JP2020537045A - 金属板処理方法及びこの方法で処理された金属板 - Google Patents
金属板処理方法及びこの方法で処理された金属板 Download PDFInfo
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- JP2020537045A JP2020537045A JP2020520546A JP2020520546A JP2020537045A JP 2020537045 A JP2020537045 A JP 2020537045A JP 2020520546 A JP2020520546 A JP 2020520546A JP 2020520546 A JP2020520546 A JP 2020520546A JP 2020537045 A JP2020537045 A JP 2020537045A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 63
- 239000002184 metal Substances 0.000 title claims abstract description 63
- 238000003672 processing method Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims description 14
- 238000000576 coating method Methods 0.000 claims abstract description 47
- 239000011248 coating agent Substances 0.000 claims abstract description 46
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 42
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 42
- 239000011701 zinc Substances 0.000 claims abstract description 35
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 15
- VCPQWWKLNIMKND-UHFFFAOYSA-L zinc hydroxy sulfate Chemical compound [Zn++].OOS([O-])(=O)=O.OOS([O-])(=O)=O VCPQWWKLNIMKND-UHFFFAOYSA-L 0.000 claims abstract description 15
- RNZCSKGULNFAMC-UHFFFAOYSA-L zinc;hydrogen sulfate;hydroxide Chemical compound O.[Zn+2].[O-]S([O-])(=O)=O RNZCSKGULNFAMC-UHFFFAOYSA-L 0.000 claims abstract description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011593 sulfur Substances 0.000 claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 10
- KSLUMEQTEAUMJZ-UHFFFAOYSA-L zinc;sulfate;tetrahydrate Chemical compound O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O KSLUMEQTEAUMJZ-UHFFFAOYSA-L 0.000 claims abstract description 8
- 229940118149 zinc sulfate monohydrate Drugs 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims description 23
- RZLVQBNCHSJZPX-UHFFFAOYSA-L zinc sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O RZLVQBNCHSJZPX-UHFFFAOYSA-L 0.000 claims description 19
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 18
- 229910052749 magnesium Inorganic materials 0.000 claims description 18
- 239000011777 magnesium Substances 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- 238000005246 galvanizing Methods 0.000 claims description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 abstract description 50
- 235000009529 zinc sulphate Nutrition 0.000 abstract description 15
- 239000011686 zinc sulphate Substances 0.000 abstract description 15
- PVCCISSCNBXSKD-UHFFFAOYSA-N zinc heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn] PVCCISSCNBXSKD-UHFFFAOYSA-N 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 26
- 239000000853 adhesive Substances 0.000 description 19
- 230000001070 adhesive effect Effects 0.000 description 19
- 239000000243 solution Substances 0.000 description 17
- 238000002129 infrared reflectance spectroscopy Methods 0.000 description 16
- ALAZBPVYKYPJEN-UHFFFAOYSA-K S(=O)(=O)([O-])[O-].O[Zn+2] Chemical compound S(=O)(=O)([O-])[O-].O[Zn+2] ALAZBPVYKYPJEN-UHFFFAOYSA-K 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 10
- 239000004593 Epoxy Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 229920006332 epoxy adhesive Polymers 0.000 description 8
- 238000004566 IR spectroscopy Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 150000004677 hydrates Chemical class 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 241000282485 Vulpes vulpes Species 0.000 description 2
- 238000004847 absorption spectroscopy Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000000313 electron-beam-induced deposition Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001540 jet deposition Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- 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
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- 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
- C23C22/68—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 solutions with pH between 6 and 8
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
- C23C28/3225—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only with at least one zinc-based layer
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- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Chemical Treatment Of Metals (AREA)
- Coating With Molten Metal (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
−亜鉛又はその合金をベースとする金属コーティングが、0.2重量%〜0.4重量%の間のアルミニウムを含み、残部が、亜鉛及び製造工程から生じる不可避の不純物である。
−亜鉛又はその合金をベースとする金属コーティングが、少なくとも0.1重量%のマグネシウムを含む。
−亜鉛又はその合金をベースとする金属コーティングが、最大含有量10重量%のマグネシウム、最大含有量20重量%のアルミニウム、最大含有量0.3重量%のシリコンのうち、少なくとも1つの元素を含む。
−硫酸亜鉛系層の硫黄の表面密度が、3.7〜27mg/m2の間である。
−(i)少なくとも1つの面を亜鉛又はその合金をベースとする金属コーティングでコーティングされた鋼のストリップを提供する工程。
−(ii)少なくとも0.01mol/Lの硫酸亜鉛を含む水性処理溶液を、簡易な接触で金属コーティングに施用して、湿潤膜を形成する工程。
−(iii)その後、水性処理溶液を乾燥用空気温度80℃未満の乾燥機で乾燥する工程であって、水性処理溶液が金属コーティングへ施用されてから乾燥機を出るまでの間の時間が、4秒未満であり、遊離水分子又は遊離ヒドロキシル基のいずれも含まない硫酸亜鉛系層であって、前記硫酸亜鉛系層中の硫黄の表面密度が、0.5mg/m2以上であるものを金属コーティング上に形成するように、ストリップ速度、湿潤膜厚、初期ストリップ温度及び空気流量を調整する工程。
−金属コーティングが、含有量10重量%までのマグネシウム、含有量20重量%までのアルミニウム、含有量0.3重量%までのシリコンのうち、最終的に少なくとも1つの元素を含む溶融亜鉛浴中での溶融めっき法によって得られる。
−金属コーティングが、水性処理溶液の施用の前に脱脂される。
−水性処理溶液が、20〜160g/Lの間の硫酸亜鉛七水和物を含む。
−ストリップ速度が、60〜200m/分の間である。
−湿潤膜の厚さが、0.5〜4μmの間である。
−ストリップの初期温度が、20〜50℃の間である。
−空気流量が、5000〜50000Nm3/時である。
−コーティング重量2g/m2未満の油膜が、硫酸亜鉛系層に施用される。
[Znx(SO4)y(OH)z、tH2O]の化合物を意味し、
式中、2x=2y+zであり、y及びzは0ではない。
zは、好ましくは6以上であり、より好ましくはz=6、及び3≦t≦5である。特に、x=4、y=1、z=6、及びt=3である化合物が、先行技術からの金属板上で確認された。
図3a)に示すように、乾燥機の出口で硫酸亜鉛系層が乾燥する領域は、ストリップ速度(m/分単位のA)及び空気流量(Nm3/時単位のB)に応じて与えられる。等高線は、乾燥機の出口での水膜の厚さに対応する。したがって、硫酸亜鉛系層は、0.1μmの等高線より上(白い領域)の条件では乾燥する。
−乾燥用空気温度:70℃
−初期ストリップ温度:30℃
−初期膜厚:2μm
−接触時間:4秒未満
図3b)に示すように、乾燥機の出口で硫酸亜鉛系層が乾燥する領域は、ストリップ速度(m/分単位のA)及びストリップ初期温度(℃単位のB)に応じて与えられる。
−乾燥用空気温度:70℃
−空気流量:5000Nm3/時
−初期膜厚:2μm
−接触時間:4秒未満
図3c)に示すように、乾燥機の出口で硫酸亜鉛系層が乾燥する領域は、空気流量(Nm3/時単位のA)及びストリップ温度(℃単位のB)に応じて与えられる。
−乾燥用空気温度:70℃
−ストリップ速度:120m/分
−初期膜厚:2μm
−接触時間:4秒未満
図3d)に示すように、乾燥機の出口で硫酸亜鉛系層が乾燥する領域は、空気流量(Nm3/時単位のA)及び初期膜厚(μm単位のB)に応じて与えられる。
−乾燥用空気温度:70℃
−ストリップ速度:120m/分
−初期ストリップ温度:30℃
−接触時間:4秒未満
図3e)に示すように、乾燥機の出口で硫酸亜鉛系層が乾燥する領域は、空気流量(Nm3/時単位のA)及び乾燥用空気温度(℃単位のB)に応じて与えられる。
−初期ストリップ温度:30℃−ストリップ速度:120m/分
−初期膜厚:2μm
−接触時間:4秒未満
−サンプルA:
○乾燥用空気温度:65℃
○ストリップ速度:100m/分
○初期ストリップ温度:30℃
○初期膜厚:2μm
○空気流量:10000Nm3/時
−サンプルB:
○乾燥用空気温度:70℃
○ストリップ速度:180m/分
○初期ストリップ温度:40℃
○初期膜厚:1μm
○空気流量:35000Nm3/時
−サンプルC:
○乾燥用空気温度:110℃、
○ストリップ速度:100m/分
○初期ストリップ温度:30℃
○初期膜厚:3μm
○空気流量:45000Nm3/時
−サンプルD:
○乾燥用空気温度:140℃、
○ストリップ速度:110m/分
○初期ストリップ温度:30℃
○初期膜厚:2μm
○空気流量:12000Nm3/時
−サンプルE:
○乾燥用空気温度:150℃、
○ストリップ速度:120m/分
○初期ストリップ温度:22℃
○初期膜厚:3μmo
〇空気流量:8300Nm3/時
−接着剤の大部分に亀裂が現れた場合、凝集破壊、
−表面的な凝集破壊とは、ストリップ/接着剤界面付近の接着剤の大部分に亀裂が現れることである。
−ストリップ/接着剤の界面に亀裂が現れた場合、接着不良。
接着不良が確認された場合、試験は不合格である。
− 40℃±3℃、相対湿度約98%で8時間の第1段階、それに続く
− 21℃±3℃、相対湿度98%未満で16時間の第2段階。
Claims (15)
- 亜鉛又はその合金をベースとする金属コーティングで少なくとも1つの面がコーティングされた鋼基材であって、前記金属コーティング自体が、硫酸亜鉛一水和物、硫酸亜鉛四水和物及び硫酸亜鉛七水和物から選択される化合物の少なくとも1つを含む硫酸亜鉛系層でコーティングされ、前記硫酸亜鉛系層が、ヒドロキシ硫酸亜鉛、遊離水分子又は遊離ヒドロキシル基のいずれも含まず、前記硫酸亜鉛系層中の硫黄の表面密度が、0.5mg/m2以上である鋼基材。
- 前記亜鉛又はその合金をベースとする金属コーティングが、0.2重量%〜0.4重量%の間アルミニウムを含み、残部が、亜鉛及び製造工程から生じる不可避の不純物である、請求項1に記載の鋼基材。
- 前記亜鉛又はその合金をベースとする金属コーティングが、少なくとも0.1重量%のマグネシウムを含む、請求項1に記載の鋼基材。
- 前記亜鉛又はその合金をベースとする金属コーティングが、最大含有量10重量%のマグネシウム、最大含有量20重量%のアルミニウム、最大含有量0.3重量%のシリコンのうち、少なくとも1つの元素を含む、請求項1に記載の鋼基材。
- 前記硫酸亜鉛系層中の前記硫黄の表面密度が、3.7〜27mg/m2の間である、請求項1〜4のいずれか一項に記載の鋼基材。
- 請求項1〜5のいずれか一項に記載の鋼基材で作られた自動車部品。
- 走行する金属ストリップの処理方法であって、
(i)少なくとも1つの面を亜鉛又はその合金をベースとする金属コーティングでコーティングされた鋼のストリップを提供する工程、
(ii)少なくとも0.01mol/Lの硫酸亜鉛を含む水性処理溶液を簡易な接触で前記金属コーティングに施用して、湿潤膜を形成する工程、
(iii)その後、前記水性処理溶液を乾燥用空気温度80℃未満の乾燥機内で乾燥する工程であって、前記水性処理溶液が前記金属コーティングへ施用されてから前記乾燥機を出るまでの時間が、4秒未満であり、遊離水分子又は遊離ヒドロキシル基のいずれも含まない硫酸亜鉛系層であって、前記硫酸亜鉛系層中の硫黄の表面密度が、0.5mg/m2以上であるものを前記金属コーティング上に形成するように、ストリップ速度、湿潤膜厚、初期ストリップ温度及び空気流量を調整する工程
を含む処理方法。 - 前記金属コーティングが、最大含有量10重量%のマグネシウム、最大含有量20重量%のアルミニウム、最大含有量0.3重量%のシリコンのうち、少なくとも1つの元素を最終的に含む溶融亜鉛浴での溶融めっき法によって得られている、請求項7に記載の処理方法。
- 前記金属コーティングが、前記水性処理溶液の施用前に脱脂される、請求項7又は8のいずれか一項に記載の処理方法。
- 前記水性処理溶液が、20〜160g/Lの間の硫酸亜鉛七水和物を含む、請求項7〜9のいずれか一項に記載の処理方法。
- 前記ストリップ速度が、60〜200m/分の間である、請求項7〜10のいずれか一項に記載の処理方法。
- 前記湿潤膜厚が、0.5〜4μmの間である、請求項7〜11のいずれか一項に記載の処理方法。
- 前記初期ストリップ温度が、20〜50℃の間である、請求項7〜12のいずれか一項に記載の処理方法。
- 前記空気流量が、5000〜50000Nm3/時の間である、請求項7〜13のいずれか一項に記載の処理方法。
- 2g/m2未満のコーティング重量の油膜が、前記硫酸亜鉛系層上に施用される、請求項7〜14のいずれか一項に記載の処理方法。
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KR20200045533A (ko) | 2020-05-04 |
MA50350B1 (fr) | 2024-05-31 |
ZA202000836B (en) | 2021-08-25 |
PL3695022T3 (pl) | 2024-07-08 |
CA3073016C (en) | 2022-05-31 |
EP3695022A1 (en) | 2020-08-19 |
CN111133123B (zh) | 2021-12-03 |
CA3073016A1 (en) | 2019-04-18 |
MA50350A (fr) | 2020-08-19 |
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