WO2003033436A2 - Precurseur de revetement et procede pour revetir un substrat d'une couche refractaire - Google Patents
Precurseur de revetement et procede pour revetir un substrat d'une couche refractaire Download PDFInfo
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- WO2003033436A2 WO2003033436A2 PCT/FR2002/003517 FR0203517W WO03033436A2 WO 2003033436 A2 WO2003033436 A2 WO 2003033436A2 FR 0203517 W FR0203517 W FR 0203517W WO 03033436 A2 WO03033436 A2 WO 03033436A2
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- refractory
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62222—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic coatings
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5037—Clay, Kaolin
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
- C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
- C23C18/1208—Oxides, e.g. ceramics
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
- C23C18/1225—Deposition of multilayers of inorganic material
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
- C23C18/125—Process of deposition of the inorganic material
- C23C18/1275—Process of deposition of the inorganic material performed under inert atmosphere
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- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
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- 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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
- C04B2111/00879—Non-ferrous metallurgy
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
Definitions
- the present invention relates to the protection of objects and materials intended for the metallurgical industry, in particular in the aluminum industry. It relates in particular to the protective coatings of said objects and materials.
- Containers such as pockets or ovens
- conduits such as chutes, injectors and spouts
- tools and devices that are intended to handle and process liquid aluminum (such as filters and rotors) must have high mechanical and chemical resistance.
- the surfaces of these objects which are exposed to liquid aluminum must neither dissolve in nor contaminate the liquid aluminum.
- the subject of the invention is a coating precursor intended for the formation of a protective layer on a substrate.
- Said precursor comprises a silicone resin (or organosiloxane) and a mineral filler capable of reacting chemically with said resin so as to produce a cohesive refractory layer after a calcining operation of the layer.
- Said precursor which is typically in the form of a powder, is preferably homogeneous.
- the silicone resin is a polysiloxane preferably comprising a proportion of OH groups, such as a polymethylsiloxane. a polydimethylsiloxane, a polymethylsilsesquioxane, or a mixture thereof, comprising a proportion of OH groups substituted for the methyl groups.
- the Applicant has noted that the proportion of OH groups is preferably between approximately 0.5% and approximately 2%. Too low a proportion of OH groups does not confer a sufficient propensity to form a solid layer with high cohesiveness after calcination. A very high proportion of OH groups can make the polysiloxane difficult to produce at an acceptable cost.
- the silanol groups are preferably stable in order to allow storage of the resin. These OH groups can be grafted to a polysiloxane by hydrolysis.
- the siloxane units of the polysiloxane according to the invention are advantageously, in whole or in part, tri- or quadri-functional.
- the mineral filler is typically chosen from borides, carbides, nitrides and metal oxides or from borides, carbides and nitrides of non-metals (such as boron nitrides), or a combination or mixture of them.
- Said mineral filler is advantageously chosen from metal compounds such as metal oxides, metal carbides, metal borides and metal nitrides, or a combination or a mixture of these.
- the mineral filler is preferably capable of reacting chemically with the silicone resin so as to produce a refractory layer with high cohesiveness after calcination of said layer flood.
- the mineral filler can be chosen according to the physicochemical characteristics expected from the coating (such as its wettability or non-wettability by a liquid metal).
- the metal compound is advantageously alumina, ZrO 2 , ZrB 2 , TiB 2 or TiO 2 or a combination or a mixture of these.
- the alumina is preferably a reactive calcined alpha alumina, called technical alumina, the hydration rate of which is very low (typically less than 1%, or even less than 0.5%).
- the mineral filler is preferably in the form of a powder.
- the particle size of the mineral filler powder is typically such that the grain size is between 1.5 ⁇ m and 100 ⁇ m.
- the physical properties of the coating can, in certain cases, be adapted by adjusting the proportion of mineral filler and / or its particle size.
- the proportion of silicone resin in the precursor is typically between 10 and 20% by weight, in order to allow satisfactory ceramization of the coating during calcination.
- the proportion of mineral filler in the precursor is typically between 80 and 90% by weight.
- the precursor further comprises an additive capable of reducing the viscosity of the precursor.
- Said additive is typically a dispersant, such as stearic acid.
- the proportion of said additive in the precursor is typically less than 2% by weight, and more typically between 0.1 and 1%.
- the precursor is typically obtained by mixing the resin, the mineral filler and the additive and, if necessary, by grinding the mixture.
- the subject of the invention is also a method for coating a determined surface of a substrate with at least one refractory layer containing silicon in which:
- the substrate is coated with a coating precursor according to the invention, so as to form a green layer;
- calcination capable of causing the elimination of volatile matter, the calcination of said raw layer and the formation of a cohesive refractory layer.
- the Applicant has observed that the process of the invention makes it possible to obtain a thin, resistant layer which is strongly adherent to the substrate which is resistant to liquid metal and which has a high cohesiveness.
- the coating of the substrate (which typically comprises depositing and spreading said precursor on the substrate) can be carried out by any known means, and preferably by electrostatic powdering.
- the substrate can optionally be brought to a temperature above ambient before coating in order to promote the formation of a homogeneous deposit and the adhesion of the deposit by melting the resin.
- the method according to the invention can also include complementary operations, such as preparing the parts of the surface of the substrate that it is desired to coat and / or drying the raw coating before the heat treatment.
- the preparation of the surface of the substrate typically includes cleaning and / or degreasing (for example using acetone).
- the so-called calcination heat treatment comprises at least one step at an elevated temperature, which is typically between 650 and 1300 ° C, and more typically between 800 and 1300 ° C, capable of transforming the raw layer into a refractory ceramic, which is advantageously in the glassy state.
- the composition of the glassy phase typically comprises between 5 and 25% by weight of silica obtained from the resin (the remainder, typically 75. to 95% by weight, essentially consists of the mineral filler).
- the calcination temperature also depends on the substrate; for example, in the case of a metal substrate, it is advantageously lower than the softening temperature thereof. On the other hand, it is also preferable to use a calcination temperature higher than the temperature of use of the coated substrate.
- the heat treatment may include an intermediate step at a temperature between 200 and 600 ° C (typically between 200 and 250 ° C).
- This intermediate step is preferably capable of causing the crosslinking of the resin and, optionally, the decomposition of the latter before the "ceramization" (or final calcination) of the coating.
- the duration of the heat treatment is preferably such that it allows complete ceramization of the precursor.
- the rise in temperature is advantageously slow enough to avoid cracking of the coating.
- the organic compounds are removed (by evaporation and / or by decomposition), leaving a refractory solid on a surface of the substrate.
- This solid is for example formed from the metal coming from the metal compound and from the silicon coming from the silicone resin.
- the Si-OH silanol groups of the polysiloxane seem to establish covalent bonds with the OH groups of the alumina, which bonds seem to transform into Si-O-Al bonds, with evolution of water, during heat treatment, to form an alumino-silicate, which is advantageously in the vitreous state.
- a similar mechanism could occur with metal compounds other than alumina.
- the ambient atmosphere during calcination treatment is advantageously non-oxidizing, in order to avoid in particular an oxidation of the substrate at the substrate / coating interface liable to cause decohesion between the substrate and the coating, or even the destruction of the substrate (by example when it is in graphite).
- the final coating can comprise two or more successive layers, which can be applied by successive coatings and heat treatments, ie by successive coating / heat treatment sequences. In other words, the coating and calcination treatment operations of the layer are repeated for each elementary layer of the final coating.
- the successive layers may have a different composition, so as to give them different chemical and mechanical properties. This last variant makes it possible to adapt each layer to a local function, such as the adhesion to the substrate for the first layer, the mechanical resistance for the intermediate layers and the chemical resistance for the surface layer.
- the subject of the invention is also a substrate, at least part of the surface of which comprises at least one refractory layer obtained by using said precursor or by using said coating process, which refractory layer is advantageously in the vitreous state, with or without composition gradient in the direction perpendicular to the surface of the substrate.
- the invention also relates to the use of said precursor or of said coating process for the protection of a substrate, in particular for the protection of a material and / or of a piece of equipment intended to be exposed to an environment.
- oxidizing agent to liquid metal (in particular aluminum, an aluminum alloy, magnesium or a magnesium alloy, in the liquid state) and / or to a solid or molten salt.
- the substrate can be made of metal (such as an iron-nickel-chromium base alloy (typically a steel or an inconel)), of refractory material or of carbonaceous material (such as graphite ), or a mixture or combination thereof; it can be a particular object (typically a piece of equipment, such as a metal or refractory component of a casting loom, a nozzle, a distributor of liquid metal in a swamp, a steel screen (in particular stainless steel ) or in refractory or ceramic material, a metallic or refractory filter, an injector of liquid metal or gas bubbles, a rotor, doctor blade, pouring spout, ultrasonic sensor, measurement sensor (ultrasound, temperature, ...) intended to be immersed in a liquid metal, parts made of carbonaceous materials, graphite bricks, etc.), or a material, in particular a covering material (such as a brick of refractory material or carbonaceous material (
- powders of calcined alpha alumina (alumina of references P152SB and AC44 from the company Aluminum Pechiney) having respectively a D50 of 1.5 and 50 ⁇ m and a BET specific surface of 3 and 1 m 2 / g;
- Silicone resin a polymethylsiloxane MK from the company Wacker, which is a tri-functional resin with approximately 1% of OH groups. This resin was composed of approximately 80% of silica equivalent and 20% of methyl groups, which decompose at a temperature of the order of 450 ° C;
- Powder compositions were tested. They had the following composition (% by weight): 85.25% of mineral filler (alumina or TiB 2 ), 14.49% of silicone resin and 0.26% of stearic acid as an additive capable of lowering the viscosity of the mixture. The proportions were such that the refractory coating obtained comprised approximately 88% by weight of equivalent of the metal compound (or of the mixture of metal compounds) and 12% by weight of equivalent silica.
- the powders were prepared with plastics equipment, including a mixer. In this mixer, preheated to 100 ° C in order to work beyond the melting point of the resin and below the crosslinking temperature of the resin, a composition based on 100g of filler. At this temperature, the resin melted and mixed intimately with the filler. After cooling, a hard block was obtained. This block was ground, first with a jaw crusher to a particle size of 1 mm, then with a ball mill until a particle size less than 150 ⁇ m was obtained.
- the powders obtained were deposited by electrostatic powdering on various substrates, such as nozzles and screens made of 304 L stainless steel.
- the coated substrates were crosslinked at a temperature of 240 ° C for one hour.
- the final thickness of the coating was typically of the order of 50 ⁇ m for one layer. This coating was very uniform and solid (highly cohesive and non-powdery) and, in the case of grids, did not block the openings thereof.
- Substrates thus coated were directly dipped in liquid aluminum at a temperature of about 710 ° C. Ceramization was carried out in situ.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02790511A EP1436240A2 (fr) | 2001-10-15 | 2002-10-14 | Precurseur de revetement et procede pour revetir un substrat d'une couche refractaire |
CA002463568A CA2463568A1 (fr) | 2001-10-15 | 2002-10-14 | Precurseur de revetement et procede pour revetir un substrat d'une couche refractaire |
US10/491,447 US7238390B2 (en) | 2001-10-15 | 2002-10-14 | Coating precursor and method for coating a substrate with a refractory layer |
AU2002362826A AU2002362826B2 (en) | 2001-10-15 | 2002-10-14 | Coating precursor and method for coating a substrate with a refractory layer |
NO20041978A NO20041978L (no) | 2001-10-15 | 2004-05-13 | Belegningsforloper og fremgangsmate for a belegge et substrat med et motstandsdyktig lag |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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FR0113267A FR2830857B1 (fr) | 2001-10-15 | 2001-10-15 | Precurseur de revetement et procede pour revetir un substrat d'une couche refractaire |
FR01/13267 | 2001-10-15 | ||
PCT/FR2002/003485 WO2003033767A2 (fr) | 2001-10-15 | 2002-10-11 | Precurseur de revetement et procede pour revetir un substrat d'une couche refractaire |
FRPCT/FR02/03485 | 2002-10-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003033436A2 true WO2003033436A2 (fr) | 2003-04-24 |
WO2003033436A3 WO2003033436A3 (fr) | 2003-09-25 |
Family
ID=26213219
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/003515 WO2003033435A2 (fr) | 2001-10-15 | 2002-10-14 | Percurseur de revetement et procede pour revetir un substrat d'une couche refractaire |
PCT/FR2002/003517 WO2003033436A2 (fr) | 2001-10-15 | 2002-10-14 | Precurseur de revetement et procede pour revetir un substrat d'une couche refractaire |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/003515 WO2003033435A2 (fr) | 2001-10-15 | 2002-10-14 | Percurseur de revetement et procede pour revetir un substrat d'une couche refractaire |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP1438271A2 (fr) |
AU (2) | AU2002358833B9 (fr) |
CA (2) | CA2463568A1 (fr) |
WO (2) | WO2003033435A2 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021214802A1 (fr) * | 2020-04-22 | 2021-10-28 | Danieli & C. Officine Meccaniche S.P.A. | Produit métallique revêtu |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2855774B1 (fr) * | 2003-06-05 | 2005-07-08 | Pechiney Rhenalu | Procede de separation des couches de chutes de bandes plaquees par colaminage |
DE102008044396A1 (de) * | 2008-12-05 | 2010-06-10 | Wacker Chemie Ag | Hochhydrophobe Beschichtungen |
FR2997616A1 (fr) * | 2012-11-06 | 2014-05-09 | Seb Sa | Dispositif de cuisson presentant une surface de cuisson comportant un revetement antiadhesif en ceramique non oxyde ou au moins partiellement non oxyde, et article culinaire ou appareil electromenager de cuisson comportant un tel dispositif de cuisson |
JP7477643B2 (ja) * | 2020-04-22 | 2024-05-01 | ダニエリ アンド チ.オフィチーネ メカーニク エッセピア | 金属製品用のコーティング組成物および関連する方法 |
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GB1461155A (en) * | 1973-10-05 | 1977-01-13 | Sumitomo Chemical Co | Method for producing aluminum |
US4292345A (en) * | 1980-02-04 | 1981-09-29 | Kolesnik Mikhail I | Method of protecting carbon-containing component parts of metallurgical units from oxidation |
US4496469A (en) * | 1982-01-12 | 1985-01-29 | Otsuka Kagaku Yakuhin Kabushiki Kaisha | Heat-insulating refractory material consisting alkali titanate and silicon resin |
DE3638937A1 (de) * | 1986-11-14 | 1988-05-26 | Sigri Gmbh | Kathode fuer eine schmelzflusselektrolysezelle |
EP0275008A2 (fr) * | 1987-01-13 | 1988-07-20 | Bayer Ag | Poudres d'émail revêtues avec des organopolysiloxanes pour poudrage électrostatique et leur procédé de fabrication |
DE4122764A1 (de) * | 1991-07-10 | 1993-01-14 | Bayer Ag | Thermoplastische formmassen, verfahren zu deren herstellung und verfahren zur herstellung von formteilen aus keramik oder metall durch sintern |
US5215801A (en) * | 1990-08-22 | 1993-06-01 | At&T Bell Laboratories | Silicone resin electronic device encapsulant |
US5310476A (en) * | 1992-04-01 | 1994-05-10 | Moltech Invent S.A. | Application of refractory protective coatings, particularly on the surface of electrolytic cell components |
EP0601317A2 (fr) * | 1992-12-04 | 1994-06-15 | Nitto Denko Corporation | Substrat pour étiquette, encre et étiquette |
US5399441A (en) * | 1994-04-12 | 1995-03-21 | Dow Corning Corporation | Method of applying opaque coatings |
EP0834489A1 (fr) * | 1996-10-04 | 1998-04-08 | Dow Corning Corporation | Revêtements épais opaques en céramique |
US5851677A (en) * | 1995-02-03 | 1998-12-22 | Carbone Savoie | Coating composition for carbon-containing products and said coating |
EP0994158A1 (fr) * | 1998-10-14 | 2000-04-19 | Shin-Etsu Chemical Co., Ltd. | Composition organosilxane pour former d'une couche frittée |
US6210791B1 (en) * | 1995-11-30 | 2001-04-03 | General Electric Company | Article with a diffuse reflective barrier coating and a low-emissity coating thereon, and its preparation |
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2002
- 2002-10-14 CA CA002463568A patent/CA2463568A1/fr not_active Abandoned
- 2002-10-14 AU AU2002358833A patent/AU2002358833B9/en not_active Ceased
- 2002-10-14 WO PCT/FR2002/003515 patent/WO2003033435A2/fr not_active Application Discontinuation
- 2002-10-14 EP EP02793164A patent/EP1438271A2/fr not_active Withdrawn
- 2002-10-14 EP EP02790511A patent/EP1436240A2/fr not_active Withdrawn
- 2002-10-14 AU AU2002362826A patent/AU2002362826B2/en not_active Ceased
- 2002-10-14 CA CA002464340A patent/CA2464340A1/fr not_active Abandoned
- 2002-10-14 WO PCT/FR2002/003517 patent/WO2003033436A2/fr not_active Application Discontinuation
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GB1461155A (en) * | 1973-10-05 | 1977-01-13 | Sumitomo Chemical Co | Method for producing aluminum |
US4292345A (en) * | 1980-02-04 | 1981-09-29 | Kolesnik Mikhail I | Method of protecting carbon-containing component parts of metallurgical units from oxidation |
US4496469A (en) * | 1982-01-12 | 1985-01-29 | Otsuka Kagaku Yakuhin Kabushiki Kaisha | Heat-insulating refractory material consisting alkali titanate and silicon resin |
DE3638937A1 (de) * | 1986-11-14 | 1988-05-26 | Sigri Gmbh | Kathode fuer eine schmelzflusselektrolysezelle |
EP0275008A2 (fr) * | 1987-01-13 | 1988-07-20 | Bayer Ag | Poudres d'émail revêtues avec des organopolysiloxanes pour poudrage électrostatique et leur procédé de fabrication |
US5215801A (en) * | 1990-08-22 | 1993-06-01 | At&T Bell Laboratories | Silicone resin electronic device encapsulant |
DE4122764A1 (de) * | 1991-07-10 | 1993-01-14 | Bayer Ag | Thermoplastische formmassen, verfahren zu deren herstellung und verfahren zur herstellung von formteilen aus keramik oder metall durch sintern |
US5310476A (en) * | 1992-04-01 | 1994-05-10 | Moltech Invent S.A. | Application of refractory protective coatings, particularly on the surface of electrolytic cell components |
EP0601317A2 (fr) * | 1992-12-04 | 1994-06-15 | Nitto Denko Corporation | Substrat pour étiquette, encre et étiquette |
US5399441A (en) * | 1994-04-12 | 1995-03-21 | Dow Corning Corporation | Method of applying opaque coatings |
US5851677A (en) * | 1995-02-03 | 1998-12-22 | Carbone Savoie | Coating composition for carbon-containing products and said coating |
US6210791B1 (en) * | 1995-11-30 | 2001-04-03 | General Electric Company | Article with a diffuse reflective barrier coating and a low-emissity coating thereon, and its preparation |
EP0834489A1 (fr) * | 1996-10-04 | 1998-04-08 | Dow Corning Corporation | Revêtements épais opaques en céramique |
US6319973B1 (en) * | 1998-07-22 | 2001-11-20 | Dana Corporation | Solvent-free applicable heat-curing coating material |
EP0994158A1 (fr) * | 1998-10-14 | 2000-04-19 | Shin-Etsu Chemical Co., Ltd. | Composition organosilxane pour former d'une couche frittée |
EP1088908A2 (fr) * | 1999-10-01 | 2001-04-04 | General Electric Company | Méthode pour le lissage de la surface d'une couche de protection |
EP1197585A2 (fr) * | 2000-10-12 | 2002-04-17 | General Electric Company | Method for repairing a thermal barrier coating and repaired coating |
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Title |
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DATABASE WPI Section Ch, Week 200061 Derwent Publications Ltd., London, GB; Class A26, AN 2000-636812 XP002205091 & RU 2 149 168 C (SEVERSTAL STOCK CO), 20 mai 2000 (2000-05-20) * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 119 (C-1034), 12 mars 1993 (1993-03-12) & JP 04 300251 A (SHIN ETSU CHEM CO LTD), 23 octobre 1992 (1992-10-23) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021214802A1 (fr) * | 2020-04-22 | 2021-10-28 | Danieli & C. Officine Meccaniche S.P.A. | Produit métallique revêtu |
Also Published As
Publication number | Publication date |
---|---|
EP1436240A2 (fr) | 2004-07-14 |
WO2003033435A3 (fr) | 2003-09-25 |
WO2003033435A2 (fr) | 2003-04-24 |
AU2002358833B9 (en) | 2008-05-22 |
AU2002362826B2 (en) | 2007-10-18 |
AU2002358833B2 (en) | 2007-10-25 |
CA2463568A1 (fr) | 2003-04-24 |
WO2003033436A3 (fr) | 2003-09-25 |
EP1438271A2 (fr) | 2004-07-21 |
CA2464340A1 (fr) | 2003-04-24 |
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