EP0826788B1 - Verfahren zum Feuerverzinken - Google Patents

Verfahren zum Feuerverzinken Download PDF

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Publication number
EP0826788B1
EP0826788B1 EP96113879A EP96113879A EP0826788B1 EP 0826788 B1 EP0826788 B1 EP 0826788B1 EP 96113879 A EP96113879 A EP 96113879A EP 96113879 A EP96113879 A EP 96113879A EP 0826788 B1 EP0826788 B1 EP 0826788B1
Authority
EP
European Patent Office
Prior art keywords
components
bath
treatment
baths
heat
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.)
Expired - Lifetime
Application number
EP96113879A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0826788A1 (de
Inventor
Helmut Dipl.-Ing. Naujokat
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.)
Verzinkerei Netzschkau GmbH
Original Assignee
Balcke Duerr GmbH
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
Priority to DE29623455U priority Critical patent/DE29623455U1/de
Application filed by Balcke Duerr GmbH filed Critical Balcke Duerr GmbH
Priority to DK96113879T priority patent/DK0826788T3/da
Priority to EP96113879A priority patent/EP0826788B1/de
Priority to DE59604052T priority patent/DE59604052D1/de
Priority to SI9630127T priority patent/SI0826788T1/xx
Priority to AT96113879T priority patent/ATE188260T1/de
Priority to ES96113879T priority patent/ES2142004T3/es
Priority to RU97114925A priority patent/RU2141003C1/ru
Publication of EP0826788A1 publication Critical patent/EP0826788A1/de
Application granted granted Critical
Publication of EP0826788B1 publication Critical patent/EP0826788B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • 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
    • C23C2/003—Apparatus
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching

Definitions

  • the invention relates to a method for hot-dip galvanizing, in particular for a long time and lean components after passing through at least one degreasing, Pickling and flux baths.
  • Such hot-dip galvanizing processes are known.
  • the containers for the pretreatment of the galvanized Workpieces parallel to each other and transversely to the transport device of the galvanized Workpieces; they are thus transverse to their longitudinal direction with the workpieces to be pretreated, which are suspended on trusses, loaded.
  • the temperature of the pretreatment baths corresponds to essentially the room temperature.
  • each between these treatment baths at least one rinsing bath is arranged to remove the treatment media from the previous bath before the workpieces enter the next Rinse off the treatment bath from the workpieces.
  • the known methods for hot-dip galvanizing not only have the disadvantage long dwell times of the workpieces to be treated in the bathrooms their low temperature, but also require long transportation times between the bathrooms, as the workpieces are suspended in trusses individual gantry cranes are moved.
  • This results in the known Process an unfavorable use of the hot-dip galvanizing plant, in particular the zinc bath, which must always be kept at a high temperature.
  • the multitude of Treatment baths and those arranged between the treatment baths Rinsing baths increase the necessary investments as well Operating cost.
  • the after the galvanizing process of the workpieces in the Unloading trusses must also go through Means of transport back to the loading station of the workpieces to the other Be brought to the end of the galvanizing hall.
  • the invention has for its object to provide a method for hot-dip galvanizing, in particular long and slim components, such as finned tube bundles, of the type described above, which not only requires less investment, but allows a significantly increased efficiency compared to the known hot-dip galvanizing process, which is too significant shorter throughput times of the workpieces and thus reduced costs.
  • the solution to this problem by the invention is characterized in that the components are fed one after the other in the transport direction by means of a continuously circulating transport system, one after the other pretreatment baths, at least one of which carries out several pretreatment steps at the same time and which are kept at a temperature which is higher than the room temperature and are connected to at least one suction device for the resulting vapors.
  • Pretreatment baths arranged in series result in a special one Favorable way, a structurally simple, yet effective seal for the entry and exit of the workpieces in the opposite of the environment to create a sealed space above the pretreatment baths since small and easily sealable components are found, especially with long and slim components Opening cross sections result.
  • the hot-dip galvanizing process with one of the galvanizing process downstream targeted cooling of the galvanized components can be carried out according to one Another feature of the invention is the heat for heating the pretreatment baths to a temperature above room temperature at least in part by recovering the galvanized ones as they cool down Components released heat are generated. This way a not inconsiderable energy saving.
  • heat can be used for partial heating of the Drying of the pretreated components before the galvanizing required air be used, which is associated with a further energy saving.
  • the invention proposes that in the galvanizing process released heat for heating the pretreatment baths and / or Recover drying of the pre-treated components.
  • the one in the galvanizing process released heat includes radiation heat generated by the zinc bath and when the zinc bath is heated by burning fossil fuels in the exhaust gases of that combustion contained heat.
  • the Hot-dip galvanizing process according to the invention with cooling of the galvanized components in a downstream of the galvanizing process Water bath works, is finally proposed with the invention, the Filling the pre-treatment tank due to loss of evaporation required water in the water bath downstream of the galvanizing process refer to. Because the water is used to cool the galvanized components used water bath has a high temperature, the in this Water contains heat at the same time as the pretreatment baths used, whereas to fill up the evaporation losses Water supplied at about room temperature the cooling effect of this the galvanizing process downstream water bath increased.
  • the schematic plan view of an embodiment of a hot dip galvanizing plant shows a continuously rotating transport system T, for example in the form of a monorail, which operates as a closed ring railway and is automated so that the transport and lowering processes of the Traverses suspended components made in time. In one embodiment are carried out eight work cycles per hour, so that at Traverse batches of up to three tons a throughput through the Galvanizing plant of 24 tons per hour results.
  • the components to be galvanized are in the embodiment on three in the direction of transport consecutive loading stations 1a, 1b and 1c the Transport system T abandoned and after going through a semicircular Transport route fed to a first pretreatment bath 2.
  • This pretreatment bath 2 is with a treatment medium of 47.5% sixteen percent hydrochloric acid, 2% degreasing agent and 0.5% inhibitor (Wetting agent) and 50% water filled and has one in the embodiment Temperature of 70 ° C.
  • This pretreatment bath takes place at the same time a degreasing and pickling process takes place.
  • the degreased and pre-pickled component then passes into another one Pretreatment bath 3, in which the remaining pickling process takes place.
  • This pretreatment bath 3 also kept at a temperature of 70 ° C. contains an aqueous solution of 49.5% sixteen percent hydrochloric acid and 0.5% inhibitor (wetting agent) and 50% water.
  • the pickling bath is followed by a further pretreatment bath 4, the one contains aqueous solution with a total of about 60% flux, for example composed of 40% ammonium chloride and 60% zinc chloride and kept at a temperature of 90 ° C.
  • aqueous solution with a total of about 60% flux, for example composed of 40% ammonium chloride and 60% zinc chloride and kept at a temperature of 90 ° C.
  • the component pretreated in this way is then a zinc bath 6 fed that filled with liquid zinc at a temperature of about 445 ° C is.
  • the liquid zinc can be used to improve the galvanizing quality Nickel content of 0.05% can be added.
  • the component in the zinc bath 6 After a dwell time corresponding to the cycle time of the transport system T. the component in the zinc bath 6, the component is removed from the zinc bath 6, shaken and in the illustrated embodiment by a brush station 7 guided, in which zinc drops adhering to the component are brushed off in order to to make post-treatment of the galvanized components unnecessary.
  • the hot-dip galvanized component then passes into a cooling bath 8, which coincides with Water is filled. This water reaches due to the introduced in time galvanized components a temperature up to 100 ° C.
  • the heat required to heat the pretreatment baths 2, 3 and 4 can be at least partially recovered by cooling the galvanized components are released heat.
  • this heat recovery that heats up in the cooling bath 8 Water used.
  • Vapors contained heat can be used, preferably partially Heating of the air with which the pretreated components in the drying zone 5 be dried before entering the zinc bath 6.
  • the zinc bath 6 during the galvanizing process heat released to heat the pretreatment tanks 2, 3 or 4 and / or for drying the pretreated components in the drying zone 5 use.
  • the heat released during the galvanizing process is concerned the heat released by the radiation of the zinc bath, on the other hand to heat contained in exhaust gases when the zinc bath 6 through Burning fossil fuels kept at the desired temperature becomes.
  • Recyclable materials are particularly iron oxide, which is caused by the Pickling processes from rust adhering to the pretreated components or Tinder is formed and in the form of sludge from the sump of the pretreatment baths 2, 3 and 4 is subtracted. By filtering and processing This sludge can extract the valuable materials contained therein become.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
EP96113879A 1996-08-30 1996-08-30 Verfahren zum Feuerverzinken Expired - Lifetime EP0826788B1 (de)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DK96113879T DK0826788T3 (da) 1996-08-30 1996-08-30 Fremgangsmåde til varmforzinkning
EP96113879A EP0826788B1 (de) 1996-08-30 1996-08-30 Verfahren zum Feuerverzinken
DE59604052T DE59604052D1 (de) 1996-08-30 1996-08-30 Verfahren zum Feuerverzinken
SI9630127T SI0826788T1 (en) 1996-08-30 1996-08-30 Galvanizing method
DE29623455U DE29623455U1 (de) 1996-08-30 1996-08-30 Anlage zum Feuerverzinken
ES96113879T ES2142004T3 (es) 1996-08-30 1996-08-30 Procedimiento para el galvanizado por inmersion en caliente.
AT96113879T ATE188260T1 (de) 1996-08-30 1996-08-30 Verfahren zum feuerverzinken
RU97114925A RU2141003C1 (ru) 1996-08-30 1997-08-29 Способ горячего цинкования

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96113879A EP0826788B1 (de) 1996-08-30 1996-08-30 Verfahren zum Feuerverzinken

Publications (2)

Publication Number Publication Date
EP0826788A1 EP0826788A1 (de) 1998-03-04
EP0826788B1 true EP0826788B1 (de) 1999-12-29

Family

ID=8223144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113879A Expired - Lifetime EP0826788B1 (de) 1996-08-30 1996-08-30 Verfahren zum Feuerverzinken

Country Status (7)

Country Link
EP (1) EP0826788B1 (es)
AT (1) ATE188260T1 (es)
DE (2) DE29623455U1 (es)
DK (1) DK0826788T3 (es)
ES (1) ES2142004T3 (es)
RU (1) RU2141003C1 (es)
SI (1) SI0826788T1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2536733C1 (ru) * 2013-05-14 2014-12-27 Общество С Ограниченной Ответственностью "Евростандарт" Способ нанесения покрытия на длинномерное металлическое изделие из расплава
DE102022102291A1 (de) 2022-02-01 2023-08-03 The Coatinc Company Holding GmbH Verzinkungsanlage und Verfahren zur Verzinkung von Stückgut

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852410A (en) * 1954-03-16 1958-09-16 Republic Steel Corp Use of titanium article support for hot dip galvanizing apparatus
GB1433019A (en) * 1973-06-26 1976-04-22 Turner Lisle Ltd Galvanizing plant
JPS59211563A (ja) * 1983-05-16 1984-11-30 Marushiyou Kogyo Kk 自動浸漬装置
DE3409935C1 (de) * 1983-11-11 1985-04-18 Hoesch Ag, 4600 Dortmund Verfahren und Einrichtung zum Feuerverzinken von Rippenrohren
JPH079055B2 (ja) * 1990-02-21 1995-02-01 新日本製鐵株式会社 合金化亜鉛めっき鋼板の製造方法

Also Published As

Publication number Publication date
ES2142004T3 (es) 2000-04-01
DK0826788T3 (da) 2000-06-13
DE59604052D1 (de) 2000-02-03
SI0826788T1 (en) 2000-04-30
RU2141003C1 (ru) 1999-11-10
EP0826788A1 (de) 1998-03-04
DE29623455U1 (de) 1998-08-13
ATE188260T1 (de) 2000-01-15

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