WO2019225765A1 - 表面処理鋼板 - Google Patents
表面処理鋼板 Download PDFInfo
- Publication number
- WO2019225765A1 WO2019225765A1 PCT/JP2019/020945 JP2019020945W WO2019225765A1 WO 2019225765 A1 WO2019225765 A1 WO 2019225765A1 JP 2019020945 W JP2019020945 W JP 2019020945W WO 2019225765 A1 WO2019225765 A1 WO 2019225765A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coating film
- plating layer
- alloy plating
- steel sheet
- based alloy
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 133
- 239000010959 steel Substances 0.000 title claims abstract description 133
- 238000000576 coating method Methods 0.000 claims abstract description 278
- 239000011248 coating agent Substances 0.000 claims abstract description 276
- 238000007747 plating Methods 0.000 claims abstract description 153
- 229920005989 resin Polymers 0.000 claims abstract description 29
- 239000011347 resin Substances 0.000 claims abstract description 29
- 239000011230 binding agent Substances 0.000 claims abstract description 23
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 155
- 239000011701 zinc Substances 0.000 claims description 140
- 229910045601 alloy Inorganic materials 0.000 claims description 132
- 239000000956 alloy Substances 0.000 claims description 132
- 239000000049 pigment Substances 0.000 claims description 99
- 239000003112 inhibitor Substances 0.000 claims description 97
- 239000003795 chemical substances by application Substances 0.000 claims description 58
- 230000003449 preventive effect Effects 0.000 claims description 52
- 229910052749 magnesium Inorganic materials 0.000 claims description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims description 18
- 229910052720 vanadium Inorganic materials 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 229910052703 rhodium Inorganic materials 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 239000013556 antirust agent Substances 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 142
- 239000003973 paint Substances 0.000 description 94
- 238000005260 corrosion Methods 0.000 description 93
- 230000007797 corrosion Effects 0.000 description 92
- 150000001875 compounds Chemical class 0.000 description 31
- 239000011777 magnesium Substances 0.000 description 31
- 229910052751 metal Inorganic materials 0.000 description 28
- 239000002184 metal Substances 0.000 description 28
- 230000002378 acidificating effect Effects 0.000 description 27
- 239000000523 sample Substances 0.000 description 27
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- 239000002904 solvent Substances 0.000 description 11
- 229910052725 zinc Inorganic materials 0.000 description 11
- 229910001335 Galvanized steel Inorganic materials 0.000 description 10
- 239000008397 galvanized steel Substances 0.000 description 10
- 238000012545 processing Methods 0.000 description 10
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000010960 cold rolled steel Substances 0.000 description 7
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- 238000002360 preparation method Methods 0.000 description 6
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- 239000010936 titanium Substances 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 4
- 229910018134 Al-Mg Inorganic materials 0.000 description 4
- 229910018467 Al—Mg Inorganic materials 0.000 description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- 230000008859 change Effects 0.000 description 4
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- 238000009826 distribution Methods 0.000 description 4
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 4
- 238000000921 elemental analysis Methods 0.000 description 4
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 3
- 229910000676 Si alloy Inorganic materials 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
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- 238000004458 analytical method Methods 0.000 description 3
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- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
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- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 2
- RGCKGOZRHPZPFP-UHFFFAOYSA-N Alizarin Natural products C1=CC=C2C(=O)C3=C(O)C(O)=CC=C3C(=O)C2=C1 RGCKGOZRHPZPFP-UHFFFAOYSA-N 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910021551 Vanadium(III) chloride Inorganic materials 0.000 description 2
- HFVAFDPGUJEFBQ-UHFFFAOYSA-M alizarin red S Chemical compound [Na+].O=C1C2=CC=CC=C2C(=O)C2=C1C=C(S([O-])(=O)=O)C(O)=C2O HFVAFDPGUJEFBQ-UHFFFAOYSA-M 0.000 description 2
- 239000002585 base Substances 0.000 description 2
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- 239000010951 brass Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 2
- ZXJXZNDDNMQXFV-UHFFFAOYSA-M crystal violet Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1[C+](C=1C=CC(=CC=1)N(C)C)C1=CC=C(N(C)C)C=C1 ZXJXZNDDNMQXFV-UHFFFAOYSA-M 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
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- 238000004090 dissolution Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- -1 hydrogen phosphate dihydrogen Ammonium salts Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
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- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 2
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- 150000003016 phosphoric acids Chemical class 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
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- HQYCOEXWFMFWLR-UHFFFAOYSA-K vanadium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[V+3] HQYCOEXWFMFWLR-UHFFFAOYSA-K 0.000 description 2
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- MFWFDRBPQDXFRC-LNTINUHCSA-N (z)-4-hydroxypent-3-en-2-one;vanadium Chemical compound [V].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O MFWFDRBPQDXFRC-LNTINUHCSA-N 0.000 description 1
- 229910018464 Al—Mg—Si Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 208000023514 Barrett esophagus Diseases 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 1
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910021542 Vanadium(IV) oxide Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 229910007565 Zn—Cu Inorganic materials 0.000 description 1
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 1
- QUEDYRXQWSDKKG-UHFFFAOYSA-M [O-2].[O-2].[V+5].[OH-] Chemical compound [O-2].[O-2].[V+5].[OH-] QUEDYRXQWSDKKG-UHFFFAOYSA-M 0.000 description 1
- YDHWWBZFRZWVHO-UHFFFAOYSA-N [hydroxy(phosphonooxy)phosphoryl] phosphono hydrogen phosphate Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(=O)OP(O)(O)=O YDHWWBZFRZWVHO-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical compound [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
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- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 description 1
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
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- 230000003628 erosive effect Effects 0.000 description 1
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- 238000005246 galvanizing Methods 0.000 description 1
- 125000001841 imino group Chemical group [H]N=* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- 230000009545 invasion Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical compound [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 description 1
- 239000011654 magnesium acetate Substances 0.000 description 1
- 235000011285 magnesium acetate Nutrition 0.000 description 1
- 229940069446 magnesium acetate Drugs 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- ALTWGIIQPLQAAM-UHFFFAOYSA-N metavanadate Chemical compound [O-][V](=O)=O ALTWGIIQPLQAAM-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
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- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229940068041 phytic acid Drugs 0.000 description 1
- 239000000467 phytic acid Substances 0.000 description 1
- 235000002949 phytic acid Nutrition 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229940005657 pyrophosphoric acid Drugs 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000013589 supplement 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
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 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
- 238000007740 vapor deposition Methods 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
- C23C28/3225—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only with at least one zinc-based layer
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- 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
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- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
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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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- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
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- 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
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- 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
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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
- 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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- C23C22/06—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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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
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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
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
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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
- 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
- C23C22/73—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 characterised by the process
- C23C22/74—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 characterised by the process for obtaining burned-in conversion coatings
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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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
Definitions
- the present invention relates to a surface-treated steel sheet having excellent corrosion resistance.
- a galvanized steel sheet in which a galvanized layer is formed on a steel sheet by hot dip galvanization or the like is known.
- the galvanized layer is provided on the steel plate, for example, even when the galvanized steel plate is damaged and the steel plate is exposed, zinc that is more likely to corrode than iron constituting the steel plate corrodes first to form a protective film, and The protective film can prevent corrosion of the steel sheet. Accordingly, galvanized steel sheets have been developed for various uses that require corrosion resistance.
- the surface of various plated steel sheets such as galvanized steel sheets may deteriorate depending on the surrounding environment.
- the plating layer is oxidized by an electrolyte such as salt contained in the atmosphere, oxygen and moisture present in a high-temperature and high-humidity environment, and white rust is generated. Since the generation of white rust may impair the appearance uniformity, higher corrosion resistance is required for the galvanized steel sheet.
- a Zn-based alloy-plated steel sheet subjected to Zn—Al—Mg-based alloy plating or the like is known.
- Patent Document 1 discloses a galvanized steel sheet having excellent corrosion resistance, which includes a steel sheet, a Zn—Al—Mg-based alloy plating layer formed on the surface of the steel sheet, and a film containing aluminum formed on the alloy plating layer. It is disclosed.
- patent document 2 it is a surface treatment metal plate which has at least one coating-film layer in a metal plate etc., and the coating-film layer formed in the outermost surface is an organic resin which has an anionic functional group, Li etc.
- a surface-treated metal plate characterized in that the cationic metal element is concentrated in a region close to the outer surface of the coating layer containing at least one cationic metal element selected from It is taught that such a surface-treated steel sheet can improve alkali resistance and solvent resistance without reducing corrosion resistance.
- Patent Document 3 discloses a ground treatment composition for a coated steel sheet containing a specific organosilicon compound, a hexafluorometal acid, a urethane resin having a specific cationic group, a vanadium compound, and an aqueous medium.
- a base treatment layer having corrosion resistance under the eaves can be formed on a steel plate.
- Patent Documents 4 to 6 disclose a coated steel sheet having a resin film containing, for example, a vanadium rust preventive pigment on a zinc-based plated steel sheet.
- Patent Document 1 a Zn—Al—Mg—Si alloy plating layer is provided on the steel sheet, and the corrosion resistance of the galvanized steel sheet is mainly secured by this alloy plating layer.
- Patent Document 1 teaches that a rust inhibitor can be further added to the film on the alloy plating layer.
- the concentration distribution of the rust inhibitor and the control method thereof are not always sufficient. It has not been examined. Therefore, the galvanized steel sheet described in Patent Document 1 still has room for improvement in terms of improving corrosion resistance.
- Patent Document 2 relates to a surface-treated metal plate having a coating mainly having improved alkali resistance and solvent resistance without reducing corrosion resistance. Further, sufficient investigation has not been made on the degree of concentration of the cationic metal element in the coating layer. Therefore, even in the surface-treated metal plate described in Patent Document 2, the improvement in corrosion resistance is still improved. There is room.
- a vanadium compound is used in order to improve the corrosion resistance.
- the concentration distribution of the vanadium compound in the base treatment layer obtained using this composition is not necessarily limited. Sufficient investigation has not been made, and there is still room for improvement in terms of improving corrosion resistance.
- the concentration distribution of the anticorrosive pigment such as a vanadium compound in the film has not necessarily been sufficiently studied, and there is still room for improvement in improving the corrosion resistance.
- an object of the present invention is to provide a surface-treated steel sheet excellent in corrosion resistance in a Zn-based alloy-plated steel sheet.
- the present inventors include a rust inhibitor in the coating film formed on the Zn-based alloy plating layer, and the Zn-based alloy plating layer and the coating film. It is important that the concentration of the anticorrosive agent in the coating film at a position 10 nm away from the interface is 1.5 times to 5.0 times the average concentration of the anticorrosive agent in the coating film. I found it. That is, according to the present invention, the rust preventive agent is concentrated and present in the region near the interface between the coating and the Zn-based alloy plating layer as compared with other regions.
- the concentration region of the rust inhibitor can serve as a barrier region for the underlying Zn-based alloy plating layer in the coating film. Moreover, such a barrier area
- the present invention has been made on the basis of the above findings, and the gist thereof is as follows.
- the chemical composition of the Zn-based alloy plating layer is mass%, Al: 0.01 to 60%, Mg: 0.001 to 10%, and Si: 0 to 2%,
- the concentration of the rust inhibitor in the coating film at a position 10 nm away from the interface between the Zn alloy plating layer and the coating film is 1.5 to 5 of the average concentration of the rust inhibitor in the coating film.
- a rust inhibitor is contained in the coating film formed on the Zn-based alloy plating layer, and the rust preventive agent is located at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film. Is 1.5 times or more and 5.0 times or less the average concentration of the rust inhibitor in the coating film. That is, in the coating film, the rust preventive agent is concentrated and present in a region near the interface between the coating film and the Zn-based alloy plating layer as compared with other portions.
- the concentration region of the rust preventive agent serves as a barrier region for the Zn-based alloy plating layer against a corrosion factor such as oxygen, and as a result, a surface-treated steel sheet having excellent corrosion resistance can be provided. Moreover, according to the present invention, excellent corrosion resistance can be maintained even when the surface-treated steel sheet according to the present invention is processed.
- a bright pigment may be contained in the coating film on the Zn-based alloy plating layer.
- the brightness of the surface-treated steel sheet according to the present invention is improved by the metallic appearance of the bright pigment, and a surface-treated steel sheet having excellent design properties can be provided.
- a bright pigment is included in the coating film, for example, even if the Zn-based alloy plating layer turns black due to zinc oxidation of the Zn-based alloy plating layer (hereinafter referred to as blackening), it is included in the coating film.
- the bright pigment can make the blackening invisible, that is, it can suppress the change in the appearance of the coating film and provide a surface-treated steel sheet excellent in design.
- the oxide film on the surface of the Zn-based alloy plating layer is appropriately removed, and the Zn-based alloy plating is performed.
- the coating material by setting the coating material to the above pH, it is possible to produce a coating material in which the rust preventive agent is stably dissolved, and it has excellent storage stability compared to an alkaline coating material. Is possible.
- the surface-treated steel sheet of the present invention has a coating film containing a rust inhibitor and a binder resin formed on a steel sheet, a Zn-based alloy plating layer formed on at least one surface of the steel sheet, and a Zn-based alloy plating layer,
- the chemical composition of the Zn-based alloy plating layer is Al: 0.01 to 60%, Mg: 0.001 to 10%, and Si: 0 to 2% by mass%.
- the concentration of the rust inhibitor in the coating film at a position 10 nm away from the interface with the film is 1.5 to 5.0 times the average concentration of the rust inhibitor in the coating film.
- ⁇ Steel plate> It does not specifically limit as a steel plate (plating original plate) in this invention, General steel plates, such as a hot-rolled steel plate and a cold-rolled steel plate, can be used.
- the steel type is not particularly limited, and for example, Al-killed steel, ultra-low carbon steel containing Ti, Nb, etc., and high-tensile steel containing elements such as P, Si, Mn, etc. can be used. is there.
- the thickness of the steel plate in the present invention is not particularly limited, but may be, for example, 0.25 to 3.5 mm.
- the Zn-based alloy plating layer in the present invention is formed on a steel plate. This Zn-based alloy plating layer may be formed on one side of the steel plate or on both sides.
- the Zn-based alloy plating layer may be a Zn—Al—Mg alloy plating layer containing at least Al and Mg, and may further be a Zn—Al—Mg—Si alloy plating layer containing Si. Each content (concentration) of these is, in mass%, Al: 0.01 to 60%, Mg: 0.001 to 10%, Si: 0 to 2%, and the balance is Zn and impurities.
- % when the chemical composition of the Zn-based alloy plating layer is simply described as “%”, it means “mass%”.
- the Al content of the Zn-based alloy plating layer is less than 0.01%, the effect of improving the corrosion resistance of the plated steel sheet due to the inclusion of Al is not sufficiently exhibited, and when it exceeds 60%, the effect of improving the corrosion resistance is saturated. Therefore, the Al content may be 0.01% or more, such as 0.1% or more, 0.5% or more, 1% or more, 3% or more, or 5% or more, and 60% or less, for example, 55% or less, 50% or less, 40% or less, or 30% or less.
- a preferable Al content is 1 to 60%, more preferably 5 to 60%.
- the Mg content of the Zn-based alloy plating layer is less than 0.001%, the effect of improving the corrosion resistance of the plated steel sheet due to the inclusion of Mg may not be sufficiently exhibited.
- Mg cannot be completely dissolved in the plating bath and floats as an oxide (generally called dross).
- dross oxide
- the oxide adheres to the plating surface layer and causes an appearance defect. There is a risk that a portion that is not plated (generally referred to as non-plating) may occur.
- the Mg content may be 0.001% or more, for example, 0.01% or more, 0.1% or more, 0.5% or more, 1% or more, or 2% or more, and 10% or less. For example, it may be 8% or less, 6% or less, 5% or less, or 4% or less.
- the Mg content is preferably 1 to 5%, more preferably 1 to 4%.
- the lower limit of the Si content of the Zn-based alloy plating layer may be 0%, but in order to further improve the corrosion resistance of the Zn-based alloy plating layer, it may be 0.001% to 2%.
- the Si content may be, for example, 0.005% or more, 0.01% or more, 0.05% or more, 0.1% or more, or 0.5% or more, and 1.8% or less, It may be 1.5% or less or 1.2% or less.
- the Si content is preferably 0.1 to 2%, more preferably 0.5 to 1.5%.
- the Zn-based alloy plating layer in the present invention can be formed by a known plating method such as hot dipping or vapor deposition plating.
- the thickness of the Zn-based alloy plating layer may be 1 to 30 ⁇ m.
- the coating film in the present invention is formed on the Zn-based alloy plating layer.
- the coating film contains a rust inhibitor and a binder resin.
- a bright pigment in order to improve the brightness of the surface-treated steel sheet, it is preferable to further include a bright pigment in the coating film.
- the rust inhibitor is present as a fine compound (for example, P compound or V compound).
- the coating material for forming the coating film in the present invention it is effective to use an acidic coating material having a pH of 3.0 to 5.0, for example.
- the rust inhibitor is dispersed microscopically in the coating film, the normal analysis method clearly identifies the fine rust inhibitor and the binder resin that forms the coating film in the coating film. In the coating film, it is observed that the rust inhibitor and the binder resin are distributed in the same region.
- “containing a rust preventive agent” in the coating film includes an element exhibiting a rust prevention function constituting the fine compound, for example, elements of P, V, and Mg in the coating film.
- the “concentration” of the rust inhibitor described later means, for example, the sum of the concentrations (contents) of the elements P, V, and Mg, and the unit is mass%.
- the paint for forming the coating film in the present invention acidic, for example, pH 3.0 to 5.0, it becomes possible for the components of the rust preventive agent to exist in a dissolved state in the paint. . That is, the component of the rust inhibitor according to the present invention is not included in the paint as a compound state (ie, a solid component), but is included in the paint as an ionic state (ie, a dissolved component). Therefore, when such a coating is applied to the surface of the Zn-based alloy plating layer and cured, the rust inhibitor can be present as a substantially uniform fine compound in the formed coating film.
- the component of the rust inhibitor according to the present invention is not included in the paint as a compound state (ie, a solid component), but is included in the paint as an ionic state (ie, a dissolved component). Therefore, when such a coating is applied to the surface of the Zn-based alloy plating layer and cured, the rust inhibitor can be present as a substantially uniform fine compound in the formed
- the acidic paint when an acidic paint having a pH of 3.0 to 5.0 is applied to the surface of the Zn-based alloy plating layer, the acidic paint removes an oxide film on the surface of the Zn-based alloy plating layer, and the Zn-based alloy plating layer The component of the rust preventive agent in an ionic state reacts with the component in the Zn-based alloy plating layer in the vicinity of the surface. As a result, after the coating is cured, a region where the reaction product is concentrated can be formed in the vicinity of the interface between the Zn-based alloy plating layer and the coating film.
- the reaction product formed as described above as well as a fine compound present substantially uniformly in the coating film as a rust inhibitor the reaction product formed as described above as well as a fine compound present substantially uniformly in the coating film as a rust inhibitor. Therefore, the rust preventive agent (for example, P, V, Mg) is concentrated compared to other regions, and as a result, this concentrated region serves as a barrier region that prevents the invasion of corrosion factors in the coating film.
- the surface-treated steel sheet according to the present invention manufactured using an acidic paint having a pH of 3.0 to 5.0 has a concentrated area of the rust inhibitor near the interface between the Zn-based alloy plating layer and the coating film. In addition, extremely high corrosion resistance can be provided.
- the average thickness of the coating film is not particularly limited, but can be, for example, 3 to 15 ⁇ m.
- the coating film serves as a barrier that sufficiently suppresses corrosion of the underlying Zn-based alloy plating layer, and is sufficient for the surface-treated steel sheet according to the present invention. Corrosion resistance can be provided.
- the average thickness of the coating film is in the above range, even if the surface-treated steel sheet according to the present invention having such a coating film is processed, the coating film does not crack and is excellent in workability.
- a coated film can be provided.
- the average thickness of the coating film is less than 3 ⁇ m, the thickness may be insufficient to sufficiently suppress the progress of corrosion of the underlying Zn-based alloy plating layer, and thus the surface treatment according to the present invention.
- the corrosion resistance of the steel sheet may be insufficient.
- the average thickness of the coating film exceeds 15 ⁇ m, the effect of increasing the corrosion resistance by increasing the thickness of the coating film is reduced, and it takes time for curing, which may be disadvantageous in terms of cost. is there.
- the average thickness of the coating film may be, for example, 3 ⁇ m or more, 4 ⁇ m or more, or 5 ⁇ m or more, and may be 12 ⁇ m or less or 10 ⁇ m or less. Therefore, the average thickness of the coating film is preferably 3 ⁇ m or more and 12 ⁇ m or less, and more preferably 5 ⁇ m or more and 10 ⁇ m or less.
- the “average thickness” of the coating film according to the present invention can be determined by any method known to those skilled in the art. For example, the cross section of a steel sheet having a coating film is observed, and the shortest distance from the arbitrary position on the interface between the Zn-based alloy plating layer and the coating film to the surface of each coating film is measured (ie, It can be determined by measuring the distance in the direction perpendicular to the interface) and averaging those measurements.
- the binder resin used as a component of the coating film of this invention is a resin which can be used in an acidic solvent,
- the curing agent for the binder resin is not particularly limited as long as it can be used in an acidic solvent and can cure the binder resin.
- a melamine resin, an isocyanate resin, or an epoxy resin can be used.
- the binder resin in the present invention is a polyester resin
- the curing agent is a melamine resin.
- the polyester resin preferably has a glass transition temperature Tg of ⁇ 20 to 70 ° C.
- the binder resin is a urethane resin, it is preferable that Tg is 0 to 50 ° C. and the number average molecular weight is 5000 to 25000.
- the binder resin is an acrylic resin, it is preferable that Tg is 0 to 50 ° C. and the number average molecular weight is 3000 to 25000.
- a rust inhibitor typically P and / or V
- the rust preventive agent in the present invention exists as a substantially uniform and fine compound in the coating film, but in the present invention, the “rust preventive agent” is a rust preventive constituting the rust preventive agent. It means an element that exhibits a function, for example, P element, V element, and Mg element. Since the rust inhibitor present as a fine compound in the coating film is soluble in water, the rust inhibitor in the coating film dissolves in water when the coating film is exposed to, for example, a wet environment.
- the rust preventive component is eluted, and a rust preventive function that suppresses corrosion of the Zn-based alloy plating layer can be exhibited.
- the reaction between the rust inhibitor component eg, P, V, etc.
- the region where the reaction product exists acts as a barrier region for the corrosion factor. Therefore, in the surface-treated steel sheet according to the present invention, the rust inhibitor is present as a fine compound in the coating film, and has a concentrated area of the rust inhibitor in the interface region between the Zn-based alloy plating layer and the coating film. Therefore, it has excellent corrosion resistance.
- any compound that can be dissolved in an acidic paint can be used.
- a rust inhibitor dissolved in such an acidic paint is sometimes called a cation inhibitor.
- antirust agent source in the present invention examples include a P (phosphorus) compound, a V (vanadium) compound, and an Mg (magnesium) compound.
- P and V are contained alone or in combination in the coating film of the present invention. More preferably, the coating film contains P alone or a combination of P and V.
- Processed part corrosion resistance means the corrosion resistance in the process part at the time of processing (for example, bending process) to the steel plate which has a coating film.
- the reason why the corrosion resistance of the processed part is improved by including P in the coating film as described above is that P reacts with the surface of the Zn-based alloy plating layer to form a phosphate layer to passivate the processed part. Effect, P itself forms a poorly soluble coating and exhibits barrier properties against corrosion factors, and P supplements metal ions eluted from the underlying metal plate to form a poorly soluble compound together with metal ions, This is considered to be due to the effect of exerting the properties.
- a rust preventive agent source containing P in this invention For example, phosphoric acids, such as orthophosphoric acid, metaphosphoric acid, pyrophosphoric acid, triphosphoric acid, and tetraphosphoric acid, triammonium phosphate, hydrogen phosphate dihydrogen Ammonium salts such as ammonium, metal salts with Na, Mg, Al, K, Ca, Mn, Ni, Zn, Fe, aminotri (methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetra (Methylenephosphonic acid), phosphonic acids such as diethylenetriaminepenta (methylenephosphonic acid) and their salts, organic phosphoric acids such as phytic acid and their salts, and the like.
- rust inhibitor sources can be added singly or in combination to the coating material for forming the coating film in the present invention.
- end surface portion corrosion resistance means, for example, corrosion resistance at the end surface portion when processing (for example, cutting processing) is performed on a steel sheet having a coating film.
- the reason why the end face portion corrosion resistance is improved by including V in the coating film in this way is that corrosion occurs by reacting V eluted from the coating film with Zn or Al eluted from the Zn-based alloy plating layer at the end face portion. This is because the progress of the corrosion can be suppressed by forming an object and passivating the surface layer of the Zn-based alloy plating layer.
- These rust inhibitor sources can be added singly or in combination to the coating material for forming a coating film in the present invention.
- Examples of the rust preventive source containing Mg in the present invention include magnesium nitrate Mg (NO 3 ) 2 , magnesium sulfate MgSO 4 , magnesium acetate Mg (CH 3 COO) 2 and the like. These rust inhibitor sources can be added singly or in combination to the coating material for forming the coating film in the present invention.
- Mg can improve the end face portion corrosion resistance like V described above. The reason why the end face portion corrosion resistance is improved is also considered to be the same as V.
- the average concentration of the rust inhibitor in the coating film can be 3 to 15% by mass.
- concentration of a rust preventive agent is based on the sum total of the density
- the concentration of the rust preventive agent is not insufficient in other regions, that is, the entire coating film, that is, the present invention. In the surface-treated steel sheet according to the present invention, sufficient corrosion resistance can be provided.
- the average concentration of the anticorrosive agent in the coating film may be 5% or more, 7% or more, or 10% or more in mass%, and therefore preferably 5% or more and 15% or less, more preferably 7%. It is 15% or less, more preferably 10% or more and 15% or less.
- “average concentration of rust inhibitor in coating film” is determined by the following method. First, the cross section of the steel sheet with the coating film is observed with a TEM, and the Zn-based alloy plating layer is directed in a direction (thickness direction) perpendicular to the coating film surface from a randomly selected position on the coating film surface. And draw a straight line. Next, the thickness of the coating film is divided into 11 equal parts on the straight line and divided into 11 regions. Then, the concentration of the anticorrosive agent, that is, for example, the total concentration of elements of P, V, and Mg is measured in 10 regions in the coating film excluding the region closest to the Zn-based alloy plating layer among the regions. Then, it is determined by averaging those measured values. The concentration of the rust inhibitor at each position can be determined by elemental analysis using an energy dispersive X-ray spectrometer (EDS) attached to the SEM or TEM.
- EDS energy dispersive X-ray spectrometer
- the concentration of the rust inhibitor in the coating film at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film is 1.5 times or more the average concentration of the rust inhibitor in the coating film. 0.0 or less. That is, the rust inhibitor is concentrated in a region in the coating film and in the vicinity of the interface between the coating film and the Zn-based alloy plating layer. In this way, when the rust inhibitor is concentrated in the region near the interface between the coating film and the Zn-based alloy plating layer as compared with other portions, the concentrated region of the rust inhibitor is Zn against corrosion factors such as oxygen. It becomes possible to act as a barrier region for the system alloy plating layer.
- the concentration region of the rust preventive agent as described above can sufficiently maintain the corrosion resistance even after the surface-treated steel sheet is processed.
- this value is less than 1.5 times, the corrosion factor passes through the coating film and near the interface between the coating film and the Zn-based alloy plating layer side to corrode the Zn-based alloy plating layer.
- the effect as a barrier region to be suppressed is weakened, the corrosion factor may reach the Zn-based alloy plating layer, and the coating film may not provide sufficient corrosion resistance.
- this value is more than 5.0 times, the degree of concentration in the concentration region of the rust inhibitor is too high. May cause cohesive failure. If it does so, process adhesiveness will fall, As a result, corrosion resistance in a process part cannot be maintained and there exists a possibility that corrosion resistance may become inadequate.
- the concentration of the rust inhibitor in the coating film at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film is 1.7 times or more and 2.0 times or more of the average concentration of the rust inhibitor in the coating film. , Or 2.2 times or more, and 4.8 times or less, 4.5 times or less, 4.2 times or less, 4.0 times or less, or 3.5 times or less, preferably It is 2.0 times or more and 4.5 times or less, more preferably 2.0 times or more and 4.0 times or less, and further preferably 2.5 times or more and 4.0 times or less.
- the concentration of the rust inhibitor in the coating film at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film is determined from the cross section of the steel sheet having the coating film using TEM-EDS. Specifically, from the TEM image of the observed cross section, five positions 10 nm away from the interface between the randomly selected Zn-based alloy plating layer and the coating film in the direction perpendicular to the coating surface. In TEM-EDS, the concentration of the anticorrosive agent (that is, the total concentration of elements such as P, V, and Mg) is measured, and the measured values are averaged.
- the concentration of the anticorrosive agent that is, the total concentration of elements such as P, V, and Mg
- the component (for example, P) of the rust inhibitor contained in the paint film of the present invention since the acidic paint having a pH of 3.0 to 5.0 removes the oxide film on the surface of the Zn-based alloy plating layer, the component (for example, P) of the rust inhibitor contained in the paint film of the present invention. And a component (for example, Zn) contained in the Zn-based alloy plating layer reacts near the interface between the coating film and the Zn-based alloy plating layer, and a reaction product (for example, Zn and P) is reacted in the region near the interface. Containing reaction product). In the region where this reaction product exists, both the rust inhibitor component uniformly dispersed in the coating film and the rust inhibitor component constituting the reaction product exist in the same manner as other regions. doing. Therefore, in the surface-treated steel sheet according to the present invention, the rust preventive agent (for example, P) is concentrated in the coating film and in the vicinity of the interface between the coating film and the Zn-based alloy plating layer as
- the region where such a reaction product exists can be measured using an elemental analysis method known to those skilled in the art.
- P when P is included as a rust preventive agent, when elemental analysis is performed in the direction perpendicular to the surface of the coating film from the surface of the coating film to the Zn-based alloy plating layer, that is, in the thickness direction,
- region where P as a component of a rust preventive agent concentrates in the interface vicinity of a coating film and Zn type alloy plating layer can be measured.
- a bright pigment in the surface-treated steel sheet according to the present invention, it is preferable that a bright pigment is included in the coating film in order to improve the designability in addition to the above-described rust inhibitor.
- “bright pigment” means a pigment that reflects light on its surface. The bright pigment is not dissolved in the acidic paint for preparing the coating film, but is used in the coating film as it is added to the paint. Therefore, in the present invention, “containing a bright pigment” in the coating means that the coating includes a simple metal, an oxide, an alloy, or the like described below. And the binder resin forming the coating film can be clearly distinguished and specified. Therefore, the “concentration” of the luster pigment to be described later means the total concentration as a simple metal, oxide or alloy described below.
- the reason for improving the designability is that products using Zn-based alloy-plated steel sheets for building materials and outdoor home appliances are generally used in places where they can be seen by users. This is because the alloy-plated steel sheet preferably has good visual quality (appearance). In particular, in the case where the bright pigment is a design close to a Zn-based alloy plating layer, unevenness of the coating thickness is difficult to be noticed or wrinkles are not noticeable. Therefore, the coating thickness can be reduced, which is economically preferable.
- the brightness of the surface-treated steel sheet can be improved due to its metallic appearance (for example, silver color), and the surface has high appearance and excellent appearance. It becomes possible to provide a treated steel plate. Furthermore, when the bright pigment has the same or similar color tone as that of the Zn-based alloy plating layer, it is possible to make the appearance change due to scratches less noticeable when the coating film is damaged, thus improving the scratch resistance. And the excellent appearance of the surface-treated steel sheet according to the present invention can be maintained over a long period of time.
- the underlying Zn-based alloy plating layer is made invisible by the bright pigment when the bright pigment is contained in the coating film. be able to.
- Zn contained in the Zn-based alloy plating layer is oxidized by the influence of oxygen in the air, etc., to form a Zn oxide deficient in oxygen, and the Zn-based alloy plating layer turns black Even so, the blackening can be made invisible by the bright pigment, and the designability of the surface-treated steel sheet according to the present invention can be maintained.
- the bright pigment in the present invention is not particularly limited as long as it can be used in an acidic paint having a pH of 3.0 to 5.0 used in the present invention, that is, it does not dissolve in this pH range.
- the oxide include, but are not limited to, alumina, silica, mica, zirconia, titania, glass, zinc oxide, and the like. These pigments are coated with a metal oxide such as silica and have a metallic appearance (also referred to as a metallic appearance). These can be used alone or in combination in the coating film.
- a metal capable of providing high luminance can be further added to the coating film.
- metals are metals having high luminance and are not particularly limited as long as they can be used in acidic paints.
- Rh (rhodium), Cr (chromium), Ti (titanium) examples thereof include simple metals such as Ag (silver) and Cu (copper), and alloys such as Zn—Cu (brass). These metals can be used alone or in combination in the coating film.
- the average particle diameter of the bright pigment in the present invention is not particularly limited, but can be, for example, in the range of 1 ⁇ m to 30 ⁇ m.
- the average particle diameter of the bright pigment is in the range of 1 ⁇ m or more and 30 ⁇ m or less, it is possible to provide sufficient designability while maintaining corrosion resistance without causing uneven brightness.
- the average particle diameter of the bright pigment is less than 1 ⁇ m, it becomes difficult to uniformly disperse in the paint for forming the coating film in the present invention, and unevenness occurs in the color tone of the formed coating film. Sexuality may not be guaranteed.
- the average particle diameter of the bright pigment is more than 30 ⁇ m, the bright pigment protrudes from the surface of the coating film, and a corrosive factor may enter from the protruded portion, which may deteriorate the corrosion resistance. Furthermore, when such a protruding portion exists, it is difficult to have a uniform appearance, and the designability may be insufficient.
- the average particle size of the bright pigment may be 2 ⁇ m or more or 3 ⁇ m or more, and may be 25 ⁇ m or more, 20 ⁇ m or less, or 15 ⁇ m or less, preferably 3 ⁇ m or more and 25 ⁇ m or less, more preferably 3 ⁇ m or more and 20 ⁇ m or less, Preferably they are 3 micrometers or more and 15 micrometers or less.
- the “average particle size” for the bright pigment according to the present invention can be determined by the following method as an example.
- a mapping image of elements constituting the bright pigment is obtained from a direction perpendicular to the surface of the coating film by a field emission electron probe microanalyzer (FE-EPMA).
- the area of the measurement range of the mapping image is 20 mm ⁇ 20 mm or more.
- the outline of the bright pigment existing in the measurement range is specified from the obtained mapping image, and the total area S surrounded by the outline is obtained. Further, the number N of bright pigments present within the measurement range is obtained.
- the obtained area S is composed of N bright pigments whose cross section is a circle having a diameter (particle diameter) D
- the shape of the bright pigment in the present invention may be any shape, and may be, for example, spherical, elliptical, needle-like, flat, thin-plate, or scale-like.
- the shape of the luster pigment can be scaly. If the shape of the bright pigment in the present invention is scaly, the bright pigment can effectively make the underlying Zn-based alloy plating layer invisible, that is, the product effectively due to blackening of the Zn-based alloy plating layer. It is possible to provide a surface-treated steel sheet that can suppress changes in appearance and is extremely excellent in design.
- the average concentration of the bright pigment in the coating film can be, for example, 5% to 15% in mass%. By being the average concentration of the bright pigment in the coating film in such a range, it becomes possible to provide a uniform metallic appearance to the surface-treated steel sheet according to the present invention without impairing the workability of the coating film, A surface-treated steel sheet excellent in design can be provided. If the average concentration of the bright pigment in the coating film is less than 5%, the bright pigment in the coating film is insufficient, it is not possible to provide a sufficient metallic appearance, the brightness is insufficient, and sufficient design properties can be provided. It may disappear.
- the average concentration of the bright pigment in the coating film exceeds 15%, the improvement in luminance due to the addition of the bright pigment is saturated, which is not preferable in terms of cost.
- the presence of many bright pigments in the coating film relatively reduces the ratio of the binder resin that constitutes the coating film, and there is a risk that the workability may deteriorate, such as cracks in the coating film when processed.
- the average concentration of the bright pigment in the coating film is 5% or more and 12% or less, more preferably 6% or more and 10% or less.
- average concentration of bright pigment in coating film can be determined by a known method. For example, it can be measured using a glow discharge luminescence surface analyzer (Glow Discharge Optical Emission Spectrometry: GD-OES). Specifically, when the type of the luster pigment, that is, the specific compound of the luster pigment is known, the coating film is first sputtered from the surface toward the Zn-based alloy plating layer, and the main pigment constituting the luster pigment is formed. For the element, the concentration profile in the depth direction is measured every 1.0 ⁇ m.
- the average value of the measured concentration of the main element is obtained, the measured concentration is converted based on the molecular weight of the known colored pigment compound, and the average concentration of the bright pigment in the coating film is obtained.
- a coating film is peeled mechanically or chemically, and the whole mass of a coating film is measured. Thereafter, the concentration of the bright pigment contained in the peeled coating film is measured by analysis.
- ICP Inductively Coupled Plasma
- fluorescent X-ray analysis can be used as a method for analyzing the concentration of the bright pigment in the peeled coating film.
- the elements constituting the bright pigment are analyzed by FE-EPMA on the cross section of the coating film (surface perpendicular to the coating film surface).
- the “average concentration of the luster pigment in the coating film” can be measured as described above.
- the bright pigment is brass, which is an alloy
- the total content (concentration) of Cu and Zn is defined as the average concentration of the bright pigment in the coating film.
- pigments and aggregates other than the rust inhibitor and the luster pigment according to the present invention can be added as necessary.
- wax such as polyethylene wax or PTFE wax
- resin beads such as acrylic resin beads or urethane resin beads
- dyes such as phthalocyanine blue, phthalocyanine green, methyl orange, methyl violet, or alizarin in the coating film.
- the strength of the coating film can be increased, or a desired color can be imparted to the coating film, which is more preferable. What is necessary is just to determine these addition amounts suitably so that it may not become disadvantageous for the coating film in this invention.
- a dye can be used as a colorant in order to impart a desired color to the coating film according to the present invention, and thus to the surface-treated steel sheet according to the present invention.
- the dyes may be used alone or in combination of a plurality of dyes.
- a dye may be used in combination with a color pigment.
- a well-known dye can be used, For example, phthalocyanine blue, phthalocyanine green, methyl orange, methyl violet, or alizarin is used. be able to.
- a method for producing the surface-treated steel sheet according to the present invention will be described below.
- an acidic paint having a pH of 3.0 to 5.0 containing at least a rust inhibitor and a binder resin is applied onto a Zn-based alloy plating layer formed on the steel sheet, It can be manufactured by heating to cure the paint.
- a steel plate what has arbitrary board thickness and chemical composition can be used.
- a cold rolled steel sheet having a thickness of 0.25 to 3.5 mm can be used.
- the Zn-based alloy plating layer can be formed to a thickness of 5 to 30 ⁇ m using, for example, a Zn—Al—Mg hot dipping bath or a Zn—Al—Mg—Si hot dipping bath at 400 to 550 ° C. .
- the paint can be obtained, for example, by mixing a binder resin dispersed in a solvent and a curing agent, and then dispersing a predetermined amount of a rust preventive agent and optionally a bright pigment in the mixture. Can do.
- the order of mixing may be different.
- binder resin A polyester resin, a urethane resin, or an acrylic resin can be used, A melamine resin etc. can be used as a hardening
- an acidic thing can be used as a solvent, and what melt
- the bright pigment can be appropriately selected from pigments that do not dissolve in an acidic solvent.
- the ratio between the binder resin and the curing agent can be determined as appropriate, and can be, for example, in the range of 1: 1 to 9: 1.
- the pH of the paint used for obtaining the coating film in the present invention is 3.0 or more and 5.0 or less.
- the component of the rust preventive agent in the ionic state reacts with the component in the Zn-based alloy plating layer, and as a result, after hardening the paint, the Zn-based alloy plating layer A region where the reaction product is concentrated can be formed in the vicinity of the interface between the film and the coating film.
- the pH of the paint is less than 3.0, the degree of concentration in the concentration region of the rust inhibitor becomes too high, and when the surface-treated steel sheet is processed, the coating film coheses and breaks in the concentration region of the rust inhibitor. There is a case.
- the pH of the paint may be 3.2 or more or 3.5 or more, and may be 4.8 or less or 4.5 or less.
- the pH of the paint is preferably 3.2 to 4.8, more preferably 3.5 to 4.5.
- pH cannot be measured after a coating material is hardened and it becomes a coating film.
- the pH of the paint may vary depending on the production lot such as the solvent of the raw material. For this reason, it is necessary to adjust pH using an acid or alkaline aqueous solution. More specifically, the pH after preparation of the paint is measured, and depending on the target pH, nitric acid, hydrochloric acid or sulfuric acid may be used to lower the pH value, and sodium hydroxide aqueous solution to increase the pH value. Etc. can be used. These acid or alkali aqueous solutions are preferably diluted before use for pH adjustment.
- the obtained paint is applied on the Zn-based alloy plating layer so that the coating film has a predetermined thickness, and is baked and cured.
- the coating method of the paint is not particularly limited, and can be performed by any coating method known to those skilled in the art. For example, it may be performed by a roll coater. Baking can be performed under any heating condition that cures the paint. For example, heating is performed so that the steel sheet temperature is 180 to 230 ° C. at a heating rate of 5 to 70 ° C./second.
- a rust inhibitor containing P, V, or Mg is present as a fine compound in the coating film.
- a rust inhibitor source for example, a P compound, V compound or Mg compound
- a coating material for forming a coating film in the present invention is dissolved to prepare a coating material for forming a coating film in the present invention.
- the coating film is used to uniformly distribute the antirust pigment in the formed coating film. It is thought that it is necessary to uniformly disperse the rust preventive pigment in the paint for forming the.
- the coating film is used to uniformly distribute the antirust pigment in the formed coating film. It is thought that it is necessary to uniformly disperse the rust preventive pigment in the paint for forming the.
- the resin as the main component of the formed coating film The ratio may be reduced and the coating film may become brittle, and it is considered that there is an upper limit to the amount of the anticorrosive pigment added to the coating film.
- such a paint has a dispersion state that deteriorates while the paint is stored until it is used after the paint is prepared by dispersing the antirust pigment, and as a result, the paint in which the antirust pigment is uniformly distributed is obtained.
- problems such as inability to obtain a film.
- an alkaline paint for a coating film is prepared using a compound that dissolves in an alkaline solvent as a rust inhibitor source, the amount of the compound added is increased. And the rust preventive agent source may not be sufficiently dissolved, and solid matter may be generated in the paint. In addition, the paint may harden (gelate) during storage of the paint, and there is a problem of the storage stability of the paint when storing the paint. Further, it is considered that the oxide film on the Zn-based alloy plating layer cannot be sufficiently removed even when an alkaline paint is applied on the Zn-based alloy plating layer.
- an acidic paint and a compound that dissolves in the paint as an antirust agent source are used, and the compound is dissolved in the acidic paint. Therefore, there is no restriction on the uniform dispersion of the rust preventive component in the paint as in the case of using a powdered rust preventive pigment. Therefore, in such a manufacturing method, many rust preventives can be added in a coating material in the state which distributed the rust preventive agent uniformly compared with the coating material containing rust preventive pigments, such as a powder.
- the acidic paint having a pH of 3.0 to 5.0 for forming the coating film in the present invention is less likely to harden than the alkaline paint even when a large amount of the anticorrosive agent is added to the paint. Is excellent in storage stability.
- the coating material for forming a coating film in the present invention can be added with many sources of rust preventives while having the storage stability of the coating material. It becomes possible to form a coating film containing a rust inhibitor. Therefore, by forming a coating film using such a paint, it becomes possible to form a surface-treated steel sheet having extremely excellent corrosion resistance.
- the active metal under the oxide film of the Zn-based alloy plating layer is exposed, and the active metal reacts with the component of the rust inhibitor in the coating film, thereby forming the reaction product.
- the rust preventive agent is concentrated as compared with other regions. Therefore, this concentrated region acts as a barrier region for preventing corrosion factors from entering the Zn-based alloy plating layer, so that the surface-treated steel sheet according to the present invention can have extremely high corrosion resistance.
- the concentration of the rust inhibitor in the coating film at a position 10 nm away from the surface-treated steel sheet according to the present invention, that is, the interface between the Zn-based alloy plating layer and the coating film is 1 of the average concentration of the rust inhibitor in the coating film.
- the surface-treated steel sheet of 5 times or more and 5.0 times or less uses an acidic paint having a pH of 3.0 to 5.0, and various parameters at the time of manufacture, for example, the type of rust preventive in the paint, Produced by appropriately adjusting the amount of rust inhibitor added, the temperature of the paint, the heating temperature and heating time when curing the paint, the ratio of the binder resin to the curing agent, the pretreatment of the alloy plating layer, etc. Can do.
- an acidic paint having a pH of 3.0 to 5.0 containing a predetermined amount of a rust inhibitor component and optionally a bright pigment is used, and by appropriately adjusting such parameters, the anti-corrosion in the coating film is prevented. It is possible to adjust the degree of concentration of the rusting agent, and thus it is possible to manufacture the surface-treated steel sheet according to the present invention.
- the oxide film of the Zn-based alloy plating layer is removed, and the active metal of the Zn-based alloy plating layer reacts with the components in the paint, so that a strong chemical is formed between the Zn-based alloy plating layer and the coating film. Therefore, it is possible to obtain a surface-treated steel sheet having excellent adhesion between the Zn-based alloy plating layer and the coating film. More specifically, although not bound by a specific theory, the components of the rust inhibitor in the paint react to form a hydroxide, and the functional group of the hydroxide reacts with the resin to become irreversible. As a result, the adhesion is improved between the Zn-based alloy plating layer and the coating film.
- Such adhesion cannot be achieved, for example, when a neutral or alkaline paint is used to form a coating film. Therefore, an acidic paint having a pH of 3.0 to 5.0 is used to form a coating film. In this case, the adhesion is improved as compared with the case where a neutral or alkaline paint is used.
- the surface-treated steel sheet according to the present invention can be manufactured by using the manufacturing method as described above. That is, a steel sheet, a Zn-based alloy plating layer formed on at least one surface of the steel sheet, and a coating containing a rust inhibitor and a binder resin formed on the Zn-based alloy plating layer, Manufactures surface-treated steel sheets in which the concentration of the rust inhibitor in the coating at a position 10 nm away from the interface with the coating is 1.5 to 5.0 times the average concentration of the rust inhibitor in the coating can do.
- the average concentration and concentration distribution of the anticorrosive agent in the coating film, the average concentration of the bright pigment, the types of the antirust agent and the bright pigment, the types of the binder resin, and the chemical composition of the Zn-based alloy plating layer are varied.
- the surface treatment steel plate manufactured by changing those corrosion resistance, a brightness
- the surface-treated steel sheet according to the present invention will be described in more detail below with some examples. However, it is not intended that the specific examples described below limit the scope of the invention as set forth in the claims.
- ⁇ Preparation of surface-treated steel sheet sample> (Formation of Zn-based alloy plating layer) A cold-rolled steel sheet having a thickness of 1 mm is immersed in a hot-dip plating bath having a chemical composition of Al: about 11%, Mg: about 3%, and Zn: about 86% at about 450 ° C. for 3 to 5 seconds. A Zn-11% Al-3% Mg alloy plating layer having a thickness of about 10 ⁇ m was formed. Also, the composition of the dissolution plating bath was changed, and a Zn-1% Al-1% Mg alloy plating layer and Zn-40% Al-8% Mg alloy plating having a thickness of about 10 ⁇ m were applied on the cold-rolled steel sheet in the same procedure. A layer was formed.
- a cold rolled steel sheet having a thickness of 1 mm is placed in a hot-dip plating bath at about 450 ° C. with a chemical composition of Al: about 11%, Mg: about 3%, Si: about 1%, and Zn: about 85%. It was immersed for 2 seconds to form a Zn-11% Al-3% Mg-1% Si alloy plating layer having a thickness of about 10 ⁇ m on the cold-rolled steel sheet.
- the composition of the dissolution plating bath was changed, and a Zn-11% Al-3% Mg-0.4% Si alloy plating layer and Zn-11% Al having a thickness of about 10 ⁇ m were formed on the cold-rolled steel sheet in the same procedure. A ⁇ 3% Mg—1.5% Si alloy plating layer was formed.
- a polyester resin (molecular weight: 16,000; glass transition point: 10 ° C.) and a polyurethane resin (molecular weight: 10,000; glass transition point: 20 ° C.) are dispersed as an emulsion in an acidic solvent.
- the coating materials used in 3 to 21 and 25 to 36 were adjusted to have a pH of 3.0 to 5.0 using nitric acid or sodium hydroxide.
- the imino group type melamine resin was mixed therein. The concentration ratio between the polyester resin and the melamine resin was 100: 20.
- a paint was prepared by adding a rust inhibitor source and a luster pigment to the mixture. Sample No.
- the amount of the anticorrosive agent added to the paint is determined by measuring the average concentration (3%, 5%) of the anticorrosive agent in the desired paint film when measured using TEM-EDS based on the cross section of the obtained paint film. %, 10%, 13%, or 15%). Further, the concentration of the bright pigment was appropriately adjusted so that the average concentration was 10% or 5% when measured by GD-OES.
- the coating material prepared as described above was applied on a Zn-based alloy plating layer so that the average thickness of the coating film to be formed was 5 ⁇ m and cured by baking.
- the baking was performed at a heating rate of about 20 ° C./second and a steel plate temperature of about 200 ° C. until the paint was completely cured.
- the ratio of the concentration of the anticorrosive agent in the coating film at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film with respect to the average concentration of the anticorrosive agent in the coating film should appropriately change the pH of the coating material. And adjusted.
- the corrosion resistance was evaluated by observing the surface (planar portion) of the sample after 960 hours of the salt spray test with an optical microscope and determining the rust generation area ratio Z. Specifically, first, the surface of the sample was read with a scanner. Then, the area
- the surface-treated steel sheet samples were subjected to evaluation tests for corrosion resistance, luminance, work adhesion and storage stability as described above, and the respective scores were determined. The obtained results are shown in Table 1.
- Sample No. 1 and 2 the pH of the coating is high, and the ratio of the concentration of the rust inhibitor at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film is 1 with respect to the average concentration of the rust inhibitor in the coating film. Since it was less than .5, the concentration of the rust preventive agent was insufficient, the concentrated region did not function sufficiently as a barrier layer for protecting the Zn-based alloy plating layer, and the corrosion resistance was insufficient. Sample No.
- the pH of the paint is low, and the ratio of the concentration of the rust inhibitor at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film with respect to the average concentration of the rust inhibitor in the coating film is 5 Since it was over 0.0, the corrosion resistance was insufficient. This is because, when processed to obtain the test material, the coating film cohesively breaks in the concentrated region of the rust preventive agent, the work adhesion decreases, and as a result, the corrosion resistance in the processed part deteriorates. it is conceivable that. Sample No. In No. 24, since the pH of the paint was alkaline and the paint was solidified at the time of preparing the paint and a coating film could not be formed, the corrosion resistance, luminance and work adhesion could not be evaluated.
- Sample No. 3-21 no. 25 to 36, the ratio of the concentration of the rust inhibitor at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film with respect to the average concentration of the rust inhibitor in the coating film is 1.5 or more and 5.0. Since it was the following, it had excellent corrosion resistance. In particular, a sample containing either or both of P and V as a rust preventive agent had better corrosion resistance.
- the coating film contained a bright pigment, and thus had sufficient luminance. Furthermore, the brightness pigment was more excellent in the sample in which the bright pigment contained one or both of aluminum (Al) and oxide (SiO 2 , alumina, mica). In particular, in addition to Al or SiO 2 , a sample further containing a metal Rh, Ti or Ag having high luminance in the coating film had extremely high luminance.
- Sample No. 14-17 and no. 35 is a sample in which the average concentration of the rust inhibitor in the coating film is changed. All samples had sufficient corrosion resistance.
- the present invention since there is a concentrated region of the rust inhibitor near the interface between the Zn-based alloy plating layer and the coating film, a surface-treated steel sheet having high corrosion resistance can be provided. Thereby, it becomes possible to provide sufficient corrosion resistance and designability as a steel plate used for building materials and products for home appliances. Therefore, the present invention can be said to be an invention with extremely high industrial value.
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Abstract
Description
(1)
鋼板、前記鋼板の少なくとも片面に形成されたZn系合金めっき層、及び前記Zn系合金めっき層上に形成された防錆剤とバインダー樹脂とを含む塗膜を有し、
前記Zn系合金めっき層の化学組成が、質量%で、
Al:0.01~60%、
Mg:0.001~10%、及び
Si:0~2%であり、
前記Zn系合金めっき層と前記塗膜との界面から10nm離れた位置における前記塗膜中の前記防錆剤の濃度が、前記塗膜中の前記防錆剤の平均濃度の1.5~5.0倍であることを特徴とする、表面処理鋼板。
(2)
前記防錆剤が、P、V及びMgの少なくとも1種を含むことを特徴とする、(1)に記載の表面処理鋼板。
(3)
前記塗膜中の前記防錆剤の平均濃度が、質量%で、3~15%であることを特徴とする、(1)又は(2)に記載の表面処理鋼板。
(4)
前記塗膜が光輝顔料をさらに含み、前記光輝顔料が、アルミニウム及び酸化物の少なくとも1種を含むことを特徴とする、(1)~(3)のいずれか1つに記載の表面処理鋼板。
(5)
前記酸化物が、アルミナ、シリカ、マイカ、ジルコニア、チタニア、ガラス、又は酸化亜鉛であることを特徴とする、(4)に記載の表面処理鋼板。
(6)
前記光輝顔料が、Rh、Cr、Ti、Ag、及びCuの少なくとも1種をさらに含むことを特徴とする、(4)又は(5)に記載の表面処理鋼板。
(7)
前記塗膜中の前記光輝顔料の平均濃度が、質量%で、5~15%であることを特徴とする、(4)~(6)のいずれか1つに記載の表面処理鋼板。
本発明の表面処理鋼板は、鋼板、鋼板の少なくとも片面に形成されたZn系合金めっき層、及びZn系合金めっき層上に形成された防錆剤とバインダー樹脂とを含む塗膜を有し、前記Zn系合金めっき層の化学組成が、質量%で、Al:0.01~60%、Mg:0.001~10%、及びSi:0~2%であり、Zn系合金めっき層と塗膜との界面から10nm離れた位置における前記塗膜中の防錆剤の濃度が、塗膜中の防錆剤の平均濃度の1.5~5.0倍であることを特徴とする。以下、本発明に係る表面処理鋼板の構成要件について説明する。
本発明における鋼板(めっき原板)としては、特に限定されず、熱延鋼板、冷延鋼板などの一般的な鋼板を使用することができる。鋼種も、特に限定されず、例えばAlキルド鋼、Ti、Nbなどを含有した極低炭素鋼、及びこれらにP、Si、Mnなどの元素を含有した高張力鋼などを使用することが可能である。本発明における鋼板の板厚は、特に限定されないが、例えば、0.25~3.5mmであればよい。
本発明におけるZn系合金めっき層は鋼板上に形成されている。このZn系合金めっき層は鋼板の片面に形成されていても、両面に形成されていてもよい。Zn系合金めっき層は、少なくともAlとMgとを含有するZn-Al-Mg合金めっき層であってもよく、さらにSiを含有するZn-Al-Mg-Si合金めっき層であってもよい。これらの各含有量(濃度)は、質量%で、Al:0.01~60%、Mg:0.001~10%、Si:0~2%であり、残部がZn及び不純物である。以下、Zn系合金めっき層の化学組成について単に「%」と記した場合は、「質量%」を意味するものとする。
本発明における塗膜はZn系合金めっき層上に形成されている。塗膜中には、防錆剤とバインダー樹脂とを含む。表面処理鋼板の輝度を向上させるために、好ましくは、さらに塗膜中に光輝顔料を含むとよい。本発明に係る表面処理鋼板における塗膜中では、防錆剤は、微細な化合物(例えば、P化合物やV化合物)として存在している。このように防錆剤を塗膜中で微細な化合物として存在させ、かつ、上述したように塗膜とZn系合金めっき層との界面領域に防錆剤の濃化領域を形成するために、本発明における塗膜を形成するための塗料には、例えばpH3.0~5.0の酸性の塗料を用いることが有効である。なお、防錆剤は塗膜中でミクロに分散しているため、通常の分析方法では、塗膜中において、微細な防錆剤と、塗膜を形成するバインダー樹脂とを明確に区別して特定するのは困難であり、塗膜中では、防錆剤とバインダー樹脂とが同じ領域に分布しているように観測される。したがって、本発明において、塗膜中に「防錆剤を含む」とは、上記微細な化合物を構成する防錆機能を発揮する元素、例えばP、V、Mgの元素を塗膜中に含むことを意味する。よって、後述する防錆剤の「濃度」とは、例えばP、V、Mgの元素の濃度(含有量)の合計を意味し、その単位は質量%とする。
本発明の塗膜の成分として使用されるバインダー樹脂は、酸性の溶媒中で使用可能な樹脂であれば特に限定されないが、例えば、ポリエステル樹脂、ウレタン樹脂、又はアクリル樹脂であるとよい。バインダー樹脂の硬化剤としては、酸性の溶媒中で使用可能であり、上記のバインダー樹脂を硬化させることができるものであれば特に限定されないが、例えば、メラミン樹脂、イソシアネート樹脂、又はエポキシ樹脂などを使用することができる。好ましくは、本発明におけるバインダー樹脂はポリエステル樹脂であり、硬化剤はメラミン樹脂である。また、ポリエステル樹脂は、-20~70℃のガラス転移温度Tgと、3000~30000の平均分子量を有するものが好ましい。バインダー樹脂がウレタン樹脂の場合、Tgは0~50℃、数平均分子量は5000~25000のものが好ましい。バインダー樹脂がアクリル樹脂の場合、Tgは0~50℃、数平均分子量は3000~25000のものが好ましい。
本発明に係る表面処理鋼板の耐食性を向上させるために、防錆剤(典型的にP及び/又はV)が塗膜中に含まれる。本発明における防錆剤は、上述したように、塗膜中で略均一に微細な化合物として存在しているが、本発明においては、「防錆剤」とは防錆剤を構成する防錆機能を発揮する元素、例えばP元素、V元素、Mg元素を意味する。このように塗膜中に微細な化合物として存在する防錆剤は水に可溶であるため、塗膜が例えば湿潤環境下に晒された場合、塗膜中の防錆剤が水に溶解して防錆剤の成分が溶出し、Zn系合金めっき層の腐食を抑制する防錆機能を発揮することができる。また、上述したように、Zn系合金めっき層と塗膜との界面付近の濃化領域では、防錆剤の成分(例えばP、Vなど)とZn系合金めっき層中の成分との反応生成物を形成しており、この反応生成物の存在する領域が腐食因子のバリア領域として作用する。したがって、本発明に係る表面処理鋼板は、防錆剤が塗膜中に微細な化合物として存在し、かつ、Zn系合金めっき層と塗膜との界面領域に防錆剤の濃化領域を有するため、優れた耐食性を有している。
本発明に係る表面処理鋼板において、上述した防錆剤に加え、意匠性を向上させるために、光輝顔料が塗膜中に含まれると好ましい。本明細書で使用される場合、「光輝顔料」とは、表面で光が反射する顔料を意味する。なお、光輝顔料には、塗膜を作製するための酸性塗料中で溶解せず、塗料に添加した状態のまま塗膜中に含まれるものを用いる。したがって、本発明において、塗膜中に「光輝顔料を含む」とは、以下で説明する金属単体、酸化物又は合金などを塗膜中に含むことを意味し、塗膜中においては、光輝顔料と、塗膜を形成するバインダー樹脂とを明確に区別して特定することが可能である。よって、後述する光輝顔料の「濃度」とは、以下で説明する金属単体、酸化物又は合金などとしての合計濃度を意味する。
本発明に係る表面処理鋼板の製造方法を以下で説明する。本発明に係る表面処理鋼板は、例えば、鋼板上に形成されたZn系合金めっき層上に、少なくとも防錆剤とバインダー樹脂とを含むpH3.0~5.0の酸性の塗料を塗布し、加熱して塗料を硬化させることで製造することができる。
鋼板としては、任意の板厚及び化学組成を有するものを使用することができる。例えば、板厚0.25~3.5mmの冷延鋼板を使用することができる。また、Zn系合金めっき層は、例えば、400~550℃のZn-Al-Mg溶融めっき浴又はZn-Al-Mg-Si溶融めっき浴を用いて5~30μmの厚さで形成することができる。
塗料は、例えば、溶媒に分散させたバインダー樹脂と、硬化剤とを混合して、次いで、その混合物中に所定量の防錆剤源と、任意選択で光輝顔料とを分散させることで得ることができる。混合の順序は異なってもよい。バインダー樹脂としては、特に限定されないが、ポリエステル樹脂、ウレタン樹脂又はアクリル樹脂などを使用することができ、硬化剤としてはメラミン樹脂などを使用することができる。また、溶媒としては酸性のものを使用し、防錆剤源としてはその酸性溶媒中に溶解するもの、例えばP化合物、V化合物、Mg化合物又はそれらの2種以上を用いることができる。一方、光輝顔料としては、酸性溶媒中で溶解しない顔料から適宜選択することができる。バインダー樹脂と硬化剤との比は適宜決定することができるが、例えば、1:1~9:1の範囲であることができる。
次いで、得られた塗料をZn系合金めっき層上に塗膜が所定の厚さになるように塗布し、焼付け、硬化させる。塗料の塗布方法は、特に限定されず、当業者に公知な任意の塗布方法により行うことができ、例えばロールコーターなどで行えばよい。焼付けは、塗料が硬化する任意の加熱条件で行うことができ、例えば、5~70℃/秒の加熱速度で180~230℃の鋼板温度になるように加熱する。
(Zn系合金めっき層の形成)
厚さ1mmの冷延鋼板を、化学組成がAl:約11%、Mg:約3%、及びZn:約86%の約450℃の溶融めっき浴に3~5秒間浸漬し、冷延鋼板上に約10μmの厚さのZn-11%Al-3%Mg合金めっき層を形成した。また、溶解めっき浴の組成を変更し、同様の手順で冷延鋼板上に約10μmの厚さのZn-1%Al-1%Mg合金めっき層及びZn-40%Al-8%Mg合金めっき層を形成した。あるいは、厚さ1mmの冷延鋼板を、化学組成がAl:約11%、Mg:約3%、Si:約1%、及びZn:約85%の約450℃の溶融めっき浴に3~5秒間浸漬し、冷延鋼板上に約10μmの厚さのZn-11%Al-3%Mg-1%Si合金めっき層を形成した。また、溶解めっき浴の組成を変更し、同様の手順で冷延鋼板上に約10μmの厚さのZn-11%Al-3%Mg-0.4%Si合金めっき層及びZn-11%Al-3%Mg-1.5%Si合金めっき層を形成した。
酸性の溶媒中にバインダー樹脂としてポリエステル樹脂(分子量:16,000;ガラス転移点:10℃)及びポリウレタン樹脂(分子量:10000;ガラス転移点:20℃)をエマルジョンとして分散させ、試料No.3~21及び25~36で使用した塗料については、硝酸又は水酸化ナトリウムを用いてpHが3.0~5.0になるように調整した。その中にイミノ基型メラミン樹脂を混合した。ポリエステル樹脂とメラミン樹脂との濃度の比は100:20であった。次いで、その混合物中に、防錆剤源及び光輝顔料を添加して塗料を調製した。なお、試料No.1、2及び24で使用した塗料については、pHが5.0超となるように調整し、試料No.22及び23で使用した塗料については、pHが3.0未満となるように調整した。各試料で使用した塗料のpHを表1に示す。そして、No.25については光輝顔料を添加しなかった。防錆剤としてP、V及びMgを含む試料についての防錆剤源としては、それぞれ、オルトリン酸、五酸化バナジウム及び硫酸マグネシウムを使用した。光輝顔料としては、表1に記載のものを使用した。
上記のように調製した塗料を、形成される塗膜の平均厚さが5μmになるようにZn系合金めっき層上に塗布し、焼付けることで硬化させた。焼付けは、約20℃/秒の加熱速度、及び約200℃の鋼板温度とし、塗料が完全に硬化するまで行った。
上記のように表面処理鋼板の試料を作成し、表1に示したような各試料について以下のように耐食性、輝度、加工密着性及び貯蔵安定性の評価試験を行った。
それぞれの試料について、実使用の模擬であるエリクセン試験(JIS Z2247:2006)に準ずる加工(7mm押し出し)により試験用の0.6mmの供試材を得て、その供試材に対して、耐食性の評価試験として塩水噴霧試験(JASO M609-91法に準拠)を行った。この塩水噴霧試験は、(1)塩水噴霧2時間(5%NaCl、35℃);(2)乾燥4時間(60℃);及び(3)湿潤2時間(50℃、湿度95%以上)を1サイクルとして合計120サイクル(合計960時間)実施した。端面からの腐食を防ぐため、各試料の端面はテープによりシールして試験した。
評点8:Z=0%
評点7:0%<Z≦5%
評点6:5%<Z≦10%
評点5:10%<Z≦20%
評点4:20%<Z≦30%
評点3:30%<Z≦40%
評点2:40%<Z≦50%
評点1:50%<Z
それぞれの試料について、無作為に抽出した10人の試験者に試料の表面を目視で観察させ、以下のように「輝度レベル」を1点から5点で評価させた。
1点:金属外観が全く確認されない又は金属外観がわずかに確認される
2点:金属外観が確認されるが、正面から観察して外観ムラが容易に確認される
3点:金属外観が確認されるが、正面から観察して外観ムラがわずかに確認される
4点:金属外観が全体に確認されるが、斜めから観察して外観ムラがわずかに観察される
5点:金属外観が全体に確認される
評点8:40<合計点
評点7:35<合計点≦40
評点6:30<合計点≦35
評点5:25<合計点≦30
評点4:20<合計点≦25
評点3:15<合計点≦20
評点2:10<合計点≦15
評点1:合計点=10
上述したように、実使用の模擬であるエリクセン試験(JIS Z2247:2006)に準ずる加工(7mm押し出し)により試験用の0.6mmの供試材を得た。その供試材に対して、幅24mmのセロハン粘着テープ(ニチバン社製セロテープ:登録商標)を塗膜に密着させた後、45度の角度で急激に引き剥がした。剥離した塗膜面積から、剥離面積率Z’を求め、以下の基準で評価した。
評点5:0%(剥離なし)<Z’≦5%
評点4:5%<Z’≦10%
評点3:10%<Z’≦30%
評点2:30%<Z’≦50%
評点1:50%<Z’
表1に記載のpHで調製した塗料100gを25℃に維持し、Zn-11%Al-3%Mg合金めっき鋼板を浸漬した。浸漬して60分経過した後の塗料を目視で観察し、浸漬前(塗料調製時)と浸漬後の塗料の状態に応じて以下のように各試料の貯蔵安定性の評点を決定した。評点3以上を貯蔵安定性の合格点とした。
評点5:鋼板浸漬の前後で塗料に変化が認められない
評点4:鋼板浸漬の前後で塗料に変色又は粘度増大のいずれかが認められる
評点3:鋼板浸漬の前後で塗料に変色及び粘度増大の両方が認められる
評点2:鋼板浸漬後に塗料が固化(ゲル化)
評点1:浸漬前(塗料調製時)に固化(ゲル化)
Claims (7)
- 鋼板、前記鋼板の少なくとも片面に形成されたZn系合金めっき層、及び前記Zn系合金めっき層上に形成された防錆剤とバインダー樹脂とを含む塗膜を有し、
前記Zn系合金めっき層の化学組成が、質量%で、
Al:0.01~60%、
Mg:0.001~10%、及び
Si:0~2%であり、
前記Zn系合金めっき層と前記塗膜との界面から10nm離れた位置における前記塗膜中の前記防錆剤の濃度が、前記塗膜中の前記防錆剤の平均濃度の1.5~5.0倍であることを特徴とする、表面処理鋼板。 - 前記防錆剤が、P、V及びMgの少なくとも1種を含むことを特徴とする、請求項1に記載の表面処理鋼板。
- 前記塗膜中の前記防錆剤の平均濃度が、質量%で、3~15%であることを特徴とする、請求項1又は2に記載の表面処理鋼板。
- 前記塗膜が光輝顔料をさらに含み、前記光輝顔料が、アルミニウム及び酸化物の少なくとも1種を含むことを特徴とする、請求項1~3のいずれか1項に記載の表面処理鋼板。
- 前記酸化物が、アルミナ、シリカ、マイカ、ジルコニア、チタニア、ガラス、又は酸化亜鉛であることを特徴とする、請求項4に記載の表面処理鋼板。
- 前記光輝顔料が、Rh、Cr、Ti、Ag、及びCuの少なくとも1種をさらに含むことを特徴とする、請求項4又は5に記載の表面処理鋼板。
- 前記塗膜中の前記光輝顔料の平均濃度が、質量%で、5~15%であることを特徴とする、請求項4~6のいずれか1項に記載の表面処理鋼板。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003118033A (ja) * | 2001-10-17 | 2003-04-23 | Nisshin Steel Co Ltd | 親水性に富む下層塗膜を設けた金属板及び塗装金属板 |
JP2004082120A (ja) * | 2000-02-22 | 2004-03-18 | Nippon Paint Co Ltd | 熱線遮蔽板 |
JP2006159435A (ja) * | 2004-12-02 | 2006-06-22 | Nippon Steel Corp | 耐エッジクリープ性に優れた有機被覆鋼板 |
JP2011179057A (ja) * | 2010-02-26 | 2011-09-15 | Jfe Steel Corp | 亜鉛系めっき鋼板用の表面処理液ならびに亜鉛系めっき鋼板およびその製造方法 |
JP2012067369A (ja) * | 2010-09-24 | 2012-04-05 | Jfe Steel Corp | 亜鉛系めっき鋼板用の表面処理液ならびに亜鉛系めっき鋼板およびその製造方法 |
WO2017164234A1 (ja) * | 2016-03-22 | 2017-09-28 | 新日鐵住金株式会社 | プレコート金属板 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6214132B1 (en) * | 1997-03-07 | 2001-04-10 | Henkel Corporation | Conditioning metal surfaces prior to phosphate conversion coating |
JP3124266B2 (ja) | 1999-06-22 | 2001-01-15 | 新日本製鐵株式会社 | 塗膜密着性と加工部の耐食性に優れ環境負荷の小さい塗装鋼板 |
JP2005015834A (ja) | 2003-06-25 | 2005-01-20 | Nippon Steel Corp | 耐食性に優れ溶接可能な高耐食性塗装鋼板 |
JP2005048200A (ja) * | 2003-07-29 | 2005-02-24 | Jfe Steel Kk | 耐食性および皮膜外観に優れる表面処理鋼板 |
JP4461866B2 (ja) * | 2004-03-24 | 2010-05-12 | Jfeスチール株式会社 | 耐食性および曲げ加工性に優れた溶融Zn−Al系合金めっき鋼板およびその製造方法 |
WO2009004684A1 (ja) * | 2007-06-29 | 2009-01-08 | Nihon Parkerizing Co., Ltd. | 亜鉛系めっき鋼板用水系表面処理液及び亜鉛系めっき鋼板 |
JP4920625B2 (ja) | 2008-04-07 | 2012-04-18 | 新日本製鐵株式会社 | 表面処理金属板 |
BRPI1007387B1 (pt) * | 2009-01-16 | 2019-11-19 | Nippon Steel & Sumitomo Metal Corp | material de aço revestido com liga de zn-al-mg-si-cr por imersão a quente e seu método para produção |
JP5814941B2 (ja) * | 2010-12-22 | 2015-11-17 | 関西ペイント株式会社 | 耐食性に優れる塗料組成物 |
JP5408385B2 (ja) * | 2011-08-24 | 2014-02-05 | 新日鐵住金株式会社 | 表面処理溶融めっき鋼材 |
JP5835775B2 (ja) | 2012-03-21 | 2015-12-24 | 関西ペイント株式会社 | 亜鉛メッキ又は亜鉛合金メッキ鋼板用防錆塗料組成物 |
EP2963152B1 (en) * | 2013-02-28 | 2020-07-15 | Nippon Steel Coated Sheet Corporation | Steel sheet plated with aluminum-containing zinc and process for producing same |
JP6080670B2 (ja) | 2013-04-22 | 2017-02-15 | 日本パーカライジング株式会社 | 塗装鋼板用下地処理組成物、並びに下地処理されためっき鋼板およびその製造方法、塗装めっき鋼板およびその製造方法 |
CN105793468B (zh) | 2013-11-20 | 2017-05-31 | 新日铁住金株式会社 | 耐黑变性和耐腐蚀性优异的镀锌钢板及其制造方法 |
CA2931667C (en) * | 2013-11-29 | 2020-03-24 | Nisshin Steel Co., Ltd. | Method for treating surface of zinc-aluminum-magnesium alloy-plated steel sheet |
US10232589B2 (en) * | 2014-03-28 | 2019-03-19 | Nippon Steel & Sumitomo Metal Corporation | Plated steel sheet with quasicrystal |
WO2016203703A1 (ja) * | 2015-06-15 | 2016-12-22 | Jfeスチール株式会社 | 表面処理亜鉛系めっき鋼板およびその製造方法 |
JP6087461B1 (ja) * | 2016-04-26 | 2017-03-01 | 日本ペイント・インダストリアルコ−ティングス株式会社 | 表面処理鋼材 |
-
2019
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004082120A (ja) * | 2000-02-22 | 2004-03-18 | Nippon Paint Co Ltd | 熱線遮蔽板 |
JP2003118033A (ja) * | 2001-10-17 | 2003-04-23 | Nisshin Steel Co Ltd | 親水性に富む下層塗膜を設けた金属板及び塗装金属板 |
JP2006159435A (ja) * | 2004-12-02 | 2006-06-22 | Nippon Steel Corp | 耐エッジクリープ性に優れた有機被覆鋼板 |
JP2011179057A (ja) * | 2010-02-26 | 2011-09-15 | Jfe Steel Corp | 亜鉛系めっき鋼板用の表面処理液ならびに亜鉛系めっき鋼板およびその製造方法 |
JP2012067369A (ja) * | 2010-09-24 | 2012-04-05 | Jfe Steel Corp | 亜鉛系めっき鋼板用の表面処理液ならびに亜鉛系めっき鋼板およびその製造方法 |
WO2017164234A1 (ja) * | 2016-03-22 | 2017-09-28 | 新日鐵住金株式会社 | プレコート金属板 |
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