NL9101073A - COPPER HEAT EXCHANGER FOR WALL BOILERS. - Google Patents
COPPER HEAT EXCHANGER FOR WALL BOILERS. Download PDFInfo
- Publication number
- NL9101073A NL9101073A NL9101073A NL9101073A NL9101073A NL 9101073 A NL9101073 A NL 9101073A NL 9101073 A NL9101073 A NL 9101073A NL 9101073 A NL9101073 A NL 9101073A NL 9101073 A NL9101073 A NL 9101073A
- Authority
- NL
- Netherlands
- Prior art keywords
- heat exchanger
- coating
- wall
- minutes
- seconds
- Prior art date
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 13
- 229910052802 copper Inorganic materials 0.000 title claims description 13
- 239000010949 copper Substances 0.000 title claims description 13
- 238000000576 coating method Methods 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 24
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 230000000379 polymerizing effect Effects 0.000 claims description 5
- 239000011253 protective coating Substances 0.000 claims description 5
- 229920002050 silicone resin Polymers 0.000 claims description 5
- 238000007605 air drying Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000012895 dilution Substances 0.000 claims description 3
- 238000010790 dilution Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004447 silicone coating Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- 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
-
- 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
- F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
-
- 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
- F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
-
- 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
- F28F21/089—Coatings, claddings or bonding layers made from metals or metal alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
UITTREKSELEXTRACT
Een koperen warmtewisselaar voor wandketels wordt beschermd door een deklaag van siliconen hars, dat als pigment een mengsel van ijzeroxyde en grafiet bevat. Een werkwijze voor het op de koperen warmtewisselaar van wandketels aanbrengen van de beschermende deklaag omvat de volgende stappen: het aanpassen van de viscositeit van het deklaagmateri-aal door passende verdunning met een oplosmiddel, het in een op passende wijze in beweging gebracht bad van deklaagmateri-aal met de genoemde viscositeit houden van de te beschermen warmtewisselaar, het in lucht laten drogen van de op de warmtewisselaar aangebrachte deklaag, en tenslotte het polymeriseren van de deklaag in een oven.A copper wall-mounted heat exchanger is protected by a silicone resin coating, which contains as a pigment a mixture of iron oxide and graphite. A method of applying the protective coating to the copper heat exchanger of wall-mounted boilers comprises the following steps: adjusting the viscosity of the coating material by appropriate dilution with a solvent, the bath of coating material suitably agitated. Keeping the heat exchanger to be protected with the said viscosity, drying the coating applied to the heat exchanger in air, and finally polymerizing the coating in an oven.
Korte aanduiding: Koperen warmtewisselaar voor wandketels.Short designation: Copper heat exchanger for wall mounted boilers.
De uitvinding heeft betrekking op een nieuwe koperen warmtewisselaar voor wandketels, die op een doeltreffende wijze is beschermd tegen corrosie tengevolge van zuur condensaat en hoge temperaturen, om de warmtewisselaar zo een hoog rendement en een langere levensduur te geven.The invention relates to a new copper wall boiler heat exchanger, which is effectively protected against corrosion due to acid condensate and high temperatures, in order to give the heat exchanger a high efficiency and a longer service life.
De uitvinding heeft eveneens betrekking op een bijzondere werkwijze voor het aanbrengen van de noodzakelijke deklaag op de te beschermen warmtewisselaar. Deklagen om de warmtewisselaar van wandketels te beschermen zijn al in de techniek bekend en bestaan in het algemeen uit siliconen harsen, die zijn gepigmenteerd met aluminium.The invention also relates to a special method for applying the necessary coating to the heat exchanger to be protected. Coatings to protect the heat exchanger of wall-mounted boilers are already known in the art and generally consist of silicone resins pigmented with aluminum.
Deze bekende aluminium - siliconen deklagen geven een doeltreffende bescherming tegen hoge temperaturen, maar hebben het nadeel dat ze niet in gelijke mate doeltreffend zijn tegen condensaat vanwege de chemische aard van het aluminium pigment, waarvan bekend is dat het gemakkelijk aangetast wordt door zure oplossingen en dus degradeert met als gevolg een verlies van de barrière werking tegen corrosie van het onderliggende koper.These known aluminum-silicone coatings provide effective protection against high temperatures, but have the disadvantage that they are not equally effective against condensate due to the chemical nature of the aluminum pigment, which is known to be easily attacked by acidic solutions and thus degrades resulting in a loss of corrosion barrier effect of the underlying copper.
Nogmaals, de huidige trend naar wandketels met hoog rendement vergroot het probleem van corrosie van het koper van de warmtewisselaar door zuur condensaat, zodat het genoemde gebrek van bekende deklagen wordt benadrukt.Again, the current trend towards high efficiency wall-mounted boilers increases the problem of corrosion of the copper of the heat exchanger by acid condensate, thus highlighting the said lack of known coatings.
Het doel van de onderhavige uitvinding is genoemd nadeel te overwinnen door het verschaffen van een deklaag voor de koperen warmtewisselaar van wandketels, die naast dat zij bestand zijn tegen de hoge temperaturen, die in moderne wandketels heersen, een doeltreffende, in hoge mate anti-corrosieve barrière vormt, die beschermt tegen het zure condensaat, dat vooral in overvloed aanwezig is in wandketels met hoog rendement.The object of the present invention is to overcome said drawback by providing a coating for the copper heat exchanger of wall-mounted boilers, which, in addition to being resistant to the high temperatures prevailing in modern wall-mounted boilers, is an effective, highly anti-corrosive barrier, which protects against the acid condensate, which is especially abundant in wall-mounted boilers with high efficiency.
Dit wordt in hoofdzaak bereikt door het aluminium pigment te vervangen door andere beschermende pigmenten, die ongevoelig zijn voor de agressieve werking van zure condensaten, zoals een mengsel van ijzeroxyde en grafiet, dat naast genoemde voordelen de deklaag en dus de warmtewisselaar een zwarte kleuring geeft, die warmte-overdracht vergroot en begunstigt.This is mainly achieved by replacing the aluminum pigment with other protective pigments, which are insensitive to the aggressive action of acidic condensates, such as a mixture of iron oxide and graphite, which in addition to the above advantages gives the coating and thus the heat exchanger a black color, which increases and favors heat transfer.
Dus de beschermingsdeklaag voor de koperen warmtewisselaar van wandketels, waarbij de deklaag uit een siliconen hars bestaat, wordt gekenmerkt doordat deze als pigment een mengsel van ijzeroxyde en grafiet bevat.Thus the protective coating for the copper heat exchanger of wall-mounted boilers, where the coating consists of a silicone resin, is characterized in that it contains as a pigment a mixture of iron oxide and graphite.
Experimenteel is gevonden dat, vanwege de ingewikkelde geometrie van de warmtewisselaar, de doeltreffendheid van een dergelijke beschermende deklaag strikt afhankelijk is van een onderdompelingsproces met nauwkeurig gedefinieerde procesparameters .It has been found experimentally that, due to the complicated geometry of the heat exchanger, the effectiveness of such a protective coating is strictly dependent on an immersion process with precisely defined process parameters.
Meer in het bijzonder wordt de werkwijze voor het aanbrengen van de deklaag op de koperen warmtewisselaar van wandketels, door middel van onderdompelen, gekenmerkt door de volgende stappen: het aanpassen van de viscositeit volgens Ford kom No. 4 van het deklaagmateriaal door passende verdunning met een oplosmiddel tot in een gebied van 40-55 seconden; het in een op passende wijze in beweging gebracht bad van deklaagmateriaal met de genoemde viscositeit houden van de te beschermen warmtewisselaar gedurende 20 tot 30 seconden; het in lucht laten drogen van de op de warmtewisselaar aangebrachte deklaag gedurende niet minder dan 30 minuten; en tenslotte het polymeriseren van de deklaag in een oven op 100-190 °C gedurende niet minder dan 30 minuten.More specifically, the method of coating the copper wall-mounted heat exchanger by immersion is characterized by the following steps: adjusting the viscosity according to Ford bowl No. 4 of the coating material by appropriate solvent dilution to a range of 40-55 seconds; holding the heat exchanger to be protected in an appropriately agitated coating material bath of said viscosity for 20 to 30 seconds; air-drying the coating applied to the heat exchanger for not less than 30 minutes; and finally polymerizing the coating in an oven at 100-190 ° C for not less than 30 minutes.
Uitzonderlijk goede experimentele resultaten in termen van een op doeltreffende wijze beschermde warmtewisselaar met een lange levensduur, werden verkregen door het gedurende 20 seconden onderdompelen van de warmtewisselaar in een bad met siliconenhars met daaraan toegevoegd ijzeroxyde en grafiet met een viscositeit van 42 seconden volgens Ford kom No. 4, vervolgens het in lucht te drogen van de aangebrachte warmte-wisselaar-deklaag gedurende 30 minuten en tenslotte het polymeriseren van de deklaag in een oven gedurende 30 minuten bij 165 °C.Exceptionally good experimental results in terms of an effectively protected long-life heat exchanger were obtained by immersing the heat exchanger in a silicone resin bath with added iron oxide and graphite with a 42 second viscosity according to Ford bowl No for 20 seconds. . 4, then air drying the applied heat exchanger coating for 30 minutes and finally polymerizing the coating in an oven for 30 minutes at 165 ° C.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2073990 | 1990-06-22 | ||
| IT02073990A IT1248980B (en) | 1990-06-22 | 1990-06-22 | PERFECTED COPPER HEAT EXCHANGER FOR WALL BOILERS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NL9101073A true NL9101073A (en) | 1992-01-16 |
| NL193471B NL193471B (en) | 1999-07-01 |
| NL193471C NL193471C (en) | 1999-11-02 |
Family
ID=11171333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL9101073A NL193471C (en) | 1990-06-22 | 1991-06-21 | Method of applying a protective coating on a copper heat exchanger. |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE1005573A3 (en) |
| CH (1) | CH682258A5 (en) |
| DE (1) | DE4120563A1 (en) |
| ES (1) | ES2048032B1 (en) |
| FR (1) | FR2663725B1 (en) |
| GB (1) | GB2245276B (en) |
| IT (1) | IT1248980B (en) |
| NL (1) | NL193471C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300543C (en) * | 2003-10-22 | 2007-02-14 | 北京化工大学 | Method for corrosion resistant protection of condensed water system |
| DE102006054723A1 (en) * | 2006-11-21 | 2008-05-29 | Behr Gmbh & Co. Kg | Heat exchanger, in particular exhaust gas heat exchanger |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3380836A (en) * | 1965-08-13 | 1968-04-30 | Interchem Corp | Corrosion inhibiting pigment |
| ES364354A1 (en) * | 1968-03-05 | 1970-12-16 | Hutter Kg S | Treatment of metal surfaces |
| DK132333C (en) * | 1973-01-09 | 1976-04-26 | J Hardenfelt | FILLER OR COATING MIXTURE WITH METAL LOOKING EFFECT |
| JPS5690853A (en) * | 1979-12-25 | 1981-07-23 | Toray Silicone Co Ltd | Silicone rubber composition |
| NL8204731A (en) * | 1982-12-07 | 1984-07-02 | Pyrotec Nv | INSTALLATION FOR THERMAL CRACKING OF A HYDROCARBON OUTPUT MATERIAL TO OLEGINS, TUBE HEAT EXCHANGER USED IN SUCH INSTALLATION AND METHOD FOR MANUFACTURING A TUBE HEAT EXCHANGER. |
| JPS60171349A (en) * | 1984-02-16 | 1985-09-04 | Matsushita Electric Ind Co Ltd | Heat exchanger |
| US4582727A (en) * | 1984-03-20 | 1986-04-15 | Amax Inc. | Varnish-bonded, carbon-coated metal products |
| DK559887A (en) * | 1986-11-28 | 1988-05-29 | Hoffmann La Roche | PROCEDURE FOR THE PREPARATION OF CARBINOOL DERIVATIVES |
| JPH024195A (en) * | 1988-06-20 | 1990-01-09 | Furukawa Electric Co Ltd:The | Copper or copper alloy u-tube coated with inner surface anti-corrosion coating film for heat exchanger |
-
1990
- 1990-06-22 IT IT02073990A patent/IT1248980B/en active IP Right Grant
-
1991
- 1991-06-17 GB GB9113025A patent/GB2245276B/en not_active Expired - Fee Related
- 1991-06-17 CH CH1793/91A patent/CH682258A5/it not_active IP Right Cessation
- 1991-06-19 BE BE9100591A patent/BE1005573A3/en not_active IP Right Cessation
- 1991-06-20 FR FR919107590A patent/FR2663725B1/en not_active Expired - Fee Related
- 1991-06-20 ES ES09101666A patent/ES2048032B1/en not_active Expired - Lifetime
- 1991-06-21 DE DE4120563A patent/DE4120563A1/en active Granted
- 1991-06-21 NL NL9101073A patent/NL193471C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BE1005573A3 (en) | 1993-11-09 |
| FR2663725B1 (en) | 1994-03-04 |
| DE4120563C2 (en) | 1993-04-29 |
| NL193471C (en) | 1999-11-02 |
| IT1248980B (en) | 1995-02-11 |
| GB9113025D0 (en) | 1991-08-07 |
| IT9020739A0 (en) | 1990-06-22 |
| DE4120563A1 (en) | 1992-01-02 |
| ES2048032B1 (en) | 1994-10-01 |
| CH682258A5 (en) | 1993-08-13 |
| ES2048032A1 (en) | 1994-03-01 |
| FR2663725A1 (en) | 1991-12-27 |
| GB2245276A (en) | 1992-01-02 |
| IT9020739A1 (en) | 1991-12-22 |
| NL193471B (en) | 1999-07-01 |
| GB2245276B (en) | 1994-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BA | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| CNR | Transfer of rights (patent application after its laying open for public inspection) |
Free format text: SAVIO CALDAIE S.P.A.;PARTECIPAZIONI MECCANOTESSILI S.P.A. |
|
| CNR | Transfer of rights (patent application after its laying open for public inspection) |
Free format text: BIASI S.P.A. |
|
| V1 | Lapsed because of non-payment of the annual fee |
Effective date: 20030101 |