WO2022203063A1 - プレコート金属板 - Google Patents
プレコート金属板 Download PDFInfo
- Publication number
- WO2022203063A1 WO2022203063A1 PCT/JP2022/014585 JP2022014585W WO2022203063A1 WO 2022203063 A1 WO2022203063 A1 WO 2022203063A1 JP 2022014585 W JP2022014585 W JP 2022014585W WO 2022203063 A1 WO2022203063 A1 WO 2022203063A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal sheet
- particles
- film layer
- region
- precoated metal
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 133
- 239000002184 metal Substances 0.000 title claims abstract description 133
- 239000002245 particle Substances 0.000 claims abstract description 100
- 230000003746 surface roughness Effects 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims description 99
- 229910000831 Steel Inorganic materials 0.000 claims description 52
- 239000010959 steel Substances 0.000 claims description 52
- 239000000126 substance Substances 0.000 claims description 50
- 238000000576 coating method Methods 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 41
- 238000007747 plating Methods 0.000 claims description 39
- 239000011247 coating layer Substances 0.000 claims description 32
- 229920005989 resin Polymers 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- 238000007739 conversion coating Methods 0.000 claims description 20
- 239000000049 pigment Substances 0.000 claims description 20
- 239000011701 zinc Substances 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 238000004040 coloring Methods 0.000 claims description 8
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- 229920000178 Acrylic resin Polymers 0.000 claims description 7
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- 239000012535 impurity Substances 0.000 claims description 4
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- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
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- 239000010954 inorganic particle Substances 0.000 claims description 3
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- 238000006243 chemical reaction Methods 0.000 description 25
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 20
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 17
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- KNTKCYKJRSMRMZ-UHFFFAOYSA-N 3-chloropropyl-dimethoxy-methylsilane Chemical compound CO[Si](C)(OC)CCCCl KNTKCYKJRSMRMZ-UHFFFAOYSA-N 0.000 description 2
- 229910002012 Aerosil® Inorganic materials 0.000 description 2
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- 150000003863 ammonium salts Chemical class 0.000 description 2
- 239000002585 base Substances 0.000 description 2
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- 239000004566 building material Substances 0.000 description 2
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 description 2
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- 238000005246 galvanizing Methods 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
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- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
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- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
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- MBNRBJNIYVXSQV-UHFFFAOYSA-N 3-[diethoxy(methyl)silyl]propane-1-thiol Chemical compound CCO[Si](C)(OCC)CCCS MBNRBJNIYVXSQV-UHFFFAOYSA-N 0.000 description 1
- DOYKFSOCSXVQAN-UHFFFAOYSA-N 3-[diethoxy(methyl)silyl]propyl 2-methylprop-2-enoate Chemical compound CCO[Si](C)(OCC)CCCOC(=O)C(C)=C DOYKFSOCSXVQAN-UHFFFAOYSA-N 0.000 description 1
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- WSFMFXQNYPNYGG-UHFFFAOYSA-M dimethyl-octadecyl-(3-trimethoxysilylpropyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCC[Si](OC)(OC)OC WSFMFXQNYPNYGG-UHFFFAOYSA-M 0.000 description 1
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 1
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
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- LIBWSLLLJZULCP-UHFFFAOYSA-N n-(3-triethoxysilylpropyl)aniline Chemical compound CCO[Si](OCC)(OCC)CCCNC1=CC=CC=C1 LIBWSLLLJZULCP-UHFFFAOYSA-N 0.000 description 1
- KBJFYLLAMSZSOG-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)aniline Chemical compound CO[Si](OC)(OC)CCCNC1=CC=CC=C1 KBJFYLLAMSZSOG-UHFFFAOYSA-N 0.000 description 1
- NQKOSCFDFJKWOX-UHFFFAOYSA-N n-[3-[diethoxy(methyl)silyl]propyl]aniline Chemical compound CCO[Si](C)(OCC)CCCNC1=CC=CC=C1 NQKOSCFDFJKWOX-UHFFFAOYSA-N 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
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- GQJPVGNFTLBCIQ-UHFFFAOYSA-L sodium;zirconium(4+);carbonate Chemical compound [Na+].[Zr+4].[O-]C([O-])=O GQJPVGNFTLBCIQ-UHFFFAOYSA-L 0.000 description 1
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- 238000005728 strengthening Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- BFDQRLXGNLZULX-UHFFFAOYSA-N titanium hydrofluoride Chemical compound F.[Ti] BFDQRLXGNLZULX-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 239000005051 trimethylchlorosilane Substances 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-N triphosphoric acid Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(O)=O UNXRWKVEANCORM-UHFFFAOYSA-N 0.000 description 1
- 229940048102 triphosphoric acid Drugs 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- JBIQAPKSNFTACH-UHFFFAOYSA-K vanadium oxytrichloride Chemical compound Cl[V](Cl)(Cl)=O JBIQAPKSNFTACH-UHFFFAOYSA-K 0.000 description 1
- VLOPEOIIELCUML-UHFFFAOYSA-L vanadium(2+);sulfate Chemical compound [V+2].[O-]S([O-])(=O)=O VLOPEOIIELCUML-UHFFFAOYSA-L 0.000 description 1
- ITAKKORXEUJTBC-UHFFFAOYSA-L vanadium(ii) chloride Chemical compound Cl[V]Cl ITAKKORXEUJTBC-UHFFFAOYSA-L 0.000 description 1
- HQYCOEXWFMFWLR-UHFFFAOYSA-K vanadium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[V+3] HQYCOEXWFMFWLR-UHFFFAOYSA-K 0.000 description 1
- UUUGYDOQQLOJQA-UHFFFAOYSA-L vanadyl sulfate Chemical compound [V+2]=O.[O-]S([O-])(=O)=O UUUGYDOQQLOJQA-UHFFFAOYSA-L 0.000 description 1
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- 239000001993 wax Substances 0.000 description 1
- QMGSCCRUAVAONE-UHFFFAOYSA-N zinc zirconium Chemical compound [Zn].[Zn].[Zn].[Zr] QMGSCCRUAVAONE-UHFFFAOYSA-N 0.000 description 1
- XJUNLJFOHNHSAR-UHFFFAOYSA-J zirconium(4+);dicarbonate Chemical compound [Zr+4].[O-]C([O-])=O.[O-]C([O-])=O XJUNLJFOHNHSAR-UHFFFAOYSA-J 0.000 description 1
Images
Classifications
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- 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
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- 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
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- C23C22/20—Orthophosphates containing aluminium cations
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- C09D5/002—Priming paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- 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
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- C23C2/06—Zinc or cadmium or alloys based thereon
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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
- 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
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- C23C22/22—Orthophosphates containing alkaline earth metal cations
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/40—Metallic substrate based on other transition elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2301/00—Inorganic additives or organic salts thereof
- B05D2301/10—Phosphates, phosphoric acid or organic salts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/20—Chromatation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/60—Adding a layer before coating
- B05D2350/65—Adding a layer before coating metal layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2518/00—Other type of polymers
- B05D2518/10—Silicon-containing polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
- B05D2601/22—Silica
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
- B05D2601/28—Metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2602/00—Organic fillers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
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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
- 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
Definitions
- the present invention relates to precoated metal sheets.
- Organic resin-coated steel sheets are made by coating the surface layer of zinc-based steel sheets with an organic resin film to replace conventional post-coated products that are coated after molding, such as for home appliances, building materials, and automobiles. ) has come into use.
- This pre-coated steel sheet is a steel sheet that has undergone rust prevention treatment or a plated steel sheet and is coated with a colored organic film. have.
- This organic resin-coated plated steel sheet is often used as a material for home appliances, building materials, automobiles, etc., without being subjected to further coating after press working. Therefore, such an organic resin-coated plated steel sheet is required to have excellent scratch resistance so as not to lose its beauty during processing. Therefore, various techniques have been proposed in the past in order to improve various properties such as scratch resistance of precoated steel sheets.
- Patent Document 1 proposes a technique of providing a colored coating film containing two types of particles having a predetermined average particle size and a coloring pigment on at least one side of a metal plate.
- Patent Document 1 obtains scratch resistance by including spherical silica particles having an average particle diameter of 5 to 50 nm in a colored film having a thickness of 2 to 10 ⁇ m.
- the present technology can provide resistance to scratches as evaluated by pencil hardness, resistance to surface contact flaws such as plate surfaces rubbing against each other is not sufficient, and there is still room for improvement.
- an object of the present invention is to provide a precoated metal sheet with improved resistance to surface contact scratches as a further improvement in scratch resistance. to provide.
- the inventors of the present invention conducted intensive studies and found that the surface roughness of the precoated metal sheet was adjusted to a desired level, and particles having a specific particle diameter were included to improve resistance to surface contact.
- the present invention was completed based on the idea that it might be possible to further improve the scratch resistance.
- the gist of the present invention completed based on this idea is as follows.
- a metal plate and a colored film layer positioned on the metal plate are provided, and at least the surface of the metal plate on which the colored film layer is positioned is measured for the following arithmetic mean surface roughness Sa.
- a precoated metal sheet having a first region and a second region specified by a method, wherein the colored coating layer has a thickness of 1 to 10 ⁇ m or more and contains particles having a particle diameter equal to or greater than the thickness. .
- Method for measuring arithmetic mean surface roughness Sa On the surface of the metal plate, virtual grid lines are set at intervals of 0.5 mm, and in each of a plurality of regions separated by the virtual grid lines, the arithmetic mean surface roughness Sa specified by ISO 25178 to measure.
- a region having the obtained arithmetic mean surface roughness Sa of 1 ⁇ m or more is defined as the first region, and a region having the obtained arithmetic mean surface roughness Sa of less than 1 ⁇ m is defined as the second region.
- the precoated metal plate according to (1) wherein the area ratio of the first region on the surface of the metal plate is 10 to 90% per side.
- the content of the particles in the colored film layer is 5 to 50% by mass with respect to the total content of the film-forming component of the colored film layer and the particles, according to (1) to (3) A precoated metal sheet according to any one of the above.
- the plating layer contains Al: 4 to 22% by mass, Mg: 1 to 10% by mass, Si: 0.0001 to 2.0000% by mass, and the balance is Zn and impurities. , (10) or precoated metal sheet according to (11).
- FIG. 1A and FIG. 1B are explanatory diagrams schematically showing the structure of the precoated metal sheet according to this embodiment.
- the precoated metal plate 1 has a metal plate 10 as a base material and a colored film layer 20 located on one side of the metal plate 10. is doing. Moreover, as shown in FIG. 1A, it is preferable to further have a chemical conversion coating layer 30 between the metal plate 10 and the colored coating layer 20 .
- the colored film layer 20 and the chemical conversion film layer 30 may be provided on both sides of the metal plate 10 as schematically shown in FIG. 1B.
- metal plate used as the base material various metal plates can be used according to the mechanical strength and the like required for the precoated metal plate 1 .
- metal plates include aluminum plates, zinc plates, stainless steel plates, titanium plates, and steel plates.
- the thickness of the metal plate 10 according to the present embodiment may be appropriately set according to the mechanical strength required for the precoated metal plate 1, and can be, for example, about 0.2 mm to 10.0 mm.
- metal plate 10 for example, Al-killed steel, ultra-low carbon steel containing Ti, Nb, etc., and high carbon steel containing strengthening elements such as P, Si, Mn, etc.
- Various steel plates, such as high strength steel, can be used.
- a plated steel sheet having various plating layers formed on the surface of the steel sheet may be used.
- zinc-based plating includes, for example, hot dip galvanizing, electrogalvanizing, zinc-nickel alloy plating, alloyed hot-dip galvanizing, aluminum-zinc alloy plating, zinc-aluminum-magnesium alloy plating, zinc-vanadium composite plating, zinc - Zirconium composite plating and the like.
- zinc-aluminum-magnesium alloy plating is particularly preferable, and contains Al: 4 to 22% by mass, Mg: 1 to 10% by mass, and Si: 0.0001 to 2.0000% by mass.
- the corrosion resistance of the steel sheet is improved by setting the Al content to 4% by mass or more and 22% by mass or less. If the Al content is less than 4% by mass, the corrosion resistance may deteriorate.
- the content of Al is preferably 5% by mass or more. On the other hand, if the Al content exceeds 22% by mass, the effect of improving the corrosion resistance of the plating layer 20 may be saturated.
- the Al content is preferably 16% by mass or less.
- Mg 1 to 10% by mass
- Si 0.0001 to 2.0000% by mass
- elements such as Fe, Sb, and Pb may be contained singly or in combination at 1% by mass or less in place of part of the remaining Zn.
- a plated steel sheet provided with a coating layer having the chemical composition as described above for example, a plated steel sheet having a Zn-11%Al-3%Mg-0.2%Si alloy coating layer, such as hot dip zinc-aluminum -Magnesium-silicon alloy plated steel sheet (eg, "Superdyma (registered trademark)" manufactured by Nippon Steel Corporation) and the like.
- a plated steel sheet having a Zn-11%Al-3%Mg-0.2%Si alloy coating layer such as hot dip zinc-aluminum -Magnesium-silicon alloy plated steel sheet (eg, "Superdyma (registered trademark)" manufactured by Nippon Steel Corporation) and the like.
- the plating layer as described above can be produced, for example, as follows. First, the surface of the prepared steel plate is subjected to pretreatment such as cleaning and degreasing as necessary. After that, the steel sheet, which has been pretreated as necessary, is immersed in a hot-dip plating bath having a desired chemical composition, and the steel sheet is pulled out of the plating bath. In such a plating operation, the plating may be performed by either a continuous plating method for coils or a plating method for individual cut plates.
- the temperature of the hot-dip plating bath varies depending on the composition, but is preferably in the range of 400-500°C, for example.
- the coating amount as described above can be controlled by adjusting the lifting speed of the steel sheet, the flow rate of the wiping gas ejected from the wiping nozzle provided above the plating bath, and the flow rate adjustment.
- the total coating weight on both sides of the steel sheet is preferably 30 g/m 2 or more (that is, 15 g/m 2 or more per side). If the adhesion amount is less than 30 g/m 2 , the corrosion resistance may deteriorate, which is not preferable.
- the coating weight of plating is more preferably 40 g/m 2 or more.
- the total amount of coating on both sides of the steel sheet is preferably 600 g/m 2 or less (that is, 300 g/m 2 or less per side).
- the molten metal attached to the steel sheet may sag and the surface of the hot dip plated layer may not be smoothed, which is not preferable. More preferably, the total coating weight of the coating layer on both sides of the steel sheet is 550 g/m 2 or less.
- the steel sheet is cooled. At this time, the cooling conditions need not be particularly limited.
- FIG. 2 is an explanatory diagram for explaining the surface shape of the metal plate in the precoated metal plate according to this embodiment.
- the surface on the side where the colored film layer 20 is located has a first region and a second region specified by the following method for measuring the arithmetic mean surface roughness Sa.
- ⁇ Method for measuring arithmetic mean surface roughness Sa>> On the surface of the metal plate 10, virtual grid lines are set at intervals of 0.5 mm, as schematically shown in FIG. Arithmetic mean surface roughness Sa defined in ISO 25178 is measured using a degree meter. A region where the obtained arithmetic mean surface roughness Sa is 1 ⁇ m or more is defined as a first region, and a region where the obtained arithmetic mean surface roughness Sa is less than 1 ⁇ m is defined as a second region. If a film already exists, rub it with gauze impregnated with an organic solvent (e.g., MEK (methyl ethyl ketone), etc.) to remove the coating film, and then measure the roughness. is possible. In addition, when using the plated steel plate in which the plating layer was formed as the metal plate 10, the above arithmetic mean roughness Sa shall be measured in the surface of a plating layer.
- MEK methyl ethyl ketone
- the arithmetic mean surface roughness Sa is measured using a 3D laser microscope (manufactured by KEYENCE CORPORATION).
- a 20 ⁇ standard lens is used to measure the height A in each of a plurality of regions partitioned by virtual grid lines at intervals of 50 ⁇ m.
- 100 measurement points 81 measurement points in the region + 19 points on two sides of the grid lines of the outer frame of the region
- the obtained height A100 point is defined as height A 1 to height A 100
- Sa is calculated using the following formula.
- the first region specified by the above measurement can be considered as an uneven portion on the surface of the metal plate 10, and the second region specified by the above measurement is a flat portion on the surface of the metal plate 10. can also be considered.
- the particles present in the colored film layer 20 have particle diameters as described later, so that the colored film Particles in layer 20 become anchored by such second regions, preventing migration and dropout of the particles.
- Some of the fixed particles have a particle diameter larger than the thickness of the colored film layer 20, as will be described later. As a result, the resistance of the precoated metal plate 1 to surface contact flaws is improved.
- the upper limit of the arithmetic mean surface roughness Sa in the first region is not particularly defined, but when the arithmetic mean surface roughness Sa exceeds the thickness of the colored film layer, the colored film partially Corrosion resistance may decrease due to thinning of the layer. Therefore, the arithmetic mean surface roughness Sa in the first region is preferably equal to or less than the thickness of the colored film layer.
- the lower limit of the arithmetic mean surface roughness Sa in the second region is not particularly defined, and the smaller the better, but if it is less than 0.05 ⁇ m, manufacturing difficulties often occur. . Therefore, the lower limit of the arithmetic mean surface roughness Sa in the second region is substantially about 0.05 ⁇ m.
- the area ratio of the first region on the surface of the metal plate 10 is preferably 10% or more per side.
- the area ratio of the first region per one side is 10% or more, the area of the portion where the film is thin in the first region is reduced, and the corrosion resistance can be further improved.
- the area ratio of the first region is more preferably 20% or more per side, and still more preferably 30% or more.
- the area ratio of the first region on the surface of metal plate 10 is preferably 90% or less per side. By setting the area ratio of the first region per one side to 90% or less, the resistance to surface contact flaws can be further improved.
- the area ratio of the first region on the surface of metal plate 10 is more preferably 80% or less, and even more preferably 70% or less.
- the ratio of the area ratio of the first region to the area ratio of the second region is preferably 0.3 or more, more preferably 0.4 or more. Also, the ratio of the area ratio of the first region to the area ratio of the second region is preferably 3.0 or less, more preferably 2.5 or less. When the ratio of the area ratio is within the above range, the particles of the colored film layer 20 can be more reliably fixed, and the resistance to surface contact flaws can be further improved.
- the surface shape as described above is realized by subjecting the surface of the metal plate 10 of interest to physical or chemical surface processing (for example, surface polishing, surface grinding, chemical etching, etc.). Alternatively, it may be already realized on the surface of the metal plate 10 without surface treatment as a result of manufacturing the metal plate 10 .
- the area ratio of the first region as described above can be controlled by adjusting various conditions of the surface processing.
- FIG. 3 is an explanatory diagram for explaining the colored film layer 20 of the precoated metal sheet according to this embodiment.
- the colored film layer 20 is a film layer colored to a desired color by having a coloring pigment.
- the colored film layer 20 contains a film-forming component 201 and particles 203, as schematically shown in FIG. has a particle size of In other words, the particles 203 have such a variation in particle size that at least part of the particle size is greater than or equal to the thickness of the colored film layer 20 .
- the unevenness existing on the surface of the metal plate 10 functions as a wall that hinders the physical movement of the particles 203. As a result of restricting the movement of the particles 203, the particles 203 are fixed.
- the presence of the particles 203 protruding from the surface of the colored film layer 20 prevents contact with the particles 203 rather than the contact of the entire colored film layer 20.
- contact with some surface is not surface contact with the entire colored film layer 20, but point contact with the particles 203 protruding from the colored film layer 20.
- This makes it possible to improve the scratch resistance (more specifically, resistance to surface contact scratches) of the precoated metal sheet 10 according to the present embodiment.
- FIG. 3 describes the case where the surface of the metal plate 10 has convex portions, the same can be said for the case where the surface of the metal plate 10 has concave portions.
- the thickness of the colored film layer 20 is 1 ⁇ m or more. If the thickness of the colored film layer 20 is less than 1 ⁇ m, the desired scratch resistance cannot be exhibited.
- the thickness of the colored film layer 20 is preferably 2 ⁇ m or more, more preferably 3 ⁇ m or more.
- the thickness of the colored film layer 20 is 10 ⁇ m or less. If the thickness of the colored film layer 20 exceeds 10 ⁇ m, the cost is increased, and coating film defects such as popping may occur, making it difficult to obtain a stable appearance.
- the thickness of the colored film layer 20 is preferably 8 ⁇ m or less, more preferably 7 ⁇ m or less.
- the thickness of the colored film layer 20 can be measured by cross-sectional observation.
- the thickness may be measured at a plurality of arbitrary positions (for example, 10 positions), and the average value of the obtained plurality of thicknesses may be used as the thickness of the colored film layer 20 .
- the content of the particles 203 is preferably 5% by mass or more with respect to the total content of the film-forming component 201 and the particles 203 . This makes it possible to further improve the scratch resistance.
- the content of particles 203 in colored film layer 20 is more preferably 10% by mass or more.
- the content of particles 203 is 50% by mass or less with respect to the total content of film-forming component 201 and particles 203 . This makes it possible to further improve the scratch resistance. If the content of the particles 203 is more than 50% by mass, the ratio of the film-forming component in the colored coating decreases, the barrier properties of the coating deteriorate, and it becomes difficult to develop the desired corrosion resistance.
- the content of particles 203 in colored film layer 20 is more preferably 45% by mass or less.
- any material can be used as the film-forming component 201 of the colored film layer 20 according to the present embodiment as long as it functions as a binder for the particles 203. It is preferable to use various organic resins. Examples of such a film-forming component 201 include acrylic resins, polyester resins, urethane resins, fluorine resins, and the like. When resin particles made of an organic resin are used as the particles 203 , it is preferable to select, as the film-forming component 201 , the same kind of resin as that of the resin particles. As a result, the affinity between the film-forming component 201 and the particles 203 is improved, and the adhesion of the colored film layer 20 can be further improved.
- the particles 203 of the colored film layer 20 according to the present embodiment are preferably inorganic particles that are at least one of silica, ceramic, or metal compounds, or resin particles that are made from an organic resin.
- resin particles by using resin particles, it is possible to reduce the impact applied to the colored film layer 20 due to the toughness and ductility of the resin particles, and it is possible to further improve the scratch resistance.
- resin particles include acrylic resin particles, polyester resin particles, urethane resin particles, fluororesin particles, silicone resin particles, polyolefin resin particles, etc. Acrylic resin particles can be used. more preferred.
- the coloring pigment itself contained in the coloring film layer 20 may function as the particles 203 as described above.
- some particles 203 have a particle diameter larger than the thickness of the colored film layer 20, and the average particle diameter is preferably 1 to 15 ⁇ m.
- the particles 203 have the above average particle diameter, it is possible to further improve the scratch resistance of the precoated metal sheet.
- the average particle diameter of the particles 203 can be measured by direct observation from the cross section. Specifically, a coated metal plate is embedded in a room-temperature-drying type epoxy resin perpendicularly to the coating film thickness direction, and the embedded surface is mechanically polished and then observed with a SEM (scanning electron microscope). At that time, the particle diameters of the particles 203 observed at a plurality of arbitrary positions (for example, 10 positions) may be measured, and the average value of the obtained plurality of particle diameters may be taken as the average particle diameter of the particle diameters 203. .
- the particles 203 have a particle size larger than the thickness of the film, and an average particle size of 0.3 to 2.5 times the thickness of the colored film layer 20 .
- the relationship between the average particle diameter of the particles 203 and the thickness of the colored film layer 20 as described above makes it possible to further improve the scratch resistance of the precoated metal sheet.
- the coloring pigment contained in the colored film layer 20 is not particularly limited, and various known pigments can be appropriately used according to the desired color tone of the colored film layer 20 .
- Examples of such color pigments include aluminum pigments, carbon black, TiO 2 and the like.
- the content thereof may be appropriately set, and may be, for example, about 3 to 60% by mass.
- Such a colored film layer 20 is obtained by applying a coating composition containing the components constituting the colored film layer 20 as described above on the surface of the metal plate 10, on the plated surface, on the surface of the metal plate 10 having the chemical conversion treatment film 30, Alternatively, it can be formed by applying it on the plated surface having the chemical conversion treatment film 30, baking it at a temperature of 150° C. or more and less than 300° C., and curing and drying it. If the baking temperature is less than 150°C, the baking hardening may be insufficient and the corrosion resistance and scratch resistance of the coating film may decrease. heat deterioration of the steel may occur, and the workability may decrease.
- the coating composition as described above can be applied by generally known coating methods such as roll coating, curtain flow coating, air spray, airless spray, immersion, bar coating, and brush coating.
- the colored film layer 20 may contain additives such as antirust pigments, surface-modified metal powders and glass powders, dispersants, leveling agents, waxes, aggregates, etc. or a diluent solvent or the like can be further included.
- additives such as antirust pigments, surface-modified metal powders and glass powders, dispersants, leveling agents, waxes, aggregates, etc. or a diluent solvent or the like can be further included.
- the content is preferably 1 to 15% by mass, for example.
- the chemical conversion treatment film layer 30 is a film layer that can be positioned between the metal plate 10 and the colored film layer 20, and removes impurities such as oil adhering to the surface of the metal plate 10 and surface oxides. , is a layer formed by chemical conversion treatment after removal by known degreasing and washing processes.
- the detailed configuration of the chemical conversion coating layer 30 includes, for example, resins, silane coupling agents, zirconium compounds, silica, phosphoric acid and its salts, fluorides, vanadium compounds, and tannin or tannic acid.
- the chemical conversion coating layer 30 contains one or more of a silane coupling agent or a zirconium compound, a crosslinked structure is formed in the chemical conversion coating layer 30, and the bonding with the plating surface is also strengthened. Therefore, it is possible to further improve the adhesion and barrier properties of the film.
- the chemical conversion treatment film layer 30 contains any one or more of silica, phosphoric acid and its salts, fluoride, or vanadium compound, it functions as an inhibitor, and a precipitated film or passive film on the plating or steel surface. By forming, it is possible to further improve the corrosion resistance.
- the resin is not particularly limited, and known organic resins such as polyester resins, polyurethane resins, epoxy resins, phenol resins, acrylic resins, and polyolefin resins can be used.
- organic resins such as polyester resins, polyurethane resins, epoxy resins, phenol resins, acrylic resins, and polyolefin resins
- at least one of resins (polyester resins, urethane resins, epoxy resins, acrylic resins, etc.) having forced sites or polar functional groups in the molecular chain is used. is preferred.
- the resin may be used alone or in combination of two or more.
- the content of the resin in the chemical conversion coating layer 30 is, for example, preferably 0% by mass or more, more preferably 1% by mass or more, relative to the solid content of the coating.
- the content of the resin in the chemical conversion coating layer 30 is, for example, preferably 85% by mass or less, more preferably 60% by mass or less, and 40% by mass or less relative to the solid content of the coating. is more preferred. If the resin content exceeds 85% by mass, the ratio of other film-constituting components decreases, and the performance required of the film other than corrosion resistance may decrease.
- Silane coupling agents include, for example, ⁇ -(2-aminoethyl)aminopropyltrimethoxysilane, ⁇ -(2-aminoethyl)aminopropylmethyldimethoxysilane, ⁇ -(2-aminoethyl)aminopropyltriethoxysilane.
- the addition amount of the silane coupling agent in the chemical conversion agent for forming the chemical conversion coating layer 30 can be, for example, 2 to 80 g/L. If the amount of the silane coupling agent added is less than 2 g/L, the adhesion to the plated surface may be insufficient, and the working adhesion of the coating film may decrease. Further, when the amount of the silane coupling agent added exceeds 80 g/L, the cohesive force of the chemical conversion film layer becomes insufficient, and the working adhesion of the coating film layer may decrease.
- the silane coupling agents as exemplified above may be used alone or in combination of two or more.
- zirconium compound examples include zirconium normal propylate, zirconium normal butyrate, zirconium tetraacetylacetonate, zirconium monoacetylacetonate, zirconium bisacetylacetonate, zirconium monoethylacetoacetate, zirconium acetylacetonate bisethylacetoacetate, Zirconium acetate, zirconium monostearate, zirconium carbonate, zirconium ammonium carbonate, potassium zirconium carbonate, sodium zirconium carbonate and the like can be mentioned.
- the amount of the zirconium compound added in the chemical conversion treatment agent for forming the chemical conversion coating layer 30 can be, for example, 2 to 80 g/L. If the amount of the zirconium compound added is less than 2 g/L, the adhesion to the plated surface may be insufficient, and the working adhesion of the coating film may be reduced. Moreover, when the amount of the zirconium compound added exceeds 80 g/L, the cohesive force of the chemical conversion coating layer may be insufficient, and the processing adhesion of the coating layer may decrease.
- Such zirconium compounds may be used alone or in combination of two or more.
- silica examples include commercially available products such as “Snowtex N”, “Snowtex C”, “Snowtex UP”, and “Snowtex PS” manufactured by Nissan Chemical Industries, Ltd., and “Adelite AT-20Q” manufactured by ADEKA Corporation.
- silica gel, or powdered silica such as Aerosil #300 manufactured by Nippon Aerosil Co., Ltd., or equivalents of these commercially available silica can be used.
- Silica can be appropriately selected according to the required performance of the precoated plated steel sheet.
- the amount of silica added in the chemical conversion treatment agent for forming the chemical conversion coating layer 30 is preferably 1 to 40 g/L, for example. If the amount of silica added is less than 1 g/L, the working adhesion of the coating layer may decrease. is likely to be saturated, so it is uneconomical.
- phosphoric acid and salts thereof examples include phosphoric acids such as orthophosphoric acid, metaphosphoric acid, pyrophosphoric acid, triphosphoric acid and tetraphosphoric acid and salts thereof, ammonium salts such as triammonium phosphate and diammonium hydrogen phosphate, Phosphonic acids such as aminotri(methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetra(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid) and their salts, organic phosphoric acids such as phytic acid and salts thereof.
- phosphoric acids such as orthophosphoric acid, metaphosphoric acid, pyrophosphoric acid, triphosphoric acid and tetraphosphoric acid and salts thereof
- ammonium salts such as triammonium phosphate and diammonium hydrogen phosphate
- Phosphonic acids such as aminotri(methylenephosphonic acid), 1-hydroxyethylidene-1,1-
- salts of phosphoric acid other than ammonium salts include metal salts with Na, Mg, Al, K, Ca, Mn, Ni, Zn, Fe, and the like.
- Phosphoric acid and its salt may be used alone or in combination of two or more.
- the content of phosphoric acid and its salt is, for example, preferably 0% by mass or more, more preferably 1% by mass or more, relative to the solid content of the film. Also, the content of phosphoric acid and its salt is, for example, preferably 20% by mass or less, more preferably 10% by mass or less, relative to the coating solid content. When the content of phosphoric acid and its salt exceeds 20% by mass, the film becomes brittle, and the work followability of the film may deteriorate when the precoated plated steel sheet is formed.
- fluorides include ammonium zircon fluoride, ammonium silicofluoride, ammonium titanium fluoride, sodium fluoride, potassium fluoride, calcium fluoride, lithium fluoride, titanium hydrofluoric acid, and zircon hydrofluoric acid. . Such fluorides may be used alone or in combination of two or more.
- the content of fluoride is, for example, preferably 0% by mass or more, more preferably 1% by mass or more, relative to the solid content of the film.
- the content of fluoride is, for example, preferably 20% by mass or less, more preferably 10% by mass or less, relative to the solid content of the film. If the content of fluoride exceeds 20% by mass, the coating becomes brittle, and the processing followability of the coating may deteriorate when the precoated metal sheet is formed.
- vanadium compound examples include vanadium pentoxide, metavanadic acid, ammonium metavanadate, sodium metavanadate, vanadium oxytrichloride, and other vanadium compounds obtained by reducing pentavalent vanadium compounds to divalent to tetravalent vanadium trioxide. , vanadium dioxide, vanadium oxysulfate, vanadium oxyoxalate, vanadium oxyacetylacetonate, vanadium acetylacetonate, vanadium trichloride, phosphovanadomolybdic acid, vanadium sulfate, vanadium dichloride, vanadium oxide, etc.
- a vanadium compound etc. can be mentioned.
- Such vanadium compounds may be used alone or in combination of two or more.
- the content of the vanadium compound is, for example, preferably 0% by mass or more, more preferably 1% by mass or more, relative to the solid content of the film. Moreover, the content of the vanadium compound is, for example, preferably 20% by mass or less, more preferably 10% by mass or less, relative to the coating solid content. When the content of the vanadium compound exceeds 20% by mass, the film becomes brittle, and the work followability of the film may deteriorate when the precoated metal sheet is formed.
- tannin or tannic acid Both hydrolyzable tannin and condensed tannin can be used as tannin or tannic acid.
- tannins and tannic acids include hamameta tannins, quintuple tannins, gallic tannins, myrobalan tannins, divisibi tannins, algarovira tannins, valonia tannins, catechins, and the like.
- the amount of tannin or tannic acid added to the chemical conversion agent for forming the chemical conversion coating 30 can be 2 to 80 g/L. If the amount of tannin or tannic acid added is less than 2 g/L, the adhesion to the plated surface may be insufficient, and the working adhesion of the coating film may be reduced. If the amount of tannin or tannic acid added exceeds 80 g/L, the cohesive force of the chemical conversion film may be insufficient, and the processing adhesion of the coating film may be reduced.
- an acid, an alkali, or the like may be added to the chemical conversion treatment agent for forming the chemical conversion treatment film 30 for pH adjustment within a range that does not impair the performance.
- the chemical conversion treatment agent containing various components as described above is applied to one or both surfaces of the metal plate 10 and then dried to form the chemical conversion coating layer 30 .
- the adhesion amount of the chemical conversion treatment film layer 40 is more preferably 20 mg/m 2 or more, and still more preferably 50 mg/m 2 or more.
- the adhesion amount of the chemical conversion coating layer 40 is more preferably 800 mg/m 2 or less, and still more preferably 600 mg/m 2 or less.
- the film thickness of the chemical conversion treatment film layer 30 corresponding to such an amount of adhesion depends on the components contained in the chemical conversion treatment agent, but is generally about 0.01 to 1 ⁇ m.
- the film thickness of the chemical conversion coating layer 30 can be measured by direct observation of the cross section in the same manner as the method for measuring the average particle size of the particles 203 .
- the precoated metal sheet according to the present invention will be specifically described while showing examples and comparative examples.
- the examples shown below are merely examples of the precoated metal sheet according to the present invention, and the precoated metal sheet according to the present invention is not limited to the following examples.
- metal plates A1 to A7 shown in Table 1 below were prepared.
- the prepared metal plates were subjected to resin shot or surface polishing under the processing conditions shown in Table 2 in order to obtain the surface shapes shown in Tables 7-1 and 7-2.
- the surface shape was analyzed and determined by the following method.
- the plating adhesion amounts of A1 to A4 were the adhesion amounts shown in Tables 7-1 and 7-2 below.
- plated steel sheets were also prepared by subjecting these metal sheets to 60 mg/m 2 of chromate-free chemical conversion treatment (CT-E300/equivalent to that manufactured by Nihon Parkerizing Co., Ltd.).
- the treatment liquid used for the chemical conversion treatment contains a silane coupling agent as its component, and the film layer formed by such chemical conversion treatment functions as a chemical conversion treatment film layer.
- the presence or absence of chemical conversion treatment is shown in Tables 7-1 and 7-2 below.
- the area ratio of the first region of the metal plate was calculated by the following method. Virtual grid lines were drawn on the surface of the metal plate at intervals of 0.5 mm, a plurality of regions partitioned by the virtual grid lines were set, and the arithmetic mean surface roughness Sa of each region was calculated. A region with an arithmetic mean surface roughness Sa of 1 ⁇ m or more was determined as the first region, and a region with an arithmetic mean surface roughness A of less than 1 ⁇ m was determined as the second region.
- a colored paint used for forming a colored film layer was prepared.
- resins equivalent to those shown in Table 3 below were prepared.
- a melamine-based curing agent (equivalent to Cymel 303/Ornex Co., Ltd.) was added as a curing agent to each resin solution at a solid content ratio of 15% by mass.
- particles equivalent to those shown in Table 4 below were prepared, and added at a predetermined particle size and in a predetermined amount shown in Tables 7-1 and 7-2 below.
- color pigments the same as the aluminum pigment, titanium oxide, and carbon black (CB) shown in Table 5 below are prepared, and added in the predetermined amounts shown in Tables 7-1 and 7-2 below. did.
- rust preventive pigments compounds shown in Table 6 below were prepared and added in predetermined amounts shown in Tables 7-1 and 7-2 below to prepare colored paints.
- the processed part adhesion was evaluated based on the following criteria.
- the prepared sample was subjected to a 90° bending process under the condition of an inner radius of 1 mm in an atmosphere of 20°C, and then a tape peeling test was performed on the outer side of the bent portion.
- the appearance of the tape-peeled portion was evaluated according to the following evaluation criteria.
- Evaluation Criteria 4 Substantially no peeling of the coating film is observed (less than 2% of the peeled area from the bent portion). 3: Slight peeling of the paint film is observed (2% or more and less than 5% of the peeling area from the bent portion). 2: Peeling of the coating film is observed partially (5% or more and less than 20% of the peeling area from the bent portion). 1: Detachment of the coating film is observed as a whole (20% or more of the detachment area from the bent portion).
- the precoated metal sheets corresponding to the examples of the present invention have both excellent appearance and surface contact flaw resistance.
- the precoated metal sheets corresponding to the comparative examples of the present invention are inferior in at least one of appearance and surface contact flaw resistance.
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Abstract
Description
かかる着想に基づき完成された本発明の要旨は、以下の通りである。
[算術平均面粗さSaの測定方法]
前記金属板の表面に、0.5mm間隔で仮想的な格子線を設定し、前記仮想的な格子線によって区間される複数の領域のそれぞれにおいて、ISO 25178で規定される算術平均面粗さSaを測定する。得られた算術平均面粗さSaが1μm以上である領域を前記第1領域とし、得られた算術平均面粗さSaが1μm未満である領域を前記第2領域とする。
(2)前記金属板の表面における前記第1領域の面積率は、片面当たり10~90%である、(1)に記載のプレコート金属板。
(3)前記第2領域の面積率に対する前記第1領域の面積率の比率は、0.3~3.0である、(1)又は(2)に記載のプレコート金属板。
(4)前記着色皮膜層における前記粒子の含有量は、前記着色皮膜層の造膜成分と前記粒子との合計含有量に対し、5~50質量%である、(1)~(3)の何れか1つに記載のプレコート金属板。
(5)前記粒子の平均粒子径は、1~15μmである、(1)~(4)の何れか1つに記載のプレコート金属板。
(6)前記粒子の平均粒子径は、前記着色皮膜層の厚みに対して0.3~2.5倍である、(1)~(5)の何れか1つに記載のプレコート金属板。
(7)前記粒子は、シリカ、セラミックもしくは金属化合物の少なくとも何れかである無機粒子、又は、樹脂粒子の少なくとも何れかである、(1)~(6)の何れか1つに記載のプレコート金属板。
(8)前記粒子は、アクリル系樹脂粒子である、(1)~(7)の何れか1つに記載のプレコート金属板。
(9)前記金属板は、アルミニウム板、亜鉛板、ステンレス板、チタン板、又は、鋼板である、(1)~(8)の何れか1つに記載のプレコート金属板。
(10)前記金属板は、表面にめっき層が設けられためっき鋼板である、(1)~(9)の何れか1つに記載のプレコート金属板。
(11)前記めっき鋼板は、亜鉛系めっき鋼板である、(10)に記載のプレコート金属板。
(12)前記めっき層は、Al:4~22質量%、Mg:1~10質量%、Si:0.0001~2.0000質量%を含有し、残部がZn及び不純物であるめっき層である、(10)又は(11)に記載のプレコート金属板。
(13)前記めっき層の付着量は、前記鋼板の両面での合計で、30~600g/m2である、(10)~(12)の何れか1つに記載のプレコート金属板。
(14)前記着色皮膜層は、着色顔料として、アルミ顔料、カーボンブラック又はTiO2の少なくとも何れかを含有する、(1)~(13)の何れか1つに記載のプレコート金属板。
(15)前記着色皮膜層は、防錆顔料を更に含有する、(1)~(14)の何れか1つに記載のプレコート金属板。
(16)前記金属板と、前記着色皮膜層との間に、化成処理皮膜層を更に備える、(1)~(15)の何れか1つに記載のプレコート金属板。
以下では、図1A及び図1Bを参照しながら、本発明の実施形態に係るプレコート金属板について、詳細に説明する。図1A及び図1Bは、本実施形態に係るプレコート金属板の構造を模式的に示した説明図である。
基材として用いられる金属板については、プレコート金属板1に求められる機械的強度等に応じて、各種の金属板を用いることが可能である。このような金属板としては、例えば、アルミニウム板、亜鉛板、ステンレス板、チタン板、鋼板等を挙げることができる。
Alの含有量を4質量%以上22質量%以下とすることで、鋼板の耐食性が向上する。Alの含有量が4質量%未満である場合には、耐食性が低下する可能性がある。Alの含有量は、好ましくは5質量%以上である。一方、Alの含有量が22質量%を超える場合には、めっき層20の耐食性向上効果が飽和する可能性がある。Alの含有量は、好ましくは16質量%以下である。
Mgの含有量を1質量%以上10質量%以下とすることで、鋼板の耐食性が向上する。Mgの含有量が1質量%未満である場合には、鋼板の耐食性向上効果が不十分となる可能性がある。Mgの含有量は、好ましくは2質量%以上である。一方、Mgの含有量が10質量%を超える場合には、めっき浴でのドロス発生が著しくなり、安定的に溶融めっき鋼板を製造するのが困難となる可能性がある。Mgの含有量は、好ましくは5質量%以下である。
Siの含有量を0.0001質量%以上2.0000質量%以下とすることで、めっき層の密着性を担保することが可能となる。Siの含有量が2.0000質量%を超える場合には、めっき層20の密着性向上効果が飽和する可能性がある。Siの含有量は、より好ましくは1.6000質量%以下である。
続いて、図2を参照しながら、本実施形態に係るプレコート金属板1における金属板10の表面形状について、詳細に説明する。図2は、本実施形態に係るプレコート金属板における金属板の表面形状について説明するための説明図である。
金属板10の表面に、図2に模式的に示したような、0.5mm間隔で仮想的な格子線を設定し、仮想的な格子線によって区間される複数の領域のそれぞれにおいて、表面粗度計を用いISO 25178で規定される算術平均面粗さSaを測定する。得られた算術平均面粗さSaが1μm以上である領域を、第1領域とし、得られた算術平均面粗さSaが1μm未満である領域を、第2領域とする。なお、既に皮膜が存在している場合においては、有機溶剤(例えばMEK(メチルエチルケトン)等)を染みこませたガーゼを用いラビングして、塗膜を除去した上で、上記粗さを測定することが可能である。なお、金属板10としてめっき層の形成されためっき鋼板を用いる場合、めっき層の表面で、上記のような算術平均粗さSaを測定するものとする。
Sa=1/100×Σ[x=1→100](|高さAx-Aave|)
以下、図3を参照しながら、本実施形態に係るプレコート金属板が有する着色皮膜層20について説明する。図3は、本実施形態に係るプレコート金属板が有する着色皮膜層20について説明するための説明図である。
本実施形態に係る化成処理皮膜層30は、金属板10と、着色皮膜層20との間に位置しうる皮膜層であり、金属板10の表面に付着した油分などの不純物及び表面酸化物を、公知の脱脂工程及び洗浄工程で取り除いた後、化成処理により形成される層である。
樹脂は、特に限定されるものではなく、例えば、ポリエステル樹脂、ポリウレタン樹脂、エポキシ樹脂、フェノール樹脂、アクリル樹脂、ポリオレフィン樹脂等といった、公知の有機樹脂を使用することができる。プレコート鋼板用めっき鋼板との密着性を更に高めるためには、分子鎖中に強制部位や極性官能基をもつ樹脂(ポリエステル樹脂、ウレタン樹脂、エポキシ樹脂、アクリル樹脂等)の少なくとも一つを使用することが好ましい。樹脂は、単独で用いてもよく、2種以上を併用してもよい。
シランカップリング剤としては、例えば、γ-(2-アミノエチル)アミノプロピルトリメトキシシラン、γ-(2-アミノエチル)アミノプロピルメチルジメトキシシラン、γ-(2-アミノエチル)アミノプロピルトリエトキシシラン、γ-(2-アミノエチル)アミノプロピルメチルジエトキシシラン、γ-(2-アミノエチル)アミノプロピルメチルジメトキシシラン、γ-メタクリロキシプロピルトリメトキシシラン、γ-メタクリロキシプロピルメチルジメトキシシラン、γ-メタクリロキシプロピルトリエトキシシラン、γ-メタクリロキシプロピルメチルジエトキシシラン、N-β-(N-ビニルベンジルアミノエチル)-γ-アミノプロピルトリメトキシシラン、N-β-(N-ビニルベンジルアミノエチル)-γ-アミノプロピルメチルジメトキシシラン、N-β-(N-ビニルベンジルアミノエチル)-γ-アミノプロピルトリエトキシシラン、N-β-(N-ビニルベンジルアミノエチル)-γ-アミノプロピルメチルジエトキシシラン、γ-グリシドキシプロピルトリメトキシシラン、γ-グリシドキシプロピルメチルジメトキシシラン、γ-グリシドキシプロピルトリエトキシシラン、γ-グリシドキシプロピルメチルジエトキシシラン、γ-メルカプトプロピルトリメトキシシラン、γ-メルカプトプロピルメチルジメトキシシラン、γ-メルカプトプロピルトリエトキシシラン、γ-メルカプトプロピルメチルジエトキシシラン、メチルトリメトキシシラン、ジメチルジメトキシシラン、メチルトリエトキシシラン、ジメチルジエトキシシラン、ビニルトリアセトキシシラン、γ-クロロプロピルトリメトキシシラン、γ-クロロプロピルメチルジメトキシシラン、γ-クロロプロピルトリエトキシシラン、γ-クロロプロピルメチルジエトキシシラン、ヘキサメチルジシラザン、γ-アニリノプロピルトリメトキシシラン、γ-アニリノプロピルメチルジメトキシシラン、γ-アニリノプロピルトリエトキシシラン、γ-アニリノプロピルメチルジエトキシシラン、ビニルトリメトキシシラン、ビニルメチルジメトキシシラン、ビニルトリエトキシシラン、ビニルメチルジエトキシシラン、オクタデシルジメチル[3-(トリメトキシシリル)プロピル]アンモニウムクロライド、オクタデシルジメチル[3-(メチルジメトキシシリル)プロピル]アンモニウムクロライド、オクタデシルジメチル[3-(トリエトキシシリル)プロピル]アンモニウムクロライド、オクタデシルジメチル[3-(メチルジエトキシシリル)プロピル]アンモニウムクロライド、γ-クロロプロピルメチルジメトキシシラン、γ-メルカプトプロピルメチルジメトキシシラン、メチルトリクロロシラン、ジメチルジクロロシラン、トリメチルクロロシラン等を挙げることができる。化成処理皮膜層30を形成するための化成処理剤中のシランカップリング剤の添加量は、例えば、2~80g/Lとすることができる。シランカップリング剤の添加量が2g/L未満である場合にはめっき表面との密着性が不足し、塗膜の加工密着性が低下する可能性がある。また、シランカップリング剤の添加量が80g/Lを超える場合には、化成処理皮膜層の凝集力が不足し、塗膜層の加工密着性が低下する可能性がある。上記に例示したようなシランカップリング剤は、1種で使用してもよく、2種以上を併用してもよい。
ジルコニウム化合物としては、例えば、ジルコニウムノルマルプロピレート、ジルコニウムノルマルブチレート、ジルコニウムテトラアセチルアセトネート、ジルコニウムモノアセチルアセトネート、ジルコニウムビスアセチルアセトネート、ジルコニウムモノエチルアセトアセテート、ジルコニウムアセチルアセトネートビスエチルアセトアセテート、ジルコニウムアセテート、ジルコニウムモノステアレート、炭酸ジルコニウム、炭酸ジルコニウムアンモ二ウム、炭酸ジルコニウムカリウム、炭酸ジルコニウムナトリウム等を挙げることができる。化成処理皮膜層30を形成するための化成処理剤中のジルコニウム化合物の添加量は、例えば、2~80g/Lとすることができる。ジルコニウム化合物の添加量が2g/L未満である場合にはめっき表面との密着性が不足し、塗膜の加工密着性が低下する可能性がある。また、ジルコニウム化合物の添加量が80g/Lを超える場合には、化成処理皮膜層の凝集力が不足し、塗膜層の加工密着性が低下する可能性がある。かかるジルコニウム化合物は、単独で用いてもよく、2種以上を併用してもよい。
シリカとしては、例えば、日産化学株式会社製の「スノーテックスN」、「スノーテックスC」、「スノーテックスUP」、「スノーテックスPS」、株式会社ADEKA製の「アデライトAT-20Q」等の市販のシリカゲル、もしくは、日本アエロジル株式会社製のアエロジル#300等の粉末シリカ、又は、これら市販のシリカと同等のものを用いることができる。シリカは、必要とされるプレコートめっき鋼板の性能に応じて、適宜選択することができる。化成処理皮膜層30を形成するための化成処理剤中のシリカの添加量は、例えば、1~40g/Lとすることが好ましい。シリカの添加量が1g/L未満である場合には、皮膜層の加工密着性が低下する可能性があり、シリカの添加量が40g/Lを超える場合には、加工密着性及び耐食性の効果が飽和する可能性が高いことから、不経済である。
リン酸及びその塩としては、例えば、オルトリン酸、メタリン酸、ピロリン酸、三リン酸、四リン酸等のリン酸類及びそれらの塩、リン酸三アンモニウム、リン酸水素二アンモニウム等のアンモニウム塩、アミノトリ(メチレンホスホン酸)、1-ヒドロキシエチリデン-1,1-ジホスホン酸、エチレンジアミンテトラ(メチレンホスホン酸)、ジエチレントリアミンペンタ(メチレンホスホン酸)等のホスホン酸類及びそれらの塩、フィチン酸等の有機リン酸類及びそれらの塩等が挙げられる。なお、リン酸の塩として、アンモニウム塩以外の塩としては、Na、Mg、Al、K、Ca、Mn、Ni、Zn、Fe等との金属塩が挙げられる。リン酸及びその塩は、単独で用いてもよく、2種以上を併用してもよい。
フッ化物としては、例えば、ジルコンフッ化アンモニウム、ケイフッ化アンモニウム、チタンフッ化アンモニウム、フッ化ナトリウム、フッ化カリウム、フッ化カルシウム、フッ化リチウム、チタンフッ化水素酸、ジルコンフッ化水素酸等を挙げることができる。かかるフッ化物は、単独で用いてもよく、2種以上を併用してもよい。
バナジウム化合物としては、例えば、五酸化バナジウム、メタバナジン酸、メタバナジン酸アンモニウム、メタバナジン酸ナトリウム、オキシ三塩化バナジウム等の5価のバナジウム化合物を還元剤で2~4価に還元したバナジウム化合物、三酸化バナジウム、二酸化バナジウム、オキシ硫酸バナジウム、オキシ蓚酸バナジウム、バナジウムオキシアセチルアセトネート、バナジウムアセチルアセトネート、三塩化バナジウム、リンバナドモリブデン酸、硫酸バナジウム、二塩化バナジウム、酸化バナジウム等の酸化数4~2価のバナジウム化合物等を挙げることができる。かかるバナジウム化合物は、単独で用いてもよく、2種以上を併用してもよい。
タンニン又はタンニン酸は、加水分解できるタンニン、縮合タンニンのいずれも用いることができる。タンニン及びタンニン酸の例としては、ハマメタタンニン、五倍子タンニン、没食子タンニン、ミロバランのタンニン、ジビジビのタンニン、アルガロビラのタンニン、バロニアのタンニン、カテキン等を挙げることができる。化成処理皮膜30を形成するための化成処理剤中のタンニン又はタンニン酸の添加量は、2~80g/Lとすることができる。タンニン又はタンニン酸の添加量が2g/L未満である場合にはめっき表面との密着性が不足し、塗膜の加工密着性が低下する可能性がある。また、タンニン又はタンニン酸の添加量の添加量が80g/Lを超える場合には、化成処理皮膜の凝集力が不足し、塗膜の加工密着性が低下する可能性がある。
以下の表1に示す、A1~A7の7種類の金属板を準備した。準備した金属板に対し、表7-1、表7-2に示す表面形状を得るべく、表2に記載のような加工条件にて、樹脂ショット又は表面研磨を実施した。なお、表面形状は、下記手法により分析し決定した。また、A1~A4のめっき付着量は、以下の表7-1、表7-2に示す付着量とした。更に、これら金属板に対して、クロメートフリー系化成処理(CT-E300/日本パーカライジング社製と同等のもの)を60mg/m2施しためっき鋼板も準備した。化成処理に用いた処理液は、その成分としてシランカップリング剤を含有するものであり、かかる化成処理により形成される皮膜層は、化成処理皮膜層として機能する。なお、化成処理の有無は、以下の表7-1、表7-2に記載した。
着色皮膜層を形成した後の金属板を用い、MEKを染みこませたガーゼを用いて着色皮膜層をラビングして、着色皮膜層を除去した。その上で、金属板の第一領域の面積率を、下記手法により算出した。金属板の表面に、0.5mm間隔で仮想格子線を描き、仮想格子線によって区画される複数の領域を設定し、各領域の算術平均面粗さSaを算出した。そして、算術平均面粗さSaが1μm以上の領域を第1領域と判別し、算術平均面粗さAが1μm未満の領域を第2領域と判別した。算術平均面粗さSaの測定は、3Dレーザー顕微鏡(株式会社キーエンス製、VK-9710)を用いて行った。20倍の標準レンズを用いて、仮想格子線によって区画される複数の領域のそれぞれにおいて、測定間隔50μmで領域内の高さAを測定した。得られた高さA100点を高さA1~高さA100とし、下記の式を用いてSaを算出した。Aaveは、高さA100点の平均とした。
Sa=1/100×Σ[x=1→100](|高さAx-Aave|)
着色皮膜層の形成に用いる着色塗料を調製した。
造膜成分として機能するバインダー樹脂として、以下の表3に示す樹脂と同等のものを用意した。各樹脂溶液に対し、硬化剤としてメラミン系硬化剤(サイメル303/オルネクス社製と同等のもの)を、固形分割合で15質量%添加した。更に、以下の表4に示す粒子と同等のものを準備し、以下の表7-1、表7-2に示した所定粒径・所定量で添加した。また、着色顔料として、以下の表5に示したアルミ顔料、酸化チタン、カーボンブラック(CB)と同等のものを準備し、以下の表7-1、表7-2に示した所定量で添加した。また、防錆顔料として、以下の表6に示す化合物を準備し、以下の表7-1、表7-2に示した所定量で添加し、着色塗料を調製した。
上記のようにして調製した着色塗料を、バーコータを用いてめっき鋼板に塗布し、60秒で最高到達板温度(PMT)が200℃になるように加熱して、着色皮膜層を形成した。なお、作成した着色皮膜層の厚みは、先だって説明した方法に即して断面観察により測定し、得られた結果を、表7-1、表7-2に示した。
上記方法により作製した各サンプルについて、以下のような基準に基づき性能を評価した。得られた評価結果を、以下の表8-1、表8-2にあわせて示した。
作製したサンプルの外観を以下の基準により評価し、評点2以上を合格とし、評点1を不合格とした。
評価基準
3:評価面において、均一な着色皮膜外観が95%以上である。
2:評価面において、均一な着色皮膜外観が80%以上95%未満である。
1:ワキ発生等により、評価面において、均一な着色皮膜外観が80%未満である。
以下のような手法により、耐面接触疵性を評価した。作製したサンプルを50mm角に切断して、塗装面を上にした状態で固定した。その上に、50mm角に切断した電気亜鉛めっき鋼板を重ね、8.5kgf/cm2(1kgfは、約9.8Nである。)の条件で加圧した状態で90度回転させた後に、塗装面の状態を以下のような基準で評価し、評点3以上を合格とした。
評価基準
7:塗膜剥離・加圧による光沢変化とも、ほとんど認められない。
(接触部からの剥離が2%未満)
6:塗膜剥離はほとんど認められず、加圧による光沢変化が一部認められる。
(接触部からの剥離が2%未満)
5:極僅かに塗膜剥離が認められ、加圧による光沢変化が一部認められる。
(接触部からの剥離が2%以上5%未満)
4:僅かに塗膜剥離が認められ、加圧による光沢変化が一部認められる。
(接触部からの剥離が5%以上10%未満)
3:僅かに塗膜剥離が認められ、加圧による光沢変化が認められる。
(接触部からの剥離が5%以上10%未満)
2:塗膜剥離が認められ、加圧による著しい光沢変化が認められる。
(接触部からの剥離が10%以上20%未満)
1:塗膜剥離が著しい。
(接触部からの剥離が20%以上)
参考性能として、以下のような基準に基づき加工部密着性を評価した。作製したサンプルに対して、20℃雰囲気中で内R1mmの条件で90°折り曲げ加工を施した後、折り曲げ加工部外側のテープ剥離試験を実施した。テープ剥離部の外観を下記の評価基準で評価した。
評価基準
4:塗膜剥離はほぼ認められない(曲げ加工部からの剥離面積2%未満)。
3:僅かに塗膜剥離が認められる(曲げ加工部からの剥離面積2%以上5%未満)。
2:部分的に塗膜剥離が認められる(曲げ加工部からの剥離面積5%以上20%未満)。
1:全体的に塗膜剥離が認められる(曲げ加工部からの剥離面積20%以上)。
参考性能として、以下のような基準に基づき耐食性を評価した。試験板の端面をテープシールした後、JIS Z 2371に準拠した塩水噴霧試験(SST)を72時間行い、錆発生状況を観察し、下記の評価基準で評価した。
評価基準
6:白錆発生面積が1%未満で赤錆発生なし。
5:錆発生面積が1%以上2%未満で赤錆発生なし。
4:錆発生面積が2%以上3%未満で赤錆発生なし。
3:錆発生面積が3%以上4%未満で赤錆発生なし。
2:錆発生面積が4%以上5%未満で赤錆発生なし。
1:錆発生面積が5%以上、又は、赤錆発生。
10 金属板
20 着色皮膜層
30 化成処理皮膜層
201 造膜成分
203 粒子
Claims (16)
- 金属板と、
前記金属板上に位置する着色皮膜層と、
を備え、
前記金属板の少なくとも前記着色皮膜層が位置する側の表面には、下記の算術平均面粗さSaの測定方法により特定される第1領域と第2領域とが存在し、
前記着色皮膜層は、厚みが1~10μm以上であり、かつ、当該厚み以上の粒子径を有する粒子を含有する、プレコート金属板。
[算術平均面粗さSaの測定方法]
前記金属板の表面に、0.5mm間隔で仮想的な格子線を設定し、前記仮想的な格子線によって区間される複数の領域のそれぞれにおいて、ISO 25178で規定される算術平均面粗さSaを測定する。得られた算術平均面粗さSaが1μm以上である領域を前記第1領域とし、得られた算術平均面粗さSaが1μm未満である領域を前記第2領域とする。 - 前記金属板の表面における前記第1領域の面積率は、片面当たり10~90%である、請求項1に記載のプレコート金属板。
- 前記第2領域の面積率に対する前記第1領域の面積率の比率は、0.3~3.0である、請求項1又は2に記載のプレコート金属板。
- 前記着色皮膜層における前記粒子の含有量は、前記着色皮膜層の造膜成分と前記粒子との合計含有量に対し、5~50質量%である、請求項1~3の何れか1項に記載のプレコート金属板。
- 前記粒子の平均粒子径は、1~15μmである、請求項1~4の何れか1項に記載のプレコート金属板。
- 前記粒子の平均粒子径は、前記着色皮膜層の厚みに対して0.3~2.5倍である、請求項1~5の何れか1項に記載のプレコート金属板。
- 前記粒子は、シリカ、セラミックもしくは金属化合物の少なくとも何れかである無機粒子、又は、樹脂粒子の少なくとも何れかである、請求項1~6の何れか1項に記載のプレコート金属板。
- 前記粒子は、アクリル系樹脂粒子である、請求項1~7の何れか1項に記載のプレコート金属板。
- 前記金属板は、アルミニウム板、亜鉛板、ステンレス板、チタン板、又は、鋼板である、請求項1~8の何れか1項に記載のプレコート金属板。
- 前記金属板は、表面にめっき層が設けられためっき鋼板である、請求項1~9の何れか1項に記載のプレコート金属板。
- 前記めっき鋼板は、亜鉛系めっき鋼板である、請求項10に記載のプレコート金属板。
- 前記めっき層は、Al:4~22質量%、Mg:1~10質量%、Si:0.0001~2.0000質量%を含有し、残部がZn及び不純物であるめっき層である、請求項10又は11に記載のプレコート金属板。
- 前記めっき層の付着量は、前記鋼板の両面での合計で、30~600g/m2である、請求項10~12の何れか1項に記載のプレコート金属板。
- 前記着色皮膜層は、着色顔料として、アルミ顔料、カーボンブラック又はTiO2の少なくとも何れかを含有する、請求項1~13の何れか1項に記載のプレコート金属板。
- 前記着色皮膜層は、防錆顔料を更に含有する、請求項1~14の何れか1項に記載のプレコート金属板。
- 前記金属板と、前記着色皮膜層との間に、化成処理皮膜層を更に備える、請求項1~15の何れか1項に記載のプレコート金属板。
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JP7001214B1 (ja) * | 2020-07-15 | 2022-01-19 | 日本製鉄株式会社 | プレコート金属板、火傷防止カバー及びプレコート金属板の製造方法 |
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2022
- 2022-03-25 CN CN202280036677.3A patent/CN117396334A/zh active Pending
- 2022-03-25 EP EP22775844.8A patent/EP4296049A4/en active Pending
- 2022-03-25 US US18/283,989 patent/US20240158651A1/en active Pending
- 2022-03-25 KR KR1020237035036A patent/KR20230157433A/ko unknown
- 2022-03-25 TW TW111111471A patent/TWI801184B/zh active
- 2022-03-25 WO PCT/JP2022/014585 patent/WO2022203063A1/ja active Application Filing
- 2022-03-25 JP JP2022562878A patent/JP7252506B2/ja active Active
- 2022-03-25 AU AU2022243365A patent/AU2022243365A1/en active Pending
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JP2001323358A (ja) * | 2000-03-07 | 2001-11-22 | Nkk Corp | 合金化溶融亜鉛めっき鋼板 |
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Also Published As
Publication number | Publication date |
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US20240158651A1 (en) | 2024-05-16 |
EP4296049A4 (en) | 2024-07-31 |
TW202243885A (zh) | 2022-11-16 |
TWI801184B (zh) | 2023-05-01 |
KR20230157433A (ko) | 2023-11-16 |
EP4296049A1 (en) | 2023-12-27 |
JPWO2022203063A1 (ja) | 2022-09-29 |
CN117396334A (zh) | 2024-01-12 |
AU2022243365A1 (en) | 2023-09-28 |
JP7252506B2 (ja) | 2023-04-05 |
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