CN113774319A - Chromium-free aluminized silicon composition, slurry, preparation method and application thereof - Google Patents
Chromium-free aluminized silicon composition, slurry, preparation method and application thereof Download PDFInfo
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- CN113774319A CN113774319A CN202110920976.0A CN202110920976A CN113774319A CN 113774319 A CN113774319 A CN 113774319A CN 202110920976 A CN202110920976 A CN 202110920976A CN 113774319 A CN113774319 A CN 113774319A
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- 239000002002 slurry Substances 0.000 title claims abstract description 126
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 109
- 239000010703 silicon Substances 0.000 title claims abstract description 104
- 239000000203 mixture Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 110
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims abstract description 57
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 35
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 29
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims description 28
- 238000000576 coating method Methods 0.000 claims description 27
- 239000011248 coating agent Substances 0.000 claims description 26
- 239000002904 solvent Substances 0.000 claims description 25
- 239000002562 thickening agent Substances 0.000 claims description 22
- 238000009210 therapy by ultrasound Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- 238000005260 corrosion Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000008439 repair process Effects 0.000 claims description 3
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims description 2
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims description 2
- 235000019270 ammonium chloride Nutrition 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- 238000005269 aluminizing Methods 0.000 abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 23
- 239000003795 chemical substances by application Substances 0.000 abstract description 21
- 230000008569 process Effects 0.000 abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 abstract description 10
- 238000005475 siliconizing Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 239000000945 filler Substances 0.000 abstract description 6
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 38
- 239000010410 layer Substances 0.000 description 35
- 238000005507 spraying Methods 0.000 description 34
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 30
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 26
- 238000001035 drying Methods 0.000 description 22
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 21
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- 229910052782 aluminium Inorganic materials 0.000 description 16
- 229910052786 argon Inorganic materials 0.000 description 13
- 238000000498 ball milling Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 13
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 12
- 239000002585 base Substances 0.000 description 12
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 12
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 12
- 238000001764 infiltration Methods 0.000 description 12
- 230000008595 infiltration Effects 0.000 description 12
- 239000004576 sand Substances 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 11
- 238000007664 blowing Methods 0.000 description 10
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 238000011068 loading method Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910052759 nickel Inorganic materials 0.000 description 8
- 230000003197 catalytic effect Effects 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 229910000601 superalloy Inorganic materials 0.000 description 7
- 239000002344 surface layer Substances 0.000 description 7
- 238000002309 gasification Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000007581 slurry coating method Methods 0.000 description 6
- 239000002519 antifouling agent Substances 0.000 description 5
- 239000012300 argon atmosphere Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000011863 silicon-based powder Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 3
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002798 polar solvent Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000007613 slurry method Methods 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical group S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- 206010067484 Adverse reaction Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
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- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000008384 inner phase Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/52—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in one step
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention provides a chromium-free aluminized silicon composition, slurry, a preparation method and application thereof. The chromium-free aluminized silicon composition does not contain hexavalent chromium and is made of Al2O3The powder is used as a filler, can play a role in uniformly dispersing Al-Si alloy powder in the high-temperature aluminizing and siliconizing process, can prevent the Al-Si alloy powder from being melted and sintered together, and is beneficial to the aluminizing and siliconizing process and the aluminizing layer to be uniform. The conventional powder penetrating agent is used in an amount which is many times larger than that of slurry and cannot be uniformly coated on the surface of a base material, and because the powder penetrating agent generally adopts an embedding method, the base material with a special structure cannot adopt the embedding method and must be coated by slurry. Whereas conventional water-based slurries, due to the ease with which aluminum powder reacts with water, require immediate use after deployment, or the additional use of a passivating agent, typically containing chromium, to extend shelf life, the slurries of the present invention are long-term storable, easy to coat, and environmentally friendly.
Description
Technical Field
The invention belongs to the technical field of metal corrosion prevention, and particularly relates to a chromium-free aluminized silicon composition, slurry, a preparation method and application thereof.
Background
In modern gas turbine engines, blades, combustor casings, and the like are typically made from nickel alloys, which are the most commonly used materials for making gas turbine components. The turbine operates at high temperature characteristics and the nickel-based alloy components require long-term use in higher temperature strengths. These components are typically located in the "hot zone" of the turbine. Since these assemblies operate in harsh environments, there are special design requirements for them. High temperature components of turbine engines are subject to not only thermal cycling and mechanical loads, but also erosion by corrosive particulates such as sulfates generated from the combustion of fuel. Oxidation and corrosion of the part surfaces can result in metal loss and loss of blade thickness, and loss of surface metal can rapidly lead to increased stress on the respective component, leading to failure of the engine component. Therefore, it is necessary to coat the surfaces of these parts to protect them from degradation by oxidation. It is also desirable to improve the properties of the superalloy by using surface treatment techniques to achieve higher operating temperatures.
Diffusion aluminum coatings are a common method of protecting nickel-base alloy turbine engine hardware surfaces from oxidation and corrosion. In the related art, the solid aluminizing process and the liquid (slurry) aluminizing process are the most mature and widely applied processes for preparing the diffusion aluminum coating. In a high-temperature oxidation environment, the aluminized coating generates a layer of compact alumina film on the surface of the substrate, so that an external corrosion medium is prevented from further reacting with the substrate, and the substrate can be effectively protected from external corrosion. However, the solid aluminizing process needs to use a large amount of powder, which is easy to cause dust hazard and has bad operation conditions, and a large amount of toxic gas is also discharged after the decomposition of the activating agent in the heating process, thereby bringing serious threats to the health of operators and the surrounding environment. Meanwhile, solid aluminizing has the defects that local aluminizing cannot be carried out and the uniformity of an aluminized layer is difficult to control. In comparison, the slurry method has improved operating conditions, and can be used for depositing the slurry on the surface of a workpiece by using a brushing, dipping or spraying method, then drying and curing at low temperature, and heating and preserving heat for a certain time in vacuum or inert atmosphere, and the slurry method can realize local aluminizing. Water-based slurries, usually based on aqueous phosphoric acid, are charged with chromic anhydride (CrO)3) Or the chromate passivates the surface of the aluminum powder and inhibits the oxidation of the metal aluminum, thereby slowing down the adverse reaction between the aqueous solution and the aluminum powder. But its system stability depends on the presence of a passivating agent, while hexavalent chromium is considered a carcinogen and presents a long-lasting hazard to the environment. Without the addition of aqueous slurries of chromic anhydride or chromate, the aluminum powder and solution can sometimes take several hours (or even minutes)The inner phases react with each other and may also produce a gas, such as hydrogen. Such slurries must be formulated for immediate use, are difficult to store for long periods of time, and are of low commercial value.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems in the prior art. Therefore, the invention provides a chromium-free aluminized silicon composition, slurry, a preparation method and application thereof, wherein the chromium-free aluminized silicon composition does not contain hexavalent chromium and uses Al2O3The powder is used as a filler, can play a role in uniformly dispersing Al-Si alloy powder in the high-temperature aluminizing and siliconizing process, can prevent the Al-Si alloy powder from being melted and sintered together, and is beneficial to the aluminizing and siliconizing process and the aluminizing layer to be uniform.
The invention also provides a preparation method of the chromium-free aluminized silicon composition.
The invention also provides a chromium-free aluminized silicon slurry.
The invention also provides a preparation method of the chromium-free aluminized silicon slurry.
The invention also provides application of the chromium-free aluminized silicon composition or slurry in preparation and repair of turbine engines, blades and combustor casings.
The invention also provides an anti-corrosion coating prepared from the chromium-free aluminized silicon composition or slurry.
In a first aspect, the present invention provides a chromium-free aluminized silicon composition comprising the following components: al (Al)2O3Powder, a promoter and Al-Si alloy powder.
The chromium-free aluminized silicon composition has at least the following beneficial effects:
in the chromium-free aluminized silicon composition of the present invention, Al2O3The powder is mainly used as a filler, and can play a role in uniformly dispersing Al-Si alloy powder in the high-temperature aluminizing and siliconizing process to prevent the Al-Si alloy powder from being fused and sintered together. The uniformly dispersed Al-Si alloy powder which is not sintered together can keep high specific surface area and activity, namely the powder is in a state of melting and sintering together and the activity of the action of a penetration promoter in the high-temperature aluminum-silicon infiltration process, and is beneficial to the process of aluminum-silicon infiltration and the uniformity of an infiltration layer. At the same time, the user can select the desired position,Al2O3the powder does not react with the surface of a metal base such as a nickel base, and is easy to remove after aluminizing and siliconizing.
In the chromium-free aluminized silicon composition, the penetrating agent mainly has the functions of promoting the Al-Si alloy powder to generate active Al and Si atoms and promoting the active Al and Si atoms to diffuse into the infiltrated matrix.
The Al-Si alloy powder is used as an Al and Si source, and is difficult to uniformly disperse in proportion after being dispersed in a solvent compared with single aluminum powder and silicon powder, and the alloy powder is integrally stored in the solvent, so that the uniformity of a diffusion component can be ensured even if slurry is redispersed before use, and the performances of wear resistance, corrosion resistance and the like of a permeable layer are improved.
The filler needs to have inactive chemical property, high melting point, no action with nickel-based alloy at high temperature, and Al2O3Powders are suitable fillers.
According to some embodiments of the invention, the Al is2O3The mass ratio of the powder to the accelerant to the Al-Si alloy powder is (8-12): (1-3): (15-20).
According to some embodiments of the invention, the catalytic agent comprises at least one of lithium fluoride, ammonium chloride, aluminum fluoride and aluminum chloride.
According to some embodiments of the invention, the catalytic agent is lithium fluoride.
According to some embodiments of the present invention, the Al — Si alloy powder contains 10% to 12% by mass of silicon. The Al-Si alloy powder is mainly an aluminum infiltration source, the silicon content is high, the aluminum infiltration is reduced, the silicon content of an infiltration layer is higher or lower, the performance of a final aluminum coating is influenced, the aluminum-silicon ratio is kept at the ratio, and the silicon content of the infiltration layer is ensured to be in a proper range
According to some embodiments of the present invention, the Al — Si alloy powder contains 11% by mass of silicon.
The second aspect of the invention provides a method for preparing the chromium-free aluminized silicon composition, and Al2O3And uniformly mixing the powder, the accelerant and the Al-Si alloy powder.
The preparation method of the chromium-free aluminized silicon composition has the following beneficial effects:
the preparation method of the chromium-free aluminized silicon composition has the advantages of uncomplicated preparation process, no harsh preparation conditions, low equipment requirement and easy production and industrial popularization.
In a third aspect, the invention provides a chromium-free aluminized silicon slurry, which comprises a thickening agent, a solvent and the chromium-free aluminized silicon slurry.
The chromium-free aluminized silicon slurry has the following beneficial effects:
the chromium-free aluminized silicon slurry of the invention is Al2O3The powder is mainly used as a filler, and can play a role in uniformly dispersing Al-Si alloy powder in the high-temperature aluminizing and siliconizing process to prevent the Al-Si alloy powder from being fused and sintered together. The uniformly dispersed Al-Si alloy powder which is not sintered together can keep high specific surface area and activity, and is beneficial to the process of infiltrating aluminum silicon and the uniformity of an infiltrated layer. At the same time, Al2O3The powder does not react with the surface of a metal base such as a nickel base, and is easy to remove after aluminizing and siliconizing.
The conventional powder penetrating agent is used in an amount which is many times larger than that of slurry and cannot be uniformly coated on the surface of a base material, and because the powder penetrating agent generally adopts an embedding method, the base material with a special structure cannot adopt the embedding method and must be coated by slurry. Whereas conventional water-based slurries, due to the ease with which aluminum powder reacts with water, require immediate use after deployment, or the additional use of a passivating agent (typically containing chromium) to extend shelf life, the slurries of the present invention are long-term storable, easy to coat, and environmentally friendly.
The chromium-free aluminized silicon slurry has the effect of the penetrating agent, and mainly promotes the Al-Si alloy powder to generate active Al and Si atoms and promotes the active Al and Si atoms to diffuse into the infiltrated matrix.
In the chromium-free aluminized silicon slurry, the Al-Si alloy powder is used as an Al source and an Si source, and is difficult to uniformly disperse in proportion compared with the single aluminum powder and silicon powder dispersed in a solvent, and the alloy powder integrally exists in the solvent, so that the uniformity of a diffusion component can be ensured even if the slurry is redispersed before use, and the performances of wear resistance, corrosion resistance and the like of an infiltrated layer are improved.
In the chromium-free aluminized silicon slurry, the thickening agent can ensure that the slurry is viscous when in use, is convenient to paint, and can be better and more uniformly coated on the part of a workpiece needing aluminizing.
In the chromium-free aluminized silicon slurry, the thickening agent can be decomposed at 600 ℃, no residue is left, and no by-product harmful to the nickel-based high-temperature alloy is generated.
In the chromium-free aluminized silicon slurry, the solvent is an aprotic polar solvent, has good dissolving and dispersing capacities on various organic compounds and inorganic compounds, and has lower surface tension and better wettability compared with a water-based system. Whereas aqueous systems generally present dissociated H+、OH-Ions, which all react with the aluminum source aluminum powder, rendering the impregnation agent ineffective to add chromic anhydride (CrO)3) Or chromate passivates the aluminum powder surface. Using aprotic polar solvents, in the absence of dissociated H+、OH-The ion and Al-Si alloy powder can be stored in the solvent for a long time, so the chromium-free aluminized silicon slurry can be stored for a long time and has good stability.
The chromium-free aluminized silicon slurry has the advantages that the solvent is an organic system, the surface tension is lower, the wettability is better, the chromium-free aluminized silicon slurry can be uniformly coated on the surface of nickel-based metal, the aluminizing uniformity and the aluminizing uniformity are improved, and the like.
The chromium-free aluminized silicon slurry is suitable for aluminizing silicon of parts with complex structural shapes.
The chromium-free aluminized silicon slurry does not contain hexavalent chromium ions, and is environment-friendly.
Compared with the composition, the chromium-free aluminized silicon slurry has the following beneficial effects:
on the other hand, in the case of a powder composition, the powder composition is mixed with a solvent before use, and if the amount is different for each use, the ratio needs to be recalculated.
On the other hand, the hydroxypropyl cellulose thickener is used in the formula of the chromium-free aluminized silicon slurry, so that the viscosity of the slurry is moderate and the slurry is suitable for spraying.
From a commercialization point of view, the powder composition is too complicated to be used and is generally not acceptable to customers. When the slurry is prepared, the mixed powder can be uniformly dispersed in the solvent, can be stored for a long time, and can be shaken up before use.
According to some embodiments of the present invention, the thickener is required to be such that it does not remain after gasification at high temperatures.
According to some embodiments of the invention, the thickening agent is hydroxypropyl cellulose, so that the slurry is viscous when in use, is convenient to coat, can be better and more uniformly coated on a part of a workpiece needing aluminizing, can be decomposed at 600 ℃, does not remain, and does not generate a byproduct harmful to the nickel-based high-temperature alloy.
According to some embodiments of the invention, the chrome-free aluminized silicon slurry comprises the following components in percentage by mass:
Al2O3powder: 8.0 to 12.0 percent of the total weight of the mixture,
and (3) an energizer: 1.0 to 5.0 percent of the total weight of the mixture,
Al-Si alloy powder: 15.0 percent to 20.0 percent,
thickening agent: 1.0 to 2.0 percent of the total weight of the mixture,
solvent: 63.0 to 75.0 percent.
According to some embodiments of the invention, the chrome-free aluminized silicon slurry comprises the following components in percentage by mass:
Al2O3powder: 10 percent of the total weight of the mixture,
and (3) an energizer: 2.5 percent of the total weight of the mixture,
Al-Si alloy powder: 18 percent of the total weight of the mixture,
thickening agent: 1.5 percent of the total weight of the mixture,
solvent: 68 percent.
The fourth aspect of the invention provides a preparation method of chromium-free aluminized silicon slurry, which comprises the following steps:
under the stirring and ultrasonic conditions, the Al is mixed2O3Adding the powder, the accelerant and the Al-Si alloy powder into the solvent, uniformly mixing, and adding the thickening agent.
According to some embodiments of the invention, the ultrasound has a frequency of 40Hz to 60 Hz.
According to some embodiments of the present invention, a method for preparing a chromium-free aluminized silicon slurry includes the steps of:
adding N, N-dimethylformamide into an ultrasonic reaction kettle, controlling the stirring speed to be 300 rm-500 rpm and the ultrasonic frequency to be 40 Hz-60 Hz, and adding Al2O3Performing ultrasonic treatment on the powder, LiF and Al-Si alloy powder for 20-30 min;
and continuously adding hydroxypropyl cellulose, and carrying out ultrasonic treatment for 30-50 min to obtain the finished product of the chromium-free aluminized silicon slurry.
The preparation method of the chromium-free aluminized silicon slurry has the following beneficial effects:
the preparation method of the chromium-free aluminized silicon slurry has the advantages of low production cost and simple process, and is suitable for large-scale production.
According to some embodiments of the present invention, a method for using a chromium-free aluminized silicon slurry may include the steps of:
slurry ball milling: ball-milling the slurry for 2-4 h to obtain ball-milled slurry;
protecting a non-seepage surface: coating protective paint on the surface layer which does not need aluminizing for protection;
slurry coating: uniformly spraying the slurry on the test piece by using a spray gun;
drying treatment: after spraying, drying the slurry layer at 160-180 ℃ for 1-2 h, evaporating the organic solvent until the coating becomes white, and obtaining a workpiece with an aluminum-silicon coating;
and (3) gasification treatment: heating the workpiece with the aluminum-silicon coating in an argon atmosphere for 1 to 10 hours at the temperature of 700 to 800 ℃ to decompose the organic thickening agent and leave net-shaped gaps;
preparing an aluminum-silicon infiltrated layer: the preparation of the aluminum-silicon infiltration layer is carried out in a vacuum or argon protection environment, the furnace temperature is controlled to be 1020-1030 ℃, and the heat preservation is carried out for 4-5 h;
in the slurry coating process, the surface of the test piece adopts a multi-time spraying mode, the spraying requires that the slurry is uniformly adhered and does not flow, the spraying times are 3-4 times, the next spraying is carried out after each spraying and drying, and the weight of each sprayingIs 10mg/cm2～20mg/cm2(weight after drying).
In addition, before the non-infiltration surface protection is carried out on the test piece and after the aluminum-silicon infiltration layer is prepared, the surface of the test piece needs to be cleaned by sand blowing to remove attachments on the surface of the test piece.
The fifth aspect of the invention provides the application of the chromium-free aluminized silicon composition or the chromium-free aluminized silicon slurry in preparation and repair of turbine engines, blades and combustor casings.
In modern gas turbine engines, blades, combustor casings, and the like are typically made from nickel alloys, which are the most commonly used materials for making gas turbine components. In addition, there is a cobalt-based matrix. In view of the lighter weight of the engine blade, the combination of easy processing property, oxidation and corrosion resistance and the like, the molybdenum-based alloy is less used as the engine blade.
A sixth aspect of the present invention provides an anti-corrosive coating prepared from the above chromium-free aluminized silicon composition or chromium-free aluminized silicon slurry.
Detailed Description
The following are specific examples of the present invention, and the technical solutions of the present invention will be further described with reference to the examples, but the present invention is not limited to the examples.
In the following examples and comparative examples:
Al2O3the powders were purchased from: zhengzhou Xinli abrasion resistant materials, Inc.
The energizer was purchased from: xiong chemical Co., Ltd.
The Al-Si alloy powder was purchased from: metal powder limited of the national mingxi ji xin of Hunan.
Example 1
This example specifically prepares a chrome-free aluminized silicon composition, which specifically includes:
Al2O3powder, catalyst and Al-Si alloy powder, Al2O3The mass ratio of the powder, the accelerant and the Al-Si alloy powder is 8: 1: 15.
the accelerant agent is lithium fluoride.
Al2O3The particle size of the powder was-800 mesh.
The mass content of silicon in the Al-Si alloy powder is 11 percent, and the grain diameter is-325 meshes.
The preparation method comprises the following steps:
mixing Al2O3And uniformly mixing the powder, the accelerant and the Al-Si alloy powder through ball milling.
Example 2
This example specifically prepares a chrome-free aluminized silicon composition, which specifically includes:
Al2O3powder, catalyst and Al-Si alloy powder, Al2O3The mass ratio of the powder, the accelerant and the Al-Si alloy powder is 10: 1: 15.
the accelerant agent is ammonium fluoride.
Al2O3The particle size of the powder was-800 mesh.
The mass content of silicon in the Al-Si alloy powder is 11 percent, and the grain diameter is-325 meshes.
The preparation method comprises the following steps:
mixing Al2O3And uniformly mixing the powder, the accelerant and the Al-Si alloy powder through ball milling.
Example 3
This example specifically prepares a chrome-free aluminized silicon composition, which specifically includes:
Al2O3powder, catalyst and Al-Si alloy powder, Al2O3The mass ratio of the powder, the accelerant and the Al-Si alloy powder is 12: 1: 20.
the accelerant agent is aluminum chloride.
Al2O3The particle size of the powder was-800 mesh.
The mass content of silicon in the Al-Si alloy powder is 11 percent, and the grain diameter is-325 meshes.
The preparation method comprises the following steps:
mixing Al2O3And uniformly mixing the powder, the accelerant and the Al-Si alloy powder through ball milling.
Example 4
This embodiment specifically prepares a chromium-free aluminized silicon slurry, which specifically includes:
Al2O3powder: 10 percent of the total weight of the mixture,
and (3) catalytic agent LiF: 4 percent of the total weight of the mixture,
Al-Si alloy powder: 18 percent of the total weight of the mixture,
thickener hydroxypropyl cellulose: 1.5 percent of the total weight of the mixture,
solvent N, N-dimethylformamide: 66.5 percent.
In the Al-Si alloy powder, the mass percentage of silicon is 11%.
The preparation method comprises the following steps:
adding N, N-dimethylformamide into an ultrasonic reaction kettle, controlling the stirring speed to be 400rpm and the ultrasonic frequency to be 50Hz, and adding Al2O3Performing ultrasonic treatment on the powder, LiF and Al-Si alloy powder for 20 min;
and continuously adding hydroxypropyl cellulose, and performing ultrasonic treatment for 40min to obtain the finished product of the chromium-free aluminized silicon slurry.
After the chromium-free aluminized silicon slurry is prepared, the slurry is sealed and stored for 1 day.
Example 5
This embodiment specifically prepares a chromium-free aluminized silicon slurry, which specifically includes:
Al2O3powder: 10 percent of the total weight of the mixture,
and (3) catalytic agent LiF: 4 percent of the total weight of the mixture,
Al-Si alloy powder: 18 percent of the total weight of the mixture,
thickener hydroxypropyl cellulose: 1.5 percent of the total weight of the mixture,
solvent N, N-dimethylformamide: 66.5 percent.
In the Al-Si alloy powder, the mass percentage of silicon is 11%.
The preparation method comprises the following steps:
adding N, N-dimethylformamide into an ultrasonic reaction kettle, controlling the stirring speed to be 400rpm and the ultrasonic frequency to be 50Hz, and adding Al2O3Performing ultrasonic treatment on the powder, LiF and Al-Si alloy powder for 20 min;
and continuously adding hydroxypropyl cellulose, and performing ultrasonic treatment for 40min to obtain the finished product of the chromium-free aluminized silicon slurry.
After the chromium-free aluminized silicon slurry is prepared, the slurry is sealed and stored for 30 days.
Example 6
This embodiment specifically prepares a chromium-free aluminized silicon slurry, which specifically includes:
Al2O3powder: 10 percent of the total weight of the mixture,
and (3) catalytic agent LiF: 4 percent of the total weight of the mixture,
Al-Si alloy powder: 18 percent of the total weight of the mixture,
thickener hydroxypropyl cellulose: 1.5 percent of the total weight of the mixture,
solvent N, N-dimethylformamide: 66.5 percent.
In the Al-Si alloy powder, the mass percentage of silicon is 11%.
The preparation method comprises the following steps:
adding N, N-dimethylformamide into an ultrasonic reaction kettle, controlling the stirring speed to be 400rpm and the ultrasonic frequency to be 50Hz, and adding Al2O3Performing ultrasonic treatment on the powder, LiF and Al-Si alloy powder for 20 min;
and continuously adding hydroxypropyl cellulose, and performing ultrasonic treatment for 40min to obtain the finished product of the chromium-free aluminized silicon slurry.
After the chromium-free aluminized silicon slurry is prepared, the slurry is sealed and stored for 60 days.
Example 7
This embodiment specifically prepares a chromium-free aluminized silicon slurry, which specifically includes:
Al2O3powder: 10 percent of the total weight of the mixture,
and (3) catalytic agent LiF: 4 percent of the total weight of the mixture,
Al-Si alloy powder: 18 percent of the total weight of the mixture,
thickener hydroxypropyl cellulose: 1.5 percent of the total weight of the mixture,
solvent N, N-dimethylformamide: 66.5 percent.
In the Al-Si alloy powder, the mass percentage of silicon is 11%.
The preparation method comprises the following steps:
adding N, N-dimethylformamide into an ultrasonic reaction kettle, controlling the stirring speed to be 400rpm and the ultrasonic frequency to be 50Hz, and adding Al2O3Performing ultrasonic treatment on the powder, LiF and Al-Si alloy powder for 20 min;
and continuously adding hydroxypropyl cellulose, and performing ultrasonic treatment for 40min to obtain the finished product of the chromium-free aluminized silicon slurry.
After the chromium-free aluminized silicon slurry is prepared, the slurry is sealed and stored for 120 days.
Example 8
This example produced a DZ22B nickel-base superalloy blade aluminized silicon layer using the chromium-free aluminized silicon slurry of example 4.
The preparation method specifically comprises the following steps:
1. slurry ball milling: ball-milling the slurry which is hermetically stored for 1 day for 4 hours to obtain ball-milled slurry;
2. protecting a non-seepage surface: coating protective paint on the surface layer of the blade which does not need aluminizing for protection;
3. slurry coating: the slurry is uniformly sprayed on the test piece by a spray gun. The spraying requires that the slurry is attached uniformly and does not flow, the spraying frequency is 3 times, the next spraying is carried out after each spraying and drying, and the weight of each spraying is 15mg/cm2(weight after drying);
4. drying treatment: after spraying, drying the slurry layer at 180 ℃ for 2h, evaporating the organic solvent until the coating becomes white, and obtaining a workpiece with an aluminum-silicon coating;
5. and (3) gasification treatment: heating the workpiece with the aluminum-silicon coating in an argon atmosphere for 5 hours at 800 ℃ to decompose the organic thickening agent and leave net-shaped gaps;
6. preparing an aluminum-silicon infiltrated layer: loading the test piece into a muffle tank, and loading the muffle tank into an argon furnace with the argon flow of 1m3Heating the vacuum furnace to 1030 ℃ and preserving the heat for 4 hours; cooling, and stopping introducing argon when the temperature is cooled to be less than or equal to 100 ℃;
7. blowing sand: and after the temperature in the furnace is cooled to the room temperature, taking out the test piece, blowing sand to clean the surface of the test piece, and removing the surface attachments.
Example 9
This example produced a DZ22B nickel-base superalloy blade aluminized silicon layer using the chromium-free aluminized silicon slurry of example 5.
The preparation method specifically comprises the following steps:
1. slurry ball milling: ball-milling the slurry which is hermetically stored for 30 days for 4 hours to obtain ball-milled slurry;
2. protecting a non-seepage surface: coating protective paint on the surface layer of the blade which does not need aluminizing for protection;
3. slurry coating: the slurry is uniformly sprayed on the test piece by a spray gun. The spraying requires that the slurry is attached uniformly and does not flow, the spraying frequency is 3 times, the next spraying is carried out after each spraying and drying, and the weight of each spraying is 15mg/cm2(weight after drying);
4. drying treatment: after spraying, drying the slurry layer at 180 ℃ for 2h, evaporating the organic solvent until the coating becomes white, and obtaining a workpiece with an aluminum-silicon coating;
5. and (3) gasification treatment: heating the workpiece with the aluminum-silicon coating in an argon atmosphere for 5 hours at 800 ℃ to decompose the organic thickening agent and leave net-shaped gaps;
6. preparing an aluminum-silicon infiltrated layer: loading the test piece into a muffle tank, and loading the muffle tank into an argon furnace with the argon flow of 1m3Heating the vacuum furnace to 1030 ℃ and preserving the heat for 4 hours; cooling, and stopping introducing argon when the temperature is cooled to be less than or equal to 100 ℃;
7. blowing sand: and after the temperature in the furnace is cooled to the room temperature, taking out the test piece, blowing sand to clean the surface of the test piece, and removing the surface attachments.
Example 10
This example produced a DZ22B nickel-base superalloy blade aluminized silicon layer using the chromium-free aluminized silicon slurry of example 6.
The preparation method specifically comprises the following steps:
1. slurry ball milling: ball-milling the slurry which is hermetically stored for 60 days for 4 hours to obtain ball-milled slurry;
2. protecting a non-seepage surface: coating protective paint on the surface layer of the blade which does not need aluminizing for protection;
3. slurry coating: the slurry is uniformly sprayed on the test piece by a spray gun. The spraying requires that the slurry is attached uniformly and does not flow, the spraying frequency is 3 times, the next spraying is carried out after each spraying and drying, and the weight of each spraying is 15mg/cm2(weight after drying);
4. drying treatment: after spraying, drying the slurry layer at 180 ℃ for 2h, evaporating the organic solvent until the coating becomes white, and obtaining a workpiece with an aluminum-silicon coating;
5. and (3) gasification treatment: heating the workpiece with the aluminum-silicon coating in an argon atmosphere for 5 hours at 800 ℃ to decompose the organic thickening agent and leave net-shaped gaps;
6. preparing an aluminum-silicon infiltrated layer: loading the test piece into a muffle tank, and loading the muffle tank into an argon furnace with the argon flow of 1m3Heating the vacuum furnace to 1030 ℃ and preserving the heat for 4 hours; cooling, and stopping introducing argon when the temperature is cooled to be less than or equal to 100 ℃;
7. blowing sand: and after the temperature in the furnace is cooled to the room temperature, taking out the test piece, blowing sand to clean the surface of the test piece, and removing the surface attachments.
Example 11
This example produced a DZ22B nickel-base superalloy blade aluminized silicon layer using the chromium-free aluminized silicon slurry of example 7.
The preparation method specifically comprises the following steps:
1. slurry ball milling: ball-milling the slurry which is hermetically stored for 120 days for 4 hours to obtain ball-milled slurry;
2. protecting a non-seepage surface: coating protective paint on the surface layer of the blade which does not need aluminizing for protection;
3. slurry coating: the slurry is uniformly sprayed on the test piece by a spray gun. The spraying requires that the slurry is attached uniformly and does not flow, the spraying frequency is 3 times, the next spraying is carried out after each spraying and drying, and the weight of each spraying is 15mg/cm2(weight after drying);
4. drying treatment: after spraying, drying the slurry layer at 180 ℃ for 2h, evaporating the organic solvent until the coating becomes white, and obtaining a workpiece with an aluminum-silicon coating;
5. and (3) gasification treatment: heating the workpiece with the aluminum-silicon coating in an argon atmosphere for 5 hours at 800 ℃ to decompose the organic thickening agent and leave net-shaped gaps;
6. preparing an aluminum-silicon infiltrated layer: loading the test piece into a muffle tank, and loading the muffle tank into an argon furnace with the argon flow of 1m3Heating the vacuum furnace to 1030 ℃ and preserving the heat for 4 hours; cooling, and stopping introducing argon when the temperature is cooled to be less than or equal to 100 ℃;
7. blowing sand: and after the temperature in the furnace is cooled to the room temperature, taking out the test piece, blowing sand to clean the surface of the test piece, and removing the surface attachments.
Comparative example 1
This comparative example differs from example 8 in that the solvent in the slurry is deionized water.
Comparative example 2
This comparative example differs from example 9 in that the solvent in the slurry is deionized water.
Comparative example 3
This comparative example differs from example 10 in that the solvent in the slurry is deionized water.
Comparative example 4
This comparative example differs from example 11 in that the solvent in the slurry is deionized water.
Comparative example 5
This comparative example differs from example 8 in that instead of using Al — Si alloy powder, aluminum powder and silicon powder are used in the slurry. The slurry comprises the following specific components:
Al2O3powder: 10 percent of the total weight of the mixture,
and (3) catalytic agent LiF: 4 percent of the total weight of the mixture,
aluminum powder: 16 percent of the total weight of the mixture,
silicon powder: 2 percent of the total weight of the mixture,
thickener hydroxypropyl cellulose: 1.5 percent of the total weight of the mixture,
solvent N, N-dimethylformamide: 66.5 percent.
Example of detection
The depth and surface al content of the aluminized silicon layer in the DZ22B nickel-base superalloy blades prepared in examples 8 to 11, and comparative examples 1 to 3 were tested. Wherein, the depth measurement of the aluminized silicon layer adopts a metallographic method, and the aluminum content of the surface layer is obtained by energy spectrum test. The results are shown in Table 1.
TABLE 1
According to the test results in table 1, the combination of the depth of the penetrated layer and the range of the aluminum and silicon contents on the surface of the penetrated layer can be achieved, which shows that the aluminized silicon is normal, and the chromium-free aluminized silicon slurry of the invention is beneficial to the aluminizing process. At 120 days, the aluminum content of the surface layer of the aluminized layer can reach 27.33%, the silicon content can reach 2.89%, and the aluminized silicon content is very stable, which shows that the aluminized silicon slurry provided by the embodiment of the invention can be stored for a long time and has good stability. Compared with the aluminum powder and the silicon powder which are used independently, the Al-Si alloy powder has higher silicon content in the infiltration layer, and silicon in the embodiment 1 can enter the infiltration layer more easily.
Detection example 2
The slurry wettability was tested in this example.
The slurries provided in examples 8 to 11 and comparative examples 1 and 2 were tested for wettability and the results are shown in table 2.
The experimental method specifically comprises the following steps:
(1) A40X 2mm test piece of a nickel-based superalloy blade (DZ22B) with a flat surface is made of Al2O3And sand is blown to the surface of the test piece by sand grains, and the sand blowing is uniform on all the surfaces.
(2) And (3) carrying out ultrasonic cleaning on the test piece subjected to surface sand blasting by adopting an acetone solution to remove surface oil stains, wherein the cleaning time is 20 min.
(3) Then NaOH solution with the concentration of 20% is used for degreasing and cleaning the test piece for 10 min; and (3) carrying out surface activation treatment on the test piece by using HCl with the concentration of 10% for 10s, finally rinsing the test piece for three times by using deionized water, and finally drying the test piece in a vacuum drying oven.
(4) And (3) uniformly spraying the slurry on one surface of the test piece at room temperature, horizontally standing for 1h, and observing the percentage of the coverage area of the surface of the test piece by the slurry.
Evaluation basis: the larger the proportion of the covered area of the test piece by the slurry after standing for 1h is, the better the wetting effect of the slurry on the test piece is.
TABLE 2 test results of slurry to test piece wettability test
The experimental result shows that compared with a water-based system, the slurry provided by the application has good wettability, the surface of the test piece cannot be completely covered after the water-based system is statically placed, and in the process of preparing the infiltrated layer, the surface of the uncovered part has no aluminum source, so that the infiltrated layer cannot be aluminized, and the infiltrated layer uniformity is seriously influenced.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments described above, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The chrome-free aluminized silicon composition is characterized by comprising the following components: al (Al)2O3Powder, a promoter and Al-Si alloy powder.
2. The chromium-free aluminized silicon composition of claim 1, wherein the Al is2O3The mass ratio of the powder to the accelerant to the Al-Si alloy powder is (8-12): (1-3): (15-20).
3. The chromium-free aluminized silicon composition of claim 1 or 2, wherein the infiltrant includes at least one of lithium fluoride, ammonium chloride, aluminum fluoride, and aluminum chloride.
4. Method for producing a chromium-free aluminized silicon composition according to one of claims 1 to 3, characterized in that the Al is applied2O3And uniformly mixing the powder, the accelerant and the Al-Si alloy powder.
5. Chromium-free aluminized silica slurry according to any one of claims 1 to 3, characterized by comprising a thickener, a solvent, and the chromium-free aluminized silica slurry according to any one of claims 1 to 3.
6. The chromium-free aluminized silicon slurry according to claim 5, characterized by comprising the following components in percentage by mass:
Al2O3powder: 8.0 to 12.0 percent of the total weight of the mixture,
and (3) an energizer: 1.0 to 5.0 percent of the total weight of the mixture,
Al-Si alloy powder: 15.0 percent to 20.0 percent,
thickening agent: 1.0 to 2.0 percent of the total weight of the mixture,
solvent: 63.0 to 75.0 percent.
7. The method for preparing chromium-free aluminized silicon slurry according to claim 6, comprising the steps of:
under the stirring and ultrasonic conditions, the Al is mixed2O3Adding the powder, the accelerant and the Al-Si alloy powder into the solvent, uniformly mixing, and adding the thickening agent.
8. The method for preparing chromium-free aluminized silicon slurry according to claim 7, wherein the frequency of the ultrasonic treatment is 40Hz to 60 Hz.
9. Use of the chromium-free aluminized silicon composition according to any one of claims 1 to 3 or of the chromium-free aluminized silicon slurry according to claim 5 for the production and repair of turbine engines, blades, and combustor casings.
10. An anti-corrosion coating formed from a chromium-free aluminized silicon composition according to any one of claims 1 to 3 or a chromium-free aluminized silicon slurry according to claim 5.
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