EP3020852B1 - Method for producing a scratch and dirt tolerant surface of a metal component and metal component comprising same - Google Patents
Method for producing a scratch and dirt tolerant surface of a metal component and metal component comprising same Download PDFInfo
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- EP3020852B1 EP3020852B1 EP15003222.5A EP15003222A EP3020852B1 EP 3020852 B1 EP3020852 B1 EP 3020852B1 EP 15003222 A EP15003222 A EP 15003222A EP 3020852 B1 EP3020852 B1 EP 3020852B1
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- metal component
- lacquer
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- 229910052751 metal Inorganic materials 0.000 title claims description 52
- 239000002184 metal Substances 0.000 title claims description 52
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 claims description 35
- 239000004922 lacquer Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 238000004040 coloring Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 5
- 238000005422 blasting Methods 0.000 claims description 5
- 238000003618 dip coating Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000005554 pickling Methods 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000003973 paint Substances 0.000 description 14
- 238000005240 physical vapour deposition Methods 0.000 description 5
- 239000003086 colorant Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000004043 dyeing Methods 0.000 description 3
- 238000001652 electrophoretic deposition Methods 0.000 description 3
- 230000003678 scratch resistant effect Effects 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000003925 fat Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/08—Rinsing
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/26—Anodisation of refractory metals or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
Definitions
- the invention relates to a method for producing a scratch-resistant and contamination-tolerant surface of a metal component, made of titanium or a titanium alloy, and a metal component made of titanium or a titanium alloy provided with such a surface.
- Known processes for coloring titanium metal components consist of, for example, high-vacuum coating (PVD), coloring the parts by anodic oxidation (anodization) or by painting the metal components with colored lacquers.
- EP 0294 610 A1 A one-step electrochemical imaging method for reproduction layers is known EP 0294 610 A1 in which an organic substance can be deposited by means of current pulses on an electrically conductive substrate in a point-like or planar manner, but in each case a closed layer is produced which completely covers the underlying substrate.
- CN 101293460 A In another known surface decoration method for light metal materials, CN 101293460 A also, by forming an anodic oxide film and then spray coating with a lacquer layer and an additional electrophoretic coating of an engraving in this lacquer layer, a more uniform and smoother multicolor is also formed Surface coating film produced, but always covers the underlying surface over the entire surface.
- the DE 1 521 755 A1 discloses a method of making a durable scratch resistant surface on porous anodized surfaces by closing these pores by densely bonded particles by electrophoresis.
- PVD high vacuum coating
- the color spectrum is very limited, as it can only produce blacks, grays and gold tones.
- such surfaces are very fingerprint sensitive, since, for example, contact with skin body fats leads to these surfaces immediately to color changes of the metal component in the contact area, which can only be remedied by thoroughly cleaning the surface again.
- the problem with anodic oxidation is also the very high fingerprint sensitivity of the colored surface, which is even greater than with a PVD coating.
- Another disadvantage of anodic oxidation is the sensitivity of the surface to scratches and pressure generated in the corresponding surface Immediately leads to a permanent color change.
- the object of the invention is to provide a method for producing a metal component made of titanium or titanium alloys with a scratch-resistant and contamination-tolerant surface and a metal component provided with such a surface.
- the essential feature of the method according to the invention is first of all that the advantages of the hitherto known coating methods for coloring in the inventive method and in the coated metal component are retained, for example the advantage of a PVD coating that the coloring forms a bond with the metal surface, so that also a damaged color layer does not flake off.
- the third method step makes a significant contribution to the metal component for only partial coating with a layer thickness , which is lower than the roughness of the surface of the metal component is high, is coated in a cathodic dip coating (KDL) method with a transparent paint, which extends from a profile bottom to just below the remaining profile tufts of roughness, so that no up to Can adjust profile ground extending contaminants of the surface of the metal component, since this surface is largely covered by the transparent paint. Dimensional changes of the metal component do not take place, so that its original fit remains unchanged.
- KDL cathodic dip coating
- the third step of the cathodic dip coating process takes place until the approximately 75% to a maximum of 98% of the surface of the metal component is coated by the profile base outwardly building with the paint layer of the transparent paint and is then canceled, so that the remaining 25% to 2% of the base material extend freely upwards from the paint, which leaves a metallic surface feeling to a person who touches the metal component, without endogenous perspiration, grease or sweat can reach the profiled ground roughness of the surface of the metal component, since this Interspace filled with the paint.
- This paint is baked in a drying oven in a fourth process step, so that after a previous first step of pickling the metal component to a complete liberation of an oxide layer and a subsequent anodic oxidation for coloring the metal component with different interference colors, a color layer on the metal component can be generated which together with the cathodic dip coating with clear coat leads to the desired surface function of the metal component, which is scratch and contamination tolerant.
- a matte surface of the metal component is obtained in the desired color, which is still very similar in feel to a metal surface, since when touching such a metal component only the coated profile tips of the metallic base material are felt.
- the fingerprint sensitivity is due to the transparent varnish Completely resolved because this paint has settled on the profile base and there is a connection with the metal surface.
- This is achieved via an electrophoretic deposition, in which a migration of colloidally dissolved paint particles and the deposition on the metal component can be accurately controlled as an electrode by applying an electrical voltage. With the precise control of this electrochemical process, minimal deposition of the paint is achieved only in the deeper areas of the surface roughness of the metal component.
- the electrophoretic deposition of the protective coating protects the underlying oxide layer against external influences. Sweat or body fats, which would cause a change in color due to different refraction of light, can no longer penetrate through this protective coating to the profile base, so that it can be ensured that the appearance of providing such a coating metal component always remains identical. Accordingly, the transparent lacquer is a placeholder for otherwise settling there dirt and is also transparent, so that no color changes can occur when using a provided with such a surface component.
- the lacquer is set back in relation to the profile tips only in the material troughs, it does not bear, is virtually infinitely thin and can not be scratched and / or damaged, whereby a total of one surface of a metal component is made available with a very large amount large color palette of anodising and one.
- Strength of a PVD coating but without any fingerprint sensitivity.
- the paint surrounds even complicated structures evenly and without runners or dripping, so that all edges and corners get a smooth course with it.
- additional intermediate steps can be inserted between the individual process steps, each relating to rinsing operations, in particular with demineralized water, so-called demineralized water, these intermediate steps being able to take place in stationary rinses or flowing rinses and additionally the demineralised water Wetting agent can be added.
- the first method step is preceded by a method step in which the roughening of the surface and removal of a possible oxide layer of the surface of the metal component is blasted with a coarse-grained blasting material, blasting being preferably noble corundum (EK080) or sharp-edged stainless steel (EDK080) is used.
- a coarse-grained blasting material blasting being preferably noble corundum (EK080) or sharp-edged stainless steel (EDK080) is used.
- EK080 noble corundum
- EDK080 sharp-edged stainless steel
- the surface of the metal component 1 has a roughness, with adjacent profile peaks 5 and valleys located therebetween with a profiled base 4, wherein the valley-shaped interspaces are so far felt with a transparent lacquer 3, that only the profile tips 5 continue to protrude from this lacquer layer.
- the roughness index of the surface of the metal component 1 may be approximately N7, with an arithmetic mean roughness Ra of 1.6 and a surface roughness of approximately 10 ⁇ m.
- the roughness indices may, however, also deviate by +/- 1, with arithmetic mean roughness values of 0.8 at N6 and 3.2 at N8 as roughness indices and with corresponding roughness depths of 4-6.3 ⁇ m or 16-25 ⁇ m.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer verkratzungs- und verschmutzungstoleranten Oberfläche eines Metallbauteils, aus Titan oder einer Titanlegierung, und ein mit einer solchen Oberfläche versehenes Metallbauteil aus Titan oder einer Titanlegierung. Bekannte Verfahren zur Farbgebung von Metallbauteilen aus Titan bestehen etwa aus einer Hochvakuumbeschichtung (PVD), dem Einfärben der Teile durch anodische Oxidation (Anodisieren) oder durch das Lackieren der Metallbauteile mit Farblacken.The invention relates to a method for producing a scratch-resistant and contamination-tolerant surface of a metal component, made of titanium or a titanium alloy, and a metal component made of titanium or a titanium alloy provided with such a surface. Known processes for coloring titanium metal components consist of, for example, high-vacuum coating (PVD), coloring the parts by anodic oxidation (anodization) or by painting the metal components with colored lacquers.
Es ist ein einstufiges elektrochemisches Bilderzeugungsverfahren für Reproduktionsschichten bekannt,
Bei einem anderen bekannten Oberflächendekorationsverfahren für Leichtmetallwerkstoffe,
Ein anders Verfahren zur Erzeugung von Korrosionsschutzschichten auf Oberflächen aus Magnesium oder Magnesiumlegierungen,
Aus der
Die
Problematisch bei der Hochvakuumbeschichtung (PVD) ist, dass das Farbspektrum sehr begrenzt ist, da damit nur Schwarztöne, Grautöne und Goldtöne erzeugt werden können. Zudem sind solche Oberflächen sehr fingerprintempfindlich, da beispielsweise Kontakt mit Hautkörperfetten bei diesen Oberflächen sofort zu Farbveränderungen des Metallbauteiles im Kontaktbereich führt, was nur durch gründliches Reinigen des Oberfläche wieder behoben werden kann. Die Problematik bei der anodischen Oxidation liegt ebenfalls in der sehr hohen Fingerprintempfindlichkeit der gefärbten Oberfläche, die noch größer ist als bei einer PVD-Beschichtung. Ein weiterer Nachteil der anodischen Oxidation besteht in der Empfindlichkeit der erzeugten Oberfläche gegen Kratzer und Druck, der in dem entsprechenden Bereich sofort zu einer bleibenden Farbveränderung führt. Das Problem beim Lackieren von Metallbauteilen aus Titan mit Farblacken besteht darin, dass es sehr schwierig ist, eine gute Haftung eines Lackes auf der Titanoberfläche zu erzielen, weil sich das Titanmaterial an der Luft sehr schnell mit einer Oxidschicht überzieht. Nachteilig ist zudem, dass eine solche Lackschicht, sobald sie durch einen Kratzer verletzt ist, beginnt weiter abzublättern.The problem with high vacuum coating (PVD) is that the color spectrum is very limited, as it can only produce blacks, grays and gold tones. In addition, such surfaces are very fingerprint sensitive, since, for example, contact with skin body fats leads to these surfaces immediately to color changes of the metal component in the contact area, which can only be remedied by thoroughly cleaning the surface again. The problem with anodic oxidation is also the very high fingerprint sensitivity of the colored surface, which is even greater than with a PVD coating. Another disadvantage of anodic oxidation is the sensitivity of the surface to scratches and pressure generated in the corresponding surface Immediately leads to a permanent color change. The problem with painting titanium metal parts with colored lacquers is that it is very difficult to achieve good adhesion of a lacquer to the titanium surface because the titanium material in the air very quickly becomes coated with an oxide layer. Another disadvantage is that such a lacquer layer, as soon as it is injured by a scratch, begins to flake off.
Aufgabe der Erfindung ist es, ein Verfahren zur Herstellung eines Metallbauteils aus Titan oder Titanlegierungen mit einer verkratzungs- und verschmutzungstoleranten Oberfläche sowie ein mit einer solchen Oberfläche versehenes Metallbauteil zur Verfügung zu stellen.The object of the invention is to provide a method for producing a metal component made of titanium or titanium alloys with a scratch-resistant and contamination-tolerant surface and a metal component provided with such a surface.
Die Lösung dieser Aufgabe ergibt sich in Verbindung mit den Merkmalen der Oberbegriffe der Ansprüche 1 und 7 erfindungsgemäß durch die technischen Merkmale deren kennzeichnender Teile.The solution of this problem arises in conjunction with the features of the preambles of claims 1 and 7 according to the invention by the technical characteristics of their characterizing parts.
Wesentlich an dem erfindungsgemäßen Verfahren ist zunächst, dass die Vorteile der bisher bekannten Beschichtungsverfahren zur Farbgebung bei dem erfinderischen Verfahren und bei dem beschichteten Metallbauteil erhalten bleiben, etwa der Vorteil einer PVD-Beschichtung, dass die Farbgebung eine Verbindung mit der Metalloberfläche eingeht, sodass auch eine verletzte Farbschicht nicht weiter abblättert. Der Vorteil der anodischen Oxidation, die ganz ohne Einlagerung zusätzlicher Farbkörper, je nach Schichtdicke, eine sehr große Farbpalette von Interferenzfarben aufweist, bleibt ebenfalls erhalten, wobei insbesondere der dritte Verfahrensschritt einen wesentlichen Beitrag dazu leistet, indem das Metallbauteil zur nur teilweisen Beschichtung mit einer Schichtdicke, die geringer ist als die Rauigkeit der Oberfläche des Metallbauteils hoch ist, in einem kathodischen Tauchlackierungsverfahren (KDL-Verfahren) mit einem transparenten Lack beschichtet wird, der sich von einem Profilgrund bis kurz unter die freibleibenden Profilspitzen der Rauigkeit erstreckt, sodass keine sich bis zum Profilgrund erstreckenden Verschmutzungen der Oberfläche des Metallbauteils einstellen können, da diese Fläche größtenteils von dem transparentem Lack bedeckt ist. Maßänderungen des Metallbauteils finden dabei nicht statt, sodass seine ursprüngliche Passgenauigkeit unverändert erhalten bleibt.The essential feature of the method according to the invention is first of all that the advantages of the hitherto known coating methods for coloring in the inventive method and in the coated metal component are retained, for example the advantage of a PVD coating that the coloring forms a bond with the metal surface, so that also a damaged color layer does not flake off. The advantage of anodic oxidation, which has a very large color range of interference colors without incorporation of additional color bodies, depending on the layer thickness, is also retained, in particular the third method step makes a significant contribution to the metal component for only partial coating with a layer thickness , which is lower than the roughness of the surface of the metal component is high, is coated in a cathodic dip coating (KDL) method with a transparent paint, which extends from a profile bottom to just below the remaining profile tufts of roughness, so that no up to Can adjust profile ground extending contaminants of the surface of the metal component, since this surface is largely covered by the transparent paint. Dimensional changes of the metal component do not take place, so that its original fit remains unchanged.
Der dritte Verfahrensschritt des kathodischen Tauchlackierungsverfahrens erfolgt dabei so lange, bis das etwa 75% bis maximal 98% der Oberfläche des Metallbauteiles sich vom Profilgrund nach außen aufbauend mit der Lackschicht aus dem transparenten Lack beschichtet ist und wird dann abgebrochen, sodass sich die restlichen 25% bis 2% des Grundmaterials frei nach oben aus dem Lack erstrecken, wodurch für eine Person, die das Metallbauteil anfasst, ein metallisches Oberflächengefühl verbleibt, ohne dass körpereigene Ausdünstungen, Fett oder Schweiß bis zum Profilgrund der Rauigkeit der Oberfläche des Metallbauteils gelangen können, da dieser Zwischenraum mit dem Lack ausgefüllt ist.The third step of the cathodic dip coating process takes place until the approximately 75% to a maximum of 98% of the surface of the metal component is coated by the profile base outwardly building with the paint layer of the transparent paint and is then canceled, so that the remaining 25% to 2% of the base material extend freely upwards from the paint, which leaves a metallic surface feeling to a person who touches the metal component, without endogenous perspiration, grease or sweat can reach the profiled ground roughness of the surface of the metal component, since this Interspace filled with the paint.
Dieser Lack wird in einem vierten Verfahrensschritt in einem Trockenofen eingebrannt, sodass sich nach einem vorherigen ersten Verfahrensschritt des Beizens des Metallbauteils zu einer vollständigen Befreiung von einer Oxidschicht und einer anschließenden anodischen Oxidation zur Farbgebung des Metallbauteils mit unterschiedlichen Interferenzfarben eine Farbschicht auf dem Metallbauteil erzeugen lässt, die gemeinsam mit der kathodischen Tauchlackierung mit Klarlack zu der gewünschten Oberflächenfunktion des Metallbauteils führt, die verkratzungs- und verschmutzungstolerant ist.This paint is baked in a drying oven in a fourth process step, so that after a previous first step of pickling the metal component to a complete liberation of an oxide layer and a subsequent anodic oxidation for coloring the metal component with different interference colors, a color layer on the metal component can be generated which together with the cathodic dip coating with clear coat leads to the desired surface function of the metal component, which is scratch and contamination tolerant.
Durch dieses Verfahren erhält man in der gewünschten Farbgebung eine matte Oberfläche des Metallbauteils, die in der Haptik noch sehr stark einer Metalloberfläche ähnelt, da beim Anfassen eines solchen Metallbauteils nur die beschichteten Profilspitzen des metallischen Grundmaterials erfühlt werden. Die Fingerprintempfindlichkeit wird durch den transparenten Lack vollständig behoben, weil sich dieser Lack auf dem Profilgrund abgesetzt hat und dort eine Verbindung mit der Metalloberfläche eingegangen ist. Dies wird über eine elektrophoretische Abscheidung erzielt, bei der durch Anlegen einer elektrischen Spannung eine Wanderung kolloidal gelöster Lackpartikel und die Abscheidung auf dem Metallbauteil als Elektrode genau kontrolliert werden kann. Mit der präzisen Steuerung dieses elektrochemischen Verfahrens wird eine minimale Abscheidung des Lackes ausschließlich in den tiefer liegenden Bereichen der Oberflächenrauigkeiten des Metallbauteils erreicht.By this method, a matte surface of the metal component is obtained in the desired color, which is still very similar in feel to a metal surface, since when touching such a metal component only the coated profile tips of the metallic base material are felt. The fingerprint sensitivity is due to the transparent varnish Completely resolved because this paint has settled on the profile base and there is a connection with the metal surface. This is achieved via an electrophoretic deposition, in which a migration of colloidally dissolved paint particles and the deposition on the metal component can be accurately controlled as an electrode by applying an electrical voltage. With the precise control of this electrochemical process, minimal deposition of the paint is achieved only in the deeper areas of the surface roughness of the metal component.
Durch die elektrophoretische Abscheidung des Schutzlackes wird die darunter liegende Oxidschicht gegen äußere Einflüsse geschützt. Schweiß oder Körperfette, die eine Farbveränderung in Folge von unterschiedlicher Lichtbrechung verursachen würden, können durch diesen Schutzlack nicht mehr bis auf den Profilgrund vordringen, sodass sichergestellt werden kann, dass das Aussehen eines mit einer solchen Beschichtung versehendes Metallbauteils stets identisch bleibt. Der transparente Lack stellt demnach einen Platzhalter für sich ansonsten dort absetzen könnenden Schmutz dar und ist zudem durchsichtig, sodass keine Farbveränderungen bei der Benutzung eines mit einer solchen Oberfläche versehenden Bauteils erfolgen kann. Dadurch, dass der Lack gegenüber den Profilspitzen zurückgesetzt nur in den Werkstofftälern angeordnet ist, trägt er nicht auf, ist quasi unendlich dünn und lässt er sich nicht verkratzen und / oder beschädigen, wodurch insgesamt eine Oberfläche eines Metallbauteils zur Verfügung gestellt wird, mit einer sehr großen Farbpalette des Anodisierens und einer. Festigkeit einer PVD-Beschichtung, jedoch ohne jegliche Fingerprintempfindlichkeit. Weiterhin umgibt der Lack auch komplizierte Strukturen gleichmäßig und ohne Läufer oder Tropfenbildung, sodass mit ihm alle Kanten und Ecken einen glatten Verlauf erhalten.The electrophoretic deposition of the protective coating protects the underlying oxide layer against external influences. Sweat or body fats, which would cause a change in color due to different refraction of light, can no longer penetrate through this protective coating to the profile base, so that it can be ensured that the appearance of providing such a coating metal component always remains identical. Accordingly, the transparent lacquer is a placeholder for otherwise settling there dirt and is also transparent, so that no color changes can occur when using a provided with such a surface component. Due to the fact that the lacquer is set back in relation to the profile tips only in the material troughs, it does not bear, is virtually infinitely thin and can not be scratched and / or damaged, whereby a total of one surface of a metal component is made available with a very large amount large color palette of anodising and one. Strength of a PVD coating, but without any fingerprint sensitivity. Furthermore, the paint surrounds even complicated structures evenly and without runners or dripping, so that all edges and corners get a smooth course with it.
Weitere vorteilhafte Ausgestaltungen des Verfahrens ergeben sich mit und in Kombination aus den nachfolgenden Unteransprüchen.Further advantageous embodiments of the method will become apparent with and in combination from the following subclaims.
Zur Sicherstellung eines zum gewünschten Fertigungsziel führenden Herstellungsverfahrens können zwischen den einzelnen Verfahrensschritten weitere Zwischenschritte eingefügt werden, die jeweils Spülvorgänge betreffen, insbesondere mit voll entsalztem Wasser, sogenanntem VE-Wasser, wobei diese Zwischenschritte in Standspülen oder Fließspülen erfolgen können und dem VE-Wasser zusätzlich auch Benetzungsmittel beigefügt werden können.To ensure a manufacturing process leading to the desired manufacturing objective, additional intermediate steps can be inserted between the individual process steps, each relating to rinsing operations, in particular with demineralized water, so-called demineralized water, these intermediate steps being able to take place in stationary rinses or flowing rinses and additionally the demineralised water Wetting agent can be added.
Entsprechend einer besonders bevorzugten Ausführungsform des vorliegenden Verfahrens ist dem ersten Verfahrensschritt ein Verfahrensschritt vorgeschaltet, in dem zur Aufrauhung der Oberfläche und Entfernung einer möglichen Oxidschicht der Oberfläche des Metallbauteils dieses mit einem grobkörnigen Strahlgut gestrahlt wird, wobei als Strahlgut bevorzugt Edelkorund (EK080) oder scharfkantiger Edelstahl (EDK080) verwandt wird. Durch dieses Strahlen wird gewährleistet, dass die bevorzugte Rauigkeit der Oberfläche des Metallbauteils an allen Stellen gewährleistet ist, sodass das Produktergebnis auf allen Oberflächen des Metallbauteils sicher erzielt werden kann.According to a particularly preferred embodiment of the present method, the first method step is preceded by a method step in which the roughening of the surface and removal of a possible oxide layer of the surface of the metal component is blasted with a coarse-grained blasting material, blasting being preferably noble corundum (EK080) or sharp-edged stainless steel (EDK080) is used. This blasting ensures that the preferred roughness of the surface of the metal component is ensured at all points, so that the product result on all surfaces of the metal component can be achieved safely.
Eine vorteilhafte Erweiterung der Farbpallette wird durch Tauchfärben mit farbigem Lack erzielt.An advantageous extension of the color pallet is achieved by dip dyeing with colored paint.
Nachfolgend ist ein Metallbauteil anhand einer Zeichnung näher beschrieben. Es zeigt:
- Fig. 1.
- einen starkvergrößerten Bereich der mit dem erfinderischen Verfahren beschichteten Oberfläche eines Metallbauteils.
- Fig. 1.
- a greatly enlarged area of the coated with the inventive method surface of a metal component.
Die Oberfläche des Metallbauteils 1 weist eine Rauigkeit auf, mit benachbarten Profilspitzen 5 und dazwischen befindlichen Tälern mit einem Profilgrund 4, wobei die talförmigen Zwischenräume mit einem transparenten Lack 3 soweit ausgefühlt sind, dass nur noch die Profilspitzen 5 weiter aus dieser Lackschicht hervorstehen.The surface of the metal component 1 has a roughness, with
Der transparente Lack 3, mit dem die Oberfläche des Metallbauteils (1) zwischen 75% und 98% beschichtet ist, ermöglicht das Durchscheinen der auf der Oberfläche des Metallbauteiles 1 durch anodische Oxidation erzeugten Farbschicht 2.The transparent varnish 3, with which the surface of the metal component (1) is coated between 75% and 98%, makes it possible to show through the
Die Rauheitskennzahl der Oberfläche des Metallbauteils 1 kann etwa N7 betragen, mit einem arithmetischen Mittelrauwert Ra von 1,6 und eine Rautiefe von etwa 10 µm aufweisen. Die Rauheitskennzahlen können jedoch auch um +/- 1 abweichen, mit arithmetischen Mittelrauwerten von 0,8 bei N6 und 3,2 bei N8 als Rauheitskennzahlen und mit entsprechenden Rautiefen von 4 - 6,3 µm oder 16 - 25 µm.The roughness index of the surface of the metal component 1 may be approximately N7, with an arithmetic mean roughness Ra of 1.6 and a surface roughness of approximately 10 μm. The roughness indices may, however, also deviate by +/- 1, with arithmetic mean roughness values of 0.8 at N6 and 3.2 at N8 as roughness indices and with corresponding roughness depths of 4-6.3 μm or 16-25 μm.
Dieses Färbeverfahren für Titan, führt mit seiner gesteuerten anodischen Oxidation und der elektrophoretischen Abscheidung zu einer extrem widerstandsfähigen Oberfläche mit einer großen Farbenvielfalt, wobei die Farben durch eine definiert erzeugte Oxidschicht erzeugt werden und die widerstandsfähige Oberflächen durch die partielle Oberflächenversiegelung mit Schutzlack. Eine Erweiterung der Farbpallette ist durch Tauchfärben mit farbigem Lack 3 möglich.This dyeing process for titanium, with its controlled anodic oxidation and electrophoretic deposition, results in an extremely durable surface with a great variety of colors, the colors being produced by a defined oxide layer and the resistive surfaces by the partial surface sealing with protective lacquer. An extension of the color pallet is possible by dip dyeing with colored paint 3.
Claims (8)
- Method for producing a scratch-tolerant and dirt-tolerant surface of a metal component made from titanium or a titanium alloy, wherein in a first method step, the metal component (1) is cleaned in a pickling agent for complete removal of an oxide layer, in a second method step, the metal component (1) is provided with a coloured layer for colouring by anodic oxidation, in a third method step, the metal component (1) is coated with a transparent lacquer (3) which extends from a profile base (4) to below the exposed profile tips (5) of the roughness for partial coating with a layer thickness which is less than the roughness of the surface of the metal component (1) is high in a cathodic dip-coating method and is carried out until at least 75 % to at most 98 % of the surface is coated with lacquer (3) with a lacquer layer being built up from the profile base (4) to the outside and in a fourth method step for baking the lacquer (3), the metal component (1) is heated in a drying oven.
- Method according to Claim 1, characterised in that baking of the lacquer (3) is effected for 10 - 30 minutes at 130°C to 190°C, in particular for 20 minutes at 160°C.
- Method according to one of the afore-mentioned claims, characterised in that the metal component (1) is rinsed with a liquid in intermediate steps between two or more method steps.
- Method according to Claim 3, characterised in that in an intermediate step between the first and second method step, a rinsing process is effected using demineralised water in standing rinsing and then/or in an intermediate step between first and second method step, a rinsing process is effected using demineralised water in flow rinsing.
- Method according to one of the afore-mentioned claims, characterised in that in a method step for roughening the surface and removal of an oxide layer upstream of the first method step, the surface of the metal component (1) is blasted using a coarse-grained blasting material.
- Method according to Claim 5, characterised in that high-grade corundum or sharp-edged stainless steel is used as blasting material.
- Metal component made from titanium or a titanium alloy having scratch-tolerant and dirt-tolerant surface produced by a method according to Claim 1 and which is provided with all-over colouring by anodic oxidation, characterised in that the surface provided with the colouring is provided by cathodic dip coating with a partial lacquer layer made from a transparent lacquer (3) which extends from the profile base (4) of a roughness profile of the surface of the metal component (1) to slightly below the profile tips (5) of the roughness profile which project beyond the lacquer layer and in that 75 % - 98 % of the surface of the metal component (1) are coated with lacquer (3).
- Metal component according to claim 7, characterised in that the lacquer (3) is a coloured lacquer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014116403.2A DE102014116403A1 (en) | 2014-11-11 | 2014-11-11 | Process for producing a scratch-resistant and contamination-tolerant surface of a metal component and metal component provided therewith |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3020852A1 EP3020852A1 (en) | 2016-05-18 |
| EP3020852B1 true EP3020852B1 (en) | 2017-11-01 |
Family
ID=54783323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15003222.5A Active EP3020852B1 (en) | 2014-11-11 | 2015-11-11 | Method for producing a scratch and dirt tolerant surface of a metal component and metal component comprising same |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3020852B1 (en) |
| DE (1) | DE102014116403A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6403649A (en) * | 1961-12-26 | 1965-10-07 | ||
| GB1426423A (en) * | 1974-12-04 | 1976-02-25 | Fujisash Ind Ltd | Method of producing coloured anodic coating on aluminum and its alloys |
| DE3717652A1 (en) * | 1987-05-26 | 1988-12-08 | Hoechst Ag | ONE-STEP ELECTROCHEMICAL IMAGING METHOD FOR REPRODUCTION LAYERS |
| DE3826715A1 (en) * | 1988-08-05 | 1990-02-22 | Fraunhofer Ges Forschung | METHOD FOR COATING SUBSTRATES WITH AN INSULATING COATING |
| DE19954503A1 (en) * | 1999-11-11 | 2001-05-17 | Heiner Jenewein | Manufacturing light metal objects with decorative surfaces involves accurately cutting butt edges, welding with high energy beam, preferably using protective gas, treating weld seam surface |
| DE10127770A1 (en) * | 2001-06-07 | 2002-12-12 | Volkswagen Ag | Production of anticorrosion coating on magnesium or alloy part, used in vehicle or aircraft construction, involves oxidation in aluminum phosphate electrolyte containing vanadium, molybdenum and/or manganese compound |
| CN101293460B (en) * | 2007-04-24 | 2011-08-17 | 比亚迪股份有限公司 | Surface decoration method for light metal material |
| AU2013218068B2 (en) * | 2012-02-07 | 2017-06-01 | Chemetall Gmbh | Method for coating metallic surfaces of substrates, and objects coated according to said method |
-
2014
- 2014-11-11 DE DE102014116403.2A patent/DE102014116403A1/en not_active Withdrawn
-
2015
- 2015-11-11 EP EP15003222.5A patent/EP3020852B1/en active Active
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| Title |
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| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014116403A1 (en) | 2016-05-12 |
| EP3020852A1 (en) | 2016-05-18 |
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