JP5729230B2 - 容器用鋼板およびその製造方法 - Google Patents
容器用鋼板およびその製造方法 Download PDFInfo
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- JP5729230B2 JP5729230B2 JP2011201752A JP2011201752A JP5729230B2 JP 5729230 B2 JP5729230 B2 JP 5729230B2 JP 2011201752 A JP2011201752 A JP 2011201752A JP 2011201752 A JP2011201752 A JP 2011201752A JP 5729230 B2 JP5729230 B2 JP 5729230B2
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- layer
- steel plate
- film
- amount
- steel sheet
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 title claims description 101
- 239000010959 steel Substances 0.000 title claims description 101
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000010410 layer Substances 0.000 claims description 90
- 238000000034 method Methods 0.000 claims description 40
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- 150000001261 hydroxy acids Chemical class 0.000 claims description 31
- 238000007747 plating Methods 0.000 claims description 30
- 239000000126 substance Substances 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 239000000956 alloy Substances 0.000 claims description 21
- 229910045601 alloy Inorganic materials 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000000243 solution Substances 0.000 claims description 14
- 229910052718 tin Inorganic materials 0.000 claims description 14
- 229910020938 Sn-Ni Inorganic materials 0.000 claims description 12
- 229910008937 Sn—Ni Inorganic materials 0.000 claims description 12
- 150000002500 ions Chemical class 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 239000002335 surface treatment layer Substances 0.000 claims description 10
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims description 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 4
- QBYIENPQHBMVBV-HFEGYEGKSA-N (2R)-2-hydroxy-2-phenylacetic acid Chemical compound O[C@@H](C(O)=O)c1ccccc1.O[C@@H](C(O)=O)c1ccccc1 QBYIENPQHBMVBV-HFEGYEGKSA-N 0.000 claims description 3
- RBNPOMFGQQGHHO-UHFFFAOYSA-N -2,3-Dihydroxypropanoic acid Natural products OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 claims description 3
- RBNPOMFGQQGHHO-UWTATZPHSA-N D-glyceric acid Chemical compound OC[C@@H](O)C(O)=O RBNPOMFGQQGHHO-UWTATZPHSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 3
- IWYDHOAUDWTVEP-UHFFFAOYSA-N R-2-phenyl-2-hydroxyacetic acid Natural products OC(=O)C(O)C1=CC=CC=C1 IWYDHOAUDWTVEP-UHFFFAOYSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 239000004310 lactic acid Substances 0.000 claims description 3
- 235000014655 lactic acid Nutrition 0.000 claims description 3
- 229960002510 mandelic acid Drugs 0.000 claims description 3
- 239000011975 tartaric acid Substances 0.000 claims description 3
- 235000002906 tartaric acid Nutrition 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 2
- 239000010408 film Substances 0.000 description 91
- 229920005989 resin Polymers 0.000 description 36
- 239000011347 resin Substances 0.000 description 36
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 33
- 238000005260 corrosion Methods 0.000 description 27
- 230000007797 corrosion Effects 0.000 description 26
- 238000000576 coating method Methods 0.000 description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 16
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- 238000005097 cold rolling Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010306 acid treatment Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
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- 229910052726 zirconium Inorganic materials 0.000 description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000005029 tin-free steel Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
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- 238000007654 immersion Methods 0.000 description 4
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- 238000003466 welding Methods 0.000 description 4
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 3
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 3
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- 229910052742 iron Inorganic materials 0.000 description 3
- 238000010409 ironing Methods 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 229910001128 Sn alloy Inorganic materials 0.000 description 2
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 2
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- 235000013361 beverage Nutrition 0.000 description 2
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- 125000000524 functional group Chemical group 0.000 description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
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- 239000002985 plastic film Substances 0.000 description 2
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- FZUJWWOKDIGOKH-UHFFFAOYSA-N sulfuric acid hydrochloride Chemical compound Cl.OS(O)(=O)=O FZUJWWOKDIGOKH-UHFFFAOYSA-N 0.000 description 2
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229920001634 Copolyester Polymers 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229910017091 Fe-Sn Inorganic materials 0.000 description 1
- 229910017136 Fe—Ni—Sn Inorganic materials 0.000 description 1
- 229910017142 Fe—Sn Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910020900 Sn-Fe Inorganic materials 0.000 description 1
- 229910019314 Sn—Fe Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- 239000010953 base metal Substances 0.000 description 1
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
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- 239000012611 container material Substances 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
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- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
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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
- 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
-
- 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
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- 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
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- 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
-
- 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
-
- 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
- C23C22/34—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 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
- C23C22/05—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
- C23C22/34—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 fluorides or complex fluorides
- C23C22/36—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 fluorides or complex fluorides 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
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
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- C—CHEMISTRY; METALLURGY
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Description
(1)Zrイオン、Fイオンを含む溶液中で、鋼板を浸漬又は電解処理して形成される、付着量が、金属Zr量で0.1〜100mg/m2、F量で0.1mg/m2以下の化成皮膜と、該化成皮膜上に、付着量が、C量で0.05〜50mg/m2であるヒドロキシ酸処理層とを有する、容器用鋼板。
(2)前記溶液中にさらにリン酸イオンを含み、前記化成皮膜の付着量が、さらにP量で0.1〜50mg/m2である(1)に記載の容器用鋼板。
(3)前記ヒドロキシ酸が、クエン酸、酒石酸、グリコール酸、乳酸、グリセリン酸およびマンデル酸から選択される少なくとも1つである(1)または(2)に記載の容器用鋼板。
(4)前記鋼板は、少なくとも片面に、Niを5〜1000mg/m2またはSnを100〜15000mg/m2を含む表面処理層を有する表面処理鋼板である、(1)〜(3)のいずれかに記載の容器用鋼板。
(5)前記鋼板は、Niを5〜150mg/m2含む、NiめっきまたはFe−Ni合金めっき相である下地Ni層と、前記下地Ni層の上に300〜3000mg/m2のSnめっきされ、溶融溶錫処理により前記下地Ni層の一部または全部と前記Snめっき層の一部が合金化され、Sn−Ni合金層もしくはFe−Sn−Ni合金層の単一層からなる中間層、最下層にNi層、その上面にSn−Ni合金層の複合層からなる中間層、又は最下層にFe−Ni層、その上面にFe−Sn−Ni合金層の複合層からなる中間層を有し、さらに前記中間層の上面に前記Snめっき層の合金化していない残部から形成された島状のSnめっき層とを有する表面処理鋼板である、(1)〜(4)のいずれかに記載の容器用鋼板。
(6)上記(1)〜(5)のいずれかに記載の容器用鋼板の製造方法であって、
Zrイオン、Fイオンを含む溶液中で、鋼板を浸漬又は電解処理し、
鋼板上に付着量が、金属Zr量で0.1〜100mg/m2、F量で0.1mg/m2以下の化成皮膜を形成し、該化成皮膜を有する鋼板をヒドロキシ酸を含む水溶液中に浸漬する、または該化成皮膜上にヒドロキシ酸を含む水溶液を塗布し、乾燥する、(1)〜(5)のいずれかに記載の容器用鋼板の製造方法。
(7)前記乾燥工程の温度が、70℃以上である(6)に記載の容器用鋼板の製造方法。
(8)前記乾燥工程の後に、80℃以上の温度の水で洗浄し、さらに乾燥することを特徴とする、(6)または(7)に記載の容器用鋼板の製造方法。
表面処理鋼板は、鋼板の少なくとも一方の面にSn(錫)またはNi(ニッケル)を含む表面処理層を有する。表面処理層は特に限定されないが、片面当たり、Niを5〜1000mg/m2またはSnを100〜15000mg/m2含むのが好ましい。
めっき層のSn付着量が、100mg/m2未満では耐食性に劣る傾向がある。一方、3000mg/m2超えではめっき層が厚くなりすぎるため、コスト的なメリットが少なくなる場合がある。尚、Sn付着量は、電解剥離法又は蛍光X線による表面分析により測定することができる。
鋼板上に直接、または、これらのNi、Snの1種以上を含む表面処理層の上層に、Zr化合物とFとを含む化成皮膜が付与され化成皮膜鋼板を得る。これらの皮膜を付与する方法は、Zrイオン、Fイオンを溶解させた酸性水溶液に鋼板を浸漬する方法や陰極電解処理により行う方法がある。浸漬処理では、下地をエッチングして各種の皮膜が形成される為、処理時間が長くなる為、工業生産的には不利である。一方、陰極電解処理では、強制的な電荷移動および鋼板界面での水素発生による表面清浄化とpH上昇による付着促進効果も相俟って、均一な皮膜を得る事が出来る。更に、この陰極電解処理において、処理液中に硝酸イオンとアンモニウムイオンが共存すると、数秒から数十秒程度の短時間処理で耐食性や密着性の向上効果に優れたZr酸化物、またはZrリン酸化物を含むZr化合物皮膜の析出を促進する事が可能であることから、工業的に有利である。従って、化成皮膜の付与には陰極電解処理が望ましく、特に硝酸イオンとアンモニウムイオンを共存させた処理液での陰極電解処理が好ましい。
ジルコニウム皮膜の付着量は、金属ジルコニウム量で0.1mg/m2〜9mg/m2が好ましい。より好ましくは、ジルコニウム皮膜の付着量は、金属ジルコニウム量で1mg/m2〜8mg/m2である。ジルコニウム皮膜の付着量をこの範囲とすることにより、レトルト後の耐食性が確保できるとともに、均質性高く加工性に優れた皮膜を得ることができる。
上記のようにして得られた化成皮膜上にヒドロキシ酸処理層を付与する。付与する方法は限定されないが、ヒドロキシ酸水溶液に化成皮膜鋼板を浸漬するか、ヒドロキシ酸水溶液を化成皮膜上に塗布する方法が好適である。浸漬または塗布後に乾燥する。乾燥温度は限定されないが70℃以上が好ましい。短時間で充分な乾燥ができるからである。
ヒドロキシ酸は、1分子中にカルボキシル基とアルコール性水酸基とを持つ有機化合物の総称であり、本発明では、クエン酸、酒石酸、グリコール酸、乳酸、グリセリン酸、マンデル酸などの中から選ばれた少なくとも1種の酸を用いることができる。ヒドロキシ酸は1種でも2種以上混合して用いてもよい。また、ヒドロキシ酸にフェノール樹脂を混合して用いてもよい。混合率は有機物成分の50質量%未満とする。
このヒドロキシ酸処理層の形成方法としては、上記のヒドロキシ酸を水または有機溶剤に溶解し、溶液として鋼板上に塗布した後、乾燥する方法が好適である。塗布方法としては、各種公知のコーティング法を用いることができる。乾燥時間短縮のために、必要に応じて鋼板を加熱する工程を設けてもよい。なお、乾燥によって皮膜を形成した後は、水洗工程を経ることによって金属上に残存した過剰なヒドロキシ酸および・またはFを除去することが好ましい。この場合、特に強力な水洗である必要はなく、水槽に浸漬、あるいは水スプレー程度で十分である。水洗後は、再度乾燥し、実用に供することができる。
本発明の鋼板上にZr化合物化成皮膜とヒドロキシ酸処理層を有する本発明の密着性皮膜は、ヒドロキシ酸処理層が官能基の多い界面を構成するので、さらに上層に樹脂被覆層を形成するとヒドロキシ酸処理層とその上層とのフイルム密着性が高い。
本発明の容器用鋼板は、上記の化成皮膜上に、樹脂を被覆して樹脂被覆鋼板を製造することができる。上述したように、本発明の容器用鋼板は、高加工部のフイルム密着性(高フイルム密着性)に優れている。これは、ヒドロキシ酸処理層が多数の官能基を有し、樹脂フイルム(有機樹脂)と化学的に結合するためであると考えられる。
容器用鋼板原板または表面処理鋼板に被覆する樹脂としては、特に限定はなく、各種熱可塑性樹脂や熱硬化性樹脂を挙げることができる。例えば、ポリエチレン、ポリプロピレン、エチレン−プロピレン共重合体、エチレン−酢酸ビニル共重合体、エチレン−アクリルエステル共重合体、アイオノマー等のオレフィン系樹脂フィルム、またはポリブチレンテレフタラート等のポリエステルフィルム、もしくはナイロン6、ナイロン6,6、ナイロン11、ナイロン12等のポリアミドフィルム、ポリ塩化ビニルフィルム、ポリ塩化ビニリデンフィルム等の熱可塑性樹脂フィルムの未延伸または二軸延伸したものであってもよい。積層の際に接着剤を用いる場合は、ウレタン系接着剤、エポキシ系接着剤、酸変性オレフィン樹脂系接着剤、コポリアミド系接着剤、コポリエステル系接着剤(厚さ:0.1〜5.0μm)等が好ましく用いられる。さらに熱硬化性塗料を、厚み0.05〜2μmの範囲で表面処理鋼板側、あるいはフィルム側に塗布し、これを接着剤としてもよい。
さらに、フェノールエポキシ、アミノ−エポキシ等の変性エポキシ塗料、塩化ビニル−酢酸ビニル共重合体、塩化ビニル−酢酸ビニル共重合体けん化物、塩化ビニル−酢酸ビニル−無水マレイン酸共重合体、エポキシ変性−、エポキシアミノ変性−、エポキシフェノール変性−ビニル塗料または変性ビニル塗料、アクリル塗料、スチレン−ブタジエン系共重合体等の合成ゴム系塗料等の熱可塑性または熱硬化性塗料の単独または2種以上の組合わせであってもよい。
樹脂被覆層の厚みは3〜50μm、特に5〜40μmの範囲にすることが望ましい。厚みが上記範囲を下回ると耐食性が不十分となり、厚みが上記範囲を上回ると加工性の点で問題が生じやすいためである。
こうした樹脂被覆鋼板は、側面継ぎ目を有するスリーピース缶やシームレス缶(ツーピース缶)に適用することができる。また、ステイ・オン・タブタイプのイージーオープン缶蓋やフルオープンタイプのイージーオープン缶蓋等に適用することができる。
金属缶の製造方法は、前述した樹脂被覆鋼板から形成されている限り、任意の製缶法を用いることができる。この金属缶は、側面継ぎ目を有するスリーピース缶であることもできるが、一般にシームレス缶(ツーピース缶)であることが好ましい。このシームレス缶は、樹脂被覆鋼板の有機樹脂の被覆面が缶内面側となるように、絞り・再絞り加工、絞り・再絞りによる曲げ伸ばし加工(ストレッチ加工)、絞り・再絞りによる曲げ伸ばし・しごき加工、あるいは絞り・しごき加工、ネック部のネッキング加工等の従来公知の加工方法で製造できる。
上述の説明は、この発明の実施形態の一例を説明したに過ぎず、本発明の請求の範囲内において種々の変更を加えることができる。
以下の処理法(1)〜(6)の方法を用いて、板厚0.17〜0.23mmの鋼板上に表面処理層を付与した。
(処理法1)冷間圧延後、焼鈍、調圧された原板を脱脂、酸洗後、フェロスタン浴を用いてSnをめっきし、Snめっき鋼板を作製した。
(処理法2)冷間圧延後、ワット浴を用いてNiめっきを施し、焼鈍時にNi拡散層を形成させ、Niめっき鋼板を作製した。
(処理法3)冷間圧延後、焼鈍、調圧された原板を脱脂、酸洗後、フェロスタン浴を用いてSnをめっきし、その後、リフロー処理を行い、Sn合金層を有するSnめっき鋼板を作製した。
(処理法4)冷間圧延後、焼鈍、調圧された原板を脱脂、酸洗後、硫酸−塩酸浴を用いてFe−Ni合金めっきを施し、引き続き、フェロスタン浴を用いてSnめっきを施し、Ni、Snめっき鋼板を作製した。
(処理法5)冷間圧延後、焼鈍、調圧された原板を脱脂、酸洗後、硫酸−塩酸浴を用いてSn−Ni合金鍍金を施し、Ni、Snめっき鋼板を作製した。
(処理法6)冷間圧延後、厚さが0.17〜0.23mmの鋼基材(鋼板)を、脱脂及び酸洗した後、ワット浴を用いてNiめっきを施し、焼鈍によりNi拡散層を形成後、引き続き、フェロスタン浴を用いてSnめっきを施し、その後、溶融溶錫処理を行い、Sn−Ni合金層を有するSnめっき鋼板を作製した。
島状Sn形成状況を光学顕微鏡にて表面を観察し、実施例7、8で全体的に島が形成されていることを確認した。
上記の処理により表面処理層を付与した後、以下の処理法で化成皮膜を付与した。
(A法)フッ化Zr4000質量ppm、リン酸300質量ppm、フェノール樹脂0または700質量ppm、硝酸アンモン10000質量ppmを溶解させた処理液に、上記鋼板を浸漬し、Zr化合物−フェノール樹脂皮膜を形成した。
(B法)フッ化Zr1500質量ppm、リン酸400質量ppm、フェノール樹脂0または500質量ppm、硝酸アンモンニウム5000質量ppmを溶解させた処理液に、上記鋼板を浸漬、陰極電解してZr化合物−フェノール樹脂皮膜を付与した。陰極電解処理の電流密度(A/dm2)と時間(秒)を、表1に示した。「−」は処理しないまたは検出されなかったことを示す。
(C法)フッ化Zrカリウム1500〜4300質量ppm、リン酸300〜1500質量ppm、硝酸アンモンモニウム1000〜7000質量ppmを溶解させた処理液に、上記鋼板を浸漬または、陰極電解してZr化合物を有する化成皮膜(実施例)を付与した。陰極電解処理の電流密度(A/dm2)と時間(秒)を、表1に示した。
形成された化成皮膜上に、表1に示すヒドロキシ酸の表1の濃度の水溶液をロールコーターを用いて塗布した。あるいは、浸漬してロール絞りを行った。
上記の処理によりヒドロキシ酸処理層を付与した後、下記工程で乾燥し水洗処理を行い、皮膜中のF量を制御し、その後乾燥した。
(W1法)70℃で乾燥し、80℃の温水に浸漬し、40℃で乾燥した。
(W2法)40℃で乾燥し、85℃の温水に浸漬し、70℃で乾燥した。
(W3法)30℃で乾燥し、80℃の温水に浸漬し、40℃で乾燥した。
(W4法)70℃で乾燥し、80℃の温水を噴霧し、70℃で乾燥した。
上記の処理を行った試験材について、以下に示す(A)〜(G)の各項目について性能評価を行った。(A)の高フイルム密着性については、実施例の剥離面積率は1%未満であり、フイルム密着性に優れていたが、比較例はいずれも剥離面積率1%以上で、高加工部のフイルム密着性に問題があった。(B)〜(G)の各項目については、実施例は比較例と同様に優れていた。
試験材の両面に厚さ20μmの延伸倍率3.1×3.1、厚さ25μm、共重合比12モル%、融点224℃のイソフタル酸共重合ポリエチレンテレフタラートフィルムを用い、フィルムの二軸配向度(BO値)が150になるようなラミネート条件、すなわち鋼板の送り速度:40m/min、ゴムロールのニップ長:17mm、圧着後水冷までの時間:1secでラミネートして、実施例、比較例の樹脂被覆鋼板を作製した。ここで、ニップ長とは、ゴムロールと鋼板が接する部分の搬送方向の長さのことである。得られた樹脂被覆鋼板を絞りしごき加工を行い、缶体を作製し、缶胴のネック部の加工(ネッキング加工)を行い、この缶体を120℃、30分間のレトルト処理を行い、缶胴のネック部の樹脂フィルムの剥離状況を観察し、剥離面積率から、5段階(◎:剥離面積率:0%、○:剥離面積率1%未満、△:剥離面積率1〜2%、△×:剥離面積率:2%超〜10%:、×:剥離面積率:10%超)で評価した。結果を表1に示す。
試験材の両面に厚さ20μmのPETフィルムを200℃でラミネートし、絞り加工としごき加工による製缶加工を段階的に行い、フィルムの疵、浮き、剥離を観察しそれらの面積率から成型を評価した結果、フィルムの疵、浮き、剥離がなかった。
(C)溶接性
ワイヤーシーム溶接機を用いて、溶接ワイヤースピード80m/minの条件で、電流を変更して試験材を溶接し、十分な溶接強度が得られる最小電流値とチリ及び溶接スパッタなどの溶接欠陥が目立ち始める最大電流値からなる適正電流範囲の広さから総合的に判断し、溶接性を評価した結果、二次側の適正電流範囲:1500A以上、であった。
(D)一次塗料密着性
試験材にエポキシ−フェノール樹脂を塗布し、200℃、30minで焼付けた後、1mm間隔で地鉄に達する深さの碁盤目を入れ、テープで剥離し、剥離状況を観察し、剥離面積率から、評価した結果、剥離面積率:0%であった。
(E)二次塗料密着性
試験材にエポキシ−フェノール樹脂を塗布し、200℃、30minで焼付けた後、1mm間隔で地鉄に達する深さの碁盤目を入れ、その後、125℃、30minのレトルト処理を行い、乾燥後、テープで塗膜を剥離し、剥離状況を観察し、剥離面積率から、4段階で評価した結果、剥離面積率:0%であった。
(F)塗膜下耐食性
試験材にエポキシ−フェノール樹脂を塗布し、200℃、30minで焼付けた後、地鉄に達する深さのクロスカットを入れ、1.5質量%クエン酸−1.5質量%食塩混合液からなる試験液に、45℃、72時間浸漬し、洗浄、乾燥後、テープ剥離を行い、クロスカット部の塗膜下腐食状況と平板部の腐食状況を観察し、塗膜下腐食の幅及び平板部の腐食面積率の両評価から、評価した結果、塗膜下腐食幅0.2mm未満かつ平板部の腐食面積率0%であった。
(G)レトルト耐錆性
試験材を125℃、30minのレトルト処理し、錆の発生状況を観察し、錆発生面積率から評価した結果、錆発生面積率0%、であった。
Claims (8)
- Zrイオン、Fイオンを含む溶液中で、鋼板を浸漬又は電解処理して形成される、付着量が、金属Zr量で0.1〜100mg/m2、F量で0.1mg/m2以下の化成皮膜と、該化成皮膜上に、付着量が、C量で0.05〜50mg/m2であるヒドロキシ酸処理層とを有する、容器用鋼板。
- 前記溶液中にさらにリン酸イオンを含み、前記化成皮膜の付着量が、さらにP量で0.1〜50mg/m2である請求項1に記載の容器用鋼板。
- 前記ヒドロキシ酸が、クエン酸、酒石酸、グリコール酸、乳酸、グリセリン酸およびマンデル酸から選択される少なくとも1つである請求項1または2に記載の容器用鋼板。
- 前記鋼板は、少なくとも片面に、Niを5〜1000mg/m2またはSnを100〜15000mg/m2を含む表面処理層を有する表面処理鋼板である、請求項1〜3のいずれか1項に記載の容器用鋼板。
- 前記鋼板は、Niを5〜150mg/m2含む、NiめっきまたはFe−Ni合金めっき相である下地Ni層と、前記下地Ni層の上に300〜3000mg/m2のSnめっきされ、溶融溶錫処理により前記下地Ni層の一部または全部と前記Snめっき層の一部が合金化され、Sn−Ni合金層もしくはFe−Sn−Ni合金層の単一層からなる中間層、最下層にNi層、その上面にSn−Ni合金層の複合層からなる中間層、又は最下層にFe−Ni層、その上面にFe−Sn−Ni合金層の複合層からなる中間層を有し、さらに前記中間層の上面に前記Snめっき層の合金化していない残部から形成された島状のSnめっき層とを有する表面処理鋼板である、請求項1〜4のいずれか1項に記載の容器用鋼板。
- 請求項1〜5のいずれか1項に記載の容器用鋼板の製造方法であって、
Zrイオン、Fイオンを含む溶液中で、鋼板を浸漬又は電解処理し、
鋼板上に付着量が、金属Zr量で0.1〜100mg/m2、F量で0.1mg/m2以下の化成皮膜を形成し、該化成皮膜を有する鋼板をヒドロキシ酸を含む水溶液中に浸漬する、または該化成皮膜上にヒドロキシ酸を含む水溶液を塗布し、乾燥する、請求項1〜5のいずれか1項に記載の容器用鋼板の製造方法。 - 前記乾燥工程の温度が、70℃以上である請求項6に記載の容器用鋼板の製造方法。
- 前記乾燥工程の後に、80℃以上の温度の水で洗浄し、さらに乾燥することを特徴とする、請求項6または7に記載の容器用鋼板の製造方法。
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