BE851025R - PROCESS FOR THE CONTINUOUS GALVANIZATION OF METAL SHEETS - Google Patents
PROCESS FOR THE CONTINUOUS GALVANIZATION OF METAL SHEETSInfo
- Publication number
- BE851025R BE851025R BE6045857A BE6045857A BE851025R BE 851025 R BE851025 R BE 851025R BE 6045857 A BE6045857 A BE 6045857A BE 6045857 A BE6045857 A BE 6045857A BE 851025 R BE851025 R BE 851025R
- Authority
- BE
- Belgium
- Prior art keywords
- cylinder
- zinc
- sheet
- metal sheets
- edges
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 15
- 229910052725 zinc Inorganic materials 0.000 claims description 15
- 239000011701 zinc Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 5
- 230000003749 cleanliness Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000001680 brushing effect Effects 0.000 claims 1
- 238000007790 scraping Methods 0.000 claims 1
- 238000005246 galvanizing Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
-
- 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
- C23C2/006—Pattern or selective deposits
- C23C2/0062—Pattern or selective deposits without pre-treatment of the material to be coated, e.g. using masking elements such as casings, shields, fixtures or blocking elements
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)
- Electroplating Methods And Accessories (AREA)
Description
Association sans but lucratif - Vereniging zonder winstoogmerk,
à Bruxelles
La présente invention se rapporte à des perfectionnements apportés à un procédé pour la galvanisation en continu des tôles métalliques, procédé repris au brevet belge n[deg.] 840. 822.
Il a été décrit dans ce brevet principal un procédé de galvanisation en continu des tôles métalliques, caractérisé en ce que, avant son introduction dans le bain de zinc, la tôle est mise en contact avec un cylindre rotatif,
1 tournant autour de son axe longitudinal, le dit cylindre étant partiellement <EMI ID=1.1>
dépasser les bords de celui-ci, est introduite dans le bain de zinc, et en ce que le contact entre la tôle et le cylindre n'est supprimé qu'après 11 sortie de la tôle du dit bain.
Le présent perfectionnement a pour objet, notamment dans le cadre du procédé de galvanisation rappelé ci-dessus, de maintenir le cylindre autour d'une partie duquel est enroulée la tôle à galvaniser, dans un état de propreté suffisant pour qu'aucune particule de zinc ne puisse se déposer sur la face de la tôle à ne pas galvaniser. Ce perfectionnement est toutefois susceptible d'être utilisé avec d'autres métaux de recouvrement, en l'occurrence l'aluminium
ou l'étain.
Suivant une première variante de l'invention, ce résultat est obtenu en enlevant le zinc liquide, qui a tendance à se déposer sur les extrémités du cylindre qui, dépassant quelque peu axialement la largeur de la tôle, se trouvent périodiquement et alternativement dans le bain de zinc, puis hors de ce même bain. Notons ici en passant qu'au cours de l'opération de galvanisation, la tôle peut se déplacer axialement sur le cylindre, ce qui accentue la nécessité de l'enlèvement du zinc aux extrémités du cylindre.
Plusieurs méthodes peuvent être avantageusement utilisées pour enlever le zinc déposé sur le cylindre . On peut par exemple utiliser un organe solide tel qu'une brosse ou un racloir qui provoque le déplacement du zinc vers les bords du cylindre ou le bas de ses extrémités, ce déplacement comportant une composante de préférence en sens inverse du sens de rotation du cylindre.
Il est également avantageux de faire usage d'un fluide gazeux pour repousser par soufflage le zinc liquide vers les bords du cylindre ou le bas de ses extrémités. Cette façon de procéder permet en sus un certain réglage des conditions de soufflage du zinc.
Suivant une deuxième variante de l'invention, le même résultat
est obtenu en faisant usage d'un cylindre dont au moins la paroi externe cylindrique est constituée d'un matériau "ne prenant pas la galvanisation", c'est-à, dire ne réagissant pas avec lui chimiquement ou physiquement et ne le mouillant is, à une température au moins égale à la température de fusion du zinc. titre d'exemple, certains silicones, silicates - aluminates, revêtement asma, conviennent très bien à cet effet
Le procédé ci-dessus a été décrit comme pouvant être utilisé pour ;surer la propreté des extrémités d'un cylindre partiellement immergé dans
<EMI ID=2.1>
�rfectionnement couvre également le cas où, à la place du zinc, il est fait sage d'étain ou d'aluminium liquide pour le recouvrement de tôles sur une �ule face.
REVENDICATIONS
1. Procédé pour la galvanisation en continu de tôles métalliques conformément à l'une ou l'autre des revendications du brevet principal, caractérisé en ce que, pendant l'opération de galvanisation, on maintient le cylindre autour d'une partie duquel est enroulée la tôle à galvaniser dans un état de propreté suffisant pour qu'aucune particule de zinc ne puisse se déposer sur la face de la tôle à ne pas galvaniser.
Non-profit association - Vereniging zonder winstoogmerk,
in Brussels
The present invention relates to improvements made to a process for the continuous galvanization of metal sheets, a process taken up in Belgian patent n [deg.] 840. 822.
It has been described in this main patent a continuous galvanizing process for metal sheets, characterized in that, before its introduction into the zinc bath, the sheet is brought into contact with a rotating cylinder,
1 rotating around its longitudinal axis, said cylinder being partially <EMI ID = 1.1>
protruding from the edges thereof, is introduced into the zinc bath, and in that the contact between the sheet and the cylinder is removed only after leaving the sheet of said bath.
The object of this improvement, in particular in the context of the galvanizing process mentioned above, is to maintain the cylinder around a part of which the sheet to be galvanized is wound, in a state of sufficient cleanliness so that no zinc particles cannot be deposited on the face of the sheet not to be galvanized. This improvement is however likely to be used with other coating metals, in this case aluminum.
or tin.
According to a first variant of the invention, this result is obtained by removing the liquid zinc, which tends to be deposited on the ends of the cylinder which, extending somewhat axially the width of the sheet, are found periodically and alternately in the bath. of zinc, then out of that same bath. It should be noted here in passing that during the galvanizing operation, the sheet can move axially on the cylinder, which accentuates the need for the removal of the zinc at the ends of the cylinder.
Several methods can be advantageously used to remove the zinc deposited on the cylinder. One can for example use a solid member such as a brush or a scraper which causes the displacement of the zinc towards the edges of the cylinder or the bottom of its ends, this displacement comprising a component preferably in the opposite direction of the direction of rotation of the cylinder. .
It is also advantageous to use a gaseous fluid to blow the liquid zinc away towards the edges of the cylinder or the bottom of its ends. This procedure also allows a certain adjustment of the zinc blowing conditions.
According to a second variant of the invention, the same result
is obtained by making use of a cylinder of which at least the cylindrical outer wall is made of a material "not taking galvanization", that is to say, not reacting with it chemically or physically and not wetting it is , at a temperature at least equal to the melting temperature of the zinc. for example, certain silicones, silicates - aluminates, asma coating, are very suitable for this purpose
The above process has been described as being able to be used to ensure the cleanliness of the ends of a cylinder partially submerged in
<EMI ID = 2.1>
(Refinement also covers the case where instead of zinc it is made wise of tin or liquid aluminum for the coating of sheets on one side.
CLAIMS
1. Process for the continuous galvanizing of metal sheets according to one or the other of the claims of the main patent, characterized in that, during the galvanizing operation, the cylinder is maintained around a part of which is wound the sheet to be galvanized in a sufficient state of cleanliness so that no zinc particles can be deposited on the face of the sheet not to be galvanized.
Claims (1)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6045857A BE851025R (en) | 1977-02-02 | 1977-02-02 | PROCESS FOR THE CONTINUOUS GALVANIZATION OF METAL SHEETS |
DE19772716198 DE2716198A1 (en) | 1976-04-15 | 1977-04-12 | PROCESS FOR CONTINUOUS GALVANIC PLATING OF METAL SHEETS |
GB15723/77A GB1533193A (en) | 1976-04-15 | 1977-04-15 | Continuous hot-dip coating of metal strip |
IT67841/77A IT1116737B (en) | 1976-04-15 | 1977-04-15 | CONTINUOUS GALVANIZATION OF METAL SHEETS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6045857A BE851025R (en) | 1977-02-02 | 1977-02-02 | PROCESS FOR THE CONTINUOUS GALVANIZATION OF METAL SHEETS |
Publications (1)
Publication Number | Publication Date |
---|---|
BE851025R true BE851025R (en) | 1977-08-02 |
Family
ID=3874715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE6045857A BE851025R (en) | 1976-04-15 | 1977-02-02 | PROCESS FOR THE CONTINUOUS GALVANIZATION OF METAL SHEETS |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE851025R (en) |
-
1977
- 1977-02-02 BE BE6045857A patent/BE851025R/en active
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