EP0008706A1 - Echangeur de chaleur recouvert d'un alliage de plomb, ledit échangeur faisant partie d'un générateur de chaleur chauffé par un combustible, et procédé pour le revêtement par plombage dudit échangeur de chaleur - Google Patents

Echangeur de chaleur recouvert d'un alliage de plomb, ledit échangeur faisant partie d'un générateur de chaleur chauffé par un combustible, et procédé pour le revêtement par plombage dudit échangeur de chaleur Download PDF

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Publication number
EP0008706A1
EP0008706A1 EP79102942A EP79102942A EP0008706A1 EP 0008706 A1 EP0008706 A1 EP 0008706A1 EP 79102942 A EP79102942 A EP 79102942A EP 79102942 A EP79102942 A EP 79102942A EP 0008706 A1 EP0008706 A1 EP 0008706A1
Authority
EP
European Patent Office
Prior art keywords
lead
fuel
exchanger
antimony
heat exchanger
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP79102942A
Other languages
German (de)
English (en)
Other versions
EP0008706B1 (fr
Inventor
Manfred Lehnert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cofrabel Nv
SCHONEWELLE BV
Vaillant Austria GmbH
Vaillant GmbH
Vaillant SARL
Original Assignee
Kw+-Paulus & Co Ltd
Vaillant Austria GmbH
Cofrabel Nv
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
PAULUS K W CO Ltd
Vaillant Ltd
SCHONEWELLE BV
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 Kw+-Paulus & Co Ltd, Vaillant Austria GmbH, Cofrabel Nv, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, PAULUS K W CO Ltd, Vaillant Ltd, SCHONEWELLE BV filed Critical Kw+-Paulus & Co Ltd
Priority to AT79102942T priority Critical patent/ATE977T1/de
Publication of EP0008706A1 publication Critical patent/EP0008706A1/fr
Application granted granted Critical
Publication of EP0008706B1 publication Critical patent/EP0008706B1/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C11/00—Alloys based on lead
    • C22C11/06—Alloys based on lead with tin as the next major constituent
    • 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/10—Lead or alloys based thereon
    • 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

Definitions

  • the present invention relates to a heat exchanger for a fuel heated heat source.
  • Such heat exchangers have hitherto been provided with a top layer of pure lead.
  • a lead layer has proven to be relatively susceptible to corrosion.
  • tin-copper-antimony lead alloys have become known as white metal 5 and white metal 10, the tin contents of which range from 4.5 to 5.5%, the copper content is between 0.5 and 1.5% , the antimony content from 14.5 to 16.5% and the rest is lead or technical contamination.
  • a lead injection molding alloy has become known from DIN 1741, which contains a tin content of 6% and an antimony content of 9 to 11%, the rest is lead or due to technical reasons Impurities. Furthermore, lead alloys for the graphic arts industry have become known from DIN 16512, the tin contents of which range from 2.5 to 3.5% with a simultaneous antimony content of 3.5 to 4.5%, the rest consisting of lead and technically caused impurities. Other alloys for printing purposes have significantly higher antimony contents or relatively large tin contents.
  • Leaflet "Steel" No. 179 has disclosed a lead bath alloy with up to 2.5% tin and 2% antimony, which is said to improve the adhesion of the lead layer. At the same time, the extraordinarily soft and easy-to-damage pure lead layer becomes harder and more mechanically resistant due to the addition of antimony.
  • the bath temperature can be reduced by 40 to 50 ° C by adding tin and antimony.
  • the object of the present invention is to create a heat exchanger which is distinguished by extremely high corrosion resistance to exhaust gases, in particular exhaust gases containing sulfur dioxide, when the dew point is not reached.
  • the solution to the problem with a heat exchanger of the type specified at the outset is that it is made with a known alloy of 6 to 10% tin, 4.5 to 6.5% antimony, the rest lead and technical contingent impurities is covered.
  • a coating alloy with a content of 8% tin, 5.5% antimony, the remainder lead and technical impurities is particularly advantageous.
  • antimony-containing lead alloys for remaining copper heat exchangers was not obvious in the invention, because in a known case (2.5% Sn, maximum 2% SB) the antimony serves to harden the lead layer and thus the lead layer becomes mechanically more resistant.
  • the method according to the invention for remaining a heat exchanger of a fuel-heated heat source assumes that the heat exchanger consisting of copper sheet (99.9% Cu, 0.015-0.050% P, remainder from technically caused contamination, ie SF-Cu) in the form of a heating shaft with an internal lamella block through which a copper water pipe coil is passed, first immersed in phosphoric acid, then rinsed in water and then immersed in sulfuric acid, followed by a rinse in water, followed by immersion in flux (znC12 in aqueous solution). The next step is immersion in the lead bath, consisting of a lead alloy with 8% tin, 5.5% antimony, the rest of the lead and technical impurities. To remove the salt residue, it must then be immersed in water. Alternatively, the part can be dipped in a 5% aqueous HC1 solution and then rinsed with water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating With Molten Metal (AREA)
EP79102942A 1978-08-29 1979-08-13 Echangeur de chaleur recouvert d'un alliage de plomb, ledit échangeur faisant partie d'un générateur de chaleur chauffé par un combustible, et procédé pour le revêtement par plombage dudit échangeur de chaleur Expired EP0008706B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102942T ATE977T1 (de) 1978-08-29 1979-08-13 Mit einer bleilegierung ueberzogener waermetauscher fuer eine brennstoffbeheizte waermequelle und verfahren zum verbleien eines solchen waermetauschers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE7825644 1978-08-29
DE7825644U 1978-08-29

Publications (2)

Publication Number Publication Date
EP0008706A1 true EP0008706A1 (fr) 1980-03-19
EP0008706B1 EP0008706B1 (fr) 1982-05-05

Family

ID=6694622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102942A Expired EP0008706B1 (fr) 1978-08-29 1979-08-13 Echangeur de chaleur recouvert d'un alliage de plomb, ledit échangeur faisant partie d'un générateur de chaleur chauffé par un combustible, et procédé pour le revêtement par plombage dudit échangeur de chaleur

Country Status (2)

Country Link
EP (1) EP0008706B1 (fr)
AT (1) ATE977T1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473693A1 (fr) * 1980-01-14 1981-07-17 Erhardt Gerard Tube echangeur de chaleur pour liquides corrosifs
FR2549494A1 (fr) * 1983-07-19 1985-01-25 Vaillant Sarl Procede de plombage d'elements de construction presentant des surfaces en cuivre et en acier
WO1996036749A1 (fr) * 1995-05-16 1996-11-21 Valeo Térmico, S.A. Procede de protection contre la corrosion externe dans des echangeurs de chaleur en cuivre

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105648377B (zh) * 2016-01-21 2017-12-29 国网山东省电力公司电力科学研究院 一种长时效、可重复使用的热浸镀锌铝镁合金助镀剂

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE137897C (fr) *
DE319734C (de) * 1915-08-25 1920-03-11 Clayton Mark Verfahren zur Herstellung von zinkhaltigen Schutzueberzuegen auf Metallgegenstaenden
GB555154A (en) * 1942-02-04 1943-08-06 Fry S Metal Foundries Ltd Improvements in and relating to soldering
FR886010A (fr) * 1941-09-10 1943-10-01 Hermes Patentverwertungs Gmbh Protection métallique d'objets en cuivre ou alliage de cuivre notamment sur fils pour canalisations électriques isolées au caoutchouc
DE1533431A1 (de) * 1965-04-30 1969-07-10 Yawata Iron & Steel Co Plattierungsbad zum UEberziehen von Gegenstaenden aus Eisen und Stahl
FR2279859A1 (fr) * 1974-07-22 1976-02-20 Armco Steel Corp Articles en acier revetus d'une couche plombee

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE137897C (fr) *
DE319734C (de) * 1915-08-25 1920-03-11 Clayton Mark Verfahren zur Herstellung von zinkhaltigen Schutzueberzuegen auf Metallgegenstaenden
FR886010A (fr) * 1941-09-10 1943-10-01 Hermes Patentverwertungs Gmbh Protection métallique d'objets en cuivre ou alliage de cuivre notamment sur fils pour canalisations électriques isolées au caoutchouc
GB555154A (en) * 1942-02-04 1943-08-06 Fry S Metal Foundries Ltd Improvements in and relating to soldering
DE1533431A1 (de) * 1965-04-30 1969-07-10 Yawata Iron & Steel Co Plattierungsbad zum UEberziehen von Gegenstaenden aus Eisen und Stahl
FR2279859A1 (fr) * 1974-07-22 1976-02-20 Armco Steel Corp Articles en acier revetus d'une couche plombee

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473693A1 (fr) * 1980-01-14 1981-07-17 Erhardt Gerard Tube echangeur de chaleur pour liquides corrosifs
FR2549494A1 (fr) * 1983-07-19 1985-01-25 Vaillant Sarl Procede de plombage d'elements de construction presentant des surfaces en cuivre et en acier
WO1996036749A1 (fr) * 1995-05-16 1996-11-21 Valeo Térmico, S.A. Procede de protection contre la corrosion externe dans des echangeurs de chaleur en cuivre

Also Published As

Publication number Publication date
EP0008706B1 (fr) 1982-05-05
ATE977T1 (de) 1982-05-15

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