WO2017204267A1 - 容器用鋼板 - Google Patents
容器用鋼板 Download PDFInfo
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- WO2017204267A1 WO2017204267A1 PCT/JP2017/019437 JP2017019437W WO2017204267A1 WO 2017204267 A1 WO2017204267 A1 WO 2017204267A1 JP 2017019437 W JP2017019437 W JP 2017019437W WO 2017204267 A1 WO2017204267 A1 WO 2017204267A1
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- film
- steel plate
- plating layer
- plating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
- B32B15/015—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium the said other metal being copper or nickel or an alloy thereof
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D9/00—Electrolytic coating other than with metals
- C25D9/04—Electrolytic coating other than with metals with inorganic materials
- C25D9/08—Electrolytic coating other than with metals with inorganic materials by cathodic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12937—Co- or Ni-base component next to Fe-base component
Definitions
- This disclosure relates to a steel plate for containers.
- a plated steel plate may be used (for example, refer to Patent Documents 1 to 8). And as a container in which the plated steel plate was used, a 2 piece can and a 3 piece can are mentioned, for example.
- a two-piece can is a can body in which a can bottom and a can body are integrated, and a DrD (Draw and Redraw) can, a DI (Drawing and Ironing) can, and the like are known.
- the two-piece can is formed by drawing, ironing, bending / bending, or a combination of these processes.
- Examples of the plated steel sheet used in these cans include tinplate (Sn plated steel sheet) and TFS (Tin Free Steel: electrolytic chromic acid-treated steel sheet), and the plated steel sheets are selectively used depending on the application and processing method. ing.
- 3 piece can is a can body with a can body and a bottom separated.
- Three-piece cans are mainly welded cans that produce can bodies by electric resistance welding.
- TFS is used for the bottom plate of the weld can, and a light-weight Sn-plated steel plate and a Ni-plated steel plate are used for the body of the weld can.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-263696
- Patent Document 2 Japanese Patent Laid-open No. 2000-334886
- Patent Document 3 Japanese Patent No. 3060073
- Patent Document 4 Japanese Patent No. 2998043
- Patent Document 5 Japanese Patent Laid-Open No. 2007-231394
- Patent Document 6 Japanese Patent Laid-Open No. 2000-26992
- Patent Document 7 Japanese Patent Laid-Open No. 2005-149735
- Patent Document 8 Japanese Patent No. 4886811
- the outer surface of the can is printed in order to appeal the commercial value to the consumer.
- the inner surface of the can is coated with a resin in order to ensure corrosion resistance.
- the inner surface side of the can is coated with a spray or the like, and the outer surface side of the can is printed with a curved surface.
- a laminated two-piece can made from a laminated steel plate laminated with a PET film in advance has emerged (see, for example, Patent Document 1 and Patent Document 2).
- the can body was manufactured by welding the steel plate in which the inner surface of the can was coated and the outer surface of the can was printed.
- a PET film that has been printed in advance has been prepared, and a three-piece can using a laminated steel sheet on which such a PET film is laminated has also emerged (for example, Patent Document 3 and (See Patent Document 4).
- the above two-piece can is subjected to drawing processing, ironing processing, bending bending back processing, and the like.
- the three-piece can is subjected to neck processing, flange processing, and, in some cases, expand processing for design. Therefore, the laminated steel sheet is required to have excellent film adhesion that can follow these processes.
- the Sn-plated steel sheet has excellent corrosion resistance even with acidic contents due to the excellent sacrificial anticorrosive action of Sn.
- the fragile Sn oxide exists in the outermost layer of the Sn-plated steel sheet, the film adhesion is unstable. Further, when the Sn-plated steel sheet is processed into the above can, 1) peeling of the film from the Sn-plated steel sheet may occur, and 2) corrosion may occur due to insufficient film adhesion.
- Ni-plated steel sheet that is excellent in workability and film adhesion and can be welded is used as a laminated steel sheet (see, for example, Patent Document 5 above).
- the appearance of the Ni-plated steel sheet is not as glossy as that of the Sn-plated steel sheet, it has also been reported that bright plating is possible depending on the Ni plating method (see, for example, Patent Document 6 and Patent Document 7). .
- the protein contained in these foods is partially decomposed in the heat sterilization process (for example, retort process), and the S component is generated. To do.
- the produced S component is known to combine with Ni to form black NiS (sulfur blackening) and deteriorate the inner surface quality of the can. For this reason, Ni-plated steel sheets have been required to be further improved in resistance to sulfur blackening.
- the present disclosure has been made in view of the above problems, and the object of the present disclosure is to provide a steel plate for containers that has more excellent sulfide blackening resistance, corrosion resistance, adhesion, and weldability. There is.
- Means for solving the above problems include the following aspects.
- a steel plate for containers comprising: a coating or a Zr coating, wherein the Ni plating layer contains 0.1 to 20% by mass of ZnO particles per side in terms of metal Zn content.
- a numerical range expressed using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.
- the term “process” is not limited to an independent process, and may be used as long as the intended purpose of the process is achieved even when it cannot be clearly distinguished from other processes. include.
- the term “steel plate” means a steel plate before applying a Ni plating layer and a chromate film or a Zr film. In the following description, the steel plate before applying the Ni plating layer and the chromate film or the Zr film may be referred to as a “plating original plate”.
- adheresion when simply referred to as adhesion means adhesion including paint adhesion, secondary paint adhesion, and film adhesion.
- the container steel sheet of the present disclosure is a container steel sheet that is excellent in sulfur blackening resistance, corrosion resistance, adhesion, and weldability.
- the steel plate for containers of this indication can be used for a 2 piece can and a 3 piece can, for example. Below, the steel plate for containers of this indication is explained in detail.
- ZnO particles are particles that can collect S, which is the cause of sulfide blackening, as ZnS.
- ZnO particles may be included in the chromate film or Zr film on the Ni plating layer.
- the film thickness of these films is smaller than the average particle diameter of the ZnO particles, the ZnO particles are often exposed from these films. For this reason, it is practically difficult to contain these films. Based on this knowledge, further studies were conducted. As a result, the present inventors improve the resistance to sulfur blackening without impairing the corrosion resistance, adhesion and weldability of Ni plating by controlling the content of ZnO particles in the Ni plating layer. I found.
- the steel plate of the plating base plate used as a base material is not particularly limited.
- a steel plate used as a plating base plate various types of known steel plates manufactured through a normal steel slab manufacturing process, through a normal steel plate manufacturing process (hot rolling, acid tip, cold rolling, annealing, temper rolling, etc.) Steel plates can be used.
- the container steel plate according to the present disclosure is subjected to Ni plating containing ZnO particles on one or both sides of the above-described plating base plate in order to realize better sulfurization blackening resistance, corrosion resistance, adhesion, and weldability. Then, a Ni plating layer is formed. Ni is a metal having both corrosion resistance, adhesion, and weldability.
- the Ni plating layer applied to the steel plate as the plating original plate has a Ni plating amount of 0.3 g / m 2 or more as the amount of metal Ni per one side, so that practical corrosion resistance, adhesion and weldability can be obtained. Demonstrate.
- the Ni plating amount increases, the corrosion resistance, adhesion, and weldability improve with the increase of the Ni plating amount.
- the amount of Ni plating exceeds 3 g / m 2 as the amount of metallic Ni per side, the effect of improving corrosion resistance, adhesion, and weldability is saturated. Therefore, an excessive amount of Ni plating is industrially disadvantageous. Therefore, the Ni plating amount is 0.3 g / m 2 or more and 3 g / m 2 or less in terms of the amount of metallic Ni per one side.
- the amount of Ni plating is preferably 0.5 g / m 2 or more and 2.5 g / m 2 or less, more preferably 0.5 g / m 2 or more and 1.5 g / m 2 in terms of the amount of metallic Ni per side. It is as follows.
- the amount of metallic Ni represents the amount of metallic Ni equivalent.
- ZnO particles are contained, and the ZnO particles are present in a dispersed state in the Ni plating layer.
- the ZnO particles used in the steel plate for containers of the present disclosure are not particularly defined, and known ZnO particles that are commercially available can be used.
- the ZnO particles in the Ni plating layer improve the resistance to sulfur blackening.
- the content of ZnO particles is 0.1% by mass or more in terms of the amount of metal Zn per one surface based on the total mass of the Ni plating layer, the effect of improving the resistance to sulfur blackening is realized.
- the content of ZnO particles in the Ni plating layer is set to 20% by mass or less in terms of the amount of metal Zn per one side.
- the content of ZnO particles in the Ni plating layer is preferably 0.5% by mass to 15% by mass, more preferably 0.5% by mass to 7% by mass in terms of the amount of metal Zn per side. .
- the metal Zn amount represents a metal Zn equivalent amount.
- the size of ZnO particles contained in the Ni plating layer is not particularly specified.
- the size of the ZnO particles may be larger or smaller than the plating thickness of the Ni plating layer. However, if the size of the ZnO particles exceeds the plating thickness of the Ni plating layer, the ZnO particles may peel off during transportation and processing. Therefore, the size of the ZnO particles is preferably not more than the plating thickness of the Ni plating layer, and more preferably not more than half the plating thickness.
- the average particle diameter of the ZnO particles used for forming the Ni plating layer is not particularly limited, and examples thereof include 20 nm to 200 nm.
- grains represents the value computed from the particle diameter distribution obtained by the laser diffraction and scattering method based on ISO13320 and JISZ8825-2 (2001).
- ZnO particles for example, zinc oxide manufactured by Sakai Chemical Industry Co., Ltd. is available as a commercial product.
- the method for providing the Ni plating layer containing the ZnO particles is not particularly specified.
- industrially useful is a method in which cathode electrolysis is performed using a solution in which ZnO particles are dispersed in a known acidic Ni plating solution (for example, an acidic Ni plating solution composed of Ni sulfate and Ni chloride). It is. Moreover, you may add the dispersing agent which prevents aggregation of ZnO particle
- the content rate of ZnO particles contained in the Ni plating layer can be controlled by the content rate of ZnO particles dispersed in the solution.
- the content of ZnO particles contained in the Ni plating layer tends to increase.
- grains contained in Ni plating layer may be disperse
- the aggregate of ZnO particles may be dispersed within a range not exceeding the plating thickness of the Ni plating layer.
- the container steel plate of the present disclosure is subjected to chromate treatment on the upper layer of the Ni plating layer to form a chromate film.
- chromate treatment for example, 1) a chromate film having a single layer structure containing hydrated Cr oxide, or 2) metal Cr is contained in the lower layer (layer on the Ni plating layer side), and the upper layer (surface layer of the steel plate for containers).
- a chromate film having a multilayer structure containing hydrated Cr oxide is applied to the upper layer of the Ni plating layer.
- the metal Cr or hydrated chromium oxide constituting the chromate film has excellent chemical stability. Therefore, the corrosion resistance of the steel plate for containers is improved in proportion to the amount of chromate film. Further, the hydrated Cr oxide exhibits excellent adhesion even in a heated steam atmosphere by performing a strong chemical bond with the functional group of the coating film. Therefore, as the amount of the chromate film attached increases, the adhesion improves. In order to exhibit practically sufficient corrosion resistance and adhesion, it is preferable to provide a chromate film of 1 mg / m 2 or more per side in terms of metal Cr. The effect of improving corrosion resistance and adhesion is also increased by increasing the amount of chromate film.
- the amount of chromate film is preferably 40 mg / m 2 or less per side in terms of metal Cr. More preferably, the adhesion amount of the chromate film is 3 mg / m 2 or more and 20 mg / m 2 or less per side in terms of metal Cr.
- the chromate treatment method includes a treatment method using an aqueous solution of various Cr salts (sodium salt, potassium salt, ammonium salt, etc.).
- the chromate treatment using the various Cr salt aqueous solutions may be performed by any treatment method (immersion treatment, spray treatment, electrolytic treatment, etc.).
- immersion treatment spray treatment, electrolytic treatment, etc.
- cathodic electrolysis treatment on Cr acid in an aqueous solution in which sulfate ion, fluoride ion (including complex ions) or a mixture thereof is added as a plating aid. Is also excellent.
- a Zr film containing a zirconium compound may be formed on the Ni plating layer instead of the chromate film.
- the Zr film is a film containing a Zr compound (oxidized Zr, phosphoric acid Zr, etc.).
- the amount of Zr film is preferably 1 mg / m 2 or more per side in terms of the amount of metal Zr.
- the Zr film is an electrical insulator and has an extremely high electric resistance, it causes deterioration in weldability.
- the amount of Zr film is the amount of metal Zr and exceeds 40 mg / m 2 per side, the above-described deterioration of weldability becomes remarkable, and the appearance is deteriorated. Therefore, the amount of Zr film is preferably 40 mg / m 2 or less per side in terms of the amount of metal Zr.
- the adhesion amount of the Zr film is more preferably 3 mg / m 2 or more and 20 mg / m 2 or less per side in terms of metal Zr amount.
- the metal Zr amount represents a metal Zr equivalent amount.
- the method for applying the Zr film is not particularly specified.
- a method of performing immersion or cathodic electrolysis treatment in an acidic solution (fluorinated Zr, phosphoric acid Zr, or the like) containing hydrofluoric acid as a main component may be used.
- the Ni plating amount, ZnO particle content, chromate film amount, and Zr film amount described above can be measured by, for example, a calibration curve method using fluorescent X-rays.
- the amount of Ni plating will be described.
- a plurality of test pieces with known amounts of metallic Ni are prepared.
- the intensity of fluorescent X-rays derived from Ni is measured in advance from the surface of the Ni plating layer with a fluorescent X-ray apparatus.
- a calibration curve showing the relationship between the measured fluorescence X-ray intensity and the amount of metallic Ni is prepared.
- a test piece is prepared by removing the chromate film or Zr film on the surface of the container steel plate and exposing the Ni plating layer.
- the intensity of fluorescent X-rays derived from Ni is measured on the surface from which the Ni plating layer is exposed, using a fluorescent X-ray apparatus.
- the Ni plating amount per one side can be specified as the metal Ni equivalent amount.
- the ZnO particle content, chromate film amount, and Zr film amount can also be measured in the same manner as the Ni plating amount described above.
- the intensity of fluorescent X-rays derived from the metal elements of Zn of ZnO particles, Cr of chromate film, and Zr of Zr film is measured, and the content of ZnO particles per side is measured by the above calibration curve method.
- the rate, and the amount of the chromate film and the Zr film per side can be measured.
- grains measured the X-ray intensity
- the chromate film amount or the Zr film amount is obtained by measuring the X-ray intensity derived from Cr or Zr on the surface of these films by fluorescent X-rays.
- the average particle diameter (equivalent circle diameter) of the ZnO particles is measured afterwards, cross-sectional SEM (Scanning Electron Microscope) observation or TEM (Transmission Electron Microscope: transmission electron microscope) observation It is possible to measure by. Specifically, the chromate film or the Zr film is removed, and the surface on which the Ni plating layer is exposed is observed with an SEM apparatus, and can be expressed as an average value of equivalent circle diameters of ZnO particles observed in the observation field of view. It is.
- the steel plate for containers according to the present disclosure is a Ni-plated layer that is located on at least one side of the steel plate and the steel plate and has an adhesion amount of 0.3 to 3 g / m 2 per side in terms of Ni, And a Ni plating layer containing 0.1 to 20% by mass of ZnO particles per side, and a chromate film or a Zr film located on the Ni plating layer, and a steel plate, an Ni plating layer and a chromate film or The Zr film may be provided in this order.
- the container steel plate according to the present disclosure has been described in detail above.
- Example shown below is only an example of the steel plate for containers of this indication to the last, and the steel plate for containers of this indication is not limited to the following example.
- test materials were prepared by the method shown in (1) below, and performance evaluation was performed on each item shown in (2) (A) to (F). The obtained results are shown in Table 1 below.
- Test Material Preparation Method-Plated original plate A cold rolled steel plate having a thickness of 0.2 mm and temper grade 3 (T-3) was used as a plated original plate.
- Ni plating conditions A solution containing Ni sulfate at a concentration of 20%, Ni chloride at a concentration of 15%, and boric acid at a concentration of 1% and adjusted to pH 5.5 was prepared. To this solution, ZnO particles having an average particle diameter of 20 nm, 60 nm, 120 nm or 200 nm were added in a solid content of 0.1 to 1%.
- cathodic electrolysis was performed at a current density of 5 A / dm 2 , and Ni plating layers were formed on both surfaces of the steel plate as the plating original plate.
- the amount of Ni adhesion was controlled by adjusting the electrolysis time in the range of 0.1 to 10 seconds.
- ZnO particles ZnO particles manufactured by Sakai Chemical Industry Co., Ltd. were used.
- the average particle diameter of the ZnO particles represents a value calculated from a particle size distribution obtained by a laser diffraction / scattering method based on ISO 13320 and JIS Z 8825-1.
- Chromate treatment conditions cathode electrolysis with a current density of 10 A / dm 2 in a solution containing Cr (VI) oxide with a concentration of 10%, sulfuric acid with a concentration of 0.2%, and ammonium fluoride with a concentration of 0.1% Went. Then, the chromate film
- Ni plating was performed by cathodic electrolysis at a current density of 10 A / dm 2 in a solution containing 5% concentration of Zr fluoride, 4% concentration of phosphoric acid, and 5% concentration of hydrofluoric acid.
- a Zr film was applied to the steel sheet on which the layer was formed.
- the amount of Zr film deposited was controlled by adjusting the electrolysis time in the range of 0.1 to 10 seconds.
- A No blackening is observed.
- B Area ratio of blackened area is over 0% to 1% or less.
- C Blackened area area ratio is over 1% to 5% or less.
- D Blackened area is over 5%.
- (B) Corrosion resistance The test material prepared in (1) was coated with 80 mg / dm 2 of an epoxy-phenol resin, baked at 200 ° C. for 30 minutes, and then a cross cut having a depth reaching the base iron was added. This test material was immersed in a test solution at 45 ° C. composed of a citric acid solution having a concentration of 1.5% and a salt solution having a concentration of 1.5% for 72 hours. After the test material was washed and dried, it was peeled off using an adhesive tape (trade name: Cellophane tape (registered trademark)), and the corrosion state under the coating film in the cross-cut portion and the corrosion state in the flat plate portion were observed. From both evaluations of the width of the under-coating corrosion and the corrosion area ratio of the flat plate portion, the corrosion resistance was evaluated in the following four stages. In addition, evaluation "B" or more was set as the pass among the following four grades of evaluation.
- Corrosion area ratio of flat plate portion is less than 0.2 mm and corrosion area ratio of flat plate portion is 0%
- Corrosion width under coating film is 0.2 mm or more and less than 0.3 mm, and corrosion area ratio of flat plate portion is more than 0% and less than 1%
- C Corrosion width under coating film is 0.3 mm or more and less than 0.45 mm and flat plate portion Corrosion area ratio of more than 1% to 5% or less
- D Corrosion width under coating film of 0.45 mm or more, or corrosion area ratio of flat plate portion exceeding 5%
- A Appropriate current range of secondary current: 1500 A or more B: Appropriate current range of secondary current: 800 A or more and less than 1500 A C: Appropriate current range of secondary current: 100 A or more and less than 800 A D: Secondary current Appropriate current range: less than 100A
- Comparative Example 1 and Comparative Example 12 have deteriorated corrosion resistance due to insufficient Ni amount, and Comparative Example 2 and Comparative Example 10 have inferior sulfur blackening resistance due to low ZnO particle content. Since the comparative example 3 has high ZnO particle content rate, it is inferior to weldability. In Comparative Example 4, the amount of Ni is excessive. Comparative Example 4 is inferior in adhesion because the amount of metallic Cr in the chromate film is insufficient. Since Comparative Example 5 is not provided with a chromate film, the adhesion is poor. Comparative Example 6 is inferior in weldability and adhesion due to excessive ZnO particle content.
- Comparative Example 7 Since the Zr film
- Ni amount (amount as metal Ni amount), ZnO content (content of ZnO particles as metal Zn amount), chromate film amount (amount as metal Cr amount), and Zr film amount (metal Zr)
- the amount as a quantity was measured by the method using fluorescent X-rays described above. Further, these amounts indicate the amount per one side.
- the numerical value with an underline represents that it is outside the range of the steel plate for containers of this indication.
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Abstract
Description
特許文献2:特開2000-334886号公報
特許文献3:特許第3060073号公報
特許文献4:特許第2998043号公報
特許文献5:特開2007-231394号公報
特許文献6:特開2000-26992号公報
特許文献7:特開2005-149735号公報
特許文献8:特許第4886811号公報
従来の2ピース缶は、缶体の成形を行った後に、缶内面側にはスプレー等で塗装が施され、缶外面側には曲面印刷が施されていた。しかし、近年は、予めPETフィルムをラミネートしたラミネート鋼板から製缶されたラミネート2ピース缶が台頭している(例えば、特許文献1及び特許文献2を参照。)。
また、溶接缶においても、従来は、缶内面には塗装が施され、かつ、缶外面には印刷が施された鋼板が溶接されることで、缶体が製造されていた。しかし、近年は、塗装の代わりに予め印刷が施されたPETフィルムを準備し、かかるPETフィルムがラミネートされたラミネート鋼板を用いた3ピース缶も台頭している(例えば、以下の特許文献3及び特許文献4を参照。)。
(1)鋼板と、前記鋼板の少なくとも片面に位置し、付着量が、金属Ni量で片面当たり0.3~3g/m2であるNiめっき層と、前記Niめっき層上に位置する、クロメート皮膜又はZr皮膜と、を備え、前記Niめっき層が、金属Zn量で片面当たり0.1~20質量%のZnO粒子を含有する、容器用鋼板。
(2)前記Niめっき層が、金属Zn量で片面当たり0.5~15質量%のZnO粒子を含有する、(1)に記載の容器用鋼板。
(3)前記クロメート皮膜が、金属Cr量で片面当たり1~40mg/m2のCrを含有する、(1)又は(2)に記載の容器用鋼板。
(4)前記Zr皮膜が、金属Zr量で片面当たり1~40mg/m2のZrを含有する、(1)又は(2)に記載の容器用鋼板。
本明細書において、「工程」との用語は、独立した工程だけではなく、他の工程と明確に区別できない場合であってもその工程の所期の目的が達成されるのであれば、本用語に含まれる。
本明細書において、「鋼板」との用語は、Niめっき層と、クロメート皮膜又はZr皮膜とを施す前の鋼板を意味する。なお、以下の説明において、Niめっき層と、クロメート皮膜又はZr皮膜とを施す前の鋼板を「めっき原板」と称する場合がある。
本明細書において、「容器用鋼板」は、Niめっき層と、クロメート皮膜又はZr皮膜とを施した後の鋼板を意味する。
本明細書において、単に密着性と称する場合、「密着性」との用語は、塗料密着性、二次塗料密着性、およびフィルム密着性を含めた密着性を意味する。
本発明者らは、上記課題に対応するために鋭意検討を行った。その結果、本発明者らは、ZnO粒子を、Niめっき層中へ分散及び含有させることで、硫化黒変を防止できるとの知見を得た。
なお、ZnO粒子は、Niめっき層上のクロメート皮膜またはZr皮膜に含有させることも考えられる。しかしながら、これらの皮膜の膜厚は、ZnO粒子の平均粒径よりも小さいため、ZnO粒子が、これらの皮膜から露出してしまうことが多い。このため、これらの皮膜へ含有させることは現実的に困難である。
かかる知見のもと、更なる検討を行った。その結果、本発明者らは、Niめっき層中のZnO粒子の含有率を制御することで、Niめっきが有する耐食性、密着性、および溶接性を損なうことなく、耐硫化黒変性を向上させることを見出した。
本開示の容器用鋼板において、母材として使用されるめっき原板の鋼板は、特に限定されるものではない。めっき原板として使用される鋼板として、通常の鋼片製造工程から、通常の鋼板製造工程(熱間圧延、酸先、冷間圧延、焼鈍、調質圧延等)を経て製造された公知の各種の鋼板が使用可能である。
本開示の容器用鋼板は、より優れた耐硫化黒変性、耐食性、密着性及び溶接性を実現するために、上記のめっき原板の片面又は両面に対して、ZnO粒子を含有したNiめっきが施され、Niめっき層が形成される。Niは、耐食性、密着性、及び、溶接性を併せ持つ金属である。そして、めっき原板としての鋼板に施したNiめっき層は、Niめっき量が、片面当たりの金属Ni量として0.3g/m2以上となることで、実用的な耐食性、密着性及び溶接性を発揮する。更にNiめっき量が増加すると、Niめっき量の増加に伴い耐食性、密着性、及び溶接性が向上する。一方、Niめっき量が、片面当たりの金属Ni量として3g/m2を超えると、耐食性、密着性、及び溶接性の向上効果が飽和する。そのため、過剰のNiめっき量は工業的には不利益である。従って、Niめっき量は、片面当たりの金属Ni量で、0.3g/m2以上3g/m2以下とする。Niめっき量は、好ましくは、片面当たりの金属Ni量で、0.5g/m2以上2.5g/m2以下であり、更に好ましくは、0.5g/m2以上1.5g/m2以下である。なお、金属Ni量は、金属Ni換算量を表す。
なお、Niめっき層中に含有するZnO粒子は、単独のZnO粒子が均一に近い状態で分散していてもよい。また、Niめっき層のめっき厚以上にならない範囲でZnO粒子の凝集体が分散していてもよい。
本開示の容器用鋼板は、優れた耐食性及び密着性(特に二次塗料密着性)を確保するために、上記のNiめっき層の上層に、クロメート処理が施され、クロメート皮膜が形成される。かかるクロメート処理により、例えば、1)水和酸化Crを含有する単層構造のクロメート皮膜、又は、2)下層(Niめっき層側の層)に金属Crを含有し、上層(容器用鋼板の表層側の層)に水和酸化Crを含有する複層構造のクロメート皮膜が、Niめっき層の上層に付与される。
本開示の容器用鋼板は、上記のNiめっき層の上層に、上記のクロメート皮膜に代えて、ジルコニウム化合物を含有するZr皮膜が形成されていてもよい。Zr皮膜は、Zr化合物(酸化Zr、リン酸Zr等)を含有する皮膜のことである。Zr皮膜は、上記のクロメート皮膜と同じ機構により、密着性及び耐食性の飛躍的な向上が認められる。実用上、十分な耐食性及び密着性を発揮させるには、Zr皮膜量は、金属Zr量で、片面当たり1mg/m2以上とすることが好ましい。一方、Zr皮膜は、電気的に絶縁体であることから電気抵抗が非常に高いため、溶接性を劣化させる要因となる。Zr皮膜量は、金属Zr量で、片面当たり40mg/m2を超えると、上記のような溶接性の劣化が顕著となり、また、外観性が劣化する。従って、Zr皮膜量は、金属Zr量で、片面当たり40mg/m2以下とすることが好ましい。Zr皮膜の付着量は、より好ましくは、金属Zr量で、片面当たり3mg/m2以上20mg/m2以下である。なお、金属Zr量は、金属Zr換算量を表す。
なお、以上述べたNiめっき量、ZnO粒子の含有率、クロメート皮膜量、及び、Zr皮膜量は、例えば蛍光X線による検量線法で測定することが可能である。
例えばNiめっき量について説明する。まず、付与された金属Ni量が既知である複数の試験片を準備する。次に、各試験片について、蛍光X線装置により、Niめっき層の表面から、Niに由来する蛍光X線の強度を事前に測定する。そして、測定した蛍光X線の強度と金属Ni量との関係を示した検量線を準備しておく。その上で、着目している容器用鋼板について、容器用鋼板表面のクロメート皮膜またはZr皮膜を除去し、Niめっき層を露出させた試験片を準備する。このNiめっき層を露出させた表面を蛍光X線装置により、Niに由来する蛍光X線の強度を測定する。得られた蛍光X線強度と予め準備した検量線とを利用することで、片面当たりのNiめっき量を、金属Ni換算量として、特定することができる。
ZnO粒子の含有率、クロメート皮膜量、及び、Zr皮膜量についても、上記で説明したNiめっき量と同様にして測定できる。具体的には、ZnO粒子のZn、クロメート皮膜のCr、及びZr皮膜のZrの各金属元素に由来する蛍光X線の強度を測定し、上記の検量線法により、片面当たりのZnO粒子の含有率、並びに、片面当たりのクロメート皮膜およびZr皮膜の皮膜量を測定することができる。
なお、ZnO粒子の含有率は、Niめっき量の測定と同様に、クロメート皮膜またはZr皮膜を除去し、Niめっき層を露出させた表面を蛍光X線により、Znに由来するX線強度を測定する。また、クロメート皮膜量またはZr皮膜量は、これら皮膜表面を蛍光X線により、CrまたはZrに由来するX線強度を測定する。
以上、本開示の容器用鋼板について、詳細に説明した。
・めっき原板:板厚0.2mm、テンパーグレード3(T-3)の冷延鋼板を、めっき原板として使用した。
・Niめっき条件:濃度20%の硫酸Ni、濃度15%の塩化Ni、及び、濃度1%のホウ酸を含有し、pH5.5に調整した溶液を準備した。この溶液に対し、平均粒径20nm、60nm、120nm又は200nmのZnO粒子を固形分で0.1~1%添加した。かかる溶液を利用して、電流密度5A/dm2で陰極電解を行い、めっき原板である鋼板の両面にNiめっき層を形成した。Ni付着量は、電解時間を0.1~10秒の範囲で調整することで、制御した。
なお、ZnO粒子は、堺化学工業社製のZnO粒子を用いた。また、上記のZnO粒子の平均粒径は、ISO13320およびJIS Z 8825-1に準拠したレーザ回折・散乱法で得られた粒子径分布から算出した値を表す。
(A)耐硫化黒変性
(1)で作製した試験材に、エポキシ-フェノール樹脂を70mg/dm2塗布し、200℃、30分で焼付けた後、0.6%システイン塩酸塩溶液に130℃、2時間浸漬した(耐硫化黒変性1)。
また、エポキシ-フェノール樹脂を70mg/dm2塗布して上記条件で焼付けた後、0.6%システイン塩酸塩溶液に130℃、2時間浸漬し、この浸漬を2回行った(耐硫化黒変性2)。
耐硫化黒変性1および耐硫化黒変性2について、黒変状況を、以下に示す4段階で判断し、耐硫化黒変性を評価した。なお、以下の4段階の評価のうち、評価「B」以上を合格とした。
B:黒変部の面積率0%超1%以下
C:黒変部の面積率1%超5%以下
D:黒変部の面積率5%超
(1)で作製した試験材に、エポキシ-フェノール樹脂を80mg/dm2塗布し、200℃、30分で焼付けた後、地鉄に達する深さのクロスカットを入れた。かかる試験材を、濃度1.5%のクエン酸-濃度1.5%の食塩混合液からなる45℃の試験液に72時間浸漬した。試験材の洗浄及び乾燥後、粘着テープ(商品名:セロハンテープ(登録商標))を用いて剥離を行い、クロスカット部の塗膜下腐食状況と平板部の腐食状況とを観察した。塗膜下腐食の幅及び平板部の腐食面積率の両評価から、以下の4段階で判断し、耐食性を評価した。なお、以下の4段階の評価のうち、評価「B」以上を合格とした。
B:塗膜下腐食幅0.2mm以上0.3mm未満、かつ、平板部の腐食面積率0%超1%以下
C:塗膜下腐食幅0.3mm以上0.45mm未満、かつ、平板部の腐食面積率1%超5%以下
D:塗膜下腐食幅0.45mm以上、又は、平板部の腐食面積率5%超
(1)で作製した試験材の両面に、厚さ20μmのPETフィルムを200℃でラミネートし、ラミネートした試験材を直径150mmに打ち抜いた。その後、フィルム側を内面に、絞り加工及びしごき加工による製缶加工を行い、直径66mm、高さ120mmのDI缶を作製した。フィルムの疵、浮き、剥離を観察し、これらの面積率から加工性を4段階で評価した。なお、以下の4段階の評価のうち、評価「B」以上を合格とした。
B:フィルムの疵、浮き、剥離の面積率が0%超0.5%以下
C:フィルムの疵、浮き、剥離の面積率が0.5%超15%以下
D:フィルムの疵、浮き、剥離の面積率が15%超、又は、破断し加工不能
ワイヤーシーム溶接機を用い、溶接ワイヤースピード80m/分の条件で電流を変更して、(1)で作製した試験材を溶接した。十分な溶接強度が得られる最小電流値と、溶接欠陥(チリ及び溶接スパッタなど)が目立ち始める最大電流値とからなる適正電流範囲の広さから総合的に判断し、溶接性を以下の4段階で評価した。なお、以下の4段階の評価のうち、評価「B」以上を合格とした。
B:二次側電流の適正電流範囲:800A以上1500A未満
C:二次側電流の適正電流範囲:100A以上800A未満
D:二次側電流の適正電流範囲:100A未満
(1)で作製した試験材に、エポキシ-フェノール樹脂を70mg/dm2塗布し、200℃、30分の条件で焼付けた後、1mm間隔で地鉄に達する深さのクロスカットを入れた。その後、粘着テープ(商品名:セロハンテープ(登録商標))を用いて塗膜を剥離し、剥離状況を観察した。剥離面積率から、塗料密着性を以下の4段階で評価した。なお、以下の4段階の評価のうち、評価「B」以上を合格とした。
B:剥離面積率:0%超5%以下
C:剥離面積率:5%超30%以下
D:剥離面積率:30%超
(1)で作製した試験材に、エポキシ-フェノール樹脂を70mg/dm2塗布し、200℃、30分の条件で焼付けた後、1mm間隔で地鉄に達する深さのクロスカットを入れた。その後、125℃、30分の条件で、加熱水蒸気雰囲気による処理(レトルト処理)を行った。乾燥後、粘着テープ(商品名:セロハンテープ(登録商標))を用いて塗膜を剥離し、剥離状況を観察した。剥離面積率から、二次塗料密着性を以下の4段階で評価した。なお、以下の4段階の評価のうち、評価「B」以上を合格とした。
B:剥離面積率:0%超5%以下
C:剥離面積率:5%超30%以下
D:剥離面積率:30%超
(1)で作製した試験材の両面に、厚さ20μmのPETフィルムを200℃でラミネートし、ラミネートした試験材を直径150mmに打ち抜いた。その後、フィルム側を内面に絞りしごき加工を行って、直径66mm、高さ120mmのDI缶を作製した。その後、125℃、30分の条件でレトルト処理を行い、フィルムの剥離状況を観察した。剥離面積率から、フィルム密着性を以下の4段階で評価した。なお、以下の4段階の評価のうち、評価「B」以上を合格とした。
B:剥離面積率:0%超2%以下
C:剥離面積率:2%超10%以下
D:剥離面積率:10%超
比較例1および比較例12は、Ni量不足のため、耐食性が劣化しており、比較例2および比較例10は、ZnO粒子含有率が低いため、耐硫化黒変性に劣っている。比較例3は、ZnO粒子含有率が高いため、溶接性に劣っている。比較例4は、Ni量過多となっている。また、比較例4はクロメート皮膜の金属Cr量が不足しているために、密着性に劣っている。比較例5は、クロメート皮膜が設けられていないために、密着性に劣っている。比較例6は、ZnO粒子含有率が過多のために、溶接性及び密着性に劣っている。比較例7は、Zr皮膜が設けられていないために、耐食性及び密着性に劣っている。比較例8および比較例11は、Ni量不足及び低ZnO粒子含有率のため、耐硫化黒変性、耐食性、溶接性、密着性に劣っている。比較例9は、Ni量過多となっている。また、比較例9はZr皮膜の金属Zr量が不足しているために、耐食性及び密着性に劣っている。
表1において、下線が付されている数値は、本開示の容器用鋼板の範囲外であることを表す。
本明細書に記載された全ての文献、特許出願、および技術規格は、個々の文献、特許出願、および技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書中に参照により取り込まれる。
Claims (4)
- 鋼板と、前記鋼板の少なくとも片面に位置し、付着量が、金属Ni量で片面当たり0.3~3g/m2であるNiめっき層と、
前記Niめっき層上に位置する、クロメート皮膜又はZr皮膜と、
を備え、
前記Niめっき層が、金属Zn量で片面当たり0.1~20質量%のZnO粒子を含有する、容器用鋼板。 - 前記Niめっき層が、金属Zn量で片面当たり0.5~15質量%のZnO粒子を含有する、請求項1に記載の容器用鋼板。
- 前記クロメート皮膜が、金属Cr量で片面当たり1~40mg/m2のCrを含有する、請求項1又は2に記載の容器用鋼板。
- 前記Zr皮膜が、金属Zr量で片面当たり1~40mg/m2のZrを含有する、請求項1又は2に記載の容器用鋼板。
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JP2020100870A (ja) * | 2018-12-21 | 2020-07-02 | 日本製鉄株式会社 | 容器用鋼板 |
JP7435924B1 (ja) | 2022-11-24 | 2024-02-21 | Jfeスチール株式会社 | 表面処理鋼板およびその製造方法 |
JP7435925B1 (ja) | 2022-11-24 | 2024-02-21 | Jfeスチール株式会社 | 表面処理鋼板およびその製造方法 |
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JP7435925B1 (ja) | 2022-11-24 | 2024-02-21 | Jfeスチール株式会社 | 表面処理鋼板およびその製造方法 |
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