EP0011058A1 - Process for galvanizing selected areas of a metal article and galvanized articles produced by this process - Google Patents
Process for galvanizing selected areas of a metal article and galvanized articles produced by this process Download PDFInfo
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- EP0011058A1 EP0011058A1 EP79870021A EP79870021A EP0011058A1 EP 0011058 A1 EP0011058 A1 EP 0011058A1 EP 79870021 A EP79870021 A EP 79870021A EP 79870021 A EP79870021 A EP 79870021A EP 0011058 A1 EP0011058 A1 EP 0011058A1
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- cement
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- 239000002184 metal Substances 0.000 title claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 23
- 238000005246 galvanizing Methods 0.000 title description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 20
- 239000011701 zinc Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007900 aqueous suspension Substances 0.000 claims abstract description 3
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 230000008018 melting Effects 0.000 claims abstract description 3
- 238000002844 melting Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000011398 Portland cement Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000008237 rinsing water Substances 0.000 claims description 2
- 238000007790 scraping Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims 2
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 description 6
- 230000001680 brushing effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- C23C2/02—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
-
- 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
- C23C2/0224—Two or more thermal pretreatments
Definitions
- the present invention relates to a process for the local coating of a base metal with a molten metal coating and more particularly relates to a process for the galvanization of strips or strips of ferrous metal, on one side; the invention also extends to the products obtained by this process.
- the aims pursued during the coating on a single face of metal strips or sheets are well known and have been described in American patents 3,121,019 and 3,149,987.
- the coating on a surface is in particular desirable for obtaining corrosion resistance properties of zinc on one side of the metal, while the other side retains its initial surface without coating to allow inter alia the adhesion of the paint or the spot welding.
- the present invention aims to provide a method by which a selected part or parts only of a piece of metal can be galvanized and the invention relates more specifically to a method of galvanizing only one side of a metal sheet.
- the process can be practiced either as a batch process on individual sheets or as a continuous process on a tape. In each case, the steps performed on the material are the same.
- the metal is first cleaned so that its surface is suitable for receiving the zinc.
- the parts of the metal which are not to be galvanized are then coated with a mask material which is dried.
- the metal is heated and immersed in the zinc and when the zinc coating has solidified, the mask material is removed.
- the surface which was previously covered by the mask material is clean and suitable for any other treatment which may be necessary.
- a material serving as a suitable protective mask must however meet the following requirements in order to allow effective use: it must be inexpensive, easy to apply and have good adhesion to the substrate during galvanization while being easily removable after galvanization.
- the material must withstand high temperatures, that is to say a minimum temperature of about 450-500 °, which is the temperature of liquid zinc and preferably at a temperature of 900 ° C, view of protecting the metal against oxidation during possible subsequent heat treatments (for example tempering).
- the material serving as a mask must also not pollute the zinc bath and remain free of zinc in order to avoid excessive entrainment of the zinc out of the galvanizing bath.
- it must allow easy and inexpensive installation of the necessary equipment in existing galvanizing lines.
- the present invention provides a process in which an article of ferrous metal, preferably a strip or sheet, is coated on the surface to be protected with an aqueous suspension of cement, after which said article is successively dried and heated to a temperature -above the zinc melting point, moved into the molten zinc bath and finally undergoes a cleaning step to remove the cement.
- Cement is understood to mean a finely ground mineral material generally consisting of alumina, silica, lime, iron oxide and magnesia which have been calcined in an oven, which when mixed with water forms a plastic mass or paste which hardens by chemical reaction, freezing and crystallization. Any type of conventional cement is suitable, Portland cement being particularly suitable due to its high availability.
- the particle size of the cement that is used will preferably be less than 74 ⁇ m and preferably between 0.25 pm and 75 pm.
- the mask material In order to facilitate the coating of the mask material on the metal substrate, it will be prepared in the form of a relatively fluid paste with water in which various other additives can be added.
- various other additives can be added.
- hydrochloric acid appeared to be particularly useful.
- Other additives such as binding agents for promoting the adhesion of mask material to the substrate, as well as viscosity modifiers, etc. are also within the scope of the present invention.
- a mixture containing 140 ml of water, 140 ml of 10% hydrochloric acid and 200 g of Portland cement is generally recommended, since it will adhere easily to the substrate.
- the application as a mask can be carried out using suitable equipment such as a brush, a roller or by spraying.
- This coating operation is preferably carried out after the material of the substrate which is to be treated has been previously pickled, preferably using hydrochloric acid and / or degreased.
- the drying and heating step can be carried out by any suitable means such as a heating oven operating at a suitable temperature.
- the article to be treated is heated before it is introduced into the molten zinc bath to a temperature approaching the temperature of the molten zinc bath.
- the product After galvanizing, the product can be cooled in an atmosphere of protective gas such as nitrogen.
- the removal of the material serving as a mask can be carried out by any mechanical or physico-mechanical technique such as air blowing, dry brushing, washing with water, with or without simultaneous brushing.
- the article having undergone local galvanization can undergo a final rinsing step, for example using cold water.
- a solvent which is preferably a water-immiscible solvent can be added to the rinsing water.
- the cement which has been applied to the metal part dries and adheres properly to the substrate, which allows its handling and transport as well as its introduction into the bath.
- the adhesion is such that by scraping the cement using a suitable tool, a complementary local surface can be released for subsequent galvanization.
- This technique can be useful for making corrections or for making it possible to galvanize localized surfaces in a relatively large field having received a material serving as a mask.
- the method is particularly suitable for the continuous coating of a steel strip or sheet, but is not limited thereto.
- One side of a strip of metal which has undergone pickling receives a coating of a preparation containing 140 ml of water, 140 ml of 10% hydrochloric acid and 200 g of Portland cement.
- the coating is such that the metal is covered with 170 g of dry matter per square meter.
- the sheet is then heated to approximately 400 ° C and enters a bath of molten zinc at a temperature of approximately 44O-46O ° C.
- the sheet is removed from the bath after one minute and rinsed under a stream of water with simultaneous brushing.
- the galvanized metal sheet has a shiny surface on the side which has not been galvanized, while the other side has received a uniform coating of a layer of zinc having the usual quality which is observed for galvanizing on two sides.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
La présente invention concerne un procédé pour le revêtement local d'un métal de base par un revêtement métallique fondu et concerne plus particulièrement un procédé pour la galvanisation de bandes ou de feuillards de métal ferreux, sur un seul côté; l'invention s'étend également aux produits obtenus par ce procédé.The present invention relates to a process for the local coating of a base metal with a molten metal coating and more particularly relates to a process for the galvanization of strips or strips of ferrous metal, on one side; the invention also extends to the products obtained by this process.
Les buts poursuivis lors du revêtement sur une seule face de bandes de métal ou de feuilles sont bien connus et ont été décrits dans les brevets américains 3,121,019 et 3,149,987. Le revêtement sur une surface est en particulier souhaitable pour obtenir des propriétés de résistance à la corrosion du zinc sur une face du métal, tandis que l'autre face conserve sa surface initiale sans revêtement pour permettre entre autre l'adhérence de la peinture ou la soudure par points.The aims pursued during the coating on a single face of metal strips or sheets are well known and have been described in American patents 3,121,019 and 3,149,987. The coating on a surface is in particular desirable for obtaining corrosion resistance properties of zinc on one side of the metal, while the other side retains its initial surface without coating to allow inter alia the adhesion of the paint or the spot welding.
La présente invention vise à fournir un procédé par lequel une partie ou des parties choisies seulement d'une pièce de métal peuvent être galvanisées et l'invention concerne plus spécifiquement un procédé de galvanisation d'une face seulement d'une feuille de métal. Le procédé peut être mis en pratique soit sous forme d'un procédé discontinu sur des feuilles individuelles soit sous forme d'un procédé continu sur une bande. Dans chaque cas, les étapes effectuées sur le matériau sont les mêmes.The present invention aims to provide a method by which a selected part or parts only of a piece of metal can be galvanized and the invention relates more specifically to a method of galvanizing only one side of a metal sheet. The process can be practiced either as a batch process on individual sheets or as a continuous process on a tape. In each case, the steps performed on the material are the same.
Selon l'invention, le métal est d'abord nettoyé de manière que sa surface convienne pour recevoir le zinc. Les parties du métal qui ne doivent pas subir la galvanisation reçoivent ensuite un revêtement d'une matière servant de masque qui est séchée. Ensuite, le métal est chauffé et plongé dans le zinc et lorsque le revêtement de zinc s'est solidifié, la matière servant de masque est éliminée. La surface qui était antérieurement recouverte par la matière servant de masque est propre et convient pour tout autre traitement qui peut être nécessaire.According to the invention, the metal is first cleaned so that its surface is suitable for receiving the zinc. The parts of the metal which are not to be galvanized are then coated with a mask material which is dried. Then, the metal is heated and immersed in the zinc and when the zinc coating has solidified, the mask material is removed. The surface which was previously covered by the mask material is clean and suitable for any other treatment which may be necessary.
Différentes matières servant de masque ont été proposées dans le passé. Une matière servant de masque de protection convenable doit cependant répondre aux exigences suivantes afin de permettre une utilisation efficace : elle doit être bon marché, facile à appliquer et présenter une bonne adhérence au substrat lors de la galvanisation tout en étant facilement éliminable après galvanisation. De plus, la matière doit résister à des températures élevées, c'est-à-dire à une température minimale d'environ 450-500°, qui est la température du zinc liquide et de préférence à une température de 900°C, en vue de protéger le métal contre l'oxydation lors de traitements thermiques ultérieurs éventuels (par exemple un revenu). La matière servant de masque ne doit également pas polluer le bain de zinc et rester exempte de zinc en vue d'éviter un entraînement trop important du zinc hors du bain de galvanisation. Finalement, il doit permettre une installation facile et bon marché de l'équipement nécessaire dans des lignes de galvanisation existantes.Various materials serving as a mask have been proposed in the past. A material serving as a suitable protective mask must however meet the following requirements in order to allow effective use: it must be inexpensive, easy to apply and have good adhesion to the substrate during galvanization while being easily removable after galvanization. In addition, the material must withstand high temperatures, that is to say a minimum temperature of about 450-500 °, which is the temperature of liquid zinc and preferably at a temperature of 900 ° C, view of protecting the metal against oxidation during possible subsequent heat treatments (for example tempering). The material serving as a mask must also not pollute the zinc bath and remain free of zinc in order to avoid excessive entrainment of the zinc out of the galvanizing bath. Finally, it must allow easy and inexpensive installation of the necessary equipment in existing galvanizing lines.
La présente invention fournit un procédé dans lequel un article de métal ferreux, de préférence une bande ou une feuille, subit un revêtement sur la surface à protéger par une suspension aqueuse de ciment, après quoi ledit article est successivement séché et chauffé à une température au-dessus du point de fusion du zinc, déplacé dans le bain de zinc fondu et subit finalement une étape de nettoyage pour éliminer le ciment.The present invention provides a process in which an article of ferrous metal, preferably a strip or sheet, is coated on the surface to be protected with an aqueous suspension of cement, after which said article is successively dried and heated to a temperature -above the zinc melting point, moved into the molten zinc bath and finally undergoes a cleaning step to remove the cement.
On entend par ciment, une matière minérale finement broyée généralement constituée d'alumine, de silice, de chaux, d'oxyde de fer et de magnésie qui ont été calcinés dans un four, qui lorsqu'elle est mélangée avec de l'eau forme une masse ou une pâte plastique qui durcit par réaction chimique, prise en gel et cristallisation. Tout type de ciment classique convient, le ciment Portland étant particulièrement adéquat par suite de sa grande disponibilité.Cement is understood to mean a finely ground mineral material generally consisting of alumina, silica, lime, iron oxide and magnesia which have been calcined in an oven, which when mixed with water forms a plastic mass or paste which hardens by chemical reaction, freezing and crystallization. Any type of conventional cement is suitable, Portland cement being particularly suitable due to its high availability.
. La granulométrie du ciment que l'on utilise sera de préférence inférieure à 74 pm et de préférence entre 0,25 pm et 75 pm.. The particle size of the cement that is used will preferably be less than 74 μm and preferably between 0.25 pm and 75 pm.
En vue de faciliter le revêtement de la matière servant de masque sur le substrat métallique, celle-ci sera préparée sous forme d'une pâte relativement fluide avec de l'eau dans laquelle différents autres additifs peuvent être ajoutés. L'addition d'acide chlorhydrique est apparue particulièrement utile. D'autres additifs tels que des agents liants destinés à promouvoir l'adhérence de matière servant de masque sur le substrat, de même que des agents de modification de viscosité, etc relèvent également de la présente invention.In order to facilitate the coating of the mask material on the metal substrate, it will be prepared in the form of a relatively fluid paste with water in which various other additives can be added. The addition of hydrochloric acid appeared to be particularly useful. Other additives such as binding agents for promoting the adhesion of mask material to the substrate, as well as viscosity modifiers, etc. are also within the scope of the present invention.
Un mélange contenant 140 ml d'eau, 140 ml d'acide chlorhydrique à 10 % et 200 g de ciment Portland est généralement recommandable, du fait qu'il adhérera facilement au substrat.A mixture containing 140 ml of water, 140 ml of 10% hydrochloric acid and 200 g of Portland cement is generally recommended, since it will adhere easily to the substrate.
L'application de la manière servant de masque peut se réaliser à l'aide d'un équipement convenable tel qu'une brosse, un rouleau ou par pulvérisation. Cette opération de revêtement s'effectue de préférence après que la matière du substrat qui doit être traitée a été préalablement décapée, de préférence à l'aide d'acide chlorhydrique et/ou dégraissée.The application as a mask can be carried out using suitable equipment such as a brush, a roller or by spraying. This coating operation is preferably carried out after the material of the substrate which is to be treated has been previously pickled, preferably using hydrochloric acid and / or degreased.
L'étape de séchage et de chauffage peut s'effectuer par n'importe quels moyens convenables tels qu'un four de chauffage fonctionnant à une température convenable.The drying and heating step can be carried out by any suitable means such as a heating oven operating at a suitable temperature.
De préférence, l'article qui doit être traité est chauffé avant son introduction dans le bain fondu de zinc à une température approchant la température du bain de zinc fondu.Preferably, the article to be treated is heated before it is introduced into the molten zinc bath to a temperature approaching the temperature of the molten zinc bath.
Après galvanisation, le produit peut être refroidi dans une atmosphère de gaz protecteur tel que l'azote.After galvanizing, the product can be cooled in an atmosphere of protective gas such as nitrogen.
L'élimination de la matière servant de masque peut s'effectuer par n'importe quelle technique mécanique ou physico-mécanique telle que soufflage d'air, brossage à sec, lavage à l'eau, avec ou sans brossage simultané.The removal of the material serving as a mask can be carried out by any mechanical or physico-mechanical technique such as air blowing, dry brushing, washing with water, with or without simultaneous brushing.
Après élimination de la matière servant de masque, l'article ayant subi une galvanisation locale peut subir une étape de rinçage final, par exemple en utilisant de l'eau froide. En vue d'éviter toute oxydation sur les parties non galvanisées de la pièce, un solvant qui est de préférence un solvant non-miscible à l'eau peut être ajouté à l'eau de rinçage.After removal of the mask material, the article having undergone local galvanization can undergo a final rinsing step, for example using cold water. In order to avoid any oxidation on the non-galvanized parts of the part, a solvent which is preferably a water-immiscible solvent can be added to the rinsing water.
Après chauffage, le ciment qui a été appliqué sur la pièce métallique, sèche et adhère convenablement au substrat, ce qui permet sa manipulation et son transport ainsi que son introduction dans le bain. L'adhérence est telle qu'en grattant le ciment à l'aide d'un outil convenable, une surface locale complémentaire peut être libérée pour une galvanisation ultérieure.After heating, the cement which has been applied to the metal part, dries and adheres properly to the substrate, which allows its handling and transport as well as its introduction into the bath. The adhesion is such that by scraping the cement using a suitable tool, a complementary local surface can be released for subsequent galvanization.
Cette technique peut être intéressante pour réaliser des corrections ou pour rendre possible la galvanisation de surfaces localisées dans un champ relativement important ayant reçu une matière servant de masque.This technique can be useful for making corrections or for making it possible to galvanize localized surfaces in a relatively large field having received a material serving as a mask.
Le procédé convient tout particulièrement pour le revêtement continu d'une bande ou d'une feuille d'acier mais n'y est pas limité.The method is particularly suitable for the continuous coating of a steel strip or sheet, but is not limited thereto.
En vue d'illustrer plus en détail l'invention, un mode d'exécution spécifique de l'invention sera décrit ci-après en référence au schéma opératoire du procédé de l'invention, représenté à la figure 1 annexee.In order to illustrate the invention in more detail, a specific embodiment of the invention will be described below with reference to the operating diagram of the method of the invention, shown in Figure 1 attached.
Un côté d'une bande de métal qui a subi un décapage reçoit un revêtement d'une préparation contenant 140 ml d'eau, 140 ml d'acide chlorhydrique à 10 % et 200 g de ciment Portland.One side of a strip of metal which has undergone pickling receives a coating of a preparation containing 140 ml of water, 140 ml of 10% hydrochloric acid and 200 g of Portland cement.
Le revêtement est tel que le métal est recou- vert de 170 g de matière sèche par mètre carré. La feuille est ensuite chauffée à approximativement 400°C et pénètre dans un bain de zinc fondu à une température d'environ 44O-46O°C. La feuille est retirée du bain après une minute et rincée sous un courant d'eau avec brossage simultané.The coating is such that the metal is covered with 170 g of dry matter per square meter. The sheet is then heated to approximately 400 ° C and enters a bath of molten zinc at a temperature of approximately 44O-46O ° C. The sheet is removed from the bath after one minute and rinsed under a stream of water with simultaneous brushing.
La feuille de métal galvanisé présente une surface brillante sur la face qui n'a pas été galvanisée, tandis que l'autre face a reçu un revêtement uniforme d'une couche de zinc présentant la qualité habituelle que l'on observe pour la galvanisation sur deux faces.The galvanized metal sheet has a shiny surface on the side which has not been galvanized, while the other side has received a uniform coating of a layer of zinc having the usual quality which is observed for galvanizing on two sides.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6046604 | 1978-09-13 | ||
BE6046604A BE870460A (en) | 1978-09-13 | 1978-09-13 | METALLIZATION TREATMENT PROCESS AND PRODUCTS OBTAINED |
Publications (1)
Publication Number | Publication Date |
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EP0011058A1 true EP0011058A1 (en) | 1980-05-14 |
Family
ID=3874797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79870021A Ceased EP0011058A1 (en) | 1978-09-13 | 1979-09-06 | Process for galvanizing selected areas of a metal article and galvanized articles produced by this process |
Country Status (6)
Country | Link |
---|---|
US (1) | US4264652A (en) |
EP (1) | EP0011058A1 (en) |
JP (1) | JPS5538999A (en) |
BE (1) | BE870460A (en) |
CA (1) | CA1135573A (en) |
ZA (1) | ZA794843B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3150998C2 (en) * | 1981-12-23 | 1984-06-20 | Peri-Werk Artur Schwörer GmbH & Co KG, 7912 Weißenhorn | Process for hot-dip galvanizing and specific part for hot-dip galvanizing |
JP2002257045A (en) * | 2001-03-02 | 2002-09-11 | Toyota Industries Corp | Piston type compressor |
DE102010009616A1 (en) * | 2010-02-27 | 2011-09-01 | Mtu Aero Engines Gmbh | Method of making or repairing a component and cover coating |
US11077728B2 (en) | 2018-04-03 | 2021-08-03 | Sti Holdings, Inc. | Tooling and method for galvanizing kingpin coupler |
CN114214687A (en) * | 2021-12-22 | 2022-03-22 | 芜湖双翼液压件有限公司 | Hydraulic valve rod and sectional function sectional treatment process thereof |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE70993C (en) * | W. HAGEMANN in Berlin S., Ritterstr. 105 | Process for the production of a one-sided or partial metal coating on metal objects | ||
FR1327962A (en) * | 1962-04-27 | 1963-05-24 | United States Steel Corp | Method and composition for protecting steel against deposition of molten coating metal |
US3149987A (en) * | 1961-12-11 | 1964-09-22 | Bethlehem Steel Corp | Method of coating metals |
FR1443032A (en) * | 1964-08-17 | 1966-06-17 | United States Steel Corp | Process for making galvanized ferrous metal |
DE2446169A1 (en) * | 1974-09-27 | 1976-04-22 | Metallgesellschaft Ag | Protective ceramic coating - for hot dip galvanizing tanks and equipment |
DE2724768A1 (en) * | 1976-06-01 | 1977-12-08 | Kawasaki Steel Co | PROCESS FOR PRODUCING SINGLE-SIDE CLADED STEEL SHEETS OR STRIPS |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2894850A (en) * | 1958-05-14 | 1959-07-14 | Gen Motors Corp | Method of galvanizing ferrous metal strip |
US3181963A (en) * | 1960-11-08 | 1965-05-04 | Wheeling Steel Corp | Alkali metal borate masking in galvanizing process |
US3121019A (en) * | 1961-02-20 | 1964-02-11 | Selas Corp Of America | Galvanizing one side of a strip of metal |
US3089780A (en) * | 1961-05-04 | 1963-05-14 | United States Steel Corp | Method and composition for shielding steel from molten coating metal |
US3751275A (en) * | 1971-01-26 | 1973-08-07 | A Oken | Inorganic protective coatings |
US4177303A (en) * | 1977-04-22 | 1979-12-04 | Dominion Foundries And Steel, Limited | Method of galvanizing a portion only of a ferrous metal article |
-
1978
- 1978-09-13 BE BE6046604A patent/BE870460A/en not_active IP Right Cessation
-
1979
- 1979-09-06 EP EP79870021A patent/EP0011058A1/en not_active Ceased
- 1979-09-10 CA CA000335257A patent/CA1135573A/en not_active Expired
- 1979-09-12 ZA ZA00794843A patent/ZA794843B/en unknown
- 1979-09-12 US US06/074,723 patent/US4264652A/en not_active Expired - Lifetime
- 1979-09-13 JP JP11685779A patent/JPS5538999A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE70993C (en) * | W. HAGEMANN in Berlin S., Ritterstr. 105 | Process for the production of a one-sided or partial metal coating on metal objects | ||
US3149987A (en) * | 1961-12-11 | 1964-09-22 | Bethlehem Steel Corp | Method of coating metals |
FR1327962A (en) * | 1962-04-27 | 1963-05-24 | United States Steel Corp | Method and composition for protecting steel against deposition of molten coating metal |
FR1443032A (en) * | 1964-08-17 | 1966-06-17 | United States Steel Corp | Process for making galvanized ferrous metal |
DE2446169A1 (en) * | 1974-09-27 | 1976-04-22 | Metallgesellschaft Ag | Protective ceramic coating - for hot dip galvanizing tanks and equipment |
DE2724768A1 (en) * | 1976-06-01 | 1977-12-08 | Kawasaki Steel Co | PROCESS FOR PRODUCING SINGLE-SIDE CLADED STEEL SHEETS OR STRIPS |
Also Published As
Publication number | Publication date |
---|---|
ZA794843B (en) | 1980-09-24 |
JPS5538999A (en) | 1980-03-18 |
BE870460A (en) | 1979-03-13 |
CA1135573A (en) | 1982-11-16 |
US4264652A (en) | 1981-04-28 |
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