WO2011105101A1 - 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 - Google Patents
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 Download PDFInfo
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- WO2011105101A1 WO2011105101A1 PCT/JP2011/001098 JP2011001098W WO2011105101A1 WO 2011105101 A1 WO2011105101 A1 WO 2011105101A1 JP 2011001098 W JP2011001098 W JP 2011001098W WO 2011105101 A1 WO2011105101 A1 WO 2011105101A1
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- WIPO (PCT)
- Prior art keywords
- compound
- steel sheet
- surface treatment
- silane coupling
- solid content
- Prior art date
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- 238000000034 method Methods 0.000 title description 29
- 230000008569 process Effects 0.000 title description 6
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- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 51
- 125000002091 cationic group Chemical group 0.000 claims abstract description 50
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000002960 lipid emulsion Substances 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- MODMKKOKHKJFHJ-UHFFFAOYSA-N magnesium;dioxido(dioxo)molybdenum Chemical compound [Mg+2].[O-][Mo]([O-])(=O)=O MODMKKOKHKJFHJ-UHFFFAOYSA-N 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000000250 methylamino group Chemical group [H]N(*)C([H])([H])[H] 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- JESXATFQYMPTNL-UHFFFAOYSA-N mono-hydroxyphenyl-ethylene Natural products OC1=CC=CC=C1C=C JESXATFQYMPTNL-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- OGUCKKLSDGRKSH-UHFFFAOYSA-N oxalic acid oxovanadium Chemical compound [V].[O].C(C(=O)O)(=O)O OGUCKKLSDGRKSH-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004209 oxidized polyethylene wax Substances 0.000 description 1
- 235000013873 oxidized polyethylene wax Nutrition 0.000 description 1
- QLOKAVKWGPPUCM-UHFFFAOYSA-N oxovanadium;dihydrochloride Chemical compound Cl.Cl.[V]=O QLOKAVKWGPPUCM-UHFFFAOYSA-N 0.000 description 1
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000005011 phenolic resin Substances 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
- 229940085991 phosphate ion Drugs 0.000 description 1
- DHRLEVQXOMLTIM-UHFFFAOYSA-N phosphoric acid;trioxomolybdenum Chemical compound O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.OP(O)(O)=O DHRLEVQXOMLTIM-UHFFFAOYSA-N 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 235000007686 potassium Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011684 sodium molybdate Substances 0.000 description 1
- 235000015393 sodium molybdate Nutrition 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 125000002813 thiocarbonyl group Chemical group *C(*)=S 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- 229910000348 titanium sulfate Inorganic materials 0.000 description 1
- FOZHTJJTSSSURD-UHFFFAOYSA-J titanium(4+);dicarbonate Chemical compound [Ti+4].[O-]C([O-])=O.[O-]C([O-])=O FOZHTJJTSSSURD-UHFFFAOYSA-J 0.000 description 1
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 description 1
- RIAJLMJRHLGNMZ-UHFFFAOYSA-N triazanium;trioxomolybdenum;phosphate Chemical compound [NH4+].[NH4+].[NH4+].O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.[O-]P([O-])([O-])=O RIAJLMJRHLGNMZ-UHFFFAOYSA-N 0.000 description 1
- UDUKMRHNZZLJRB-UHFFFAOYSA-N triethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OCC)(OCC)OCC)CCC2OC21 UDUKMRHNZZLJRB-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
- 229940041260 vanadyl sulfate Drugs 0.000 description 1
- 229910000352 vanadyl sulfate Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- XAEWLETZEZXLHR-UHFFFAOYSA-N zinc;dioxido(dioxo)molybdenum Chemical compound [Zn+2].[O-][Mo]([O-])(=O)=O XAEWLETZEZXLHR-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B05D7/14—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 to metal, e.g. car bodies
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
- C08K3/11—Compounds containing metals of Groups 4 to 10 or of Groups 14 to 16 of the Periodic Table
-
- 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
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C09D161/12—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols with polyhydric phenols
-
- 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
- C09D165/00—Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Coating compositions based on derivatives of such polymers
- C09D165/02—Polyphenylenes
-
- 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
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
- C23C22/42—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also phosphates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
- C23C22/44—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also fluorides or complex fluorides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2150/00—Compositions for coatings
- C08G2150/90—Compositions for anticorrosive coatings
-
- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
-
- 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
- Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
- Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
Definitions
- the present invention relates to a zinc-based plated steel sheet that is most suitable for use in automobiles, home appliances, and building materials, and particularly to an environment-adaptive zinc-based plated steel sheet that does not contain chromium or the like at the time of manufacture and during manufacture, and a method for manufacturing the same. .
- the present invention also relates to a surface treatment solution useful for improving the blackening resistance and the like of galvanized steel sheets.
- Steel sheets for home appliances, steel sheets for building materials, and steel sheets for automobiles have conventionally been provided with chromic acid, dichromic acid or salts thereof for the purpose of improving corrosion resistance (white rust resistance, red rust resistance) on the surface of galvanized steel sheets.
- Steel plates subjected to chromate treatment with a treatment liquid as a main component are widely used. This chromate treatment is an economical treatment method that has excellent corrosion resistance and can be performed relatively easily.
- the chromate treatment uses hexavalent chromium which is a pollution control substance, but this hexavalent chromium is treated in a closed system in the treatment process, completely reduced and recovered and not released into nature. Since the elution of chromium from the chromate film can be made almost zero by the sealing action by the organic film, the environment and the human body are not substantially contaminated by hexavalent chromium. However, due to recent global environmental problems, there is an active movement to voluntarily reduce the use of hexavalent chromium itself. In addition, in order to prevent the environment from being polluted when the shredder dust of discarded products is dumped, there has already been a movement to reduce or reduce hexavalent chromium as much as possible in the product.
- chromium-free techniques In order to prevent the occurrence of white rust on galvanized steel sheets due to the above-mentioned global environmental problems, a number of so-called chromium-free techniques have been proposed that do not rely on chromate treatment. For example, there is a technique for generating a surface-treated film on a zinc-based plated steel sheet using an inorganic compound, an organic compound, an organic polymer material, or a combination of these.
- inorganic compound an organic compound, an organic polymer material, or a combination of these.
- the first problem is the improvement of the corrosion resistance in the processed part of the surface-treated galvanized steel sheet.
- Surface-treated galvanized steel sheets are processed (cut, bent, part welded, painted) into products, but when the surface-treated galvanized steel sheets are bent, plating extends on the front side of the bent parts. .
- the surface treatment film also extends along with the bending process, the surface treatment film is damaged and the surface of the zinc-based plating is exposed, and deterioration of the corrosion resistance in the exposed portion becomes a problem.
- it is very difficult to obtain corrosion resistance in the processed portion because damage to the film and the plating occurs continuously rather than local damage such as extrusion.
- the second problem is to ensure the solvent resistance of the surface treatment film.
- the dirt on the surface of the film and the symbols written with magic may be wiped off with a solvent.
- the surface treatment film is peeled off by the solvent or the phenomenon of whitish discoloration (whitening) is frequently observed. It was done.
- the corrosion resistance of the galvanized steel sheet cannot be sufficiently obtained, and when the surface treatment film is whitened, the appearance quality is deteriorated.
- the third problem is to ensure the paintability of the surface treatment film.
- the surface-treated zinc-based plated steel sheet processed as described above may be painted after the surface is once cleaned (alkaline degreasing) with an alkali cleaner or the like to clean the surface. For this reason, top coatability after alkaline degreasing may be required, but there is no known literature that examines such properties.
- the fourth problem is to achieve both the corrosion resistance of the surface treatment film and the storage stability of the surface treatment liquid.
- a so-called coating type type in which a surface treatment film is formed by coating and drying on a zinc-based plated steel sheet is most often employed.
- the surface treatment film is required to have predetermined water resistance. This is because it is difficult to ensure corrosion resistance (barrier effect) with a surface-treated film that is easily redissolved in water.
- the galvanized steel sheet has a drawback that a blackening phenomenon in which the plating surface is discolored easily occurs when exposed to a high humidity / temperature environment for a long period of time.
- the blackening phenomenon becomes remarkable particularly when a plating layer containing an element such as Mg or Al is provided. Therefore, it is also required that the surface treatment film on the galvanized steel sheet is excellent in blackening resistance.
- Patent Document 1 discloses a method in which an aqueous solution containing water-dispersible silica, an alkyd resin, and a trialkoxysilane compound is applied to a metal surface and dried to form a coating film.
- Patent Documents 2 and 3 disclose a surface treatment method for imparting corrosion resistance to a metal material using a water-soluble resin composed of a hydroxypyrone compound derivative, and an aqueous solution or water dispersibility of a hydroxystyrene compound.
- a method for imparting corrosion resistance to a metal material using a polymer is disclosed.
- Patent Document 4 discloses a technique using a surface treatment agent in which a water-based resin, colloidal silica, and ammonium vanadate are blended at a specific ratio.
- Patent Document 5 discloses a technique of a surface treatment film containing an organic resin and a thiocarbonyl group-containing compound, but it cannot be said that the corrosion resistance after alkaline degreasing is sufficient.
- Patent Document 6 discloses a technique for treating a metal plate surface with a treatment liquid containing an organic resin, a silane coupling agent, and a solid lubricant in a lithium silicate aqueous solution. Since it is easy to form, the corrosion resistance of a processed part such as a bending process becomes insufficient. Moreover, since an alkali metal is included, it is inferior to the secondary adhesiveness of coating.
- Patent Document 7 a resin film is formed using an aqueous resin liquid containing a carboxyl group-containing polyurethane resin, an ethylene-unsaturated carboxylic acid copolymer aqueous dispersion, silica particles, and a silane coupling agent in a specific ratio.
- Patent Document 8 discloses a steel sheet having a film containing a urethane resin, a lubricant, an inorganic colloidal compound, and a silane coupling agent in a specific ratio, but is designed on the assumption of electrodeposition coating. Although it is excellent in electrodeposition paintability, the corrosion resistance of the processed part is not sufficiently obtained.
- Patent Document 9 discloses a surface treatment liquid in which a silane coupling agent and a urethane resin are mixed and adjusted to a pH of 2.5 to 4.5. However, the corrosion resistance after alkaline degreasing is poor, and the solvent resistance is also low. Not enough.
- Patent Document 10 discloses a technique for forming a film using a treatment liquid containing an aqueous dispersion resin, silica particles, and organic titanate at a specific ratio, but the corrosion resistance of the processed portion is not sufficient.
- Patent Documents 11 and 12 disclose specific aqueous epoxy resin dispersions, urethane resin dispersions, silane coupling agents, phosphoric acid and / or phosphoric acid compounds, 1 to 5 fluorine atoms in one molecule, or active hydrogen.
- Patent Document 13 discloses a technique for forming a film using a treatment liquid containing a specific resin compound, a vanadium compound, and a metal compound containing a specific metal, but the alkali resistance is not always sufficient. Corrosion resistance after alkaline degreasing cannot be obtained, and problems such as yellowing during heating are not solved.
- Patent Document 14 a film is formed using a specific resin compound, a cationic urethane resin having a cationic functional group, a silane coupling agent having a reactive functional group, a Ti compound, and a treatment agent containing an acid compound in a specific ratio.
- a forming technique is disclosed. According to this technology, a film excellent in corrosion resistance and fingerprint resistance can be obtained, but corrosion resistance after alkaline degreasing, corrosion resistance of processed parts, and solvent resistance have not been studied, and these characteristics have been sufficiently obtained. Absent.
- Patent Document 15 discloses a technique related to a surface treatment agent containing at least one water-based resin selected from cationic and nonionic properties, a specific resin compound, a metal compound containing a specific metal, and water. Again, the corrosion resistance and solvent resistance of the processed parts have not been studied, and these characteristics have not been sufficiently obtained.
- Patent Document 16 discloses a technique using a surface treatment agent containing a specific proportion of a compound containing cationic urethane, a cationic phenol-based polycondensate, titanium, and a specific metal. Sexuality has not been studied, and these properties were not sufficient.
- any of the conventional surface treatment agents including a silane coupling agent tends to be inferior in storage stability. For this reason, the desired properties are often not obtained even if there is no problem in the appearance of the surface treatment agent after storage, and the above-mentioned problems are not studied at all in the prior art.
- Japanese Patent Laid-Open No. 53-121034 Japanese Patent Publication No.57-44751 JP-A-1-177380 Japanese Patent Laid-Open No. 11-310757 JP 2000-248369 A JP-A-11-58599 JP 2006-43913 A Japanese Patent No. 3573307 JP 2001-59184 A JP 2003-155451 A JP 2006-82365 A JP 2004-238716 A JP 2001-181860 A Japanese Patent No. 3883831 Japanese Patent No. 4078044 JP 2006-152436 A
- the present invention solves the above-mentioned problems of the prior art, can form a film with excellent corrosion resistance on the surface of the metal material, further corrosion resistance of the bent portion, solvent resistance, paintability after alkaline degreasing,
- An object is to provide a chromium-free surface treatment solution for a zinc-based plated steel sheet, which has blackening resistance and one solution and is excellent in storage stability, together with a zinc-based plated steel sheet using the surface treatment solution and a method for producing the same.
- a specific resin compound, a urethane resin emulsion having a specific cationic property, a silane coupling agent having a specific functional group, and a specific organic Ti chelate compound It is excellent in corrosion resistance, solvent resistance, and paintability by treating the surface of the galvanized steel sheet with a surface treatment liquid containing a specific ratio of bismuth and a tetravalent vanadyl compound and molybdate compound. Needless to say, it was newly found that a film excellent in blackening resistance can be formed, and that the film characteristics are not deteriorated even after storage.
- the present invention has been completed based on such findings, and the gist of the present invention is as follows.
- the solid content (B) having a bisphenol skeleton represented by the following general formula
- the solid content (C s ) of the silane coupling agent (C) is 0.6 to 0.85 in mass ratio [(C s ) / ⁇ (A s ) + (B s ) + (C s ) ⁇ ].
- the solid content (C s ) of the silane coupling agent (C) with respect to the titanium equivalent amount (D Ti ) of the organic titanium chelate compound (D) is a mass ratio ⁇ (C s ) / (D Ti ) ⁇ .
- the vanadium equivalent amount (E V ) of the tetravalent vanadyl compound (E) with respect to the titanium equivalent amount (D Ti ) of the organic titanium chelate compound (D) is the mass ratio ⁇ (E V ) / (D Ti ) ⁇ 0.3 to 0.5 (5)
- the molybdenum equivalent amount (F Mo ) of the molybdate compound (F) is 0.003 to 0.03 in mass ratio [(F Mo ) / ⁇ (A s ) + (B s ) + (C s ) ⁇ ].
- Y 1 and Y 2 bonded to the benzene ring are each independently hydrogen or a Z group represented by the following general formula (II) or (III), The average number of substitutions of Z groups per unit is 0.2 to 1.0.
- N represents an integer of 2 to 50.
- R 1 , R 2 , R 3 , R 4 and R 5 are each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a hydroxyalkyl group having 1 to 10 carbon atoms.
- a ⁇ represents a hydroxide ion or an acid ion.
- the surface treatment liquid further contains a wax (W),
- the solid content of the wax (W) (W s) is a resin compound (A) and the total solid content weight of the cationic urethane resin emulsion (B) weight ratio ⁇ (A s) + (B s) ⁇ [(W 2.
- the surface treatment liquid according to 1 or 2 is applied to the surface of a zinc-based plated steel sheet in a range where the adhesion amount after drying is 0.2 to 1.8 g / m 2 per side, and then the ultimate plate temperature: A method for producing a galvanized steel sheet, characterized by drying at 50 to 180 ° C.
- the film has corrosion resistance comparable to that of a chromate film, and has excellent corrosion resistance, solvent resistance, paintability after alkaline degreasing, and excellent blackening resistance in a bent portion introduced during the manufacturing process.
- This makes it possible to form a chromium-free galvanized steel sheet that is more practical than conventional products.
- the surface treatment liquid for chrome-free zinc-based plated steel sheets of the present invention is excellent in storage stability, it is extremely useful for industrial implementation.
- the steel sheet used as the base of the surface-treated steel sheet of the present invention is a zinc-based plated steel sheet for home appliances, building materials, and automobile parts based on cold-rolled steel sheets.
- galvanized steel sheets electrogalvanized steel sheets, hot dip galvanized steel sheets, zinc-aluminum alloy plated steel sheets, zinc-iron alloy plated steel sheets, zinc-magnesium plated steel sheets, zinc-aluminum-magnesium alloy plated steel sheets, etc. may be used. it can.
- the zinc-based plated steel sheet is added with a small amount of Ni or Co to the plating, or using an acid or alkaline aqueous solution containing Ni, Co, Fe, What deposited these metals on the surface of a zinc system plating steel plate may be used.
- an acid or alkaline aqueous solution containing Ni, Co, Fe, What deposited these metals on the surface of a zinc system plating steel plate may be used.
- a higher degree of black resistance Denaturation can be obtained stably.
- the surface treatment liquid of the present invention comprises (A) a resin compound represented by the following general formula (I), (B) a cationic urethane resin emulsion, (C) an active hydrogen-containing amino group, an epoxy group, a mercapto group, and One or more silane coupling agents having at least one reactive functional group selected from methacryloxy groups, (D) an organic titanium chelate compound, (E) a tetravalent vanadyl compound, and (F) a molybdate compound.
- the solid content (C s ) of C) is 0.6 to 0.85 by mass ratio [(C s ) / ⁇ (A s ) + (B s ) + (C s ) ⁇ ], and the organic titanium chelate
- the solid content (C s ) of the silane coupling agent (C) with respect to the titanium equivalent (D Ti ) of the compound (D) is 50 to 70 in mass ratio ⁇ (C s ) / (D Ti ) ⁇ .
- the vanadium equivalent amount (E V ) of the tetravalent vanadyl compound (E) with respect to the titanium equivalent amount (D Ti ) of the organic titanium chelate compound (D) is 0 in mass ratio ((E V ) / (D Ti )).
- Y 1 and Y 2 bonded to the benzene ring are each independently hydrogen or a Z group represented by the following general formula (II) or (III):
- the average number of substitutions of Z groups per ring is 0.2 to 1.0.
- N represents an integer of 2 to 50.
- R 1 , R 2 , R 3 , R 4 and R 5 are each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a hydroxyalkyl group having 1 to 10 carbon atoms. Represents. When the number of carbon atoms of the alkyl group or hydroxyalkyl group exceeds 10, the resin compound (A) cannot be sufficiently water-solubilized and becomes unstable in the treatment liquid, and cannot be applied.
- R 1 , R 2 , R 3 , R 4 and R 5 include methyl, ethyl, propyl, butyl, hydroxyethyl, 2-hydroxypropyl, hydroxyisobutyl and the like.
- a ⁇ represents a hydroxide ion or an acid ion. Specific examples of the acid ion include acetate ion, phosphate ion, formate ion and the like.
- the average value of the number of substitution of Z groups is a numerical value obtained by dividing the total number of introduced Z groups by the total number of benzene rings (that is, 2n).
- the resin compound (A) has a cationic functional group of a secondary amine, a tertiary amine, and a quaternary ammonium salt. It becomes possible to dissolve more stably in the acidic (pH 4 to 5) surface treatment solution targeted by the present invention.
- the average degree of polymerization n is 2 to 50. If n is less than 2, the corrosion resistance imparting effect is insufficient, while if it exceeds 50, the stability in the treatment liquid is lowered due to a decrease in water solubility, thickening, etc., and the storage stability is insufficient.
- the resin compound (A) represented by the general formula (I) is a bisphenol-formalin condensate, and its synthesis method is not limited.
- formalin and amine act on bisphenol A in the presence of an alkali catalyst. Can be obtained.
- the cationic urethane resin emulsion (B) in the surface treatment composition in the present invention is at least one selected from a primary amine, a secondary amine and a tertiary amine, and a quaternary ammonium salt as a cationic functional group.
- a cationic functional group there are no particular limitations on the polyol, isocyanate component, and polymerization method, which are monomer components.
- the cationic functional group include an amino group, a methylamino group, an ethylamino group, a dimethylamino group, a diethylamino group, a trimethylamino group, a triethylamino group, and the like. If it is a tertiary amine and a quaternary ammonium salt, there will be no limitation in particular.
- the silane coupling agent (C) in the surface treatment liquid in the present invention has at least one reactive functional group selected from an active hydrogen-containing amino group, an epoxy group, a mercapto group, and a methacryloxy group.
- the above silane coupling agent is not particularly limited. In particular, trialkoxysilane having three alkoxy groups is preferred. Specific examples include N- (aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-glycid.
- Xylpropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 2- (3,4 epoxycyclohexyl) ethyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-mercapto Propyltotimethoxysilane can be used.
- Examples of the organic titanium chelate compound (D) in the surface treatment liquid in the present invention include titanium acetylacetonate, titanium octylene glycolate, titanium tetraacetylacetonate, titanium tetraacetylacetonate, and titanium ethylacetoacetate.
- Inorganic salts such as titanium nitrate, titanium sulfate, titanium acetate, titanium phosphate, and titanium carbonate are not preferable because they cannot be stably dissolved in the treatment liquid of the present invention or do not exhibit the effect of improving corrosion resistance.
- Titanium hydrofluoric acid has the effect of being added to the organic titanium chelate compound, but when titanium hydrofluoric acid is used in combination, the fluorine content is the resin compound (A), cationic urethane resin
- the emulsion (B) and the silane coupling agent (C) are blended so that the mass ratio with respect to the total solid content ⁇ (A s ) + (B s ) + (C s ) ⁇ is 0.8% by mass or less. This is because, if it exceeds 0.8% by mass, the corrosion resistance of the processed part may be lowered.
- the organic titanium chelate compound When the organic titanium chelate compound is dissolved in water and used, since titanium is dissolved as a chelate complex, a highly polar water-soluble solvent or peroxide that affects this complex is used as the treatment liquid of the present invention. It is preferable not to add it inside.
- the tetravalent vanadyl compound (E) used with the surface treatment liquid in this invention Specifically, vanadyl sulfate, vanadyl dichloride, vanadyl phosphate, vanadyl oxalate, vanadyl acetylacetate And the like. Since the pentavalent vanadium compound has high water solubility, the elution from the film is also high, and the effect of improving corrosion resistance is small. Moreover, as a tetravalent vanadium compound used with the surface treatment liquid in this invention, the vanadyl compound used as VO2 + (vanadyl) ion has the highest effect of improving corrosion resistance, and is most preferable.
- the present invention is characterized in that the molybdic acid compound (F) is added to the surface treatment solution as a component for improving blackening resistance.
- the type of molybdate compound (F) is not particularly limited, but specific examples include molybdic acid, ammonium molybdate, sodium molybdate, potassium molybdate, magnesium molybdate, zinc molybdate, and the like.
- phosphomolybdic acid, ammonium phosphomolybdate, sodium phosphomolybdate, and the like it is preferable to use one or more selected from these.
- the solid content (B s ) of the cationic urethane resin emulsion (B) is from 0.1 to 0.1 in mass ratio [(B s ) / ⁇ (A s ) + (B s ) + (C s ) ⁇ ]. It is necessary to be 0.3.
- the mass ratio is less than 0.1, the proportion of the urethane resin is too small, and the corrosion resistance, heat resistance, and storage stability of the surface treatment liquid of the bent portion are deteriorated.
- the mass ratio exceeds 0.3, the solvent resistance is poor. More preferably, it is 0.12 to 0.28.
- the total amount of solids ⁇ (A s ) + (B s ) + ((resin compound (A), cationic urethane resin emulsion (B) and silane coupling agent (C)) C s) solid content of the silane coupling agent (C) with respect ⁇ (C s) is the mass ratio [(C s) / ⁇ ( a s) + (B s) + (C s) ⁇ ] 0.6 It must be ⁇ 0.85. When the mass ratio is less than 0.6, the solvent resistance is inferior, and when it exceeds 0.85, the corrosion resistance of the processed part and the storage stability of the surface treatment liquid are lowered. More preferably, it is 0.65 to 0.80.
- the solid content (C s ) of the silane coupling agent (C) with respect to the titanium equivalent amount (D Ti ) of the organotitanium chelate compound (D) is a mass ratio ⁇ (C s ) / ( D Ti ) ⁇ is set to 50 to 70.
- the mass ratio is less than 50, the corrosion resistance and storage stability of the processed part are inferior, and when it exceeds 70, the elution property of the film increases, and the paintability after alkaline degreasing decreases. More preferably, it is 55 to 65.
- the mass (C s ) of the solid content of the silane coupling agent (C) is determined by hydrolysis of alkoxysilane (R—Si (—OR 1 ) 3 ) and silanol.
- the vanadium equivalent amount (E V ) of the tetravalent vanadyl compound (E) with respect to the titanium equivalent amount (D Ti ) of the organotitanium chelate compound (D) is the mass ratio (E V / D Ti ) is set to 0.3 to 0.5.
- the mass ratio is less than 0.3, the corrosion resistance is inferior, and when it exceeds 0.5, the paintability after alkaline degreasing is deteriorated. More preferably, it is 0.35 to 0.48.
- the molybdenum equivalent amount (F Mo ) of the molybdate compound (F) is 0.003 to 0 in mass ratio [(F Mo ) / ⁇ (A s ) + (B s ) + (C s ) ⁇ ]. .03.
- the mass ratio is less than 0.003
- the blackening resistance is inferior, and when it exceeds 0.03, not only the storage stability of the surface treatment liquid cannot be obtained, but also the treatment liquid may be gelled. In order to obtain a higher degree of blackening resistance, 0.006 or more is preferable.
- the pH of the surface treatment solution of the present invention is 4-5. If the pH is less than 4, elution of zinc from the plating layer of the zinc-based plated steel sheet to be surface-treated increases, and the corrosion resistance is lowered. On the other hand, when the pH exceeds 5, the stability of the surface treatment liquid cannot be obtained.
- the acidic component used when adjusting the pH to 4 to 5 is preferably phosphoric acid, acetic acid, formic acid, hydrofluoric acid, fluoride, etc., and strong acids such as sulfuric acid and nitric acid are not preferred.
- the addition amount thereof may be 8% by mass or less based on the total solid content of the resin compound (A), the cationic urethane resin emulsion (B), and the silane coupling agent (C).
- Phosphoric acid improves the corrosion resistance, but if it exceeds 8% by mass, there is concern about deterioration of storage stability, and 6% by mass or less is more preferable.
- hydrofluoric acid or fluoride the fluorine content is 0 with respect to the total solid content of the resin compound (A), the cationic urethane resin emulsion (B) and the silane coupling agent (C). It is preferable to mix
- the alkaline component used when adjusting the pH to 4 to 5 is preferably ammonia water or an amine having a boiling point of 100 ° C. or lower.
- a strong alkali such as NaOH or KOH is used, a gel-like substance is formed by pH shock or storage stability is lowered.
- wax (W) can be contained in the surface treatment liquid for the purpose of ensuring the lubricity of the film.
- the solid content (W s ) of the wax (W) is based on the total solid content ⁇ (A s ) + (B s ) ⁇ of the resin compound (A) and the cationic urethane resin emulsion (B). It is preferable to blend such that the mass ratio [(W s ) / ⁇ (A s ) + (B s ) ⁇ ] is 0.2 to 0.4.
- the content is 0.2 or more, the desired lubricity can be obtained.
- the content is 0.4 or less, the lubricity can be ensured, there is no economical disadvantage, and the corrosion resistance can be lowered. It is preferable because it is not present. Further, 0.3 to 0.4 is more preferable.
- the wax (W) used in the present invention is preferably at least one selected from those having a melting point of 70 to 120 ° C.
- Specific examples include polyethylene wax, oxidized polyethylene wax, polypropylene wax, Stylin wax etc. are mentioned.
- the melting point is 70 ° C. or higher, lubricity is obtained, and when the melting point is 120 ° C. or less, lubricity is obtained without being too hard.
- the wax (W) is preferably an emulsion that is stably dispersed in water with an emulsifier, and preferably has a particle size of 0.08 to 0.3 ⁇ m.
- the particle size is 0.08 ⁇ m or more, an effect of lubricity is obtained, and since the amount of emulsifier used does not increase, alkali resistance and paintability do not deteriorate.
- a particle size of 0.3 ⁇ m or less is preferable because it does not cause floating separation in the treatment liquid due to the low specific gravity of the wax (W) and is excellent in storage stability.
- Water (G) used in the present invention is used for resin compound (A), cationic urethane resin emulsion (B), silane coupling agent (C), organic titanium chelate compound (D), and pH adjustment.
- Those having little influence on the acid component and alkali component to be used are preferred.
- hardness components such as Mg, Ca and Si contained as impurities in water reduce the solubility and dispersibility of the resin compound (A) and the cationic urethane resin emulsion (B) of the present invention. It can be a factor that generates things.
- Na or Cl contained as impurities in water may reduce corrosion resistance or paint adhesion when remaining in the film.
- water (G) to be used preferably has few impurities, and for example, its electrical conductivity is preferably less than 100 ⁇ S / cm. More preferably, it is 50 ⁇ S / cm or less, and further preferably 10 ⁇ S / cm or less.
- the solid concentration of the surface treatment liquid in the present invention is preferably 4 to 20% by mass as the solid concentration when dried at 110 ° C. for 2 hours. This is because, when the solid content concentration is in the range of 4 to 20% by mass, it becomes easy to secure the adhesion amount of the surface treatment film described later and the storage stability of the surface treatment liquid is excellent.
- An antifoaming agent or a wettability improving agent may be added to the surface treatment liquid of the present invention as necessary.
- the type of antifoaming agent is not particularly limited, and for example, a silicone-based or fatty acid-based emulsion type can be used.
- the wettability improver lowers the surface tension of the surface treatment liquid, improves the wettability with respect to the zinc-based plated steel sheet, and improves the appearance uniformity.
- Examples of the wettability improver include, but are not limited to, water-soluble solvents such as ethanol, T-butanol, and butyl cellosolve.
- a wettability improver containing acetylene is suitable because it also has a defoaming effect.
- nitrates such as nickel nitrate and ammonium nitrate may be added to the surface treatment solution of the present invention.
- nitric acid gives pH shock, but nitrate does not give pH shock.
- the manufacturing method of the plated steel plate using the said surface treatment liquid and the plated steel plate obtained by it are demonstrated.
- the surface treatment liquid is applied to the plated steel sheet, dried at an ultimate plate temperature of 50 to 180 ° C. It is necessary to form a surface treatment film having an adhesion amount of 0.2 to 1.8 g / m 2 .
- the adhesion amount per one side of the surface treatment film is less than 0.2 g / m 2 , sufficient corrosion resistance cannot be obtained, and if it exceeds 1.8 g / m 2 , the effect of the adhesion amount is saturated, economically.
- the adhesion amount per side is 0.2 to 1.8 g / m 2 . 0.3 to 1.6 g / m 2 is preferable, and 0.4 to 1.4 g / m 2 is more preferable.
- any method such as a roll coater (3-roll method, 2-roll method, etc.) squeeze coater, die coater, etc. may be used.
- the coating amount can be adjusted, the appearance can be made uniform, and the film thickness can be made uniform by an air knife method or a roll drawing method after the coating treatment with a squeeze coater or the like, or the immersion treatment and the spray treatment.
- the surface treatment liquid of the present invention is coated (applied) on the plated steel sheet, it is preferably heated and dried without being washed with water.
- a drying means a dryer, a hot air furnace, a high frequency induction heating furnace, an infrared furnace, or the like can be used. Drying is performed in the range of 50 to 180 ° C. at the ultimate temperature of the plated steel sheet itself. If the ultimate plate temperature is lower than 50 ° C., a large amount of moisture remains in the film, resulting in insufficient corrosion resistance. In addition, when the ultimate plate temperature exceeds 180 ° C., not only is it uneconomical, but the film becomes hard and brittle, and the corrosion resistance of the processed part is lowered.
- the plated steel sheet of the present invention having a surface-treated film formed by the above method can be further obtained by coating the surface with a resin film to obtain a higher degree of corrosion resistance.
- the surface treatment liquid of the present invention contains a resin compound (A), a cationic urethane resin emulsion (B), and a silane coupling agent (C) as main components, and the skeleton of the film is formed by these main components.
- the surface treatment liquid containing the resin compound (A) having a cationic functional group (the general formula (II) or (III) described above) to be weakly acidic, the surface treatment liquid is stabilized. And storage stability is ensured. Moreover, since the resin compound (A) becomes insoluble in alkali by imparting cationicity, it becomes a film resistant to alkali. Furthermore, by selecting bisphenol as the phenol skeleton of the resin compound (A), it becomes difficult to dissolve in a polar solvent (providing solvent resistance), and adhesion and corrosion resistance are improved.
- the resin compound (A) tends to be yellowish by heating (decrease in heat-resistant yellowing) and easily forms a hard film. Therefore, in the present invention, by blending the cationic urethane resin emulsion (B), the hardness of the phenol resin is reduced and the corrosion resistance of the processed part is ensured.
- the silane coupling agent (C) is blended for the purpose of ensuring the solvent resistance (with respect to the polar solvent) and the yellowing resistance.
- the terminal alkoxy group is hydrolyzed to generate an active silanol group (Si—OH), which contributes to an improvement in adhesion to the material (zinc-based plating layer) and the top coating film.
- silane coupling agent (C) is dehydrated and condensed to form a siloxane bond (Si—O—Si), which is continuously polymerized (polysiloxaneization: —Si—O—Si—O—). Si-).
- Si—O—Si siloxane bond
- Si- siloxane bond
- the surface treatment liquid of the present invention contains an organic titanium chelate compound (D) as an essential component in addition to the above main components.
- the organic titanium chelate compound (D) is presumed to function as a catalyst for promoting polysiloxane formation when the surface treatment liquid is dried to form a film.
- a predetermined amount of the organic titanium chelate compound (D) determined according to the amount of the silane coupling agent (C) is required.
- the amount is small, the desired effect cannot be obtained, and when the amount is excessive, the polysiloxane is excessively increased to form a hard and brittle film, and the corrosion resistance of the processed portion is lowered.
- it is ideal that the polysiloxane formation with the organotitanium chelate compound (D) is promoted at the time of film formation, but the polysiloxane formation is promoted even during storage of the surface treatment solution.
- the storage stability inhibition of thickening and gelation
- a tetravalent vanadyl compound (E) is also an essential component.
- the tetravalent vanadyl compound (E) is presumed to act as a corrosion inhibitor (for example, zinc passivation).
- a corrosion inhibitor for example, zinc passivation
- vanadyl [VO 2+ ] ions with a single oxygen are difficult to elute even in a wet environment, and in order to exert the inhibitor effect while remaining in the film, the plated steel sheet is subjected to strong processing such as bending, It is presumed that the corrosion resistance after ductile damage on the plated surface itself and the corrosion resistance after alkaline degreasing are improved. Note that the inventors presume that such an effect is achieved by a synergistic effect with Ti similarly present as a cation, on the premise that the coating skeleton having a cationic functional group is appropriate.
- the molybdate compound (F) is also an essential component in the surface treatment liquid of the present invention.
- excellent blackening resistance can be obtained by adding the molybdate compound (F).
- the blackening of zinc-based plating occurs regardless of the type of plating (electricity, melting), especially in hot dip galvanizing, in order to improve the corrosion resistance or to improve the adhesion between the zinc plating and the material (iron plate). Al is added, and these concentrate on the plating interface of galvanization and the surface layer of plating to promote blackening and become blacker. Further, it is known that blackening resistance decreases when surface treatment for improving white rust resistance of zinc-based plating is performed.
- Resin compound (A) shown in Table 1 (Table 1a and Table 1b), cationic urethane resin emulsion (B) shown in Table 2, silane coupling agent (C) shown in Table 3, titanium compound shown in Table 4 (D ), A vanadium compound (E) shown in Table 5, a molybdate compound (F) shown in Table 6, and a wax (W) emulsion in Table 7 were appropriately mixed to prepare a surface treatment solution.
- the plated steel plate shown in Table 8 was used as the processing original plate.
- the surface treatment liquid of Example 1 was blended so as to have the composition shown in Table 9, and after adjusting to the pH shown in Table 9 with acetic acid and ammonia, the solid content concentration when dried at 110 ° C.
- the surface treatment liquid shown in Tables 9 to 11 is applied on one side by a roll coater, and each temperature shown in Table 12 is adjusted without washing with water.
- a plated steel sheet having a surface treatment film was produced by heating and drying to reach the ultimate sheet temperature.
- the adhesion amount per one side of the surface treatment film was adjusted by application conditions (roll rolling force, rotational speed, etc.).
- the amount of adhesion is shown in Table 12. The amount of adhesion was converted based on the quantitative determination of Si in the blended silane coupling agent (C) using a fluorescent X-ray analyzer.
- Rust generation area ratio in the bent part is less than 5%
- Rust generation area ratio in the bent part is 5% or more and less than 10%
- Occurrence area ratio is 10% or more and less than 40%
- ⁇ : Rust generation area ratio of bent part is 40% or more and less than 80%
- Rust generation area ratio of bent part is 80% or more
- the Eriksen extrusion conditions were JIS-Z-2247-2006, and the punch diameter was 20 mm, the die diameter was 27 mm, and the drawing width was 27 mm.
- Comparative Example 1 which is outside the scope of the present invention, does not have any bending portion corrosion resistance because the content of the cationic urethane resin emulsion (B) is less than the scope of the present invention. Later, the corrosion resistance was reduced.
- Comparative Example 2 No. 7
- Comparative Example 3 No. 8
- Comparative Example 4 No. 9
- Comparative Example 5 In Comparative Example 5 (No. 10), Comparative Example 7 (No. 12), and Comparative Example 8 (No. 13) in which the tetravalent vanadyl compound (E) is not blended, the corrosion resistance of the bent portion is still not obtained. The quality after storage was also degraded.
- Comparative Example 6 No. 11
- Comparative Example 9 since a pentavalent vanadyl compound was used, the corrosion resistance after the bent portion and the alkaline degreasing was not obtained, and the paintability after the alkaline degreasing was further deteriorated.
- Comparative Example 9 No.
- Comparative Example 10 (No. 20) is inferior in solvent resistance because the solid content of the silane coupling agent (C) is less than the range of the present invention, while Comparative Example 11 (No. 23) Since the amount exceeded the range of the present invention, the corrosion resistance of the bent portion was not obtained, and the liquid after storage did not exhibit the corrosion resistance.
- Comparative Example 12 (No. 24), since the solid content of the silane coupling agent (C) with respect to titanium of the organic titanium chelate compound (D) exceeds the range of the present invention, the corrosion resistance and paintability after alkaline degreasing are poor.
- Comparative Example 13 (No. 27), the solid content was less than the range of the present invention, so that the corrosion resistance of the bent portion was not obtained, and the liquid after storage was inferior in corrosion resistance.
- Comparative Example 14 does not exhibit corrosion resistance because the amount of vanadium of the tetravalent vanadyl compound (E) with respect to titanium of the organic titanium chelate compound (D) is less than the range of the present invention.
- Example 15 (No. 31) was inferior in corrosion resistance and paintability after alkaline degreasing because the above amount exceeded the range of the present invention.
- Comparative Examples 25 to 27 (No. 59, 60, 63) that were not adjusted to an appropriate pH did not provide corrosion resistance and were inferior in storage stability.
- Comparative Example 28 (No. 64) having a high pH, the surface treatment solution was gelled and could not be tested.
- Comparative Example 29 In Comparative Example 29 (No. 65), the adhesion amount of the film is less than the range of the present invention, so that sufficient corrosion resistance cannot be obtained. Further, in Comparative Example 30 (No. 70), the coating amount was lower because the coating amount exceeded the range of the present invention. In Comparative Example 31 (No. 71), since the drying temperature is less than the range of the present invention, sufficient corrosion resistance cannot be obtained after alkaline degreasing. Further, in Comparative Example 32 (No. 74), the drying temperature exceeded the range of the present invention, so that the corrosion resistance and paintability of the bent portion were lowered.
- Comparative Example 33 No. 76
- Comparative Example 34 No. 77
- Comparative Example 38 No. 85
- Comparative Example 39 No. 86
- Comparative Example 35 No. 78
- Comparative Example 40 No. 87
- Undissolved material was formed at the stage.
- Comparative Example 36 No. 79
- Comparative Example 41 No. 88
- the average value of the number of substitution of Z groups exceeds the range of the present invention.
- Comparative Example 37 (No. 80) and Comparative Example 42 No. 89
- the average degree of polymerization of the Z group exceeded the range of the present invention, so the surface treatment solution after storage gelled.
- Comparative Example 43 In Comparative Example 43 (No. 92), the urethane resin emulsion is nonionic, and in Comparative Example 44 (No. 93), the urethane resin emulsion is anionic. Aggregated. In Comparative Example 45 (No. 95), the corrosion resistance after alkaline degreasing was not obtained because the silane coupling agent was outside the scope of the present invention.
- a surface-treated plated steel sheet that is excellent in corrosion resistance (particularly in a bent portion), heat resistance, paintability, solvent resistance, and also blackening resistance without using chromate treatment.
- a treatment liquid that can obtain excellent quality even after storage with one liquid also has the effect of reducing costs and reducing waste.
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Abstract
Description
また、本発明は、亜鉛系めっき鋼板の耐黒変性等を向上させるのに有用な表面処理液に関するものである。
すなわち、特許文献1には、水分散性シリカとアルキド樹脂とトリアルコキシシラン化合物とを含む水溶液を金属表面に塗布し、乾燥して、被覆皮膜を形成させる方法が開示されている。
特許文献6には、ケイ酸リチウム水溶液に有機樹脂、シランカップリング剤、固体潤滑剤を含有させた処理液で金属板表面を処理する技術が開示されているが、無機成分が硬い高分子を形成し易いため、折り曲げ加工などの加工部の耐食性が不十分となる。また、アルカリ金属を含むため、塗装の二次密着性に劣る。
特許文献7には、カルボキシル基含有ポリウレタン樹脂とエチレン-不飽和カルボン酸共重合体水分散液とシリカ粒子とシランカップリング剤とを特定比率で含む樹脂水性液を使用して樹脂皮膜を形成する技術が開示されているが、耐溶剤性や加工部耐食性は不十分である。
特許文献8には、ウレタン系樹脂、潤滑剤、無機コロイド化合物とシランカップリング剤を特定の割合で含む皮膜を有する鋼板が開示されているが、電着塗装を前提として設計されたものであり、電着塗装性には優れるものの、加工部耐食性などは十分に得られていない。
特許文献10には、水性分散樹脂とシリカ粒子と有機チタネートを特定の割合で含む処理液を使用して皮膜を形成する技術が開示されているが、加工部の耐食性は十分ではない。
特許文献11および12には、特定の水性のエポキシ樹脂分散体とウレタン樹脂分散体とシランカップリング剤とリン酸および/またはリン酸化合物と1分子中にフッ素を1~5個、または活性水素を有するヒドラジン誘導体を含有する処理液を使用して皮膜を形成する技術がそれぞれ開示されているが、耐アルカリ性が不十分であるためアルカリ脱脂後の耐食性や塗装性の確保が困難であり、また加工部耐食性や耐溶剤性も十分ではない。
特許文献14には、特定樹脂化合物とカチオン性官能基を有するカチオンウレタン樹脂と反応性官能基を有するシランカップリング剤とTi化合物と酸化合物を特定の割合で含む処理剤を使用して皮膜を形成する技術が開示されている。この技術によると、耐食性や耐指紋性に優れた皮膜が得られるものの、アルカリ脱脂後の耐食性、加工部の耐食性、耐溶剤性に関しては検討されておらず、これらの特性は十分に得られていない。
特許文献16には、カチオン性ウレタンとカチオン性フェノール系重縮合物とチタンと特定の金属を含む化合物を特定の割合で含む表面処理剤を用いる技術が開示されているが、耐溶剤性や塗装性に関しては検討されておらず、これらの特性は十分なものでなかった。
第1級アミン、第2級アミン及び第3級アミン並びに4級アンモニウム塩から選ばれる少なくとも1種のカチオン性官能基を有するカチオン性ウレタン樹脂エマルション(B)と、
活性水素含有アミノ基、エポキシ基、メルカプト基およびメタクリロキシ基から選ばれた少なくとも1種の反応性官能基を有する1種以上のシランカップリング剤(C)と、
有機チタンキレート化合物(D)と、
4価のバナジル化合物(E)と、
モリブデン酸化合物(F)と、
水(G)と、
を、下記(1)~(5)の条件を満足する範囲で含有し、かつpHが4~5であることを特徴とする亜鉛系めっき鋼板用の表面処理液。
記
(1)上記樹脂化合物(A)、上記カチオン性ウレタン樹脂エマルション(B)および上記シランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対するカチオン性ウレタンエマルション(B)の固形分量(Bs)が、質量比[(Bs)/{(As)+(Bs)+(Cs)}]で0.1~0.3
(2)上記樹脂化合物(A)、上記カチオン性ウレタン樹脂エマルション(B)および上記シランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対するシランカップリング剤(C)の固形分量(Cs)が、質量比[(Cs)/{(As)+(Bs)+(Cs)}]で0.6~0.85
(3)上記有機チタンキレート化合物(D)のチタン換算量(DTi)に対する上記シランカップリング剤(C)の固形分量(Cs)が、質量比{(Cs)/(DTi)}で50~70
(4)上記有機チタンキレート化合物(D)のチタン換算量(DTi)に対する上記4価のバナジル化合物(E)のバナジウム換算量(EV)が、質量比{(EV)/(DTi)}で0.3~0.5
(5)上記樹脂化合物(A)、上記カチオン性ウレタン樹脂エマルション(B)および上記シランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対する上記モリブデン酸化合物(F)のモリブデン換算量(FMo)が、質量比[(FMo)/{(As)+(Bs)+(Cs)}]で0.003~0.03
該ワックス(W)の固形分量(Ws)が、樹脂化合物(A)およびカチオン性ウレタン樹脂エマルション(B)の固形分合計量{(As)+(Bs)}に対する質量比[(Ws)/{(As)+(Bs)}]で0.2~0.4の範囲にあることを特徴とする前記1に記載の亜鉛系めっき鋼板用の表面処理液。
本発明の表面処理鋼板のベースとなる鋼板は、冷延鋼板をベースとした家電、建材、自動車部品用の亜鉛系めっき鋼板である。亜鉛系めっき鋼板としては、電気亜鉛めっき鋼板、溶融亜鉛めっき鋼板、亜鉛-アルミニウム合金めっき鋼板、亜鉛-鉄合金めっき鋼板、亜鉛-マグネシウムめっき鋼板、亜鉛-アルミニウム-マグネシウム合金めっき鋼板等を用いることができる。
特に、耐黒変性が問題となり易い亜鉛-アルミニウム合金めっき鋼板や亜鉛-アルミニウム-マグネシウム合金めっき鋼板においては、めっき皮膜中にNiを、0.01~0.1質量%程度含有させることにより、より高度な耐黒変性を安定して得ることができる。
本発明の表面処理液は、(A)下記一般式(I)で表される樹脂化合物と、(B)カチオン性ウレタン樹脂エマルションと、(C)活性水素含有アミノ基、エポキシ基、メルカプト基およびメタクリロキシ基から選ばれた少なくとも1種の反応性官能基を有する1種以上のシランカップリング剤と、(D)有機チタンキレート化合物と(E)4価のバナジル化合物と(F)モリブデン酸化合物と(G)水とを含み、樹脂化合物(A)、カチオン性ウレタン樹脂エマルション(B)およびシランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対する、カチオン性ウレタン樹脂エマルション(B)の固形分量(Bs)が、質量比[(Bs)/{(As)+(Bs)+(Cs)}]で0.1~0.3であり、樹脂化合物(A)、カチオン性ウレタン樹脂エマルション(B)およびシランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対する、シランカップリング剤(C)の固形分量(Cs)が、質量比[(Cs)/{(As)+(Bs)+(Cs)}]で0.6~0.85であり、有機チタンキレート化合物(D)のチタン換算量(DTi)に対する、シランカップリング剤(C)の固形分量(Cs)が、質量比{(Cs)/(DTi)}で50~70であり、有機チタンキレート化合物(D)のチタン換算量(DTi)に対する、4価のバナジル化合物(E)のバナジウム換算量(EV)が、質量比((EV)/(DTi))で0.3~0.5であり、樹脂化合物(A)、カチオン性ウレタン樹脂エマルション(B)およびシランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対する、モリブデン酸化合物(F)のモリブデン換算量(FMo)が、質量比[(FMo)/{(As)+(Bs)+(Cs)}]で0.003~0.03であり、且つpHが4~5であることを特徴とする。
記
A-は水酸イオンまたは酸のイオンを表す。酸のイオンの具体例としては、酢酸イオン、リン酸イオン、蟻酸イオンなどを挙げることができる。
また、水に不純物として含まれるNaやClなどは、皮膜中に残存した場合に耐食性を低下させたり、塗装密着性を低下させることがある。そのため、使用する水(G)は不純物が少ないものが好ましく、例えばその電気伝導度が100μS/cm未満であることが好ましい。より好ましくは50μS/cm以下、さらに好ましくは10μS/cm以下である。
なお、本発明における表面処理液の固形分濃度は、110℃で2時間乾燥した時の固形分濃度として4~20質量%とすることが好ましい。というのは、固形分濃度を4~20質量%の範囲とすると、後述する表面処理膜の付着量の確保が容易となり、また表面処理液の貯蔵安定性にも優れているからである。
本発明の表面処理液を用いてめっき鋼板に表面処理皮膜を形成する場合においては、表面処理液をめっき鋼板に塗布し、到達板温:50~180℃で乾燥し、該鋼板表面に片面当たりの付着量で0.2~1.8g/m2の表面処理皮膜を形成させることが必要である。
この時、表面処理皮膜の片面当たりの付着量が、0.2g/m2未満では十分な耐食性が得られず、1.8g/m2を超えると付着量の効果は飽和し、経済的に不利であるばかりか塗装性を低下させる。従って、片面当たりの付着量は0.2~1.8g/m2とする。0.3~1.6g/m2が好ましく、0.4~1.4g/m2がより好ましい。
なお、本発明の表面処理液により形成される表面処理皮膜は、めっき鋼板の片面、両面のいずれに実施してもよい。
本発明の表面処理液は、樹脂化合物(A)、カチオン性ウレタン樹脂エマルション(B)、シランカップリング剤(C)が主成分であり、これらの主成分により皮膜の骨格が形成される。
例えば、実施例1の表面処理液は表9の組成になるように配合し、酢酸とアンモニアで表9に示すpHに調整後、110℃で2時間乾燥した時の固形分濃度が10質量%となるように脱イオン水で調製した。他の表面処理液についても全てpHを酢酸とアンモニアで調整し、固形分濃度を10質量%に調製した。なお、上記の脱イオン水としては、電気伝導度が10μS/cmのイオン交換水を使用した。
なお、付着量は配合したシランカップリング剤(C)のSiを蛍光X線分析装置により定量し、それを基に換算した。
各サンプルについて塩水噴霧試験(JIS-Z-2371-2000)を行い、120時間経過後の白錆発生面積率で評価した。評価基準は以下の通りである。
◎ :白錆発生面積率0%
○+:白錆発生面積率5%未満
○ :白錆発生面積率5%以上、10%未満
○-:白錆発生面積率10%以上、20%未満
△ :白錆発生面積率20%以上、40%未満
× :白錆発生面積率40%以上
各サンプルを、直径:2mmの棒(ステンレス製)に挟み込むようにして180°曲げて、万力を用いて絞め込んだ。この曲げたサンプルについて塩水噴霧試験(JIS-Z-2371-2000)を行い、72時間経過後の曲げ加工部外(表)側の白錆発生状態を評価した。評価基準は次の通りである。
◎ :曲げ加工部に錆発生なし
○+:曲げ加工部の錆発生面積率が5%未満
○ :曲げ加工部の錆発生面積率が5%以上、10%未満
○-:曲げ加工部の錆発生面積率が10%以上、40%未満
△ :曲げ加工部の錆発生面積率が40%以上、80%未満
× :曲げ加工部の錆発生面積率が80%以上
アルカリ脱脂剤CL-N364S(日本パーカライジング(株)製)を20g/Lの濃度で純水に溶解し、60℃に加温した。このアルカリ溶液に各サンプルを2分間浸漬し、取り出して水洗して乾燥した。各サンプルについて塩水噴霧試験(JIS-Z-2371-2000)を行い、72時間経過後の白錆発生面積率で評価した。評価基準は上記(1)に示した通りである。
各サンプルを温度:80℃、相対湿度:95%雰囲気に制御された恒温恒湿機に24時間静置した際の明度(L値)変化(ΔL=試験後のL値-試験前のL値)で算出した。評価基準は以下のとおりである。L値は,日本電色工業(株)製のSR2000を使用し,SCEモード(正反射光除去)で測定を行った。
◎:-6≦△L
○:-10≦△L<-6
△:-14≦△L<-10
×:ΔL<-14
各サンプルを赤外線イメージ炉にて30秒で板温:500℃に加熱し、30秒間保持した後、室温まで自然放冷した時の表面外観を目視観察した。その評価基準は以下の通りである。
◎ :変色なし
○ :極僅かに褐色味あり
△ :淡い褐色に変色
× :褐色に変色
各サンプルについてメラミンアルキッド系塗料であるデリコン(登録商標)#700(大日本塗料(株)製)を塗装し、130℃で30分間焼付け、膜厚:30μmの塗膜を形成した後、沸騰水に2時間浸漬し、直ちに、碁盤目(10×10個、1mm間隔)の鋼素地まで達するカットを入れた。さらにエリクセン押し出し機にてカット部が外(表)側となる様に5mm押し出し加工を施し、接着テープによる貼着・剥離を行い、塗膜の剥離面積を測定した。評価の基準は以下の通りである。なお、エリクセン押し出し条件は、JIS-Z-2247-2006に準拠し、ポンチ径:20mm、ダイス径:27mm、絞り幅:27mmとした。
◎ :剥離なし
○+:剥離面積3%未満
○ :剥離面積3%以上、10%未満
○-:剥離面積10%以上、20%未満
△ :剥離面積20%以上、50%未満
× :剥離面積50%以上
上記(3)と同様のアルカリ脱脂を行い、その各サンプルに上記(6)と同様の塗装性試験を行った。評価基準も上記(6)に同じである。
各サンプルの表面にメタノールを染み込ませたガーゼを4.90N(500gf)の荷重をかけて押し付け、その荷重のまま10回往復するように擦った。その擦った痕を目視にて評価した。評価基準は以下の通りである。
◎ :痕跡なし。
○+:上から見ると痕跡が見えないが、斜めから見ると僅かに見える。
○ :上から見ると痕跡が見ないが、斜めから見ると明らかに見える。
○-:上から見て僅かに痕跡が見える。
△ :上から見て痕跡が明らかに見える。
× :皮膜が剥離している。
表9~11に示した各表面処理液を40℃の恒温槽に30日間保管した。取り出して、各表面処理液の外観を目視によって調べ、評価した。評価基準は次の通りである。さらに、上記条件で保管した表面処理液を使用して製造した表面処理皮膜を有するめっき鋼板について上記した(1)~(3)と同様の各試験を行った。
◎:変化なし
○:極微量の沈殿が見られる
△:微量の沈殿が見られる、もしくはやや粘度が高くなった
×:多量の沈殿が見られる、もしくはゲル化した
各サンプルより直径:100mmの円板状の試験片を切り出し、ポンチ径:50mm、ダイス径51.91mm、しわ押さえ力:1トンの条件でカップ状に成型した。成型品の絞り加工を受けた面(カップの側面外側)の外観を目視によって調べ、傷つき程度および黒化程度を評価した。評価基準は次の通りである。
◎ :全面に渡って殆ど変化なく、外観が均一
○+:極僅かに黒化が発生したが、外観は均一
○ :傷つきおよび黒化が少し発生し、外観が明らかに不均一
○-:局部的に傷つきおよび黒化が発生し、外観が明らかに不均一
△ : コーナー部を中心に傷つきおよび黒化が激しく発生
× :成型できずに割れた
比較例31(No.71)では乾燥温度が本発明の範囲に満たないため、アルカリ脱脂後に十分な耐食性が得られない。また、比較例32(No.74)では乾燥温度が本発明の範囲を超えるため、曲げ加工部の耐食性や塗装性が低下した。
Claims (4)
- 下記一般式(I)で表されるビスフェノール骨格を有する樹脂化合物(A)と、
第1級アミン、第2級アミン及び第3級アミン並びに4級アンモニウム塩から選ばれる少なくとも1種のカチオン性官能基を有するカチオン性ウレタン樹脂エマルション(B)と、
活性水素含有アミノ基、エポキシ基、メルカプト基およびメタクリロキシ基から選ばれた少なくとも1種の反応性官能基を有する1種以上のシランカップリング剤(C)と、
有機チタンキレート化合物(D)と、
4価のバナジル化合物(E)と、
モリブデン酸化合物(F)と、
水(G)と、
を、下記(1)~(5)の条件を満足する範囲で含有し、かつpHが4~5であることを特徴とする亜鉛系めっき鋼板用の表面処理液。
記
(1)上記樹脂化合物(A)、上記カチオン性ウレタン樹脂エマルション(B)および上記シランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対するカチオン性ウレタンエマルション(B)の固形分量(Bs)が、質量比[(Bs)/{(As)+(Bs)+(Cs)}]で0.1~0.3
(2)上記樹脂化合物(A)、上記カチオン性ウレタン樹脂エマルション(B)および上記シランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対するシランカップリング剤(C)の固形分量(Cs)が、質量比[(Cs)/{(As)+(Bs)+(Cs)}]で0.6~0.85
(3)上記有機チタンキレート化合物(D)のチタン換算量(DTi)に対する上記シランカップリング剤(C)の固形分量(Cs)が、質量比{(Cs)/(DTi)}で50~70
(4)上記有機チタンキレート化合物(D)のチタン換算量(DTi)に対する上記4価のバナジル化合物(E)のバナジウム換算量(EV)が、質量比{(EV)/(DTi)}で0.3~0.5
(5)上記樹脂化合物(A)、上記カチオン性ウレタン樹脂エマルション(B)および上記シランカップリング剤(C)の固形分合計量{(As)+(Bs)+(Cs)}に対する上記モリブデン酸化合物(F)のモリブデン換算量(FMo)が、質量比[(FMo)/{(As)+(Bs)+(Cs)}]で0.003~0.03
- 前記表面処理液が、さらにワックス(W)を含み、
該ワックス(W)の固形分量(Ws)が、樹脂化合物(A)およびカチオン性ウレタン樹脂エマルション(B)の固形分合計量{(As)+(Bs)}に対する質量比[(Ws)/{(As)+(Bs)}]で0.2~0.4の範囲にあることを特徴とする請求項1に記載の亜鉛系めっき鋼板用の表面処理液。 - 請求項1または2に記載の表面処理液を、亜鉛系めっき鋼板の表面に、乾燥後の付着量が片面当たり0.2~1.8g/m2となる範囲で塗布し、ついで到達板温:50~180℃で乾燥することを特徴とする亜鉛系めっき鋼板の製造方法。
- 表面に、片面当たりの付着量が0.2~1.8g/m2の表面処理皮膜を有する亜鉛系めっき鋼板であって、該表面処理皮膜は、請求項1または2に記載の表面処理液を、鋼板表面に塗布し、到達板温:50~180℃で乾燥して得たものであることを特徴とする亜鉛系めっき鋼板。
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US20130084453A1 (en) | 2013-04-04 |
MY162580A (en) | 2017-06-30 |
TWI435950B (zh) | 2014-05-01 |
KR101463528B1 (ko) | 2014-11-19 |
EP2540865A4 (en) | 2017-01-18 |
SG183507A1 (en) | 2012-09-27 |
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EP2540865B1 (en) | 2017-11-01 |
JP5499773B2 (ja) | 2014-05-21 |
CN102884225A (zh) | 2013-01-16 |
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