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EP3054033B1 - Procédé de fabrication de surfaces colorées en aluminium et zinc - Google Patents

Procédé de fabrication de surfaces colorées en aluminium et zinc Download PDF

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Publication number
EP3054033B1
EP3054033B1 EP15000356.4A EP15000356A EP3054033B1 EP 3054033 B1 EP3054033 B1 EP 3054033B1 EP 15000356 A EP15000356 A EP 15000356A EP 3054033 B1 EP3054033 B1 EP 3054033B1
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EP
European Patent Office
Prior art keywords
sol
coating
pigments
gel
colored
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EP15000356.4A
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German (de)
English (en)
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EP3054033A1 (fr
Inventor
Siegfried Pießlinger-Schweiger
Olaf BÖHME
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Sepies GmbH
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Sepies GmbH
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Priority to HUE15000356A priority Critical patent/HUE042362T2/hu
Priority to EP15000356.4A priority patent/EP3054033B1/fr
Priority to ES15000356T priority patent/ES2710716T3/es
Publication of EP3054033A1 publication Critical patent/EP3054033A1/fr
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Publication of EP3054033B1 publication Critical patent/EP3054033B1/fr
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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
    • 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

Definitions

  • the present invention relates to an environmentally friendly process for producing colored surfaces on aluminum and zinc having a metallic appearance, high durability, good cleaning ability and a wide range of uses, as well as articles or metals having such surfaces.
  • Aluminum and zinc are widely used as cost-effective and easy-to-process materials for decorative and technical uses. Because of their insufficient corrosion resistance, they are usually provided with protective layers that hide the metallic character of the surfaces.
  • Coating layers consist of an organic matrix, which is enriched with pigments as desired.
  • Lacquers consist of resins that are thinned with solvent to make them spreadable or sprayable. After application, the solvents evaporate, which solidifies the paint layers.
  • Two-component paints consist of Synthetic resins which are mixed shortly before application with a reactive substance (hardener), which causes a polymerization effect, which solidifies the paints.
  • Powder coatings consist of plastic powders which are electrostatically applied to the surfaces to be painted and then thermally baked.
  • the powder layers are heated to temperatures in the range of 200 ° C to 250 ° C, whereby they melt and form a dense, smooth and closed layer after cooling.
  • Coating layers are substantially thicker than the layers according to the invention and, if they are colored, are not transparent. Metallic effects of varnish layers arise through the incorporation of corresponding metal particles as pigments. In addition, coating layers are not permanently resistant to UV rays, aging, cracking and temperatures above approx. 200 ° C. Painted metal surfaces are therefore generally not used for high-quality, durable architectural applications.
  • Anodizing is preferably applied to aluminum surfaces in order to give them the required properties with regard to corrosion and wear resistance.
  • the aluminum surfaces are immersed in an acid bath and connected in a DC circuit as an anode.
  • the oxygen liberated on the surfaces during treatment forms a layer of alumina growing with the duration of the treatment, with the aluminum going into solution. This is tough and resistant to corrosion.
  • These layers are themselves colorless and substantially thicker than layers according to the invention.
  • Anodizing is a process in which the alloy is part of the chemical reaction for film formation, which is why only special grades of aluminum (“anodizing grade”) are suitable for this process.
  • a glass-ceramic coating is provided which, on the one hand, provides transparency, i. Transparency, which enables the actual metallic surface and at the same time permanently protects it from corrosion.
  • the invention has set itself the goal of giving the surface a colorful appearance.
  • inorganic pigments are introduced into the glass-ceramic coating, which are regularly themselves classified as not transparent. Nevertheless, in order to obtain the transparency, these pigments are incorporated only in such a number and arrangement that there is no complete coverage of the overcoated metallic surface by the color pigments
  • the present invention relates to a process for producing colored surfaces on aluminum and zinc, which in addition to the color continue to have the original metallic character of the surfaces and at the same time permanently protect the surfaces against corrosion and contamination, as well as articles having such surfaces.
  • colored here means that the surface is different from the color of the untreated metal surfaces.
  • the surfaces in all colors obtainable by inorganic pigments and their mixtures, such as blue, brown, yellow, green, white, gray or black, may be colored, the metallic luster and the structure being broad by the metal surface located below the colored layer become.
  • the colored metal surfaces produced according to the invention have a transparent, glass-ceramic coating on a metal oxide layer optimized by chemical treatment, which contains inorganic (usually non-transparent) color pigments and was produced by thermal curing of a sol-gel coating.
  • a treatment of the metal surfaces in an aqueous solution containing hydrogen peroxide or other suitable oxidizing agent to obtain a homogeneous, colorless, transparent and only a few molecule layers thick oxide layer the sol Ensures gel layers with the metal surfaces.
  • the layer thickness of the sol-gel coating during application is chosen so that the finished sol-gel coating after thermal curing has a layer thickness of 0.5 to 5 .mu.m, preferably 1 to 4 microns and is pore-free dense to protect the underlying aluminum or zinc surfaces against corrosion and oxidation.
  • the coating contains inorganic color pigments, which are deliberately introduced and distributed in arrangement and number in the manner that causes special color and gloss effects. The diameter of these color pigments is preferably less than 1 .mu.m and thus regularly below the thickness of the sol-gel layer.
  • the diameters of the color pigments are in a range of 500 to 1500 nm.
  • the number and distribution of pigments per coated unit area is variable and is chosen so that the underlying metal surfaces are not completely covered by the pigments and in significant proportions by the transparent coating stay visible.
  • Quantities (g / kg) of pigments are used in the range of 40 g / kg to 200 g / kg, based on the amount of sol-gel. On the one hand, this gives the surfaces colors with selectable color depth combined with the original metallic luster and the surface structure of the metal surfaces.
  • metal and zinc hereinafter referred to as "metals” it has been found to be advantageous when a surface treatment was carried out with a peroxide solution.
  • an oxide layer is achieved in a known manner on the aluminum surface, which causes optimum adhesion of the sol-gel layers.
  • the person skilled in the precise method for obtaining an oxide layer on aluminum and zinc are known, so that at this point a detailed presentation can be omitted.
  • the surfaces according to the invention are colored, transparent reflective, inorganic, resistant to UV radiation and temperatures up to 400 ° C and corrosion. They are food-safe, water and dirt repellent and have anti-graffiti and anti-fingerprint properties.
  • the invention relates to colored metal surfaces on aluminum and zinc, which overcome the disadvantages of the previous colored metal surfaces and have significantly improved properties in terms of color, corrosion resistance and serviceability, and a method for producing such colored metal surfaces and objects with these colored metal surfaces.
  • articles made of aluminum or zinc can be completely or partially dyed.
  • the entire surfaces or only certain areas of the surfaces are colored.
  • a reference to a "surface to be colored" is therefore always to be understood in such a way that the surface to be dyed can be arranged on different surfaces of the object or else can only represent specific locations of one or more surfaces thereof.
  • the colored metal surfaces according to the invention are first conditioned by a pretreatment in such a way that they have a homogeneous metal oxide layer as adhesion promoter between the metal surface and the sol-gel coating.
  • an inorganic sol-gel coating preferably based on silicon dioxide, is applied to the conditioned surfaces, ie the treated metal oxide layer, with a layer thickness of 0.5 to 5.0 ⁇ m, preferably of 1 to 4 ⁇ m .
  • the type of coating is chosen so that it is transparent and has a baking temperature below 300 ° C, preferably from 180 ° C to 250 ° C, so that the metal surface does not soften during baking.
  • the selected sol-gel coating must have sufficient resistance to chemicals, temperature and corrosion.
  • the sol-gel coating is added inorganic pigments, the colors are freely selectable.
  • An essential property of the pigments is the size of the pigment grains. It should be in the diameter of 500 nm to 1500 nm, preferably less than 1 ⁇ m. The size of the pigments can be adjusted by prior comminution, for example by a ball mill, and secured by filtration. This can ensure that later all the pigment particles are trapped in the sol-gel layer and sufficiently covered to protect it from corrosive attack.
  • the properties of the colored glass-ceramic coating are determined exclusively by the cured sol-gel itself and the pigments have no influence on the performance characteristics of the colored coatings.
  • the defined size of the pigment granules allows a uniform distribution of the pigments on the surfaces to be coated in the coating process and improves the scattering of the incident and of the underlying Stainless steel surface reflected light and increases the optical intensity of the colors. It has been found that the inorganic color pigments should have a diameter of 500 nm to 1,500 nm.
  • the amount and distribution of the pigment grains during application of the sol-gel layers are chosen such that they do not cover the underlying metal surfaces completely, but only partially and cover them, and the latter are still partially uncovered and visible with their inherent luster and structure.
  • Quantities (g / kg) of pigments are used ranging from 40 g / kg to 200 g / kg, based on the amount of sol-gel.
  • the metallic character of the coated surfaces remains visible.
  • the amount of pigment grains per unit area color depth and color intensity are freely selectable in a wide range, ranging from metal surfaces with a slight color glimmer to intensely colored surfaces with metallic luster.
  • the result is a very wide range of highly attractive, colored metal surfaces that can not even be achieved with any of the previously known methods.
  • the metal surface between the pigment particles still remains partially visible, so that the coated metal surface still has a metallic luster.
  • the process of the invention results in extensive and spontaneous separation of pigments and coating material. As a result of this segregation, it may then come to a sedimentation of the pigments to the metal surface. This sedimentation takes place immediately after application of the coating material, whereby the coating solidifies at the same time or immediately thereafter by evaporation of the solvent contained in the coating material. As a result, a transparent, smooth cover layer of the sol-gel material is then obtained over the pigments.
  • this sol-gel coating also exerts a protective function against the pigments, which are no longer directly vulnerable to environmental influences (including corrosion).
  • metal oxide layer is meant the oxide layer formed on a metal surface by reaction of the metal with oxygen.
  • This oxide layer is colorless, transparent and consists of aluminum oxides or zinc oxides.
  • transparent colored metal surface as used herein means that a color impression by inorganic pigments in the glass-ceramic Coating is produced, however - at locations where there are no pigments - light rays can fall through the glass-ceramic coating on the underlying metal surface and are reflected by this again, so that a metallic impression.
  • step (i) zinc or aluminum (the "metals") is provided.
  • metal the “metals”
  • Preferred in accordance with the invention are zinc or aluminum alloys, as used in roof and façade architecture.
  • the metal surfaces to be colored may have different gloss levels and structures by processing before dyeing.
  • Such pre-processing methods are, for example, grinding, blasting, mechanical or electrolytic or chemical polishing, patterning or pickling.
  • the starting material may be in the form of a sheet, profile or product, e.g. as part of a finished component, present.
  • the surface of the metal to be colored should not be coated and, in particular, should be clean, free of grease and not corroded.
  • existing coatings or corrosion products may be removed mechanically or chemically prior to application of the process of the present invention.
  • the cleaning can be carried out, for example, in an alkaline decoction degreasing (for example with AK 161 from Schlötter), followed by rinsing the surface with water and drying.
  • alkaline decoction degreasing for example with AK 161 from Schlötter
  • step (ii) the surfaces to be dyed are dipped in an aqueous solution containing an oxidizing agent, preferably a peroxide, for a period of preferably 1-10 minutes. If appropriate, then a rinsing step with water.
  • an oxidizing agent preferably a peroxide
  • step (ii) should not be confused with a conventional pickling method in which metal is deliberately removed from the surface of a metallic workpiece.
  • the particular effect of the method according to the invention is attributable to the fact that initially a homogeneous metal oxide layer is produced as adhesion promoter for the subsequent sol-gel coating.
  • the aqueous solution used in the chemical treatment comprises an oxidizing agent, preferably a peroxide.
  • an oxidizing agent preferably a peroxide.
  • the workpiece is rinsed with water, preferably deionized water, and dried before the workpiece is subjected to the treatment of step (iii).
  • Step (iii) involves the formation of the glass-ceramic colored sol-gel coatings.
  • Sol-gel coatings usually consist of two reaction components, which are mixed in a fixed ratio shortly before processing. This mixture is last added as a third component, a dilution, usually an alcohol. Dilution sets the concentration of the reaction mixture and the viscosity of the final batch.
  • the sol-gel is first applied in the form of a liquid sol having colloidal particles suspended therein, which subsequently converts to a gel and, after thermal curing, finally forms a solid, hard topcoat. So if the "application of the sol-gel coating” or the “thermal curing of the sol-gel coating” is mentioned, the expert knows in which state the sol-gel system is located.
  • the sol-gel is preferably a silica sol based on silanes which are dissolved in solvents, wherein the silica sol preferably also contains one or more further sol-forming elements, preferably one or more elements from the group consisting of Al, Ti, Zr, Mg, Ca and Zn, these elements replacing the Si atoms in the colloidal structures.
  • Preferred sol-gel coatings / sol-gel coatings are in EP 2145980 described. Reference is made in particular to the in EP 2145980 described sol-gel coatings and the method for their use.
  • the starting compounds for the formation of the preferred sols and finally of the sol-gel coating are preferably hydrolyzable silanes of the formula SiR4, where the 4 radicals R 2-4 comprise hydrolyzable radicals OR 'and 0-2 comprise nonhydrolyzable radicals R ".
  • the hydrolyzable radicals OR ' are hydroxy, alkoxy and / or cycloalkoxy radicals. Suitable examples thereof include, for example, hydroxy, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, i-butoxy, t-butoxy, pentoxy, hexoxy, cyclopentyloxy, cyclohexyloxy, in particular Ethoxy, n-propoxy and isopropoxy are preferred.
  • the hydrolyzable radicals OR ' may be identical or different from one another.
  • the non-hydrolyzable radicals R " are alkyl and / or cycloalkyl radicals, suitable examples of which include, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, i-butyl, t-butyl, pentyl, hexyl, cyclopentyl, cyclohexyl radicals, with particular preference being given to methyl, ethyl, n-propyl and isopropyl radicals
  • the nonhydrolyzable radicals R " may likewise be identical or different from one another.
  • a preferred sol-gel lacquer may be the starting materials TEOS (tetraethoxyorthosilane) and MTES (methyltriethoxysilane) and / or DMDES (dimethyldiethoxysilane).
  • the starting compounds are partially hydrolyzed to the corresponding hydroxy compounds (such as orthosilicic acid, trihydroxyalkylsilane, etc.), which can be promoted by the addition of a catalyst such as acid. Due to the high tendency for condensation of these hydroxy compounds, these can now condense with elimination of water to form smaller siloxane networks.
  • the sol already contains colloidal particles containing siloxane bonds. Siloxane bonds are bonds of the form ⁇ Si-O-Si ⁇ , where " ⁇ " is any three independent bonds with other elements, in particular with OH, OR 'and R ", which gives rise to a three-dimensional cross-linked structure in the colloidal particles, where OR' and R" have the same meaning as above.
  • the sol-gel coating preferably has a stoving temperature of below 300 ° C, preferably from 180 ° C to 250 ° C, on.
  • the sol-gel coating is colorless before the addition of the inorganic color pigments.
  • the color pigments are preferably applied as a suspension in the sol-gel.
  • the amount of color pigments is adjusted such that the coated surfaces are only partially covered by pigments, so that preferably the metal surface arranged below the glass-ceramic layer is visible through the glass-ceramic layer at the locations where no inorganic color pigments are present.
  • degree of coverage of inorganic color pigments ie by the proportion by weight of the inorganic color pigments in the sol-gel, color intensity and depth can be adjusted.
  • the viscosity of the sol-gel varnish can be adjusted by a person skilled in the art. It is known that the sol, with a correspondingly high dilution in its solvent, is sufficiently low-viscosity to be applied by spraying, spraying, rolling or brushing. Suitable solvents for the sol are water and especially alcohols such as methanol, ethanol, n-propanol or isopropanol, with ethanol and isopropanol being preferred because of their physical properties and the low toxicity of their vapors.
  • the sol-gel used in step (iii) contains inorganic color pigments, eg SICOCER® Black 10901, SICOCER® Blue 2502, or SICOCER® Red 2355 from BASF.
  • one or more types of inorganic color pigments can be used. If different types of color pigments are used, they can be used in equal or different amounts. Quantities (g / kg) of pigments are used in the range of 40g / kg to 200g / kg, based on the amount of sol-gel. The amount of pigments (g / kg) is normalized by the specific gravity of the pigments so that always the same number of pigment grains per unit area (pigment density) is achieved.
  • the inorganic color pigments preferably have a maximum diameter of less than 1 ⁇ m.
  • the desired maximum diameter is ensured by sieving or filtration processes.
  • the admixture of the pigments is carried out in the dilution, whereby the desired concentration of pigments in the final mixture is easily targeted.
  • a suspension of the pigments is prepared by intensive stirring, the homogeneity of which is crucial for the uniformity of the coated surfaces. Since the density of the dilution and the pigments differ significantly, it is necessary throughout the entire production and coating process to mix sufficiently intensively in order to keep the suspension stable.
  • the sol-gel coating prior to application, has a low viscosity similar to water and a significantly lower specific gravity than the suspended pigments. Therefore, the suspensions separate immediately after application and the pigments attach to the metal surfaces. Due to the small size of the pigment grains thus a sufficient coverage of the pigment grains is ensured by the sol-gel layer.
  • the properties of the coated metal surfaces are thus determined solely by the properties of the sol-gel coating used and not by the properties of the processed pigments.
  • the sol-gel coating in step (iii) is preferably applied by spraying or rolling, spraying or painting are also possible. Preferably, however, it is done by spraying, since this allows precise control of the amount applied per unit area.
  • step (iii) is preferably carried out at a temperature of below 300 ° C, preferably in a range of 160 ° C to 280 ° C.
  • the curing is preferably carried out for a period of about 20 to 60, preferably 30 minutes at temperatures in the range of 160 ° C to 280 ° C, preferably 180 ° C to 220 ° C in air.
  • the sol-gel (if the color pigments are disregarded) changes to a colorless, transparent, glassy layer.
  • the thermal curing can be carried out regularly in the process according to the invention so that neither the color of the sol-gel coating nor the underlying metal surface is changed. That is, the thermal stress of both the sol gel and the metal surface does not cause discoloration that does not originate in the color pigments themselves.
  • the glass-ceramic coating preferably has a thickness of 0.5-5.0 ⁇ m, preferably 1.0-5.0 ⁇ m, or 0.5-3.0 ⁇ m, and most preferably 1.0-4.0 ⁇ m.
  • the glass-ceramic coating preferably has a uniform thickness with fluctuations of preferably less than 10% of the layer thickness.
  • the diameter of the inorganic color pigments / pigments is smaller than the diameter of the glass-ceramic coating which was produced from the sol-gel coating.
  • Pigments whose diameter is equal to or greater than the layer thickness of the sol-gel layer are not or not sufficiently covered and protrude from the surface of the coating. They roughen the surface and are themselves exposed to the effects of corrosion and can cause pores in the coating resulting in localized corrosion of the underlying metal surface
  • the inventive method is largely independent of the alloy and the structure of the metal.
  • the method according to the invention is applied to a metal component which consists of composite parts which are uniformly colored by the method according to the invention.
  • the parts can be colored uniformly largely independent of their shape and shape.
  • the glass-ceramic coating according to the invention which was produced from the sol-gel coating, is transparent and not opaque. In particular, it has a metallic luster and reflects, depending on the density of the pigments, a substantial portion of the incident light. As a result, the surfaces appear much lighter in comparison to chemically colored surfaces.
  • the coating is heat-resistant, whereby the color effect at temperatures up to 400 ° C persists and can withstand at least 200 hours of stress in the salt spray test without damage.
  • the invention also relates to aluminum and zinc having a colored surface or objects made from these metals or having a surface made of these metals, wherein the metal surface has a transparent, glass-ceramic coating containing inorganic color pigments.
  • the colored surface can be prepared according to the method described herein. All embodiments described with respect to the method of the invention are also applicable to the colored surface products. In particular, the oxide layer and glass-ceramic layer described with regard to the method is present on the metal with a colored surface.
  • the metal surface is regularly only partially covered or optically hidden by the inorganic color pigments, so that a metallic surface arranged below the glass-ceramic layer is visible through the glass-ceramic layer at the points where no inorganic color pigments are present are.
  • the luster and structure of colored metal surfaces also show the gloss and structure of the underlying metal surfaces.
  • the invention broadly relates to a metal surface on aluminum or zinc which is provided with a transparent, colored glass-ceramic coating.
  • the color of the coating results from the selected inorganic color pigments. These color pigments regularly have a diameter of 500 to 1500 nm.
  • a metallic luster which very probably results from the metallic surface underlying the coating, is retained. This would not be possible in coatings with smaller pigments, since these would not sediment on the metal surface, but would conceal the metal surface floating within the layer.
  • the invention also relates to colored aluminum or zinc surfaces, prepared or preparable by the method according to the invention.
  • An aluminum sheet of 1.0 mm with bare electropolished surface and the dimensions 800 x 800 mm was cleaned in an alkaline Abkochentfettung for 5 minutes by dipping and then rinsed in water. Subsequently, the sheet was immersed for 10 minutes in an aqueous solution of 20% hydrogen peroxide at room temperature. Subsequently, the sheet was lying by spraying coated with a layer thickness of 3 microns.
  • a sol-gel coating based on silicon dioxide (POLIANT from POLIGRAT GmbH) was used, which was mixed with 100 g / kg of a blue pigment (SICOCER® Blue 2502). The pigment was ground into the dilution prior to admixing to a particle size below 1 ⁇ m. Subsequently, the surface was dried for 10 minutes and then baked in the oven at 200 ° C for 30 minutes. After cooling, the surface showed a shiny metallic surface with intense blue, whereby a clear reflection of the environment in its natural colors was visible in the surface. The surface was smooth, hydrophobic and showed no fingerprints after touching. The surface was sharp-edged bent by 180 ° without cracks, color change or detachment of the layer to show.
  • a zinc sheet of 1.2 mm thickness with rolled bright surface was pretreated as described in Example 1 and then lying coated with a sol-gel coating based on silica (POLIANT from POLIGRAT GmbH), wherein the dilution is a copper-red pigment (SICOCER® Red 2355) was mixed in an amount of 80 g / kg and this was then mixed with the product.
  • the particle size of the pigment was less than 1 ⁇ m in diameter.
  • the surface felt smooth and metallic. It was hydrophobic and showed no fingerprints when touched. She passed the salt spray test for over 200 hours and, after sharp-edged bending by 180 °, showed no cracks, color change or peeling off of the layer in the area of the fold.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
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Claims (7)

  1. Procédé de réalisation d'un revêtement transparent, coloré à l'aide de pigments minéraux, sur de l'aluminium ou du zinc, le brillant métallique et la structure de la surface métallique sous-jacente au revêtement restent visibles, le procédé comprenant les étapes suivantes :
    - traiter la surface avec une solution aqueuse contenant un oxydant, l'application d'un revêtement transparent de sol-gel de dioxyde de silicium, contenant des pigments minéraux ayant un diamètre de 500 nm à 1500 nm, sur la surface, les pigments étant utilisés dans une quantité de 40 g/kg à 200 g/kg, sur la base de la quantité de sol-gel utilisée, et
    - faire durcir par voie thermique le revêtement appliqué, un revêtement vitrocéramique transparent étant produit dans lequel la surface revêtue n'est pas complètement recouverte par les pigments de couleur et le revêtement vitrocéramique ayant une épaisseur de 0,5 à 5,0 µm.
  2. Procédé selon la revendication 1,
    dans lequel les pigments de couleur minéraux ont un diamètre maximal de 1 µm.
  3. Procédé selon la revendication 1 ou la revendication 2,
    dans lequel le revêtement vitrocéramique a une épaisseur de 0,5 à 3,0 µm.
  4. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel le revêtement sol-gel de l'étape (iii) est appliqué par pulvérisation, aspersion ou laminage.
  5. Procédé selon l'une des revendications précédentes,
    dans lequel le durcissement thermique de l'étape (iii) est effectué à une température inférieure à 300 °C, de préférence dans une gamme allant de 160 °C à 280 °C.
  6. Procédé selon l'une des revendications précédentes,
    dans lequel le sol-gel est un sol de silice à base de silanes qui sont dissous dans un solvant, le sol de silice contenant de préférence également au moins un autre élément formant un sol, de préférence au moins un élément du groupe comprenant Al, Ti, Zr, Mg, Ca et Zn, ces éléments remplaçant les atomes de Si dans les structures colloïdales.
  7. Aluminium ou zinc pourvu d'un revêtement coloré à l'aide de pigments minéraux,
    la surface métallique comportant un revêtement vitrocéramique transparent qui contient des pigments de couleur minéraux, l'éclat métallique et la structure de la surface métallique sous-jacente au revêtement étant visibles et pouvant être obtenus par un procédé selon l'une des revendications 1 à 6.
EP15000356.4A 2015-02-06 2015-02-06 Procédé de fabrication de surfaces colorées en aluminium et zinc Active EP3054033B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
HUE15000356A HUE042362T2 (hu) 2015-02-06 2015-02-06 Eljárás színezett felület elõállítására alumínium és cink felületeken
EP15000356.4A EP3054033B1 (fr) 2015-02-06 2015-02-06 Procédé de fabrication de surfaces colorées en aluminium et zinc
ES15000356T ES2710716T3 (es) 2015-02-06 2015-02-06 Procedimiento para producir superficies coloreadas sobre aluminio y cinc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15000356.4A EP3054033B1 (fr) 2015-02-06 2015-02-06 Procédé de fabrication de surfaces colorées en aluminium et zinc

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EP3054033A1 EP3054033A1 (fr) 2016-08-10
EP3054033B1 true EP3054033B1 (fr) 2018-11-28

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ES (1) ES2710716T3 (fr)
HU (1) HUE042362T2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180230600A1 (en) * 2015-08-05 2018-08-16 Sepies Gmbh Abrasion- and Peel-Resistant Sol-Gel Coating on Aluminum and Method for Producing a Coating of This Type

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19813709A1 (de) * 1998-03-27 1999-09-30 Inst Neue Mat Gemein Gmbh Verfahren zum Schutz eines metallischen Substrats vor Korrosion
EP1179575A2 (fr) * 2000-08-06 2002-02-13 NTC Nanotech Coatings GmbH Procédé de préparation des compositions pigmentées par procédé sol-gel et ces compositions

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DE19715940C2 (de) 1996-10-10 2003-04-24 Youngbok Cho Verfahren zum Zubereiten einer keramischen Masse und Verfahren zum Aufbringen eines Überzugs aus dieser keramischen Masse auf ein Trägermaterial
US6605365B1 (en) * 1996-11-04 2003-08-12 The Boeing Company Pigmented alkoxyzirconium sol
DE10141687A1 (de) * 2001-08-25 2003-03-06 Degussa Siliciumverbindungen enthaltendes Mittel zur Beschichtung von Oberflächen
EP2145980A1 (fr) 2008-07-07 2010-01-20 Poligrat Gmbh Surface d'acier noble coloré et procédé de coloration d'acier noble

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DE19813709A1 (de) * 1998-03-27 1999-09-30 Inst Neue Mat Gemein Gmbh Verfahren zum Schutz eines metallischen Substrats vor Korrosion
EP1179575A2 (fr) * 2000-08-06 2002-02-13 NTC Nanotech Coatings GmbH Procédé de préparation des compositions pigmentées par procédé sol-gel et ces compositions

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EP3054033A1 (fr) 2016-08-10
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