy resins, water-borne acrylic resin, water-based fluorocarbon resin, waterborne polyurethane resin.
9. according to the inorganic organic composite coating Double-protection of Nd-Fe-B magnetic material aqueous surface claimed in claim 1 method, it is characterized in that, the thickness of aqueous inorganic coating is 5～15 μ m, the thickness of water-based organic coating is 3～10 μ m, and aqueous inorganic coating and water-based organic coating gross thickness are at 10～17 μ m.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100173068A1 (en) * | 1994-05-26 | 2010-07-08 | University Of Iowa Research Foundation | Methods for forming magnetically modified electrodes and articles produced thereby |
| CN102443834A (en) * | 2011-12-12 | 2012-05-09 | 南昌航空大学 | Preparation method of particle-enhanced organic anticorrosive coating on surface of neodymium-iron-boron permanent magnet material |
| CN102534697A (en) * | 2011-12-08 | 2012-07-04 | 中国科学院金属研究所 | Nickel plating/organic coating double-layer surface protection method for NdFeB (neodymium-iron-boron) magnet material |
| CN102653643A (en) * | 2012-04-24 | 2012-09-05 | 包头稀土研究院 | Zinc-based composite coating for improving corrosion resistance of neodymium-iron-boron magnet |
-
2013
- 2013-11-28 CN CN201310629312.4A patent/CN103611667B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100173068A1 (en) * | 1994-05-26 | 2010-07-08 | University Of Iowa Research Foundation | Methods for forming magnetically modified electrodes and articles produced thereby |
| CN102534697A (en) * | 2011-12-08 | 2012-07-04 | 中国科学院金属研究所 | Nickel plating/organic coating double-layer surface protection method for NdFeB (neodymium-iron-boron) magnet material |
| CN102443834A (en) * | 2011-12-12 | 2012-05-09 | 南昌航空大学 | Preparation method of particle-enhanced organic anticorrosive coating on surface of neodymium-iron-boron permanent magnet material |
| CN102653643A (en) * | 2012-04-24 | 2012-09-05 | 包头稀土研究院 | Zinc-based composite coating for improving corrosion resistance of neodymium-iron-boron magnet |
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