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
  • C23C2/36—Elongated material
  • C23C2/40—Plates; Strips
• • 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
• • 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
  • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
  • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
  • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
  • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C18/00—Alloys based on zinc
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C18/00—Alloys based on zinc
  • C22C18/04—Alloys based on zinc with aluminium as the next major constituent
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
  • C23C2/026—Deposition of sublayers, e.g. adhesion layers or pre-applied alloying elements or corrosion protection
• • 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
  • C23C2/26—After-treatment
• • 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
  • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
  • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
  • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
  • C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
  • C23C22/42—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also phosphates
• • 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
  • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
  • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
  • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
  • C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
  • C23C22/44—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also fluorides or complex fluorides
• • 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
  • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
  • C23C22/78—Pretreatment of the material to be coated
• • 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
• • 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
• • 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
  • C23C28/025—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 with at least one zinc-based layer
• • 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
  • C23C28/3225—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 with at least one zinc-based layer
• • 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
  • B32B2250/00—Layers arrangement
  • B32B2250/02—2 layers
• • 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
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/732—Dimensional properties
  • B32B2307/737—Dimensions, e.g. volume or area
  • B32B2307/7375—Linear, e.g. length, distance or width
  • B32B2307/7376—Thickness
• • 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
  • B32B2311/00—Metals, their alloys or their compounds
  • B32B2311/20—Zinc
• • 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
  • B32B2311/00—Metals, their alloys or their compounds
  • B32B2311/30—Iron, e.g. steel
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
  • C23C2/06—Zinc or cadmium or alloys based thereon
• • 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
  • C23C2/26—After-treatment
  • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath

Definitions

• the present disclosure relates to a plated striped steel sheet.
• a striped steel plate is a steel plate that has continuous anti-slip protrusions (i.e. protrusions) on its surface by rolling.
• continuous anti-slip protrusions i.e. protrusions
• convex portions having a certain width, a certain length, and a certain height are provided at a certain angle and at a certain pitch with respect to the rolling direction.
• striped steel sheets are manufactured by hot rolling. Striped steel plates are used for the floorboards or steps of large vehicles (buses, trucks, etc.), the floorboards of multi-story parking lots, the floorboards of factories, the decks of ships, temporary scaffolding or stairs at construction sites, and the like.
• Patent Document 1 states, ⁇ In a method of coating a decorative surface of a base material with a roll coater, the decorative surface of the base material is an uneven surface having an uneven pattern, and at least the surface of the coating roller of the roll coater is made of an elastic material.
• a coating method characterized in that the coating roller is rotated substantially in synchronization with the transport speed of the substrate, and the coating roller is brought into contact with the uneven surface with a pressing force.
• a chemical conversion coating layer is formed on the striped steel plate for the purpose of suppressing primary rust prevention defects.
• striped steel plates have convex and flat areas, so the thickness of the chemical conversion coating layer between the convex and flat areas may become uneven, resulting in poor primary rust prevention. .
• an object of the present disclosure is to provide a plated striped steel sheet that suppresses primary rust prevention defects.
• ⁇ 2> The plated striped steel sheet according to ⁇ 1>, wherein the film thickness ratio of the chemical conversion coating layer between the flat portion and the convex portion of the base striped steel sheet is 0.4 or more and 1.5 or less.
• the film thickness ratio of the chemical conversion coating layer between the flat part and the convex part of the base striped steel plate is 0.2 or more and less than 0.8, or 1.5 or more and 5.0 or less ⁇ 1> or ⁇
• FIG. 2 is a schematic plan view showing an example of a base striped steel sheet of the plated striped steel sheet of the present disclosure.
• 1A is a schematic cross-sectional view showing an example of a base striped steel sheet of the plated striped steel sheet of the present disclosure, and is a schematic cross-sectional view taken along line GG in FIG. 1A.
• FIG. 1A is a schematic cross-sectional view showing an example of a base striped steel sheet of the plated striped steel sheet of the present disclosure, and is a schematic cross-sectional view taken along line FF in FIG. 1A.
• FIG. 2 is a schematic diagram showing an example of a coating device used in the method for manufacturing a plated striped steel sheet of the present disclosure.
• FIG. 2 is a schematic diagram showing an example of a grooved applicator roll used in the method for manufacturing a plated striped steel sheet of the present disclosure.
• the content of each element in the chemical composition is expressed as “%”, meaning “mass %”.
• a numerical range expressed using “ ⁇ ” means a range that includes the numerical values written before and after " ⁇ ” as lower and upper limits.
• a numerical range in which "more than” or “less than” is attached to the numerical value written before and after “ ⁇ ” means a range that does not include these numerical values as the lower limit or upper limit.
• the content of elements in a chemical composition is sometimes expressed as element concentration (for example, Zn concentration, Mg concentration, etc.).
• the plated striped steel sheet of the present disclosure includes a base striped steel plate having a convex portion and a flat portion on one plate surface, and a zinc-based alloy disposed on the plate surface having the convex portions and flat portions of the base striped steel plate. It has a plating layer including a layer, and a chemical conversion coating layer provided on the surface of the plating layer.
• the thickness of the chemical conversion coating layer on the flat part of the base striped steel plate is 0.10 to 5.00 ⁇ m per side.
• the film thickness ratio of the chemical conversion coating layer on the flat part and the convex part of the base striped steel plate is 0.20 to 5. It is 00.
• the plated striped steel sheet of the present disclosure becomes a plated striped steel sheet that suppresses primary rust prevention defects.
• the base striped steel plate is a steel plate on which a plating layer is formed.
• the base striped steel plate has a convex portion and a flat portion on one plate surface.
• the height of the convex portions of the base striped steel plate (that is, the stripe height) is 3.0 mm or less.
• the height of the convex portion of the base striped steel plate is within the above range.
• the height of the convex portion of the base striped steel plate is preferably 2.5 mm or less.
• the lower limit of the height of the convex portion of the base striped steel plate is, for example, 0.5 mm or more.
• the height of the convex part of the base striped steel plate is the height of the central part in the length direction and the central part in the width direction of the convex part (see H in FIGS. 1B and 1C).
• FIGS. 1A to 1C Other shapes of the striped steel plate are as shown in FIGS. 1A to 1C, for example.
• A, B, C, D, and E are as follows, respectively.
• A: Arrangement angle of convex portions (angle of length direction of convex portions with respect to rolling direction) 35 to 55° (preferably 40 to 50°)
• B: Length of convex portion 15 to 50 mm (preferably 20 to 40 mm).
• the base striped steel plate is usually given a convex shape by hot rolling.
• the steel type of the base striped steel plate is not particularly limited. Examples of the base striped steel plate include steel types corresponding to rolled steel for general structures defined in JIS G3101:2015.
• the convex shape of the base striped steel sheet is imparted, for example, by transferring the concave shape formed on the working roll onto the surface of the steel sheet during the finishing stage of hot rolling. Note that the plate surface on the opposite side in the thickness direction of the plate surface on which the convex portions and flat portions are provided is a surface having the surface texture of a normal steel plate.
• the plate surface on the opposite side in the thickness direction of the plate surface on which the convex portions and flat portions are provided is, for example, at the stage of finishing hot rolling, where the convex portions and flat portions are provided.
• This is a plate surface provided by a normal rolling roll (that is, a roll having normal roughness) facing the roll.
• the base striped steel plate may be a pre-plated striped steel plate.
• the pre-plated striped steel sheet is obtained, for example, by an electrolytic treatment method or a displacement plating method.
• a pre-plated striped steel sheet is obtained by immersing a base striped steel sheet in a sulfuric acid bath or a chloride bath containing metal ions of various pre-plating components and subjecting it to electrolytic treatment.
• a pre-plated striped steel sheet is obtained by immersing a base striped steel sheet in an aqueous solution containing metal ions of various pre-plating components and having its pH adjusted with sulfuric acid to cause metal to be precipitated by displacement.
• a representative example of the pre-plated striped steel plate is a pre-Ni plated striped steel plate.
• the plating layer includes a zinc-based alloy layer.
• the amount of the plating layer deposited is preferably 60 to 500 g/m 2 per side. Corrosion resistance can be ensured more reliably when the amount of the plating layer is 60 g/m 2 or more. On the other hand, when the amount of plating layer deposited is 500 g/m 2 or less, appearance defects such as sagging patterns of the plating layer can be suppressed. Therefore, the amount of the zinc-based plating layer to be deposited is within the above range. From the viewpoint of improving corrosion resistance, the amount of the plating layer deposited is more preferably 90 to 460 g/m 2 , even more preferably 100 to 400 g/m 2 .
• the amount of plating layer adhered is measured as follows. A sample of 50 mm x 50 mm is cut out from a plated striped steel plate to be measured, and the plate surface on which the convex portions and flat portions are provided and the opposite plate surface facing in the plate thickness direction are sealed with tape. Thereafter, the sample is immersed in hydrochloric acid containing an inhibitor that suppresses dissolution of iron to dissolve the plating on the plate surface where the convex portions and flat portions are provided. The weight difference before and after dissolution is divided by the area of the sample (50 mm x 50 mm) to calculate the amount of plating attached. Perform this three times and take the average value.
• the zinc-based alloy layer is an alloy layer containing zinc and aluminum. Further, it may contain one or more elements selected from the group consisting of magnesium and silicon.
• the zinc-based alloy layer may be a well-known zinc-based alloy such as a zinc-aluminum alloy layer, a zinc-aluminum-magnesium alloy layer, a zinc-aluminum-magnesium-silicon alloy layer, or a zinc-aluminum-silicon alloy layer. Examples include layers.
• a zinc-based alloy layer is a plating layer containing small amounts of cobalt, molybdenum, tungsten, nickel, titanium, calcium, chromium, manganese, iron, lead, bismuth, antimony, tin, copper, cadmium, arsenic, etc. as additive elements or impurities. But that's fine.
• the zinc-based alloy layer is preferably an alloy layer containing zinc, aluminum, and magnesium from the viewpoint of corrosion resistance.
• the plating layer may include an Al--Fe alloy layer in addition to the zinc-based alloy layer.
• the Al--Fe alloy layer is arranged between the base striped steel sheet and the zinc-based alloy layer.
• the plating layer may have a single layer structure of a zinc-based alloy layer, or may have a laminated structure including a zinc-based alloy layer and an Al--Fe alloy layer.
• the zinc-based alloy layer constitutes the surface of the plating layer.
• an oxide film of the elements constituting the plating layer is formed on the surface of the plating layer to a thickness of about 50 nm, it is considered that it is thinner than the overall thickness of the plating layer and does not constitute the main part of the plating layer.
• the Al-Fe alloy layer may be formed on the surface of the base striped steel sheet (specifically, between the base striped steel sheet and the zinc-based plating layer), and is a layer whose main phase is the Al 5 Fe phase as a structure. .
• the Al--Fe alloy layer is formed by mutual atomic diffusion between the striped steel sheet and the plating bath.
• the plating layer is formed by a hot-dip plating method, so an Al--Fe alloy layer is likely to be formed in the plating layer containing the Al element. Since the plating bath contains Al at a certain concentration or more, the Al 5 Fe phase is formed in the largest amount.
• the Al--Fe alloy layer may partially contain a small amount of AlFe phase, Al 3 Fe phase, Al 5 Fe 2 phase, etc. Furthermore, since the plating bath also contains Zn at a certain concentration, the Al--Fe alloy layer also contains a small amount of Zn.
• Si when Si is contained in the plating layer, Si is particularly easily incorporated into the Al--Fe alloy layer and may become an Al--Fe--Si intermetallic compound phase.
• the intermetallic compound phase identified is the AlFeSi phase, and the isomers include ⁇ , ⁇ , q1, q2-AlFeSi phases, etc. Therefore, these AlFeSi phases may be detected in the Al--Fe alloy layer.
• the Al--Fe alloy layer containing these AlFeSi phases is also referred to as an Al--Fe--Si alloy layer. Note that since the Al--Fe--Si alloy layer is also thinner than the plating layer, its influence on the corrosion resistance of the entire plating layer is small.
• the structure of the Al--Fe alloy layer may change depending on the amount of pre-plating. Specifically, if the pure metal layer used for pre-plating remains around the Al-Fe alloy layer, an intermetallic compound phase in which the constituent components of the plating layer and the pre-plating components are combined (for example, a pre-Ni-plated striped steel sheet) (Al3Ni phase, etc.) forms an alloy layer, an Al-Fe alloy layer in which some of the Al atoms and Fe atoms are substituted, or a part of the Al atoms, Fe atoms, and Si atoms.
• an intermetallic compound phase in which the constituent components of the plating layer and the pre-plating components are combined for example, a pre-Ni-plated striped steel sheet) (Al3Ni phase, etc.) forms an alloy layer, an Al-Fe alloy layer in which some of the Al atoms and Fe atoms are substituted, or a part of the Al atoms, Fe atoms, and
• an Al--Fe--Si alloy layer is formed in which .
• these alloy layers are also smaller in thickness than the Zn--Al--Mg alloy layer, their influence on the corrosion resistance of the entire plating layer is small.
• the plating layer is, for example, mass%, Al: more than 0.1% to less than 25.0%, Mg: 0% to less than 12.5%, Sn: 0% to 5.0%, Bi: 0% to less than 5.0%, In: 0% to less than 2.0%, Ca: 0% to 3.00%, Y: 0% to 0.5%, La: 0% to less than 0.5%, Ce: 0% to less than 0.5%, Si: 0% to less than 2.5%, Cr: 0% to less than 0.25%, Ti: 0% to less than 0.25%, Zr: 0% to less than 0.25%, Mo: 0% to less than 0.25%, W: 0% to less than 0.25%, Ag: 0% to less than 0.25%, P: 0% to less than 0.25%, Ni: 0% to less than 0.25%, Co: 0% to less than 0.25%, V: 0% to less than 0.25%, Nb: 0% to less than 0.25%, Cu: 0% to less than 0.25%, Mn: 0% to less
• the chemical composition of the plating layer includes Mg, Sn, Bi, In, Ca, Y, La, Ce, Si, Cr, Ti, Zr, Mo, W, Ag, P, Ni, Co, V, Nb, Cu, Mn.
• Li, Na, K, Fe, Sr, Sb, Pb, and B are optional components. In other words, these elements do not need to be included in the plating layer.
• the chemical composition of the plating layer is the average chemical composition of the entire plating layer (if the plating layer has a single layer structure of a zinc-based alloy layer, the average chemical composition of the zinc-based alloy layer, - In the case of a stacked structure of Fe alloy layers, the total average chemical composition of the zinc-based alloy layer and the Al--Fe alloy layer).
• the chemical composition of the zinc-based alloy layer is almost the same as the chemical composition of the plating bath because the reaction for forming the plating layer is completed within the plating bath. Furthermore, in the hot-dip plating method, an Al--Fe alloy layer is formed and grows instantly immediately after immersion in a plating bath. The formation reaction of the Al--Fe alloy layer has been completed in the plating bath, and its thickness is often sufficiently smaller than that of the zinc-based alloy layer. Therefore, unless special heat treatment such as heat alloying treatment is performed after plating, the average chemical composition of the entire plating layer is substantially equal to the chemical composition of the zinc-based alloy layer, ignoring the components of the Al-Fe alloy layer. can do.
• the chemical components of the plating layer are measured by the following method. First, an acid solution is obtained by removing and dissolving the plating layer with an acid containing an inhibitor that suppresses corrosion of the base striped steel plate. Next, by measuring the obtained acid solution by ICP analysis, the chemical composition of the plating layer (if the plating layer has a single layer structure of a zinc-based alloy layer, the chemical composition of the zinc-based alloy layer, and the chemical composition of the plating layer with Al- In the case of a laminated structure of an Fe alloy layer and a zinc-based alloy layer, a total chemical composition of the Al--Fe alloy layer and the zinc-based alloy layer can be obtained.
• the components of the pre-plating are also detected.
• ICP analysis detects not only Ni in the plating layer but also Ni in the pre-Ni plating.
• a pre-plated striped steel sheet with a Ni coating amount of 1 g/m 2 to 3 g/m 2 is used as a base striped steel sheet, even if the Ni concentration contained in the plating layer is 0%, The Ni concentration is detected as 0.1 to 15%.
• the method for determining whether the base striped steel sheet is a pre-plated striped steel sheet is as follows.
• a sample is taken from the target plated striped steel plate, with a cross section cut along the thickness direction of the plated striped steel plate serving as the measurement surface.
• Line analysis is performed on the measurement surface of the sample near the interface between the plating layer and the base striped steel sheet in the plated striped steel sheet using an electron probe microanalyzer (FE-EPMA) to measure the Ni concentration.
• the measurement conditions were an acceleration voltage of 15 kV, a beam diameter of about 100 nm, an irradiation time of 1000 ms per point, and a measurement pitch of 60 nm.
• the measurement distance may be any distance that allows confirmation of whether or not the Ni concentration is concentrated at the interface between the plating layer and the base striped steel sheet in the plated striped steel sheet. If the Ni concentration is concentrated at the interface between the plating layer and the base striped steel sheet in the plated striped steel sheet, the base striped steel sheet is determined to be the pre-plated striped steel sheet.
• the Ni concentration of the plating layer is defined as a value measured as follows. First, using a high-frequency glow discharge luminescent surface analyzer (GDS: manufactured by Horiba, model number: GD-Profiler2), three or more types of standard samples (Zn alloy standard samples manufactured by BAS, IMN ZH1, ZH2, and ZH4) with different Ni concentrations were analyzed. The luminescence intensity of Ni is measured. A calibration curve is prepared from the relationship between the obtained Ni luminescence intensity and the Ni concentration of the standard sample. Next, we used a high-frequency glow discharge luminescent surface analyzer (GDS: manufactured by Horiba, model number: GD-Pr).
• GDS high-frequency glow discharge luminescent surface analyzer
• the luminescence of Ni at the 1/2 film thickness position of the plating layer of the plated striped steel sheet to be measured (the sheet surface opposite in the sheet thickness direction to the sheet surface on which the convex portions and flat portions are provided). Measure intensity.
• the Ni concentration at the 1/2 position of the plating layer is determined from the obtained Ni emission intensity and the prepared calibration curve.
• the Ni concentration at the obtained 1/2 position of the plating layer is defined as the Ni concentration of the plating layer.
• the Zn concentration of the plating layer is defined as the Zn concentration calculated from the following formula.
• Zn concentration 100 - (element concentration other than Zn and Ni determined by ICP analysis + Ni concentration determined by GDS)
• the measurement conditions of the high frequency glow discharge luminescent surface analyzer are as follows. ⁇ H. V. :630V ⁇ Anode diameter: ⁇ 4mm ⁇ Gas: Ar ⁇ Gas pressure: 600Pa ⁇ Output: 35W
• the thickness of the chemical conversion coating layer on the flat part of the base striped steel plate is 0.10 to 5.00 ⁇ m per side. If the thickness of the chemical conversion coating layer in the flat area is thin, white rust will occur locally, resulting in poor primary rust prevention. If the thickness of the chemical conversion coating layer in the flat portion is large, cracks will occur in the chemical conversion coating layer, resulting in poor primary rust prevention. Therefore, the thickness of the chemical conversion coating layer on the flat portion of the base striped steel plate is within the above range. From the viewpoint of improving primary rust prevention, the thickness of the chemical conversion coating layer on the flat part of the base striped steel plate is preferably 0.20 to 4.00 ⁇ m, more preferably 0.30 to 3.00 ⁇ m.
• the film thickness of the chemical conversion film layer in the flat part is the film thickness of the chemical conversion film layer in the flat part 3 mm away from the convex part (the film thickness of the chemical conversion film layer at the position shown at F2 in FIG. 1A). ).
• the thickness ratio of the chemical conversion coating layer on the flat part and the convex part of the base striped steel sheet is 0.2 to 5. It is 0. If the film thickness ratio of the chemical conversion coating layer between flat areas and convex areas is too low, the convex areas will be thicker and the flat areas will be thinner, making coating defects more likely to occur on flat areas, causing localized white rust, and causing primary damage. Rust prevention becomes poor.
• the film thickness ratio of the chemical conversion coating layer on the flat portion and the convex portion is within the above range.
• the thickness ratio of the chemical conversion coating layer between the flat portion and the convex portion is preferably 0.3 to 4.0, more preferably 0.4 to 3.0.
• the thickness of the chemical conversion coating layer formed on the convex portions and flat portions is usually a transparent coating layer of several micrometers and is located on the surface of the metal layer that reflects light. Therefore, interference colors may appear due to the refraction of light caused by the thickness of the chemical conversion coating layer. Since interference colors produce colors such as red, yellow, or green, they appear like patterns in various parts of the plated striped steel sheet, causing poor appearance.
• the thickness of the chemical conversion coating layer on the convex and flat areas should be made as similar as possible to achieve a uniform appearance and to prevent phenomena such as color spots and other patterns that appear. will disappear. Therefore, from the viewpoint of suppressing phenomena that look like patterns such as color spots, the film thickness ratio of the chemical conversion coating layer between the flat part and the convex part is most preferably 1.0, and 0.4 or more and 1.5 or less. More preferably, it is 0.8 or more and 1.1 or less. If the above film thickness ratio is applied to the chemical conversion coating layer on the flat portion and the convex portion, the hue will be the same color system.
• the plated striped steel sheet of the present disclosure may be arc welded to various members in addition to cutting and bending in order to make structures such as parking lot pallets and stair steps.
• controlling the thickness of the chemical conversion coating layer affects arc welding.
• plated striped steel sheets require a higher welding current than hot rolled striped steel sheets without a plating layer, which may result in welding defects.
• a chemical conversion coating layer is formed on the plating layer, the following problems may occur. (1) Current flow becomes unstable, and the bead formed during arc welding becomes unstable. (2) Sputter marks become more severe due to large current. (3) Damage to the chemical conversion coating layer causes the weld to spread out more than necessary. (4) Welding fumes become intense due to the gas vaporized from the chemical conversion coating layer. (5) Foreign matter occurs inside the bead.
• the shape of the bead greatly affects the strength of structures obtained from plated striped steel sheets. Therefore, the shape of the bead, specifically, it is preferable to appropriately release the fume gas generated during welding and prevent it from being taken into the bead.
• plated striped steel sheets have a larger current value than hot rolled steel sheets and are difficult to weld, and if the chemical conversion coating layer is uniformly formed, it generally tends to be difficult to conduct electricity.
• the film thickness ratio between the flat portion and the convex portion is large, there are regions where the chemical conversion coating layer is partially thin. Thereby, the arc is relatively easy to stabilize and the shape of the bead is stabilized.
• the thickness ratio of the chemical conversion coating layer between the flat part and the convex part is preferably less than 0.8, or preferably 1.5 or more, and less than 0.6. , or more preferably 1.9 or more.
• the film thickness ratio of the chemical conversion coating layer between the flat part and the convex part should be 0.2 or more and less than 0.8, or It is preferably 1.5 or more and 5.0 or less, more preferably 0.2 or more and less than 0.6, or more preferably 1.9 or more and 5.0 or less.
• the thickness of the chemical conversion coating layer in the convex portion is the thickness of the chemical conversion coating layer at the central portion in the length direction and the central portion in the width direction of the convex portion (the thickness of the chemical conversion coating layer at the position indicated by F1 in FIG. 1A). layer thickness).
• the film thickness of the chemical conversion coating layer is measured as follows.
• a plated striped steel plate to be measured is cut in the thickness direction of the plated striped steel plate at the central portion in the length direction of the convex portion and along the width direction of the convex portion to collect a sample.
• a plated striped steel plate is cut at a position corresponding to the FF cross section in FIG. 1A, and a sample is collected.
• a gold film is deposited on the surface of the chemical conversion coating layer of the sample.
• the sample is embedded in epoxy resin and polished to the observation position.
• the cut cross section of the polished sample is observed using a scanning electron microscope (SEM) at a magnification of 10,000 times.
• SEM scanning electron microscope
• the film thickness of the chemical conversion film layer at each position is measured as follows.
• the thickness of the chemical conversion coating layer at each position is determined by measuring the thickness of the layer between the plating layer and the gold film.
• Thickness of the chemical conversion coating layer at the central portion in the length direction and central portion in the width direction of the convex portion thickness of the chemical conversion coating layer at the position indicated by F1 in FIG. 1A.
• Thickness of the chemical conversion coating layer at the flat portion 3 mm away from the convex portion thickness of the chemical conversion coating layer at the position indicated by F2 in FIG. 1A).
• the above operation is performed three times, and the average value of the film thickness of the chemical conversion film layer at each position is determined.
• the components of the chemical conversion coating layer are not particularly limited, and well-known components can be used.
• Examples of the chemical conversion film layer include silane coupling agents (organosilicon compounds), zirconium compounds, titanium compounds, phosphoric acid compounds, fluorine compounds, vanadium compounds, cobalt compounds, zirconium ammonium carbonate, acrylic resins, vanadium compounds, and phosphorus compounds.
• Examples include well-known chemical conversion coating layers containing as a main component. Note that the main component refers to the component that is the most abundant in the layer. However, from the viewpoint of reducing environmental load, the chemical conversion coating layer is preferably a chemical conversion coating layer other than the chromate chemical conversion coating layer.
• the following coating layers are preferable as the chemical conversion coating layer.
• Formula -SiR 1 R 2 R in the molecule obtained by blending a silane coupling agent containing one amino group in the molecule and a silane coupling agent containing one glycidyl group in the molecule.
• R 1 , R 2 and R 3 independently represent an alkoxy group or a hydroxyl group, and at least one represents an alkoxy group
• titanium hydrofluoric acid titanium hydrofluoric acid.
• a film layer containing at least one fluoro compound selected from zirconium hydrofluoric acid, phosphoric acid, and a vanadium compound a film layer containing at least one fluoro compound selected from zirconium hydrofluoric acid, phosphoric acid, and a vanadium compound.
• a film layer containing acrylic resin, zirconium, vanadium, phosphorus, and cobalt a film layer containing at least one fluoro compound selected from zirconium hydrofluoric acid, phosphoric acid, and a vanadium compound.
• Method for manufacturing plated striped steel sheet (Method for manufacturing plated striped steel sheet)
• a method for manufacturing a plated striped steel sheet of the present disclosure is particularly shown in FIGS. It is suitable for a method of manufacturing a plated striped steel sheet using a base striped steel sheet having a shape in which the minimum width D of the portion, the arrangement pitch E of the convex portions, the height H of the convex portions, and the area occupation rate of the convex portions are within the above ranges.
• the method for manufacturing a plated striped steel sheet of the present disclosure includes a plating layer forming step and a chemical conversion film forming step.
• a plating layer per one side of a base striped steel plate is provided with convex portions and flat portions with a height of 3 mm or less on one plate surface.
• a plating layer including a zinc-based alloy layer is formed with a deposition amount of 60 to 500 g/m 2 .
• the method of forming the plating layer is not particularly limited, and any known method may be employed.
• a base striped steel plate is heated and held at a temperature higher than the plating bath temperature +20°C and lower than 850°C, and then cooled to a range of higher than the plating bath temperature and lower than the plating bath temperature +10°C.
• the temperature of the plating bath is over 500°C, cool it to 500°C at a cooling rate of 1 to 20°C/s, and apply the plating layer to the base striped steel plate.
• the plating is performed by, for example, a continuous hot-dip metal plating method such as the Sendzimir method.
• pre-plating for example, pre-Ni plating
• pre-plating may be applied to the base striped steel plate.
• a plurality of grooves along the circumferential direction are arranged in the axial direction on the outer peripheral surface, the pitch of the grooves is 0.2 to 1.0 mm, the height of the grooves is 0.05 to 0.5 mm, and the grooves are arranged in the axial direction.
• a grooving applicator roll with a ratio of pitch to groove height (groove pitch/groove height) of 2 to 8, so that the circumferential direction of the grooving applicator roll is in the length direction of the convex part of the base striped steel plate.
• a chemical conversion treatment chemical solution hereinafter also referred to as "chemical solution” is applied to the surface of the plating layer at an angle within the range of 45 ⁇ 10° to form a chemical conversion treatment film layer.
• a chemical conversion treatment chemical solution is applied to the surface of the plating layer to form a chemical conversion film layer using, for example, the coating apparatus shown in FIG.
• the coating device may be a known coating device including a grooved applicator roll.
• the coating device shown in Fig. 2 includes a grooved applicator roll that applies a chemical solution by transfer onto the surface of the plating layer of a base striped steel plate on which a plating layer has been formed, and a groove-cutting applicator roll that is placed opposite to the base striped steel plate with the base striped steel plate interposed therebetween.
• an applicator roll on the opposite side may be arranged instead of the backup roll. In this case, from the viewpoint of coatability on the opposite side, the base striped steel plate is moved straight without changing the direction of movement by the rolls.
• a storage pan that stores the chemical solution
• a pickup roll that picks up the chemical solution from the storage pan and then supplies the chemical solution to the grooved applicator roll.
• a transfer roll may be arranged between the pickup roll and the applicator roll.
• 101 is a coating device
• 10 is a grooved applicator roll
• 12 is a backup roll
• 14 is a storage pan
• 14A is a chemical conversion treatment liquid
• 16 is a pick-up roll
• M1 is a striped substrate on which a plating layer is formed.
• the steel plate, M2 is a base striped steel plate on which a chemical conversion coating and a plating layer are formed
• A indicates the threading direction of the base striped steel plate on which a plating layer is formed.
• the grooved applicator roll for example, an applicator roll having a metal roll and a rubber coating layer provided on the outer peripheral surface of the metal roll can be adopted.
• a plurality of circumferential grooves are arranged in the axial direction on the outer peripheral surface of the grooved applicator roll.
• the pitch of the grooves (see 10P in Figure 3) is 0.2 to 1.0 mm
• the height of the grooves (see 10H in Figure 3) is 0.05 to 0.5 mm
• the pitch of the grooves is 0.2 to 1.0 mm.
• the ratio to the groove height (groove pitch/groove height) is 2 to 8.
• the groove pitch means both the groove width and the width of the convex portion formed between adjacent grooves.
• the groove width and the width of the convex portion formed between adjacent grooves are often the same.
• 10 indicates a groove cutting applicator roll
• 10A indicates a groove
• 10P indicates a pitch of the groove
• 10H indicates a height of the groove.
• the pitch of the grooves is set to 0.2 mm or more and 1.0 mm or less, the amount of the chemical solution taken out becomes appropriate.
• the height of the groove is set to 0.05 mm or more, the amount of the chemical solution taken out becomes appropriate.
• the height of the groove is set to 0.5 mm or less, air entrapment by the groove is suppressed.
• the ratio of the pitch of the grooves to the height of the grooves in the groove cutting applicator roll is 2 or more and 8 or less, the amount of chemical conversion treatment liquid taken out is ensured, and the convex parts, flat parts, and convex parts of the base striped steel plate are secured.
• the chemical solution can be evenly applied to the boundary between the flat part and the flat part (that is, the base of the convex part).
• the ratio of the maximum width of the protrusions of the base striped steel plate (see C in FIG. 1A) to the pitch of the grooves (maximum width of the protrusions of the base striped steel plate/groove pitch) is, for example, 3. It is desirable to set it to 0 to 40.0.
• the pitch of the grooves will not be too large relative to the maximum width of the convex portions of the base striped steel plate. Therefore, the groove for holding the chemical liquid is also close to the boundary between the convex portion and the flat portion of the base striped steel plate (that is, the base of the convex portion), making it easier for the chemical liquid to spread.
• the ratio of the maximum width of the convex portions of the base striped steel plate to the pitch of the grooves is set to 40.0 or less, the pitch of the grooves will not be too small relative to the maximum width of the convex portions of the base striped steel plate.
• the groove for holding the chemical liquid is difficult to come close to the boundary between the convex part and the flat part of the base striped steel plate (that is, the base of the convex part), and the amount of the chemical liquid taken out is also ensured.
• the ratio between the maximum width of the convex portions of the base striped steel plate and the pitch of the grooves be within the above range.
• the carry-out amount of the chemical conversion treatment liquid is ensured, and it becomes easy to uniformly apply the chemical liquid to the convex portions, flat portions, and boundaries between the convex portions and the flat portions (that is, the bases of the convex portions) of the base striped steel plate.
• the film thickness of the chemical conversion coating layer in the flat part of the base striped steel plate and the film thickness ratio of the chemical conversion coating layer in the flat part and the convex part of the base striped steel plate tend to be within the above range.
• white rust is less likely to occur, and primary rust prevention defects are further suppressed.
• the grooved applicator roll is rotated, the chemical conversion treatment liquid is picked up by a pick-up roll from the storage pan in which the chemical conversion treatment liquid is stored, and then the chemical conversion treatment liquid is supplied to the grooved applicator roll.
• the threading of the base striped steel plate is started, and the chemical conversion treatment chemical solution supplied by the groove cutting applicator roll is passed through the plate, plating the base striped steel plate. Transfer and apply to layer surface.
• a chemical conversion treatment solution is applied to the surface of the plating layer with the circumferential direction of the groove applicator roll at an angle within the range of 45 ⁇ 10 degrees with respect to the length direction of the convex portion of the base striped steel plate.
• the circumferential direction of the grooving applicator roll is set at an angle within the range of 45 ⁇ 10° with respect to the length direction of the convex portion of the base striped steel plate, the angle in the width direction of the base striped steel plate (that is, the threading direction of the base striped steel plate)
• the heights of the convex portions that is, the stripe heights) in the orthogonal direction) can be made the same.
• the contact area between the convex portion and the roll is constant, and the rolling force of the grooving applicator roll against the base striped steel plate is uniform, and the convex portion, flat portion, and convex portion of the base striped steel plate are uniform.
• the chemical solution can be evenly applied to the boundary between the flat part and the flat part (that is, the base of the convex part).
• the grooves on the base striped steel plate are
• the linear pressure of the cutting applicator roll is preferably 1000 to 3000 (g/mm).
• the direction of rotation of the grooving applicator roll may be the same as the direction in which the base striped steel sheet passes, or may be in the opposite direction to the direction in which the base striped steel plate passes. However, it is better if the direction of rotation of the groove cutting applicator roll is opposite to the direction in which the base striped steel sheet is threaded. When the direction of rotation of the groove applicator roll is opposite to the direction in which the base striped steel sheet is threaded, uneven coating of the chemical solution during application of the chemical conversion treatment liquid is suppressed, and unevenness in the thickness of the chemical conversion coating layer is suppressed. Note that the rotational direction of the groove cutting applicator roll means the direction at a position facing the base striped steel plate (that is, the paint coating position P1 in FIG. 2).
• the amount of chemical solution supplied to the grooved applicator roll is appropriately set depending on the thickness of the chemical conversion coating layer.
• the rotational speed of the groove applicator roll is also appropriately set depending on the thickness of the chemical conversion coating layer to be formed on the surface of the plating layer of the base striped steel plate.
• the threading speed LS of the base striped steel plate is, for example, 20 to 200 m/min.
• the coating film After forming a coating film of a chemical solution on the surface of the plating layer on the base striped steel plate, the coating film is dried and/or hardened to form a chemical conversion treatment coating layer.
• the drying conditions and curing conditions for the coating film of the chemical solution may be appropriately set depending on the chemical solution used.
• the plated striped steel sheet of the present disclosure may have one or more organic resin coatings on the chemical conversion coating layer.
• the organic resin is not limited to a specific type, and includes, for example, polyester resin, polyurethane resin, epoxy resin, acrylic resin, polyolefin resin, fluororesin, or modified products of these resins.
• modified products are compounds in which the reactive functional groups contained in the structure of these resins are reacted with other compounds (monomers, crosslinking agents, etc.) that contain functional groups in their structure that can react with those functional groups. Refers to resin.
• organic resin one type or a mixture of two or more types of organic resins (unmodified) may be used, or at least one type of other organic resin may be used in the presence of at least one type of organic resin.
• Organic resins obtained by modifying organic resins may be used alone or in combination of two or more.
• the organic resin film may contain any coloring pigment or antirust pigment. It is also possible to use those made into aqueous systems by dissolving or dispersing them in water.
• Example 2 After melting the ingot using a predetermined amount of pure metal ingot so as to obtain a plating layer having the chemical composition shown in Table 1, a plating bath was prepared in the atmosphere. A batch hot-dip plating device was used to form the plating layer.
• plating layers were formed on both sides of the base striped steel plate as follows.
• the base striped steel plate was heated from room temperature by electrical heating in an N 2 -H 2 (5%) (dew point below -40°C, oxygen concentration below 25 ppm) environment, held for 60 seconds, and then heated by N 2 gas spraying.
• the sample was cooled to the plating bath temperature +10° C. and immediately immersed in the plating bath. Thereafter, the base striped steel plate was pulled out of the plating bath, the N 2 gas wiping pressure was adjusted, and the amount of the plating layer deposited was adjusted.
• the amount of plating layer deposited on the plate surface provided with convex portions and flat portions was as shown in Table 2.
• the base striped steel plate used was hot-rolled Al killed steel, and the shape of the base striped steel plate was the same as in FIGS. 1A to 1C. However, various hot-rolled striped steel plates having partially different shapes (height H of the protrusions, C maximum width of the protrusions) were used as the base striped steel plates.
• the specific shape is as follows.
• a pre-Ni-plated striped steel plate obtained by subjecting the hot-rolled striped steel plate to pre-Ni plating was used as the base striped steel plate.
• the amount of Ni deposited was 1 g/m 2 to 3 g/m 2 .
• examples in which a pre-Ni-plated striped steel plate was used as the base striped steel plate were written as "pre-Ni" in the column of "base striped steel plate” and "type" in Table 2.
• a chemical conversion treatment solution was applied to the surface of the plating layer to form a chemical conversion treatment film layer using the coating apparatus shown in FIG. 2 and equipped with a grooved applicator roll.
• angle indicates the angle formed by the circumferential direction of the groove cutting applicator roll with respect to the length direction of the convex portion of the base striped steel plate.
• line pressure indicates the rolling force of the groove cutting applicator roll against the base striped steel plate.
• the chemical conversion treatment liquid used is as follows.
• ⁇ Medical solution A Chemical solution containing 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, vanadium oxysulfate, phosphoric acid, and fluorinated zirconium acid
• ⁇ Medical solution B Chemical solution containing ammonium zirconium carbonate, acrylic resin, vanadium oxyoxalate, phosphoric acid, 1-hydroxyethane-1,1-diphosphonic acid, and cobalt nitrate.
• the obtained plated striped steel plate was cut to take a sample of 100 mm x 50 mm. Next, the back surface of the plate surface having the convex portions and flat portions, and the end surfaces were sealed. Next, the sample was subjected to a corrosion acceleration test (SST JIS Z 2371:2015) for 24 hours, and the area ratio of white rust occurrence on convex parts and flat parts was investigated.
• the white rust occurrence area ratio was evaluated as "A" when it was 10% or less, "B” when it was more than 10% but not more than 20%, "C” when it was more than 20% and not more than 30%, and "D” when it was more than 30%.
• the appearance of the plated striped steel sheet obtained was observed. Specifically, it is as follows. First, a straight tube fluorescent lamp white light source (straight tube fluorescent lamp Highlight 6 type FL6W) manufactured by Panasonic was placed at a distance of 1 m from each striped surface. Next, while the striped surface was irradiated with white light from a light source, photographs were taken of the striped surface in an area of 1200 mm in the width direction and 1000 mm in length at intervals of 100 ⁇ 100 mm. The color difference ⁇ E in an area of 100 ⁇ 100 mm was measured from the reduced photograph. Specifically, coordinate values (L * value, a * value, and b * value) of the CIE1976L * a * b * color system were determined.
• the color difference ⁇ E from the measurement point where the color difference ⁇ E is maximum was determined from the average value of the L* value, the a* value, and the b* value.
• the average color difference ⁇ E over the entire range was measured and evaluated according to the following criteria. A: Average color difference ⁇ E is 0.6 or less B: Average color difference ⁇ E is more than 0.6 and less than 1.2 C: Average color difference ⁇ E is 1.2 or more
• the obtained weld bead was subjected to X-ray projection, and the quality of welding was evaluated based on the blowhole aperture ratio of the fillet weld according to the following criteria.

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• 2023
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