WO2007031262A1 - Heat exchanger, in particular exhaust gas heat exchanger - Google Patents

Heat exchanger, in particular exhaust gas heat exchanger Download PDF

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Publication number
WO2007031262A1
WO2007031262A1 PCT/EP2006/008851 EP2006008851W WO2007031262A1 WO 2007031262 A1 WO2007031262 A1 WO 2007031262A1 EP 2006008851 W EP2006008851 W EP 2006008851W WO 2007031262 A1 WO2007031262 A1 WO 2007031262A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
coating
exhaust gas
sol
gas heat
Prior art date
Application number
PCT/EP2006/008851
Other languages
German (de)
French (fr)
Inventor
Klaus Fischle
Dieter Gross
Oliver Mamber
Matthias Pfitzer
Original Assignee
Behr Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Behr Gmbh & Co. Kg filed Critical Behr Gmbh & Co. Kg
Priority to US12/066,588 priority Critical patent/US20080245512A1/en
Priority to EP06805687A priority patent/EP1926962A1/en
Priority to JP2008530399A priority patent/JP2009508080A/en
Publication of WO2007031262A1 publication Critical patent/WO2007031262A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings

Definitions

  • Heat exchanger in particular exhaust gas heat exchanger
  • the invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, with at least one of a medium, in particular exhaust gas, acted upon surface of metal, in particular of aluminum or stainless steel, which is provided with a coating.
  • the invention also relates to a method for producing a heat exchanger described above.
  • Exhaust gas mainly from diesel engines, leads in exhaust gas heat exchangers together with moisture and temperature to corrosion attacks on the metallic materials used.
  • temperature-resistant coatings can be used.
  • the object of the invention is to provide a heat exchanger, in particular an exhaust gas heat exchanger, with at least one of a medium, in particular of exhaust gas, acted upon surface of metal, in particular of aluminum or stainless steel, which is provided with a coating, the coating better Has properties as conventional paints and the production is safe to produce.
  • the object is in a heat exchanger, in particular an exhaust gas heat exchanger, with at least one of a medium, in particular of Exhaust gas, applied surface of metal, in particular of aluminum or stainless steel, which is provided with a coating, achieved in that the coating comprises a coating material based on nanotechnology.
  • the coating material comprises at least one nanomaterial or a nanostructure.
  • the coating is vitreous and has a very good chemical resistance.
  • a preferred embodiment of the heat exchanger is characterized in that the coating comprises a main component which is composed of an organic and an inorganic portion. Via the crosslinking temperature, the properties of the coating can be defined or varied over wide limits.
  • the heat exchanger is characterized in that the coating contains silicon.
  • organo (alkoxy) silanes are selectively hydrolyzed by using suitable catalysts with elimination of alcohols.
  • the heat exchanger is characterized in that the coating contains titanium, zirconium, aluminum, magnesium, zinc and / or calcium. Due to the different substances, the inorganic network can be selectively modified.
  • the above-mentioned object is achieved in that the coating is produced in a sol-gel process.
  • a sol for the production of nanomaterials is converted into a gel.
  • Hydrolysis and condensation reactions generate a three-dimensional network of molecules stored together in a liquid.
  • thermal process steps the gels are processed into nanomaterials or nanostructures.
  • a preferred embodiment of the method is characterized in that at least one sol is deposited on the surface to be coated. is brought.
  • the surface to be coated can be wetted with the sol in any manner.
  • Another preferred embodiment of the method is characterized in that the sol is cured to form a crosslinked polymer layer.
  • the curing is preferably carried out under the influence of temperature.
  • a heat exchanger to be coated is flooded with the coating material and emptied; the emptied heat exchanger is heated in a drying oven.
  • the heat exchanger to be coated is forcibly flooded by the coating material and then emptied. Thereafter, the heat exchanger is preferably hung so that excess coating material can completely leak without forming unwanted accumulations of coating material inside the heat exchanger. Drops adhering to the outlet of the heat exchanger are removed in a suitable manner, for example by means of compressed air or with the aid of an electrostatic precipitator.
  • the invention relates to an exhaust gas heat exchanger made of aluminum or stainless steel.
  • the exhaust gas heat exchanger has a cavity which is traversed by exhaust gas during operation of the exhaust gas heat exchanger.
  • the cavity is coated with a coating material based on nanotechnology.
  • the main component of the coating material is composed of an organic and an inorganic portion.
  • Via the crosslinking temperature the properties of the coating can be defined over wide limits. At high baking temperatures, a higher proportion The organic ingredients expelled, that is, the degree of crosslinking is higher. As a result, the corrosion resistance of the layer increases. At low stoving temperatures, the proportion of organic ingredients is higher, that is, the ductility of the coating is greater.
  • An exhaust gas heat exchanger to be coated is forcibly flooded with the coating material according to one aspect of the present invention and then emptied. Thereafter, the exhaust gas heat exchanger is suspended so that excess coating material can completely leak without forming accumulations in the interior. Adhesive drops at the outlet are removed in a suitable manner, for example by compressed air or with the aid of an electrostatic droplet stripper. Subsequently, the exhaust gas heat exchanger then passes through a drying oven.
  • ORMOCER harbors a brand of the Fraunhofer Deutschen Republic for the promotion of applied research in Kunststoff.
  • organo (alkoxy) silanes are specifically hydrolyzed by using suitable catalysts for splitting off alcohols, for example methanol, ethanol, etc.
  • suitable catalysts for splitting off alcohols for example methanol, ethanol, etc.
  • Subsequent condensation reactions lead to the formation of organically modified inorganic-oxidic structures.
  • silicon can also be partially replaced by other elements, in particular titanium, zirconium or aluminum.
  • the elements magnesium, zinc and calcium can be incorporated.
  • the aqueous-alcoholic sols are applied by flooding to the heat exchanger to be coated, which is also referred to as a heat exchanger, and thermally cured. This results in a crosslinked polymer layer.
  • the aim of the coating is, in addition to the anti-corrosive and / or water-repellent property at the same time to prevent the adhesion of dirt, particles, soot and oil films.
  • This oleophobic effect when using ORMOCER layers in a proportion of 0.1 to 10%, preferably 0.5 to 5%, in particular 1 to 2%, of Fluorosilanes can be achieved in the ORMOCER layer.
  • the incorporation of a simultaneously hydrophobic and oleophobic character of the layer is achieved by adding an alkoxysilane with highly fluorinated alkyl chains. Particularly favorable effects are achieved with silanes of the type F13 (CF 3 - (CF 2 ) S -) and F16 (CF 2 H- (CF 2 H).

Abstract

The invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, having at least one surface which is impinged on by a medium, in particular exhaust gas, is made from metal, in particular aluminium or stainless steel, and is provided with a coating. In order to improve the properties of the coating, according to the invention, the coating comprises a coating material based on nanotechnology.

Description

Wärmetauscher, insbesondere Abgaswärmetauscher Heat exchanger, in particular exhaust gas heat exchanger
Die Erfindung betrifft einen Wärmetauscher, insbesondere einen Abgaswärmetauscher, mit mindestens einer von einem Medium, insbesondere von Abgas, beaufschlagten Fläche aus Metall, insbesondere aus Aluminium oder Edelstahl, die mit einer Beschichtung versehen ist. Die Erfindung betrifft auch ein Verfahren zur Herstellung eines vorab beschriebenen Wärmetau- schers.The invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, with at least one of a medium, in particular exhaust gas, acted upon surface of metal, in particular of aluminum or stainless steel, which is provided with a coating. The invention also relates to a method for producing a heat exchanger described above.
Abgas, vorwiegend aus Dieselmotoren, führt in Abgaswärmetauschern zusammen mit Feuchtigkeit und Temperatur zu Korrosionsangriffen auf die verwendeten metallischen Werkstoffe. Zum Schutz vor Korrosion können temperaturbeständige Lacke verwendet werden.Exhaust gas, mainly from diesel engines, leads in exhaust gas heat exchangers together with moisture and temperature to corrosion attacks on the metallic materials used. To protect against corrosion, temperature-resistant coatings can be used.
Aufgabe der Erfindung ist es, einen Wärmetauscher, insbesondere einen Abgaswärmetauscher, mit mindestens einer von einem Medium, insbesondere von Abgas, beaufschlagten Fläche aus Metall, insbesondere aus AIu- minium oder Edelstahl, die mit einer Beschichtung versehen ist, zu schaffen, dessen Beschichtung bessere Eigenschaften als herkömmliche Lacke aufweist und der fertigungssicher herstellbar ist.The object of the invention is to provide a heat exchanger, in particular an exhaust gas heat exchanger, with at least one of a medium, in particular of exhaust gas, acted upon surface of metal, in particular of aluminum or stainless steel, which is provided with a coating, the coating better Has properties as conventional paints and the production is safe to produce.
Die Aufgabe ist bei einem Wärmetauscher, insbesondere einem Abgaswär- metauscher, mit mindestens einer von einem Medium, insbesondere von Abgas, beaufschlagten Fläche aus Metall, insbesondere aus Aluminium oder Edelstahl, die mit einer Beschichtung versehen ist, dadurch gelöst, dass die Beschichtung ein Beschichtungsmaterial umfasst, das auf Nanotechnologie basiert. Vorzugsweise umfasst das Beschichtungsmaterial mindestens einen Nanowerkstoff beziehungsweise eine Nanostruktur. Die Beschichtung ist glasartig und weist eine sehr gute chemische Beständigkeit auf.The object is in a heat exchanger, in particular an exhaust gas heat exchanger, with at least one of a medium, in particular of Exhaust gas, applied surface of metal, in particular of aluminum or stainless steel, which is provided with a coating, achieved in that the coating comprises a coating material based on nanotechnology. Preferably, the coating material comprises at least one nanomaterial or a nanostructure. The coating is vitreous and has a very good chemical resistance.
Ein bevorzugtes Ausführungsbeispiel des Wärmetauschers ist dadurch gekennzeichnet, dass die Beschichtung eine Hauptkomponente umfasst, die sich aus einem organischen und einem anorganischen Anteil zusammensetzt. Über die Vernetzungstemperatur können die Eigenschaften der Beschichtung über weite Grenzen definiert beziehungsweise variiert werden.A preferred embodiment of the heat exchanger is characterized in that the coating comprises a main component which is composed of an organic and an inorganic portion. Via the crosslinking temperature, the properties of the coating can be defined or varied over wide limits.
Ein weiteres bevorzugtes Ausführungsbeispiel des Wärmetauschers ist da- durch gekennzeichnet, dass die Beschichtung Silicium enthält. Vorzugsweise werden Organo(alkoxy)silane durch Verwendung geeigneter Katalysatoren unter Abspaltung von Alkoholen gezielt hydrolysiert.Another preferred embodiment of the heat exchanger is characterized in that the coating contains silicon. Preferably, organo (alkoxy) silanes are selectively hydrolyzed by using suitable catalysts with elimination of alcohols.
Weitere bevorzugte Ausführungsbeispiele des Wärmetauschers sind da- durch gekennzeichnet, dass die Beschichtung Titan, Zirkonium, Aluminium, Magnesium, Zink und/oder Calcium enthält. Durch die verschiedenen Stoffe kann das anorganische Netzwerk gezielt modifiziert werden.Further preferred embodiments of the heat exchanger are characterized in that the coating contains titanium, zirconium, aluminum, magnesium, zinc and / or calcium. Due to the different substances, the inorganic network can be selectively modified.
Bei einem Verfahren zur Herstellung eines vorab beschriebenen Wärmetau- schers, insbesondere eines Abgaswärmetauschers, ist die oben angegebene Aufgabe dadurch gelöst, dass die Beschichtung in einem Sol-Gel-Verfahren erzeugt wird. Bei dem Sol-Gel-Verfahren wird ein SoI zur Herstellung von Nanowerkstoffen in ein Gel überführt. Durch Hydrolyse und Kondensationsreaktionen wird dabei ein dreidimensionales Netzwerk zusammen gelagerter Moleküle in einer Flüssigkeit erzeugt. Durch thermische Verfahrensschritte werden die Gele zu Nanowerkstoffen beziehungsweise Nanostrukturen weiterverarbeitet.In a method for producing a heat exchanger described above, in particular an exhaust gas heat exchanger, the above-mentioned object is achieved in that the coating is produced in a sol-gel process. In the sol-gel process, a sol for the production of nanomaterials is converted into a gel. Hydrolysis and condensation reactions generate a three-dimensional network of molecules stored together in a liquid. By thermal process steps, the gels are processed into nanomaterials or nanostructures.
Ein bevorzugtes Ausführungsbeispiel des Verfahrens ist dadurch gekenn- zeichnet, dass mindestens ein SoI auf die zu beschichtende Fläche aufge- bracht wird. Die zu beschichtende Fläche kann in beliebiger Art und Weise mit dem SoI benetzt werden.A preferred embodiment of the method is characterized in that at least one sol is deposited on the surface to be coated. is brought. The surface to be coated can be wetted with the sol in any manner.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verfahrens ist dadurch gekennzeichnet, dass das SoI ausgehärtet wird, um eine vernetzte Polymerschicht zu bilden. Das Aushärten erfolgt vorzugsweise unter Temperatureinwirkung.Another preferred embodiment of the method is characterized in that the sol is cured to form a crosslinked polymer layer. The curing is preferably carried out under the influence of temperature.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verfahrens ist durch fol- gende Verfahrensschritte gekennzeichnet: Ein zu beschichtender Wärmetauscher wird mit dem Beschichtungsmaterial geflutet und entleert; der entleerte Wärmetauscher wird in einem Trockenofen erhitzt. Der zu beschichtende Wärmetauscher wird von dem Beschichtungsstoff zwangsgeflutet und anschließend entleert. Danach wird der Wärmetauscher vorzugsweise so aufgehängt, dass überschüssiger Beschichtungsstoff vollständig auslaufen kann, ohne dass im Inneren des Wärmetauschers unerwünschte Ansammlungen von Beschichtungsstoff gebildet werden. Am Auslauf des Wärmetauschers anhaftende Tropfen werden in geeigneter Art und Weise, zum Beispiel mit Hilfe von Druckluft oder mit Hilfe eines elektrostatischen Tropfenab- ziehers, entfernt.Another preferred embodiment of the method is characterized by the following method steps: A heat exchanger to be coated is flooded with the coating material and emptied; the emptied heat exchanger is heated in a drying oven. The heat exchanger to be coated is forcibly flooded by the coating material and then emptied. Thereafter, the heat exchanger is preferably hung so that excess coating material can completely leak without forming unwanted accumulations of coating material inside the heat exchanger. Drops adhering to the outlet of the heat exchanger are removed in a suitable manner, for example by means of compressed air or with the aid of an electrostatic precipitator.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der verschiedene Ausführungsbeispiel im Einzelnen beschrieben sind. Dabei können die in den Ansprüchen und in der Beschreibung erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details of the invention will become apparent from the following description in which various embodiments are described in detail. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination.
Die Erfindung betrifft einen Abgaswärmetauscher aus Aluminium oder Edelstahl. Der Abgaswärmetauscher weist einen Hohlraum auf, der im Betrieb des Abgaswärmetauschers von Abgas durchströmt wird. Der Hohlraum ist mit einem Beschichtungsstoff beschichtet, der auf Nanotechnologie beruht. Die Hauptkomponente des Beschichtungsstoffes setzt sich aus einem organischen und einem anorganischen Anteil zusammen. Über die Vernetzungstemperatur können die Eigenschaften der Beschichtung über weite Grenzen definiert werden. Bei hohen Einbrenntemperaturen wird ein höherer Anteil der organischen Inhaltsstoffe ausgetrieben, das heißt der Vernetzungsgrad ist höher. Dadurch nimmt die Korrosionsbeständigkeit der Schicht zu. Bei niedrigen Einbrenntemperaturen ist der Anteil der organischen Inhaltsstoffe höher, das heißt die Duktilität der Beschichtung wird größer.The invention relates to an exhaust gas heat exchanger made of aluminum or stainless steel. The exhaust gas heat exchanger has a cavity which is traversed by exhaust gas during operation of the exhaust gas heat exchanger. The cavity is coated with a coating material based on nanotechnology. The main component of the coating material is composed of an organic and an inorganic portion. Via the crosslinking temperature, the properties of the coating can be defined over wide limits. At high baking temperatures, a higher proportion The organic ingredients expelled, that is, the degree of crosslinking is higher. As a result, the corrosion resistance of the layer increases. At low stoving temperatures, the proportion of organic ingredients is higher, that is, the ductility of the coating is greater.
Ein zu beschichtender Abgaswärmetauscher wird gemäß einem Aspekt der vorliegenden Erfindung mit dem Beschichtungsstoff zwangsgeflutet und anschließend entleert. Danach wird der Abgaswärmetauscher so aufgehängt, dass überschüssiger Beschichtungsstoff vollständig auslaufen kann, ohne Ansammlungen im Inneren zu bilden. Anhaftende Tropfen am Auslauf werden in geeigneter Weise, zum Beispiel durch Druckluft oder mit Hilfe eines elektrostatischen Tropfenabziehers entfernt. Anschließend durchläuft der Abgaswärmetauscher dann einen Trockenofen.An exhaust gas heat exchanger to be coated is forcibly flooded with the coating material according to one aspect of the present invention and then emptied. Thereafter, the exhaust gas heat exchanger is suspended so that excess coating material can completely leak without forming accumulations in the interior. Adhesive drops at the outlet are removed in a suitable manner, for example by compressed air or with the aid of an electrostatic droplet stripper. Subsequently, the exhaust gas heat exchanger then passes through a drying oven.
Die Schichterzeugung erfolgt dabei über einen Sol-Gel-Prozess, beispielsweise durch so genannte ORMOCER-Schichten. Hinter dem Begriff ORMO- CER verbirgt sich eine Marke der Fraunhofer Gesellschaft zur Förderung der angewandten Forschung in München. Zur Schichterzeugung werden Orga- no(alkoxy)silane durch Verwendung geeigneter Katalysatoren zur Abspal- tung von Alkoholen, zum Beispiel Methanol, Ethanol etc., gezielt hydrolisiert. Anschließende Kondensationsreaktionen führen zur Ausbildung von organisch modifizierten anorganisch-oxidischen Strukturen. Zur Modifizierung des anorganischen Netzwerks kann Silicium auch teilweise durch andere Elemente, vor allem Titan, Zirkonium oder Aluminium ersetzt werden. Des Wei- teren können die Elemente Magnesium, Zink und Calcium eingebaut werden. Die wässrig-alkoholischen Sole werden im Flutverfahren auf den zu beschichtenden Wärmetauscher, der auch als Wärmeübertrager bezeichnet wird, aufgebracht und thermisch ausgehärtet. Dabei entsteht eine vernetzte Polymerschicht.The layer formation takes place via a sol-gel process, for example by so-called ORMOCER layers. The term ORMOCER harbors a brand of the Fraunhofer Gesellschaft for the promotion of applied research in Munich. For layer formation, organo (alkoxy) silanes are specifically hydrolyzed by using suitable catalysts for splitting off alcohols, for example methanol, ethanol, etc. Subsequent condensation reactions lead to the formation of organically modified inorganic-oxidic structures. In order to modify the inorganic network, silicon can also be partially replaced by other elements, in particular titanium, zirconium or aluminum. Furthermore, the elements magnesium, zinc and calcium can be incorporated. The aqueous-alcoholic sols are applied by flooding to the heat exchanger to be coated, which is also referred to as a heat exchanger, and thermally cured. This results in a crosslinked polymer layer.
Ziel der Beschichtung ist es, neben der korrosionsschützenden und/oder wasserabweisenden Eigenschaft auch gleichzeitig das Anhaften von Schmutz, Partikeln, Ruß und Ölfilmen zu verhindern. Dieser oleophobe Effekt kann bei der Verwendung von ORMOCER-Schichten mit einem Anteil von 0,1 bis 10 %, vorzugsweise 0,5 bis 5 %, insbesondere 1 bis 2 %, der Fluorsilane in der ORMOCER-Schicht erreicht werden. Der Einbau eines gleichzeitig hydrophoben und oleophoben Charakters der Schicht wird durch Zugabe eines Alkoxysilans mit hochfluorierten Alkylketten erreicht. Besonders günstige Effekte werden dabei mit Silanen des Typs F13 (CF3-(CF2)S-) und F16 (CF2H-(CF2H erreicht. The aim of the coating is, in addition to the anti-corrosive and / or water-repellent property at the same time to prevent the adhesion of dirt, particles, soot and oil films. This oleophobic effect, when using ORMOCER layers in a proportion of 0.1 to 10%, preferably 0.5 to 5%, in particular 1 to 2%, of Fluorosilanes can be achieved in the ORMOCER layer. The incorporation of a simultaneously hydrophobic and oleophobic character of the layer is achieved by adding an alkoxysilane with highly fluorinated alkyl chains. Particularly favorable effects are achieved with silanes of the type F13 (CF 3 - (CF 2 ) S -) and F16 (CF 2 H- (CF 2 H).

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Wärmetauscher, insbesondere Abgaswärmetauscher, mit mindestens einer von einem Medium, insbesondere von Abgas, beaufschlagten Fläche aus Metall, insbesondere aus Aluminium oder Edelstahl, die mit einer Beschichtung versehen ist, dadurch gekennzeichnet, dass die Beschichtung ein Beschichtungsmaterial umfasst, das auf Nano- technologie basiert.1. Heat exchanger, in particular exhaust gas heat exchanger, with at least one of a medium, in particular of exhaust gas, acted upon surface of metal, in particular of aluminum or stainless steel, which is provided with a coating, characterized in that the coating comprises a coating material which is based on nano- technology based.
2. Wärmetauscher nach Anspruch 1 , dadurch gekennzeichnet, dass die Beschichtung eine Hauptkomponente umfasst, die sich aus einem organischen und einem anorganischen Anteil zusammensetzt.2. Heat exchanger according to claim 1, characterized in that the coating comprises a main component which is composed of an organic and an inorganic portion.
3. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung Silicium enthält.3. Heat exchanger according to one of the preceding claims, characterized in that the coating contains silicon.
4. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung Titan, Zirkonium und/oder A- luminium enthält.4. Heat exchanger according to one of the preceding claims, characterized in that the coating contains titanium, zirconium and / or aluminum.
5. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung Magnesium, Zink und/oder Calcium enthält.5. Heat exchanger according to one of the preceding claims, characterized in that the coating contains magnesium, zinc and / or calcium.
6. Verfahren zur Herstellung eines Wärmetauschers, insbesondere eines Abgaswärmetauschers, nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung in einem SoI- Gel-Verfahren erzeugt wird. 6. A process for producing a heat exchanger, in particular an exhaust gas heat exchanger, according to one of the preceding claims, characterized in that the coating is produced in a sol-gel process.
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass mindestens ein SoI auf die zu beschichtende Fläche aufgebracht wird.7. The method according to claim 6, characterized in that at least one SoI is applied to the surface to be coated.
8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass das SoI ausgehärtet wird, um eine vernetzte Polymerschicht zu bilden.8. The method according to claim 7, characterized in that the sol is cured to form a crosslinked polymer layer.
9. Verfahren nach einem der Ansprüche 6 bis 8, gekennzeichnet durch folgende Verfahrensschritte:9. The method according to any one of claims 6 to 8, characterized by the following method steps:
a) ein zu beschichtender Wärmetauscher wird mit dem Beschich- tungsmaterial geflutet und entleert; b) der entleerte Wärmetauscher wird in einem Trockenofen erhitzt und/oder mit einem heißen Gas, insbesondere Heißluft, durchströmt. a) a heat exchanger to be coated is flooded with the coating material and emptied; b) the emptied heat exchanger is heated in a drying oven and / or with a hot gas, in particular hot air, flows through.
PCT/EP2006/008851 2005-09-14 2006-09-12 Heat exchanger, in particular exhaust gas heat exchanger WO2007031262A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/066,588 US20080245512A1 (en) 2005-09-14 2006-09-12 Heat Exchanger, In Particular Exhaust Gas Heat Exchanger
EP06805687A EP1926962A1 (en) 2005-09-14 2006-09-12 Heat exchanger, in particular exhaust gas heat exchanger
JP2008530399A JP2009508080A (en) 2005-09-14 2006-09-12 Heat exchangers, especially exhaust heat exchangers

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DE102005043730.3 2005-09-14
DE102005043730A DE102005043730A1 (en) 2005-09-14 2005-09-14 Heat exchanger, in particular exhaust gas heat exchanger

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EP (1) EP1926962A1 (en)
JP (1) JP2009508080A (en)
CN (1) CN101305255A (en)
DE (1) DE102005043730A1 (en)
RU (1) RU2430323C2 (en)
WO (1) WO2007031262A1 (en)

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DE102008033222A1 (en) 2008-07-15 2010-01-21 Behr Gmbh & Co. Kg Producing a part of a heat exchanger comprising aluminum and/or aluminum alloy and having a corrosion protected surface, comprises applying zinc or zinc-containing layer to the surface or part of the surface
DE102008062705A1 (en) 2008-12-18 2010-06-24 Behr Gmbh & Co. Kg Coating method and coating apparatus for manufacturing a component and heat exchangers and use of the heat exchanger
JP5218525B2 (en) * 2010-11-09 2013-06-26 株式会社デンソー Equipment through which heat transport fluid flows
JP5934569B2 (en) * 2012-04-27 2016-06-15 日立Ｇｅニュークリア・エナジー株式会社 Heat exchanger with protective member
DE102013215386A1 (en) * 2013-08-05 2015-02-05 Behr Gmbh & Co. Kg Heat exchanger made of aluminum and method for producing a surface coating on a heat exchanger made of aluminum

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DE102005043730A1 (en) 2007-03-22
CN101305255A (en) 2008-11-12
JP2009508080A (en) 2009-02-26
EP1926962A1 (en) 2008-06-04
US20080245512A1 (en) 2008-10-09
RU2430323C2 (en) 2011-09-27
RU2008114316A (en) 2009-10-20

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