CN105315821A - Anti-decarbonization nano coating and preparation method thereof - Google Patents
Anti-decarbonization nano coating and preparation method thereof Download PDFInfo
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- CN105315821A CN105315821A CN201410337179.XA CN201410337179A CN105315821A CN 105315821 A CN105315821 A CN 105315821A CN 201410337179 A CN201410337179 A CN 201410337179A CN 105315821 A CN105315821 A CN 105315821A
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- diatomite
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- nanometer
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000005262 decarbonization Methods 0.000 title abstract 3
- 239000002103 nanocoating Substances 0.000 title abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 238000005261 decarburization Methods 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000725 suspension Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000000243 solution Substances 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 239000003973 paint Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000012047 saturated solution Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 4
- 229920000058 polyacrylate Polymers 0.000 claims description 4
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical group O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- -1 polyoxyethylene Polymers 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 229940080314 sodium bentonite Drugs 0.000 claims description 2
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 25
- 239000011248 coating agent Substances 0.000 abstract description 23
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 229910052593 corundum Inorganic materials 0.000 abstract 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 3
- 239000005909 Kieselgur Substances 0.000 abstract 2
- 239000002270 dispersing agent Substances 0.000 abstract 2
- 238000002156 mixing Methods 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 4
- 238000007669 thermal treatment Methods 0.000 description 4
- 230000003064 anti-oxidating effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000003980 solgel method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
An anti-decarbonization nano coating and a preparation method thereof, wherein the coating comprises the following components in percentage by weight: 5-20% of nano Al2O350-80% of diatomite, 2-10% of graphite powder, 5-20% of binder, 1-3% of suspension dispersant and the balance of solvent and impurities. Mixing Al (NO)3)3And NH4HCO3Respectively preparing Al (NO)3)3And NH4HCO3An aqueous solution; to diatomaceous earth and NH4HCO3Adding Al (NO) to the suspension3)3Solution, reaction of Al (OH) formed3Filtering and washing the precipitate to obtain nano Al (OH)3And a diatomaceous earth mixture; the mixture is heated and dehydrated to form nano Al2O3(ii) a Mixing nano Al2O3Adding solvent, graphite powder, binder and suspending dispersant into the mixture of diatomite, and stirring to obtain the final productNanometer anti-decarbonization slurry. The nano coating has the advantages of uniform granularity, small size structure, good dispersibility, low cost, simple and easy preparation and coating process, strong natural stripping capability, capability of effectively preventing the high-temperature oxidation and decarburization of a steel plate, and suitability for various metal workpieces with complex shapes and precision processing.
Description
Technical field
The invention belongs to metal finishing Material Field, particularly relate to and a kind ofly prevent nano paint of metal works high temperature oxidation decarburization in oxidizing atmosphere and preparation method thereof.
Background technology
Metal Materials At High Temperature heating is a kind of common working method.Such as material heat treatment produces solid-state phase changes by heating metal, being incubated and cool, and reaches and change its internal organizational structure, eliminate material defect, the object of crystal grain thinning.The final work-ing life realizing prolongation metallic element, the object of environmental protection and energy saving.During heat, if the carbon of metallic surface contact with oxidizing atmosphere can cause be oxidized, the generation of decarburization phenomenon.And along with the increase of metal surface and inner carbon concentration difference aggravates decarburization phenomenon further.Thus cause the intensity of workpiece, the decline of the mechanical property such as hardness and wear resistance.The appearance of quenching crack even can be caused during thermal treatment.The common method of current head it off has two kinds: one to be adopt vacuum furnace to carry out heat treated to sample; Two is spray anti-decarburizing coating at specimen surface.Vacuum oven equipment is complicated, and cost is high, and narrower by workpiece shapes shape restriction range of application.And antioxidizing paint has easy to use, that cost is low, effective feature, be widely used.
High-quality coating should have that Heat stability is good, coating are fine and close, thixotropy and the feature such as rheological is good.Because nano material has unique surface effects and small-size effect, cause its fusing point to reduce, meltbility is good.And the tiling of nano particle comparatively plain particles is good, and porosity is low, bonding strength is large, and hardness is high.Therefore add a little nanoparticle component, coating reaction activity can be increased, thus technically without the need to the too large cost of cost, the function of traditional coating is got a qualitative improvement.
The patent of invention of publication number CN102352142A discloses a kind of high-temperature nano masking paste, with the addition of Nano-Scaled Carbide and nitride in this formulation for coating material, have high temperature-proof carburizing, high heat conductance, with matrix part have good bonding strength, with molten iron infiltrate the feature eliminating air gap performance.But do not relate to the preparation method of nanometer additive in this patent.If directly purchase, can increase coating cost, limit applying of this product.
Publication number CN1632137A patent of invention discloses a kind of preparation method from peeling off high-temp antioxidizing/decarburization coated material.This coating composition, for reaching interpolation Nano grade, needs vitreum matrix by the TiO allocated by proportioning
2, SiO
2, Al
2o
3with glass powder tumbling ball mill ball milling 24 hours.This method increase process energy consumption, and after ball milling, size distribution accurately cannot control, unstable product quality.
Summary of the invention
The object of this invention is to provide one and have that effect of preventing decarburization is good, cost is low, nano level high-temp antioxidizing/decarburizing coating simple to operate and preparation method thereof.Utilize sol-gel method fabricated in situ nanometer Al
2o
3particle, and by its uniform loading in diatomite surface, ensure that the nano-scale dimension composition of coating.
For this reason, the solution that the present invention takes is:
A kind of anti-decarburization nano paint, its moiety and wt% are: nanometer Al
2o
35 ~ 20%, diatomite 50 ~ 80%, Graphite Powder 99 2 ~ 10%, binding agent 5 ~ 20%, suspension dispersive agent 1 ~ 3%, surplus is solvent and impurity.
Described binding agent is one or both in water-soluble cpds polyacrylate or polyoxyethylene glycol.Described polyacrylate to be molecular weight be 15000 ~ 30000 sodium polyacrylate and polyacrylic acid potassium; Described molecular weight polyethylene glycol is 2000 ~ 8000.
Described suspension dispersive agent is sodium bentonite and carboxymethyl cellulose;
Described solvent is water and alcohol.
Described nanometer Al
2o
3granularity is 20 ~ 100nm.
A preparation method for anti-decarburization nano paint, its concrete preparation process is:
1, take by quality proportioning: Al (NO
3)
321 ~ 84 parts, NH
4hCO
324 ~ 93 parts, 50 ~ 80 parts, diatomite, Graphite Powder 99 2 ~ 10 parts, binding agent 5 ~ 20 parts, suspension dispersive agent 1 ~ 3 part, for subsequent use;
2, by Al (NO
3)
3and NH
4hCO
3be dissolved in respectively in deionized water, be mixed with Al (NO
3)
3saturated solution and NH
4hCO
3saturated solution;
3, diatomite is added NH
4hCO
3stir into suspension liquid in solution, while stirring, add Al (NO wherein lentamente
3)
3solution reacts, and generates by the Al of diatomite high dispersing (OH)
3throw out;
4, the throw out filtration washing will generated, obtains by nanometer Al (OH)
3with the mixture of diatomite composition;
5, this mixture is heated 30min at 200 ~ 300 DEG C, make nanometer Al (OH)
3dehydration forms nanometer Al
2o
3;
6, the nanometer Al will obtained after reaction
2o
3add solvent, Graphite Powder 99, binding agent and suspension dispersive agent with in diatomite mixture, after stirring, form nanometer anticreep carbon pastes.
The using method of coating of the present invention and beneficial effect are:
During use, first clean out the floating sand of surface of steel workpiece, dust, impurity such as oil rust etc., then use the instrument such as spray gun, roller brush, with artificial or mechanical painting way by paint at pending workpiece surface, coat-thickness is 0.1 ~ 1.0mm.After heating cooling, due to the difference of the thermal expansivity of steel workpiece and coated material, coating is caused naturally to be peeled off.
SiO in diatomite
2be the main formation of glass, the physical strength of coating can be improved, Al
2o
3the effect of reinforced glass network structure can be played, improve the vitrifying ability of coating.The small-size effect that nano material has can improve Al
2o
3reactive behavior, reduces fusing point, thus promotes coating sintering when thermal treatment is heated, and makes coating wrap up steel billet densely, plays a good protection.
The present invention prepares the anti-decarburizing coating of nano-scale particle by sol-gel method original position, formed the colloid of nano particle by chemical reaction, allow it be disperseed by other carrier height in reaction process simultaneously, form uniform granularity, dimensional structure is little, the nano paint of good dispersity.The nano paint adopting sol-gel method to prepare can effectively prevent steel plate high temperature oxidation and decarburization, is environment protecting water-based paint, Nano grade, is applicable to various complicated shape, precision machined metal works.This coated material is easy to use, with low cost, preparation and coating processes simple, by force, suitability is wide for self-flaking performance.
Accompanying drawing explanation
Fig. 1 is without microstructure after the process of coating protection steel plate hot;
Fig. 2 is microstructure after the process of nano paint protection steel plate hot.
Embodiment
The present invention is further described by the following embodiment.
Embodiment 1
Anti-decarburization nano paint each chemical composition quality is as shown in table 1:
Table 1 embodiment 1 prepares raw material and the proportioning of coating
Al (NO is taken according to table 1
3)
3and NH
4hCO
3be dissolved in deionized water respectively and form solution.Terra silicea purificata is added NH
4hCO
3stir into suspension liquid in solution, while stirring, add Al (NO wherein lentamente
3)
3solution, carries out precipitin reaction.The throw out of generation filtered and at 200 ~ 300 DEG C, heats 30min after abundant washing, obtaining nanometer Al
2o
3with the mixture of diatomite composition.First with alcohol, sodium polyacrylate is carried out predissolve, add water subsequently and form liquid-containing binder.In this mixture, add solvent, Graphite Powder 99, binding agent and suspension dispersive agent, nanometer anticreep carbon pastes after stirring, can be formed.
Under room temperature by obtained coating even application at 42CrMo specimen surface to be heated.Workpiece is carried out oil quenching thermal treatment, protected surperficial metal luster after insulation 60min 860 DEG C time, and metallographic examination is analyzed and is found, protected non-oxidation, decarburization phenomenon occur.After quenching, coating is peeled off naturally.
Embodiment 2
Anti-decarburization nano paint each chemical composition quality is as shown in table 2:
Table 2 embodiment 2 coating composition proportioning
Al (NO is taken according to table 2
3)
3and NH
4hCO
3be dissolved in deionized water respectively and form saturated solution.Diatomite is added NH
4hCO
3stir into suspension liquid in solution, while stirring, add Al (NO wherein lentamente
3)
3solution, carries out precipitin reaction.The throw out of generation filtered and at 200 ~ 300 DEG C, heats 30min after abundant washing, obtaining nanometer Al
2o
3with the mixture of diatomite composition.First with alcohol, sodium polyacrylate is carried out predissolve, add water subsequently and form liquid-containing binder.In this mixture, add solvent, Graphite Powder 99, binding agent and suspension dispersive agent, nanometer anticreep carbon pastes after stirring, can be formed.
Under room temperature by obtained coating even application at 30CrMoA specimen surface to be heated.Workpiece is carried out oil quenching thermal treatment, protected surperficial metal luster after insulation 60min 860 DEG C time, and metallographic examination is analyzed and is found, protected non-oxidation, decarburization phenomenon occur.After quenching, coating is peeled off naturally.
Claims (3)
1. an anti-decarburization nano paint, is characterized in that, its moiety and wt% are: nanometer Al
2o
35 ~ 20%, diatomite 50 ~ 80%, Graphite Powder 99 2 ~ 10%, binding agent 5 ~ 20%, suspension dispersive agent 1 ~ 3%, surplus is solvent and impurity;
Described binding agent is one or both in polyacrylate or polyoxyethylene glycol; Described polyacrylate to be molecular weight be 15000 ~ 30000 sodium polyacrylate and polyacrylic acid potassium; Described molecular weight polyethylene glycol is 2000 ~ 8000;
Described suspension dispersive agent is sodium bentonite and carboxymethyl cellulose;
Described solvent is water and alcohol.
2. anti-decarburization nano paint according to claim 1, is characterized in that, described nanometer Al
2o
3granularity is 20 ~ 100nm.
3. a preparation method for anti-decarburization nano paint as claimed in claim 1, it is characterized in that, concrete preparation process is:
(1) take by quality proportioning: Al (NO
3)
321 ~ 84 parts, NH
4hCO
324 ~ 93 parts, 50 ~ 80 parts, diatomite, Graphite Powder 99 2 ~ 10 parts, binding agent 5 ~ 20 parts, suspension dispersive agent 1 ~ 3 part, for subsequent use;
(2) by Al (NO
3)
3and NH
4hCO
3be dissolved in respectively in deionized water, be mixed with Al (NO
3)
3saturated solution and NH
4hCO
3saturated solution;
(3) diatomite is added NH
4hCO
3stir into suspension liquid in solution, while stirring, add Al (NO wherein lentamente
3)
3solution reacts, and generates by the Al of diatomite high dispersing (OH)
3throw out;
(4) the throw out filtration washing will generated, obtains by nanometer Al (OH)
3with the mixture of diatomite composition;
(5) this mixture is heated 30min at 200 ~ 300 DEG C, make nanometer Al (OH)
3dehydration forms nanometer Al
2o
3;
(6) the nanometer Al will obtained after reaction
2o
3add solvent, Graphite Powder 99, binding agent and suspension dispersive agent with in diatomite mixture, after stirring, form nanometer anticreep carbon pastes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410337179.XA CN105315821A (en) | 2014-07-16 | 2014-07-16 | Anti-decarbonization nano coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410337179.XA CN105315821A (en) | 2014-07-16 | 2014-07-16 | Anti-decarbonization nano coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105315821A true CN105315821A (en) | 2016-02-10 |
Family
ID=55244166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410337179.XA Pending CN105315821A (en) | 2014-07-16 | 2014-07-16 | Anti-decarbonization nano coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105315821A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500790A (en) * | 2017-08-11 | 2017-12-22 | 河南华西耐火材料有限公司 | A kind of anti-decarburizing coating of high temperature and preparation method thereof |
| CN108044673A (en) * | 2018-01-10 | 2018-05-18 | 上海应用技术大学 | A kind of multifunctional intellectual carbon nano coating masticator |
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2014
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107500790A (en) * | 2017-08-11 | 2017-12-22 | 河南华西耐火材料有限公司 | A kind of anti-decarburizing coating of high temperature and preparation method thereof |
| CN107500790B (en) * | 2017-08-11 | 2019-12-31 | 河南华西耐火材料有限公司 | High-temperature decarburization-resistant coating and preparation method thereof |
| CN108044673A (en) * | 2018-01-10 | 2018-05-18 | 上海应用技术大学 | A kind of multifunctional intellectual carbon nano coating masticator |
| CN108044673B (en) * | 2018-01-10 | 2023-11-21 | 上海应用技术大学 | Multifunctional intelligent carbon nano-coating meat mincing machine |
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Application publication date: 20160210 |