DE102008033222A1 - 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 - Google Patents
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 Download PDFInfo
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- DE102008033222A1 DE102008033222A1 DE200810033222 DE102008033222A DE102008033222A1 DE 102008033222 A1 DE102008033222 A1 DE 102008033222A1 DE 200810033222 DE200810033222 DE 200810033222 DE 102008033222 A DE102008033222 A DE 102008033222A DE 102008033222 A1 DE102008033222 A1 DE 102008033222A1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0012—Brazing heat exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/06—Compressing powdered coating material, e.g. by milling
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
- C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
-
- 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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
- F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
- B05D2601/28—Metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/04—Fastening; Joining by brazing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Wärmeübertragers nach dem Oberbegriff des Patentanspruches 1 sowie einen Wärmeübertrager, herstellbar nach dem Verfahren, gemäß Oberbegriff des Patentanspruches 9.The The invention relates to a method for producing a heat exchanger according to the preamble of claim 1 and a heat exchanger, Can be produced by the method, according to the preamble of claim 9.
Wärmeübertrager,
insbesondere Wärmeübertrager für Kraftfahrzeuge,
z. B. Kühlmittelkühler, Kältemittelkondensatoren
oder Ladeluftkühler unterliegen während des Betriebes
aufgrund der Umweltbedingungen der Korrosion. Dies gilt insbesondere für
den aus Rohren und Rippen aufgebauten Block des Wärmeübertragers,
welcher von Umgebungsluft beaufschlagt wird. Feuchtigkeit, Nässe,
wechselnde Temperaturen, Streusalz auf den Straßen sind
die wesentlichen Faktoren des Korrosionsangriffes. Heutige Kraftfahrzeugwärmeübertrager
werden vielfach aus Aluminium oder Aluminiumlegierungen hergestellt,
die ebenfalls korrosionsanfällig sind. Bekannte Wärmeübertrager
in Kraftfahrzeugen sind entweder mechanisch gefügt, d.
h. ihre einzelnen Teile werden mechanisch miteinander verbunden,
oder es handelt sich um gelötete Wärmeübertrager,
deren Teile, insbesondere der Wärmeübertragerblock
gelötet werden. Es sind bereits verschiedene Verfahren
bekannt, um die Wärmeübertrager vor Korrosion
zu schützen. Beispielsweise wurden Wärmeübertrager durch
Chromatieren, so genanntes Gelb-Chromatieren mit einer korrosionsschützenden,
Chrom enthaltenden Beschichtung versehen. Ein derartiges Chromatier-Verfahren
wird in der
Durch
die
Die Aufgabe der Erfindung besteht darin, ein Verfahren der eingangs genannten Art, d. h. zum Korrosionsschutz von Wärmeübertragern zu verbessern und insbesondere kostengünstig zu gestalten. Es ist auch Aufgabe der Erfindung, einen korrosionsbeständigen, kostengünstig herstellbaren Wärmeübertrager zu schaffen.The The object of the invention is a method of the initially mentioned type, d. H. for corrosion protection of heat exchangers to improve and in particular cost-effective. It is also an object of the invention to provide a corrosion resistant, inexpensive to produce heat exchanger to accomplish.
Die Aufgabe der Erfindung wird durch die Merkmale des Patentanspruches 1 gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.The The object of the invention is characterized by the features of claim 1 solved. Advantageous embodiments emerge the dependent claims.
Nach dem erfindungsgemäßen Verfahren ist vorgesehen, dass die Oberfläche oder zumindest Teile der Oberfläche mit einer Zinkschicht oder einer zinkhaltigen Schicht versehen werden. Mit dem auch im Folgenden verwendeten Begriff Zink soll nicht nur Reinzink verstanden werden, sondern auch Zinklegierungen. Unter einer zinkhaltigen Schicht soll eine auf die Oberfläche aufzubringende Schicht verstanden werden, welche eine Träger- oder Füllsubstanz umfasst, welche das Zink aufnimmt. Die Zinkschicht oder auch die zinkhaltige Schicht bieten einen hervorragenden Korrosionsschutz gegen korrosive Umwelteinflüsse, denen der Wärmeübertrager, insbesondere bei seiner Verwendung als Kraftfahrzeugwärmeübertrager ausgesetzt ist. Darüber hinaus kann die Zink- oder zinkhaltige Schicht auch – wie die folgenden bevorzugten Ausführungsformen zeigen – kostengünstig auf der Oberfläche des Wärmeübertragers deponiert werden.To the method according to the invention is provided that the surface or at least parts of the surface be provided with a zinc layer or a zinc-containing layer. The term zinc, which is also used below, should not only be pure zinc understood, but also zinc alloys. Under a zinciferous Layer should be applied to the surface layer be understood, which comprises a carrier or filling substance, which absorbs the zinc. The zinc layer or the zinc-containing Layer provide excellent corrosion protection against corrosive Environmental influences to which the heat exchanger, in particular when used as a motor vehicle heat exchanger is exposed. In addition, the zinc or zinc containing Layer also - like the following preferred embodiments show - cost-effective on the surface of the heat exchanger are deposited.
Nach einer bevorzugten Ausführungsform wird die Zinkschicht auf das für die Herstellung des Wärmeübertragers verwendete Halbzeugmaterial, insbesondere Bänder und/oder Bleche aufgebracht, d. h. vor der Fertigstellung des Wärmeübertragers. Rohre und Rippen eines Wärmeübertragers werden bevorzugt in einem kontinuierlichen Prozess aus einem Bandmaterial, welches von einem Coil abgewickelt wird, hergestellt. Dieses Metallband, vorzugsweise ein Aluminiumband, wird mit einer Zinkschicht versehen, die aufgewalzt werden kann. Die Zinkschicht bleibt bei der Weiterverarbeitung, insbesondere beim mechanischen Fügen des Wärmeübertragers erhalten und schützt somit auch den fertigen Wärmeübertrager. Vorteilhaft bei diesem Verfahren ist, dass die Korrosionsschutzschicht kostengünstig aufgebracht werden kann.To In a preferred embodiment, the zinc layer on that for the production of the heat exchanger used semi-finished material, in particular tapes and / or Sheets applied, d. H. before the completion of the heat exchanger. Tube and fins of a heat exchanger are preferred in a continuous process of a strip material, which unwound from a coil. This metal band, preferably an aluminum strip, is provided with a zinc layer, which can be rolled up. The zinc layer remains during further processing, especially during mechanical joining of the heat exchanger thus preserves and protects the finished heat exchanger. An advantage of this method is that the corrosion protection layer can be applied inexpensively.
Nach einer weiteren bevorzugten Ausführungsform erfolgt die Fertigstellung des Wärmeübertragers durch anschließendes mechanisches Fügen, d. h. beispielsweise werden Rohre und Rippen durch einen mechanischen Presssitz infolge Aufweitung der Rohre miteinander verbunden. Da beim mechanischen Fügen keine Erwärmung (wie beim Löten) stattfindet, wird die Zinkschicht auf dem Halbzeugmaterial bzw. den Rohren und Rippen nicht aufgeschmolzen.To Another preferred embodiment is the Completion of the heat exchanger by subsequent mechanical joining, d. H. For example, pipes and Ripping by a mechanical interference fit due to expansion of the Tubes connected together. Because mechanical joining no heating takes place (as in soldering), is the zinc layer on the semi-finished material or the pipes and Ribs not melted.
Nach einem weiteren bevorzugten Ausführungsbeispiel werden der gesamte Wärmeübertrager (Ganzmetallwärmeübertrager) oder der Block zunächst in einem Lötofen gelötet und anschließend mit der Zink- oder zinkhaltigen Schicht versehen. Da die Zinkschicht durch den Lötprozess aufgeschmolzen würde, erfolgt die Beschichtung nach dem Lötprozess.According to a further preferred embodiment, the entire heat exchanger (all-metal heat exchanger) or the block are first soldered in a soldering oven and then provided with the zinc or zinc-containing layer. Because the zinc layer is melted by the soldering process If, the coating takes place after the soldering process.
Nach einer weiteren bevorzugten Ausführungsform wird die Zinkschicht unmittelbar anschließend an den Lötprozess, d. h. in der Abkühlphase des Wärmeübertragers aufgebracht. In dieser Abkühlphase hat der Wärmeübertrager aufgrund seiner Erwärmung auf Löttemperatur und seiner Masse eine erhebliche Wärmemenge, so genannte Restwärme, gespeichert, die bei der anschließenden Beschichtung mit Zink für das Aufschmelzen von Zink genutzt werden kann. Dadurch kann Energie während des Herstellungsprozesses des Wärmeübertragers eingespart werden. Darüber hinaus weist der Wärmeübertrager unmittelbar nach dem Löten eine saubere Oberfläche auf, auf welcher die Zinkschicht sehr gut haftet und somit einen dauerhaften Korrosionsschutz bietet.To In another preferred embodiment, the zinc layer immediately after the soldering process, d. H. in the cooling phase of the heat exchanger applied. In this cooling phase, the heat exchanger due to its heating up to soldering temperature and its mass stored a considerable amount of heat, so-called residual heat, in the subsequent coating with zinc for the melting of zinc can be used. This can be energy during the manufacturing process of the heat exchanger be saved. In addition, the heat exchanger points a clean surface immediately after soldering on which the zinc layer adheres very well and thus one provides permanent corrosion protection.
Bevorzugt erfolgt die erfindungsgemäße Beschichtung in einem Temperaturbereich, dessen Obergrenze unterhalb der Löttemperatur und unterhalb der Schmelztemperatur des Wärmeübertragerwerkstoffes und oberhalb der Schmelztemperatur des Beschichtungswerkstoffes Zink (419° Celsius) liegt. Die Löttemperatur liegt – je nach Art der Aluminiumlegierung – etwa zwischen 520°C und 700°C. Durch die angegebene Temperaturdifferenz ist sichergestellt, dass das Zink (Siedepunkt: 907°C) nicht verdampft. Dies ergibt einen besseren Korrosionsschutz und eine geringere Umweltbelastung.Prefers the coating according to the invention takes place in one Temperature range whose upper limit below the soldering temperature and below the melting temperature of the heat exchanger material and above the melting temperature of the coating material Zinc (419 ° C) is located. The soldering temperature is - ever by type of aluminum alloy - approximately between 520 ° C and 700 ° C. Due to the specified temperature difference is ensure that the zinc (boiling point: 907 ° C) does not evaporate. This results in a better corrosion protection and a lower environmental impact.
Nach einer weiteren bevorzugten Ausführungsform wird der Beschichtungswerkstoff Zink in Form von Zinkpulver oder -staub auf die Oberfläche des Wärmeübertragers aufgebracht, wobei aufgrund der Restwärme des Wärmeübertragers das Zinkpulver schmilzt und sich somit gleichmäßig auf der Oberfläche des Wärmeübertragers verteilt. Man spart somit die Energiezufuhr für die Schmelzwärme.To Another preferred embodiment is the coating material Zinc in the form of zinc powder or dust on the surface of the Heat exchanger applied, due to the Residual heat of the heat exchanger the zinc powder melts and thus evenly on the surface of the heat exchanger distributed. You save thus the energy supply for the heat of fusion.
Nach einem weiteren bevorzugten Verfahrensbeispiel wird die zinkhaltige Schicht in Form eines Lackes auf Zinkbasis auf die Oberfläche des Wärmeübertragers aufgebracht, und zwar bevorzugt nach dem Lötprozess. Es besteht dabei die Möglichkeit, nur einzelne besonders gefährdete Bereiche oder den gesamten Wärmeübertrager zu lackieren, was durch Aufsprühen oder ein Tampon-Verfahren erfolgen kann.To Another preferred method example is the zinc-containing Layer in the form of a zinc-based paint on the surface the heat exchanger applied, preferably after the soldering process. There is the possibility only a few particularly endangered areas or the whole Heat exchanger to paint, which by spraying or a tampon process can be done.
Die Aufgabe der Erfindung wird auch bei einem Wärmeübertrager, der nach dem erfindungsgemäßen Verfahren herstellbar ist, gelöst, und zwar durch die Merkmale des Patentanspruches 9. Der bevorzugte Wärmeübertrager wird insbesondere in Kraftfahrzeugen eingesetzt und kann beispielsweise als Kühlmittelkühler, Ladeluftkühler, Kältemittelkondensator oder Ölkühler aus gebildet sein. Der Wärmeübertrager weist einen aus Rohren und Rippen aufgebauten Block auf, wobei die Rohre von einem ersten Medium, z. B. einem Kühlmittel oder einem Kältemittel durchströmt und die Rippen von Umgebungsluft beaufschlagt werden. Darüber hinaus weist der Wärmeübertrager Sammelbehälter in Form von Sammelkästen oder Sammelrohren auf, welche mit den Rohren kommunizieren. Der Wärmeübertrager weist somit eine innere, von dem ersten Medium benetzte Oberfläche und eine äußere, von dem zweiten Medium, d. h. Luft beaufschlagte Oberfläche auf. Die Zinkschicht ist vorzugsweise auf der äußeren Oberfläche angeordnet und bietet somit einen Korrosionsschutz gegen Umwelteinflüsse und Witterungsbedingungen, wie sie insbesondere beim Betrieb eines Kraftfahrzeuges auftreten. Die Zinkschicht kann allerdings auch auf der inneren Oberfläche des Wärmeübertragers angeordnet sein, um eine Korrosion durch das erste Wärmeübertragermedium zu vermeiden. Schließlich kann die Zinkschicht sowohl auf der inneren als auch auf der äußeren Oberfläche angebracht sein. Wie in den oben erwähnten Verfahrensvarianten beschrieben, kann die Zinkschicht sowohl auf mechanisch gefügten als auch auf gelöteten Wärmeübertragern vorgesehen sein. Das erfindungsgemäße Verfahren kann auch als Reparaturverfahren, z. B. bei undichten Lötstellen angewandt werden.The The object of the invention is also with a heat exchanger, which can be produced by the process according to the invention is solved by the features of claim 9. The preferred heat exchanger is in particular used in motor vehicles and can be used, for example, as a coolant radiator, Intercooler, refrigerant condenser or oil cooler be formed from. The heat exchanger has a built from pipes and ribs block, the tubes of a first medium, e.g. As a coolant or a refrigerant flows through and the ribs acted upon by ambient air become. In addition, the heat exchanger points Collecting containers in the form of collecting tanks or collecting pipes on, which communicate with the pipes. The heat exchanger points thus an inner, wetted by the first medium surface and an outer, second medium, d. H. Air impinged on surface. The zinc layer is preferably on the outer surface arranged and thus offers a corrosion protection against environmental influences and weather conditions, such as in particular when operating a motor vehicle occur. The zinc layer can, however, also on the inner Surface of the heat exchanger arranged be to corrosion by the first heat transfer medium to avoid. Finally, the zinc layer can be on both the inner as well as the outer surface to be appropriate. As in the above-mentioned process variants described, the zinc layer can be applied both mechanically as well as on soldered heat exchangers be provided. The inventive method can also be used as a repair method, z. B. leaking solder joints be applied.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben. Es zeigenOne Embodiment of the invention is in the drawing and will be described in more detail below. It demonstrate
Das
Verfahren läuft wie folgt ab:
In der Station I wird
der Wärmeübertrager
In station I, the heat exchanger
Es ist auch möglich, das erfindungsgemäße Verfahren zur Aufbringung einer Zinkschicht als zusätzlichen, separaten Arbeitsgang durchzuführen.It is also possible, the inventive method for applying a zinc layer as additional, separate To carry out operation.
Das erfindungsgemäße Verfahren kann auch bei Wärmeübertragern mit unterschiedlichen Werkstoffen angewandt werden, z. B. bei Wärmeübertragern, deren Rohre aus Edelstahl und deren Rippen aus Aluminium bestehen.The The inventive method can also heat exchangers be applied with different materials, for. B. in heat exchangers, their tubes are made of stainless steel and their ribs are made of aluminum.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - US 4830101 A [0002] - US 4830101 A [0002]
- - EP 1089369 A2 [0002] EP 1089369 A2 [0002]
- - DE 102005043730 A1 [0003] DE 102005043730 A1 [0003]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE200810033222 DE102008033222A1 (en) | 2008-07-15 | 2008-07-15 | 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 |
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DE200810033222 DE102008033222A1 (en) | 2008-07-15 | 2008-07-15 | 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 |
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Cited By (3)
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---|---|---|---|---|
WO2015185610A1 (en) * | 2014-06-06 | 2015-12-10 | Valeo Systemes Thermiques | Sacrificial coating for a motor vehicle heat exchanger |
WO2017108888A1 (en) * | 2015-12-23 | 2017-06-29 | Basf Se | Heat exchanger for heating gas and use of the heat exchanger |
US10633745B2 (en) | 2016-09-20 | 2020-04-28 | Hanon Systems | Corrosion protection of sealing gap between aluminum alloy and gasket |
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