WO2004003253A1 - 表面処理亜鉛系めっき鋼板およびその製造方法 - Google Patents
表面処理亜鉛系めっき鋼板およびその製造方法 Download PDFInfo
- Publication number
- WO2004003253A1 WO2004003253A1 PCT/JP2003/008152 JP0308152W WO2004003253A1 WO 2004003253 A1 WO2004003253 A1 WO 2004003253A1 JP 0308152 W JP0308152 W JP 0308152W WO 2004003253 A1 WO2004003253 A1 WO 2004003253A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- metal salt
- steel sheet
- treated
- metal
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 138
- 239000002184 metal Substances 0.000 title claims abstract description 138
- 239000011701 zinc Substances 0.000 title claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
- 239000010959 steel Substances 0.000 title claims abstract description 78
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 69
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 96
- 229920005989 resin Polymers 0.000 claims abstract description 96
- 150000003839 salts Chemical class 0.000 claims abstract description 85
- 238000004381 surface treatment Methods 0.000 claims abstract description 50
- 238000007747 plating Methods 0.000 claims abstract description 48
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- 238000000576 coating method Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 15
- 229910019142 PO4 Inorganic materials 0.000 claims description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 28
- 239000010452 phosphate Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 25
- 229910052748 manganese Inorganic materials 0.000 claims description 23
- 239000000314 lubricant Substances 0.000 claims description 19
- 229910052749 magnesium Inorganic materials 0.000 claims description 17
- 239000000376 reactant Substances 0.000 claims description 17
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 15
- 239000008397 galvanized steel Substances 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 229910052720 vanadium Inorganic materials 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 6
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 50
- 230000007797 corrosion Effects 0.000 abstract description 49
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052804 chromium Inorganic materials 0.000 abstract description 9
- 239000011651 chromium Substances 0.000 abstract description 9
- 150000001845 chromium compounds Chemical class 0.000 abstract description 5
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 76
- 239000000178 monomer Substances 0.000 description 31
- 239000011572 manganese Substances 0.000 description 30
- 235000021317 phosphate Nutrition 0.000 description 28
- 239000000243 solution Substances 0.000 description 27
- 238000012545 processing Methods 0.000 description 26
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 21
- 239000011777 magnesium Substances 0.000 description 16
- -1 inorganic acid salt Chemical class 0.000 description 14
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 11
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 9
- 238000000465 moulding Methods 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 8
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 7
- 239000012756 surface treatment agent Substances 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 125000002813 thiocarbonyl group Chemical group *C(*)=S 0.000 description 3
- 230000002087 whitening effect Effects 0.000 description 3
- 238000004876 x-ray fluorescence Methods 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 2
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 229940005657 pyrophosphoric acid Drugs 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- 229940126062 Compound A Drugs 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 125000005907 alkyl ester group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- UDSAIICHUKSCKT-UHFFFAOYSA-N bromophenol blue Chemical compound C1=C(Br)C(O)=C(Br)C=C1C1(C=2C=C(Br)C(O)=C(Br)C=2)C2=CC=CC=C2S(=O)(=O)O1 UDSAIICHUKSCKT-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910001463 metal phosphate Inorganic materials 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 150000002763 monocarboxylic acids Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 229940085991 phosphate ion Drugs 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- QVLTXCYWHPZMCA-UHFFFAOYSA-N po4-po4 Chemical compound OP(O)(O)=O.OP(O)(O)=O QVLTXCYWHPZMCA-UHFFFAOYSA-N 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- SDKPSXWGRWWLKR-UHFFFAOYSA-M sodium;9,10-dioxoanthracene-1-sulfonate Chemical compound [Na+].O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2S(=O)(=O)[O-] SDKPSXWGRWWLKR-UHFFFAOYSA-M 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 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
- 238000003911 water pollution Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 150000003755 zirconium compounds Chemical class 0.000 description 1
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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
- C23C22/48—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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/53—Treatment of zinc or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/51—One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12556—Organic component
- Y10T428/12569—Synthetic resin
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
- Y10T428/12799—Next to Fe-base component [e.g., galvanized]
Definitions
- the present invention relates to a surface-treated galvanized steel sheet and a method for producing the same.
- the present invention relates to a surface-treated galvanized steel sheet manufactured using a surface treatment solution containing no chromium or a chromium compound and having excellent corrosion resistance, electrical conductivity, and workability comparable to a chromate-treated steel sheet, and a method for manufacturing the same. Things. Background art
- Zinc-plated steel sheets are widely used in building materials, automobiles, home appliances, and so on.
- automobiles, home appliances, copiers and other motor products that require corrosion resistance are widely used for motor products used in them, such as zinc-coated steel sheets and surface-treated steel sheets that have been subjected to chromate treatment for the purpose of improving corrosion resistance.
- Chromate has the effect of improving the corrosion resistance of galvanized steel sheets due to its self-healing action.
- it is necessary to perform special wastewater treatment specified in the Water Pollution Control Law which is a factor that increases manufacturing costs. Therefore, a surface treatment technique that does not use chromium is required to prevent the occurrence of whitening of steel sheets, particularly zinc-based plated steel sheets.
- Japanese Patent Laid-Open No. 5- 195244 (a) at least four fluorine atoms, yin I O emissions component comprising at least one element such as titanium or zirconium (e.g., TiF 6 2 - at the indicated Metal surface treatment technology with a chromium-free composition containing (b) a positive electrode component such as cobalt and magnesium, (c) a free acid for pH control, and (d) an organic resin.
- a positive electrode component such as cobalt and magnesium
- a free acid for pH control e.g., a free acid for pH control
- an organic resin e.g., chromium-free
- JP-A-11- 350157 containing (a) phosphate compounds of A1, (b) Mn, Mg , Ca, 1 kind or 2 or more kinds of Sr compound, (c) Si0 2, an aqueous organic resin Emarujiyon
- JP-A-11-50010 discloses (a) a resin having a polyhydroxyether segment and a copolymer segment of an unsaturated monomer, (b) phosphate phosphate (c) calcium, cobalt, iron,
- a chromium-free metal surface treatment composition containing a phosphate of a metal such as manganese or zinc has been proposed.
- JP-A-2000-199077 discloses, (a) Al C 5 H 7 0 2) 3, V (C 5 H 7 0 2) 3, V0 C 5 H 7 0 2) 2, Zn (C 5 H 7 0 2 ) 2 and at least one metal acetyl acetate selected from the group consisting of Zr (C 5 H 7 0 2 ) 2 ; (b) water-soluble inorganic titanium compound and water-soluble inorganic zirconium compound A metal surface treatment liquid characterized by having at least one selected compound has been proposed.
- Japanese Patent Application Laid-Open No. 2001-164182 discloses an aqueous anti-corrosion coating agent containing (a) a thiocarbonyl group-containing compound, (b) a phosphate ion, (c) water-dispersible silica, and a hydrolyzed condensate.
- a method for coating zinc-coated steel has been proposed. Sulfides such as thiocarbonyl group-containing compounds used in this method have the property of easily adsorbing to metal surfaces such as zinc, and thiocalponyl groups form a zinc active during coating by synergistic action with phosphate ions. It is adsorbed to the site on the surface and exerts a protective effect.
- the zinc-coated steel sheet obtained by this surface treatment method has high corrosion resistance when its surface is coated with a layer having one NCS or 10CS group, but the problem is that this layer has no conductivity. .
- the thickness of the coating is reduced to ensure conductivity, a portion not coated with the thiocarbonyl-containing compound appears, which may cause emission. That is, even with this method, it is impossible to achieve both corrosion resistance and conductivity.
- the above-mentioned five conventional techniques are all based on the idea of firmly adhering the metal surface and the film formed by the surface treatment agent at the interface. If captured microscopically, the metal surface and the surface treatment agent cannot be completely adhered to each other, so that there is a limit to improving the adhesion. Therefore, in such conventional technologies, it is important to improve the corrosion resistance, not the adhesion, but to improve the denseness of the coating by the surface treatment agent. Not considered at all.
- An object of the present invention is to provide a chromium-free surface treatment substrate having excellent corrosion resistance and conductive workability comparable to general-purpose chromated zinc-coated steel sheets.
- An object of the present invention is to provide a lead-based steel sheet and a method for producing the same.
- corrosion resistance the goal is to satisfy both the flat plate corrosion resistance and the post-process corrosion resistance.
- the method of the present invention does not use chromium or a chromium compound, and eliminates the need for a special drainage treatment in the step of coating the surface treatment solution and the use of the obtained surface-treated steel sheet. Disclosure of the invention
- the present invention has a zinc-based plating layer on the surface of a steel sheet, a reaction product of a metal salt and the plating metal on the plating layer, and a resin having a mass ratio of 1 to 50 mass% to the metal salt.
- the surface-treated film has a layer mainly composed of the reactant having a thickness of 0.02 to 3 / ra, and the reactant is a layer mainly composed of the reactant.
- This is a surface-treated galvanized steel sheet containing 20 vol% or more of the resin.
- the surface-treated coating further contains a lubricant.
- the metal salt is a phosphate, a nitrate, a carbonate, or a sulfate of at least one metal selected from the group consisting of Al, Mn, Mg, V, and Zn.
- at least one selected from the group consisting of acetate and hydroxide is used.
- a zinc-based plated steel sheet contains a metal salt and a resin having a mass ratio of 1 to 50 mass% to the metal salt, has a pH of 1 to 4, and has a 0.1N sodium hydroxide equivalent.
- invention in free acidity is treated with the treatment liquid is 3 to 20, the manufacturing method of the 0.5 as the amount of the metal salt 05-3.
- surface-treated zinc-based plated steel plate to deposit solids 0 g / m 2 Also provide.
- the treatment liquid further contains a lubricant.
- the metal salt is phosphate, nitrate, carbonate, sulfate, acetate, or water of at least one metal selected from the group consisting of Al, Mn, Mg, V, and Zn. At least one selected from the group consisting of oxides Is preferred.
- any of the above-mentioned production methods comprises a step of coating the surface of the zinc-coated steel sheet with the treatment liquid, and a step of heating and drying the coated portion.
- FIG. 1 is a graph showing the component distribution of each layer by GDS of the surface-treated zinc-based steel sheet of the present invention.
- FIG. 2 is a view for explaining how to determine the ratio of the resin present in the intermediate layer.
- Fig. 3 is a graph showing the component distribution of each layer by GDS of the comparative material.
- the present inventors have made intensive studies on means for achieving the above object, and as a result, by applying a surface treatment solution containing a resin and a metal salt to the surface of a zinc-based plated steel sheet without performing chromate coating. In particular, they have found that a film having excellent corrosion resistance and electrical conductivity and also excellent corrosion resistance after press forming and processing can be formed, and the present invention has been completed.
- the zinc-coated plated steel sheet to be subjected to the surface treatment of the present invention is a plated steel sheet containing zinc, and is not particularly limited.
- electro-zinc plated steel sheet electro-zinc-nickel plated steel sheet, hot-dip galvanized steel sheet, and zinc-galvanized hot-dip steel sheet.
- the surface-treated galvanized steel sheet of the present invention has a surface-treated coating containing a reaction product of a metal salt and a zinc-based plated metal and a resin on the surface of the plating layer of the galvanized steel sheet.
- the “metal salt” is defined as a metal salt of an acid or a metal hydroxide. Incidentally, most of the metal salts have conductivity.
- This surface-treated coating mainly contains a reaction product of a metal and a metal salt in the surface layer of the zinc-based plating layer applied to the surface of the steel sheet, and the reaction product has strong ion bonding, that is, a metal salt. Bonding between the dissociated ions and the metal ions in the plating layer forms a strong adhesion state with the zinc-based plating layer, resulting in excellent corrosion resistance.
- the layer mainly containing this reactant needs to have a thickness of 0.02 to 3 // m in the surface treatment film. That is, if the thickness of this layer is less than 0.02 ⁇ , the bonding between the zinc plating layer and the surface treatment film becomes insufficient, and the corrosion resistance deteriorates. On the other hand, if it exceeds 3 / m, peeling is likely to occur in the layer mainly composed of the reactant when performing processing such as bending, and the press-formability deteriorates because the adhesion of the surface-treated coating deteriorates. I do. In particular, the appearance after processing deteriorates.
- the layer mainly composed of the reaction product between the metal salt and the plating metal (hereinafter sometimes simply referred to as “plating metal”) is formed by dissociation ions of the metal salt penetrating from the surface of the plating layer to the inside.
- the thickness is formed by reacting with the plating metal, so that the dissociated ions of the metal salt penetrate into the plating layer from the plating layer surface (the plating layer surface before the layer containing the reactant is formed). Equivalent to depth. Therefore, the thickness of the layer having the reactant can be measured by, for example, glow discharge spectroscopy (hereinafter abbreviated as GDS) or the like in the depth direction of the metal salt component.
- GDS glow discharge spectroscopy
- the metal salt may be at least one metal selected from the group consisting of Al, Mn, Mg, V, and Zn, selected from the group consisting of phosphate, nitrate, carbonate, sulfate, acetate, and hydroxide. It is preferable to use at least one selected from them. More preferably, an inorganic acid salt of a metal of Mg, Mn and V is used in combination with an inorganic acid salt of zinc, or a hydroxide of Mg, Mn and V is used in combination with a hydroxide of zinc. .
- the surface treatment film is mainly formed by reacting a metal salt with a zinc-based plating metal. It is characterized by containing a resin.
- the resin does not form a layer completely separated from the layer mainly containing the reactant of the metal salt and the plating metal, but includes a predetermined amount of resin in the layer mainly containing the reactant. Must be present.
- the presence of the resin in the layer where the metal salt reacts with the plating metal to form a strong bond also enhances the adhesion between the resin and the reactant layer, resulting in a surface-treated coating even after processing the steel sheet. Since no peeling occurs, the appearance is good after processing.
- the plated metal also includes constituent elements of the steel sheet diffused into the plated layer by heat treatment or the like.
- the reaction product of the metal salt and the plating metal and the resin are not laminated with a clear boundary, but a layer mainly containing the reaction product of the metal salt and the plating metal.
- the resin has a concentration distribution such that the concentration gradually increases in the thickness direction of the layer. In other words, the resin coexists with the reactant of the metal salt and the zinc-based plating metal while gradually increasing the ratio from the plating layer side.
- Figure 1 shows the depth direction of the metal component (Mg, Mn), resin component (C) and metal component (Cn) of the metal salt from the surface of the surface-treated zinc-coated steel sheet of the present invention using GDS.
- the following shows an example in which the signal intensity (abundance) of each element at each depth was measured by performing the analysis of the above.
- the sputtering time and the depth can be correlated based on the sputtering rate in terms of iron, and the layer mainly containing the reactant of the metal salt and the plating metal (hereinafter, also referred to as the “intermediate layer”) Call) can be determined.
- the time when the sputtering time is 0 second indicates the outermost surface of the surface-treated zinc-coated steel sheet of the present invention.
- the metal components (Mg, Mn) of the metal salt coexist with the plating metal (Zn) in the region.
- the carbon component (C) peak of the resin is located on the surface side of the peak of the metal component of the metal salt (hereinafter sometimes simply referred to as the metal salt component), but the metal salt component (Mg) , Mn).
- the layer (intermediate layer) mainly containing the reactant in the present invention is the largest peak among the peaks of the metal salt components in the measurement results of the signal intensity (abundance) of each element (for example, FIG. 1). Focusing on the peak of a metal having a peak, it is defined as the range from the position where the maximum value is present to the position where the intensity of the maximum peak is 1/10 in the plating layer direction.
- the present inventors have found that, when a surface treatment liquid having a resin and a metal salt is applied to a zinc-based plated steel sheet to form a surface treatment film, a reaction product of a metal salt and a plating metal among the adhered resins. It has been found that by increasing the ratio of the resin present in the layer (intermediate layer) having a slab, the workability, appearance after processing, and post-processing corrosion resistance of the steel sheet are improved. Therefore, the following method was used to evaluate the existing state of the resin and the intermediate layer as an element capable of improving these characteristics.
- Fig. 2 schematically shows a GDS analysis chart in the depth direction of the metal salt component, the resin component, and the plating metal salt component.
- the total amount of the resin can be quantified by calculating the total peak area of the carbon intensity (C) on the chart.
- the amount of resin contained in the intermediate layer is the amount of carbon on the intermediate layer side, that is, the amount of carbon on the plating layer side from the maximum peak of the metal salt component.
- the area on the chart (the shaded area in FIG. 2) Can be calculated from Therefore, the resin ratio of the intermediate layer can be expressed as a volume ratio of the entire resin.
- the effect of this ratio on the appearance after processing was investigated.When the ratio of the resin in the intermediate layer was 20 vol% or more, the appearance of the surface after processing did not occur even after processing, and the appearance after processing did not occur. Very good table It was found that a surface-treated galvanized steel sheet was obtained. Therefore, in the present invention, it is necessary that at least 20 vol% of the resin in the surface treatment film is contained in the intermediate layer.
- Figure 3 shows an example in which the ratio of the resin in the surface treatment film to the intermediate layer is less than 20 vol%. That is, in the intermediate layer having the same meaning as described above, the proportion occupied by the resin is less than 20 vol%, and the surface-treated coating having such a configuration is particularly inferior in appearance after processing and is disadvantageous in anti-locking described later. It becomes.
- the metal salt in the surface treatment film in FIG. 3 was a phosphate of Mn or Sr.
- the mass ratio of the resin to the metal salt in the surface treatment coating: resin Z metal salt to 0.01 to 0.5. That is, the mass ratio of the resin to the metal salt needs to be 1 to 50 mass%. If this mass ratio exceeds 50 mass%, the corrosion resistance tends to improve, but peeling occurs during press molding to generate black foreign matter, which tends to deteriorate the appearance after processing, and furthermore, has the problem of reduced conductivity. Also occurs. On the other hand, if the mass ratio is less than 1 mass%, the lubricity is remarkably reduced, black foreign matter is generated at the time of press molding, and the mold tends to seize. Therefore, the mass ratio of the resin to the metal salt in the surface treatment film is set to 1 to 50 mass%.
- the mass ratio of the resin to the metal salt in the coating can be measured by X-ray fluorescence.
- the resin examples include a polymer of a carboxyl group-containing monomer, a polymer of a carboxyl group-containing monomer and another polymerizable monomer, and a copolymer of a hydroxyl group-containing monomer and a hydroxyl group-containing monomer. It preferably contains at least one selected from the group consisting of a polymer, a hydroxyl group-containing monomer and a copolymer of a carboxyl group-containing monomer and a phosphoric acid-containing monomer, Further, those containing a water-dispersible resin are preferable.
- ethylenically unsaturated carboxy Acid is, for example, monocarboxylic acids such as acrylic acid, methacrylic acid and crotonic acid, and dicarboxylic acids such as itaconic acid, maleic acid and fumaric acid.
- monocarboxylic acids such as acrylic acid, methacrylic acid and crotonic acid
- dicarboxylic acids such as itaconic acid, maleic acid and fumaric acid.
- the derivatives include alkali metal salts, ammonium salts, and organic amine salts. Preferred are acrylic acid and methacrylic acid.
- hydroxyl group-containing monomer examples include hydroxymethyl (meth) acrylate, hydroxypropyl (meth) acrylate, 1-3-hydroxybutyl (meth) acrylate, and 1,2-bis (hydroxymethyl) ethyl acrylate (Meth) acrylic acid hydroxyesters, aryl alcohols, such as (meth) acrylic acid 1,2,3-dihydroxypropyl, (meth) acrylic acid 13-chloro-2-hydroxypropyl, etc.
- monomers having a reducing hydroxyl group such as hydroxyl group-containing acrylamides such as methylol acrylamide and p-toximemethylol (meth) acrylamide.
- the water-soluble copolymer containing a hydroxyl group-containing monomer and a carboxyl group-containing monomer may be any other polymerizable monomer as long as the properties of the organic resin layer expected in the present invention are maintained.
- the body may be further copolymerized. Suitable monomers include, for example, styrenes and (meth) acrylic esters such as methyl methacrylate.
- the phosphoric acid-containing monomer is a compound having a phosphoric acid residue and an addition polymerizable group typified by a compound having an ethylenically unsaturated group, and specifically, a compound of 12-hydroxyhexyl methacrylate.
- Phosphoric acid esters, methacrylic acid penta (propylene oxide) ester phosphoric acid esters and the like can be mentioned.
- the resin further contains a water-dispersible resin, it becomes possible to further improve the processability and the corrosion resistance after the process.
- water-dispersible resins are excellent in low pH (stable in acidic aqueous solutions (pH: 1 to 4) and can be uniformly dispersed). Are preferred.
- a low-pH treatment solution when forming the surface treatment film.
- a monomer examples include those obtained by copolymerizing an unsaturated monomer other than a monomer containing a carboxyl group or a hydroxyl group with a monomer containing a carboxyl group.
- Suitable monomers for the former include alkyl esters of methacrylic acid such as styrene, butyl methacrylate, and methyl methacrylate.
- the amount of the water-dispersible resin is preferably set to 1 to 25% by mass with respect to the metal salt. This amount is after film drying. If this amount exceeds 25 mass%, although there is an effect of improving corrosion resistance, black foreign matters are easily generated during press molding, and furthermore, problems such as lowering of conductivity and deterioration of film drying property occur. Is preferred. It is preferably at most 10 mass%. On the other hand, if this amount is less than l mass%, lubricity is remarkably reduced, and black foreign matter and mold seizure are likely to occur during press molding. Therefore, the amount is preferably 1 111338% or more. More preferably, it is at least 2 mass%.
- a lubricant may be contained in the resin layer in order to improve press formability.
- the amount of the lubricant is preferably 0.1 to 25% by mass relative to the metal salt. This amount is after the coating is dried. If this amount is 0.1 lmass% or more, lubricity is good and press formability is improved, so that it is preferably 0.1 lmass% or more. On the other hand, if the amount is 25 mass% or less, the appearance during press molding is excellent, so that it is preferably 25 mass ° / o or less. It is more preferably at most 10 mass%. Lubricants having low pH stability and a softening temperature of 100 ° C. or higher are preferred.
- the lubricant polyethylene wax and fluorine-based wax can be preferably used.
- the layer containing the reactant of the plating metal and the metal salt, that is, the intermediate layer has sufficient durability if it has continuity.
- a material having continuity is preferable because the corrosion resistance after press molding is improved.
- the surface treatment film according to the present invention is formed by adhering a surface treatment solution containing a metal salt and a resin to a plating surface of a steel sheet.
- a zinc-based plated steel sheet has a mass ratio of 1 to 50 raass to a metal salt and the metal salt. /.
- the resin is treated with a treating solution having a ⁇ of 1 to 4 and a free acidity in terms of 0.1N sodium hydroxide of 3 to 20, and the amount of the metal salt is 0.05 to
- the invention also provides a method for producing a surface-treated zinc-coated steel sheet to which a solid substance of 3.0 g / m 2 is adhered.
- the solid contains a reaction product of the metal salt and the plating metal, the resin, and a residue in the processing solution.
- the adhesion amount of this solid is defined as 0.05 to 3.0 OgZm 2 as the content of the metal salt.
- the surface treatment solution used here has a mass ratio of 1 to 50 mass e / in terms of a metal salt and the metal salt. It is important that the pH is 1 to 4 and the free acidity in terms of 0.1 N sodium hydroxide is 3 to 20.
- the reason why the mass ratio of the resin to the metal salt in the surface treatment liquid is set to 1 to 50 mass% is that if it exceeds 50 mass%, the corrosion resistance is improved, but black foreign substances are generated and crumbled during press molding. Since problems such as deterioration of conductivity and deterioration of film drying property also occur, the content is set to 50 mass% or less. On the other hand, if the amount is less than 1 mass ° / o, the lubricating properties are significantly reduced, and the black Since the seizure easily occurs, l mass% or more is set. It is preferably at least 3 mass%.
- the pH of the surface treatment liquid is less than 1, the zinc-based plating layer will dissolve, causing the plating layer to become thinner and the reactant of the plating metal and metal salt to re-dissolve, resulting in improved corrosion resistance. PH may not be obtained, so regulate pH to 1 or more.
- the pH of the processing solution is set to 1 to 4.
- the water-dispersible resin in the treatment liquid is preferably a resin excellent in low pH stability.
- neutralization may be performed using a hydroxide such as NaOH or K0H, an amine, or the like.
- ⁇ free acidity in terms of 0.1 N sodium hydroxide '' referred to in the present invention means that three drops of bromophenol blue are added dropwise to 10 ml of the treated solution, and the color change from yellow to blue is required.
- the amount (ml) of 1N aqueous sodium hydroxide solution expressed as an anonymous number.
- the free acidity of the treatment solution should be 3 to 20 in terms of 0.1N sodium hydroxide. It is preferably from 5 to: 15.
- This surface treatment liquid is selected from the group consisting of Al, Mn, Mg, V and Zn. At least one selected from the group consisting of phosphates, nitrates, carbonates, sulfates, acetates and hydroxides of at least one metal, a water-dispersible resin, and more preferably a lubricant It contains.
- This treatment liquid is obtained by adding the metal salt, a resin, preferably a water-dispersible resin, and more preferably a lubricant to water to form an aqueous solution.
- the metal phosphate may be any salt as long as it is a salt formed by a reaction between the metal and a phosphorus-containing acid that can become phosphoric acid in the treatment step.
- phosphorus-containing acids include, in addition to phosphoric acid, polyphosphoric acid, hypophosphorous acid, pyrophosphoric acid, tripolyphosphoric acid, hexametaphosphoric acid, primary phosphoric acid, secondary phosphoric acid, and tertiary phosphoric acid. And the like.
- the metal salt in the processing solution reacts with the metal in the plating layer when the processing solution comes into contact with the plating layer, and forms a strong bond to form a thin layer (ie, an intermediate layer) with high corrosion resistance.
- the reason that such a strong bond is formed is that the metal salt dissociates in preference to other components (resin or the like) in the processing solution, and the dissociated ions are ionically bonded to the metal ions in the plating layer. Presumed.
- the concentration of the metal salt in the treatment solution can be appropriately adjusted within a range in which the metal salt dissolves.
- the case where at least one metal inorganic acid salt selected from the group consisting of Mg, Mn and V is used in combination is preferable. Further, it is more preferable to use an inorganic acid salt of Zn in combination.
- the water-dispersible resin and the lubricant in the treatment liquid are dispersed in the treatment liquid, and are similarly dispersed and contained in the intermediate layer formed by the contact between the treatment liquid and the plating layer.
- uniform lubrication can be ensured at any position in the depth direction of the intermediate layer.
- lubricity reaches a sufficient level by the inclusion of a lubricant.
- the resin in the treatment solution (and (Preferably a lubricant) is required to be 1 to 50 mass% in mass ratio to the metal salt.
- the requirements in these treatment solutions are the same as the requirements in the surface treatment film described above. Therefore, if the requirements in these treatment solutions are not satisfied, the above-described object of the present invention is achieved. Because it will not be achieved.
- the resin to be mixed into the treatment liquid is a polymer of the above-described carboxyl group-containing monomer, a copolymer of a carbonyl group-containing monomer and another polymerizable monomer, or a hydroxyl-containing monomer and a carboxyl group-containing monomer. It contains at least one selected from the group consisting of a copolymer with a group-containing monomer, a hydroxyl group-containing monomer, and a copolymer of a carboxyl group-containing monomer and a phosphoric acid-containing monomer. It is preferable that there is. Further, it is preferable to include a water-dispersible resin and / or a lubricant.
- the concentration of these resins can be appropriately set within a concentration range in which the stability of each resin is ensured.
- the water-dispersible resin When a water-dispersible resin is contained, the water-dispersible resin having a glass transition temperature of 20 or higher results in a film having excellent blocking resistance after drying. On the other hand, when the temperature is 120 ° C. or lower, the coating easily follows the deformation of the steel sheet during processing, and it is difficult for the rupture of the skin to occur, so that the corrosion resistance after the processing is improved. Therefore, the water-dispersible resin preferably has a glass transition temperature of 20 to 120 ° C.
- the resin when the particle size of the resin is at least 0.1 ⁇ , press formability is improved. On the other hand, when the thickness is less than 2.0 mm, the continuity of the intermediate layer is easily maintained, and all of the corrosion resistance, press formability, and post-processing corrosion resistance are improved. Therefore, the resin preferably has a particle diameter of 0.1 m or more and 2.0 Aim or less.
- the surface treatment liquid used in the present invention may contain a surfactant from the viewpoints of foam prevention and treatment liquid stability when applied to the surface to be treated (the surface of a zinc-based plated steel sheet). Any surfactant may be used as long as it is stable in an environment of ⁇ 1 to 4, and nonionic surfactants may be mentioned. Also gives other performance For this purpose, the treatment liquid may contain wax and other various additives used in ordinary surface treatment.
- the method of applying the surface treatment liquid to the surface to be treated includes a coating step of bringing the treatment liquid into contact with the surface to be treated, and a drying step of heating and drying the contacted portion to 50 to L00 ° C.
- a coating method such as roll coating, spray coating, brush coating, curtain flow, or the like can be preferably used.
- the application amount and the adhesion amount are set so that the thickness of the intermediate layer is achieved.
- the thickness of the intermediate layer can be 0.02 to 3 ⁇ as described above.
- the heating temperature (steel plate temperature) in the drying step is 50 ° C or more, the moisture in the film is less likely to remain, so that the corrosion resistance is improved.
- the temperature is lower than 100 ° C, the orthoacidity of phosphoric acid is suppressed, so that the free acidity of the chemical solution is easily maintained, and the corrosion resistance is also improved.
- the heating means a hot air furnace, a dryer, a high-frequency heating furnace, an infrared heating furnace, or the like can be used.
- an aqueous surface treatment solution containing a metal salt and resins A to E or a water-dispersible resin F to I is spray-coated on zinc-coated steel sheets a to f shown below. Painted with Ringer's drawing. Thereafter, the steel sheet was heated to 60 ° C in 5 seconds to form a surface-treated coating. Table 1 also shows the conditions of the processing solution and the properties of the obtained coating. (Zinc-based plated steel sheets a-: f)
- Electrolytic zinc one nickel-plated steel plate (thickness l mm, Zn- Ni20g / m 2 , Ni; 12mass%)
- the ratio of the resins A to D is the polymerization ratio of the copolymer.
- Resin ⁇ phosphoric acid-modified acrylyl resin
- Resin F Epoxy-modified urethane resin (molecular weight: 250,000)
- Resin G Urethane resin emulsion
- Resin I polyethylene resin emulsion
- the mass ratio (mass%) of the resin in the surface-treated coating to the gold salt was analyzed by X-ray fluorescence.
- the volume ratio (vol%) present in the intermediate layer of the resin in the surface treatment film was determined by the above-mentioned method (see FIG. 2) using GDS.
- the thickness of the intermediate layer was also measured using GDS.
- the homogeneity of the surface treatment film was evaluated by the following method.
- ⁇ 0.5 ⁇ or more, less than ⁇ . ⁇
- test piece was sheared to a size of 70 to 150 mm, the end face was sealed, and a salt spray test JISZ-2371 was performed. The time required for whitening to occur on 5% of the surface area of each test piece was evaluated according to the following evaluation criteria. The results are shown in Table 2.
- Aperture die curvature 3 thighs R
- an aqueous surface treatment liquid containing a metal salt, a water-dispersible resin J-M, and a lubricant N-O is spray-coated on the zinc-based plated steel sheets a-f used in Example 1 as shown in Table 3. Then, the coating surface was flattened with a Ringer's diaphragm. Next, the steel sheet was heated to 60 ° C in 5 seconds to form a surface-treated coating, and a test piece was prepared. Table 3 also shows the conditions of the processing solution and the properties of the obtained film.
- Resin J Urethane resin emulsion (Tg 80 ° C, dispersed particle size 0.2 to 0.4 / m) where Tg is the glass transition temperature (the same applies hereinafter).
- Resin K Acrylic resin emulsion (Tg70 ° C, dispersed particle size 0.3 to 0.4 / ⁇ )
- Resin L Polyethylene resin emulsion (Tg80 ° C, dispersed particle size 0:! ⁇ 0.2m)
- Resin M Acrylic resin emulsion (. In T g 30, the dispersed particle size 0. l ⁇ 0 2 // m) (lubricant)
- Lubricant N polyethylene wax (softening temperature 110 ° C)
- Lubricant O Fluorine wax (softening temperature 160 ° C)
- this invention example is equal to or higher than the evaluation in each evaluation, and is equal to or higher than the chromate material.
- the workability was 27 kN or less, while the forming load of the chromate material was 32 kN, and the appearance was also evaluated. From the above results, it can be seen that they have excellent corrosion resistance, conductivity, workability, and post-process corrosion resistance.
- a chromium-free surface-treated zinc-based coated steel sheet having both excellent flat plate corrosion resistance, post-processing corrosion resistance, conductivity, and workability comparable to a general-purpose chromated zinc-coated steel sheet is obtained.
- the step of coating the surface treatment liquid and the use of the steel sheet do not require any special wastewater treatment. Therefore, without special consideration for environmental pollution, it can be used in a wide range of fields instead of conventional chromate treated steel sheets used in the fields of automobiles and home appliances.
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Abstract
Description
Claims
Priority Applications (3)
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EP03738527A EP1518943A1 (en) | 2002-06-28 | 2003-06-27 | Surface-treated zinc based metal plated steel plate and method for production thereof |
KR1020047018086A KR100675198B1 (ko) | 2002-06-28 | 2003-06-27 | 표면처리아연계도금강판 및 그 제조방법 |
US10/515,944 US20050221108A1 (en) | 2002-06-28 | 2003-06-27 | Surface-treated zinc based metal plated steel plate and method for production thereof |
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JP2002189140 | 2002-06-28 | ||
JP2002-189140 | 2002-06-28 | ||
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JP2003018460 | 2003-01-28 |
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PCT/JP2003/008152 WO2004003253A1 (ja) | 2002-06-28 | 2003-06-27 | 表面処理亜鉛系めっき鋼板およびその製造方法 |
Country Status (6)
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US (1) | US20050221108A1 (ja) |
EP (1) | EP1518943A1 (ja) |
KR (1) | KR100675198B1 (ja) |
CN (1) | CN1665956A (ja) |
TW (1) | TWI258517B (ja) |
WO (1) | WO2004003253A1 (ja) |
Families Citing this family (4)
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US7761167B2 (en) | 2004-06-10 | 2010-07-20 | Medtronic Urinary Solutions, Inc. | Systems and methods for clinician control of stimulation systems |
WO2009101707A1 (ja) * | 2008-02-15 | 2009-08-20 | Nippon Steel Corporation | 薄膜一次防錆被覆層を有する表面導電性に優れた亜鉛系めっき鋼板とその製造方法 |
CN105908226B (zh) | 2011-06-07 | 2018-07-17 | 杰富意钢铁株式会社 | 热压用钢板 |
US20220372626A1 (en) * | 2019-09-26 | 2022-11-24 | Nof Metal Coatings Asia Pacific Co., Ltd. | Rust-proofing treatment method, and rust-proofing-treated article |
Citations (1)
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JP2001172771A (ja) * | 1999-10-08 | 2001-06-26 | Kawasaki Steel Corp | 表面処理亜鉛系めっき鋼板 |
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KR100567175B1 (ko) * | 1999-10-08 | 2006-04-03 | 제이에프이 스틸 가부시키가이샤 | 표면처리 아연계 도금강판 |
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2003
- 2003-06-27 CN CN038153653A patent/CN1665956A/zh active Pending
- 2003-06-27 KR KR1020047018086A patent/KR100675198B1/ko not_active IP Right Cessation
- 2003-06-27 WO PCT/JP2003/008152 patent/WO2004003253A1/ja active Application Filing
- 2003-06-27 EP EP03738527A patent/EP1518943A1/en not_active Withdrawn
- 2003-06-27 TW TW092117698A patent/TWI258517B/zh not_active IP Right Cessation
- 2003-06-27 US US10/515,944 patent/US20050221108A1/en not_active Abandoned
Patent Citations (1)
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JP2001172771A (ja) * | 1999-10-08 | 2001-06-26 | Kawasaki Steel Corp | 表面処理亜鉛系めっき鋼板 |
Also Published As
Publication number | Publication date |
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US20050221108A1 (en) | 2005-10-06 |
CN1665956A (zh) | 2005-09-07 |
KR20050000420A (ko) | 2005-01-03 |
KR100675198B1 (ko) | 2007-01-26 |
TWI258517B (en) | 2006-07-21 |
EP1518943A1 (en) | 2005-03-30 |
TW200403356A (en) | 2004-03-01 |
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