JP2023507725A - 耐黄変性及びリン酸塩処理性が向上した鋼板及びその製造方法 - Google Patents
耐黄変性及びリン酸塩処理性が向上した鋼板及びその製造方法 Download PDFInfo
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- JP2023507725A JP2023507725A JP2022536685A JP2022536685A JP2023507725A JP 2023507725 A JP2023507725 A JP 2023507725A JP 2022536685 A JP2022536685 A JP 2022536685A JP 2022536685 A JP2022536685 A JP 2022536685A JP 2023507725 A JP2023507725 A JP 2023507725A
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- Prior art keywords
- steel sheet
- phosphating
- yellowing resistance
- improved
- improved yellowing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 151
- 239000010959 steel Substances 0.000 title claims abstract description 151
- 238000004383 yellowing Methods 0.000 title claims abstract description 94
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 34
- 239000010410 layer Substances 0.000 claims description 24
- 229910052749 magnesium Inorganic materials 0.000 claims description 24
- 238000007747 plating Methods 0.000 claims description 20
- 229910052725 zinc Inorganic materials 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- 229910052759 nickel Inorganic materials 0.000 claims description 13
- 229910052748 manganese Inorganic materials 0.000 claims description 9
- 239000003973 paint Substances 0.000 claims description 9
- 229910052801 chlorine Inorganic materials 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 229910052708 sodium Inorganic materials 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 7
- 230000003449 preventive effect Effects 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- 229910052726 zirconium Inorganic materials 0.000 claims description 6
- 238000009713 electroplating Methods 0.000 claims description 5
- 239000011342 resin composition Substances 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 59
- 238000005406 washing Methods 0.000 abstract description 44
- 238000001816 cooling Methods 0.000 abstract description 23
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 11
- 238000005554 pickling Methods 0.000 abstract description 11
- 239000000126 substance Substances 0.000 abstract description 11
- 238000001035 drying Methods 0.000 abstract description 5
- 239000011777 magnesium Substances 0.000 description 31
- 238000000034 method Methods 0.000 description 30
- 229910019142 PO4 Inorganic materials 0.000 description 27
- 239000011575 calcium Substances 0.000 description 27
- 239000010452 phosphate Substances 0.000 description 27
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 24
- 239000010960 cold rolled steel Substances 0.000 description 21
- 229910052698 phosphorus Inorganic materials 0.000 description 18
- 229910052799 carbon Inorganic materials 0.000 description 17
- 239000011572 manganese Substances 0.000 description 17
- 229910052760 oxygen Inorganic materials 0.000 description 17
- 238000012360 testing method Methods 0.000 description 17
- 229910052791 calcium Inorganic materials 0.000 description 14
- 239000011701 zinc Substances 0.000 description 14
- 238000000137 annealing Methods 0.000 description 12
- 239000010949 copper Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 239000011734 sodium Substances 0.000 description 6
- 239000012153 distilled water Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
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- 238000011156 evaluation Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- -1 phosphate ester Chemical class 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 2
- 239000005695 Ammonium acetate Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229940043376 ammonium acetate Drugs 0.000 description 2
- 235000019257 ammonium acetate Nutrition 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- 238000010899 nucleation Methods 0.000 description 2
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- 239000002245 particle Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000005494 tarnishing Methods 0.000 description 2
- WQNHWIYLCRZRLR-UHFFFAOYSA-N 2-(3-hydroxy-2,5-dioxooxolan-3-yl)acetic acid Chemical compound OC(=O)CC1(O)CC(=O)OC1=O WQNHWIYLCRZRLR-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-SQOUGZDYSA-M D-gluconate Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O RGHNJXZEOKUKBD-SQOUGZDYSA-M 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920000289 Polyquaternium Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940050410 gluconate Drugs 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
Classifications
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
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- 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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS 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
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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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- 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
- 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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- C23C2/12—Aluminium or alloys based thereon
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- C23C22/22—Orthophosphates containing alkaline earth metal cations
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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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- C—CHEMISTRY; METALLURGY
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Abstract
Description
(1)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Ni、Fe、Cu又はZnの少なくとも一つ以上の成分を含むフラッシュめっき層を形成する段階;
(2)上記耐黄変性及びリン酸塩処理性が向上した鋼板上にリン酸塩処理層を形成する段階;
(3)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Zn、Al、Mg及びSiの少なくとも一つ以上の成分を溶融めっき又は電気めっきによってめっきする段階;
(4)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に防錆油を塗布する段階;
(5)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に樹脂組成物を塗布して樹脂層を形成する段階;
(6)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に塗料を塗布して塗装層を形成する段階。
(1)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Ni、Fe、Cu又はZnの少なくとも一つ以上の成分を含むフラッシュめっき層を形成する段階;
(2)上記耐黄変性及びリン酸塩処理性が向上した鋼板上にリン酸塩処理層を形成する段階;
(3)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Zn、Al、Mg及びSiの少なくとも一つ以上の成分を溶融めっき又は電気めっきによってめっきする段階;
(4)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に防錆油を塗布する段階;
(5)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に樹脂組成物を塗布して樹脂層を形成する段階;
(6)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に塗料を塗布して塗装層を形成する段階。
(1)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Ni、Fe、Cu又はZnの少なくとも一つ以上の成分を含むフラッシュめっき層を形成する段階;
(2)上記耐黄変性及びリン酸塩処理性が向上した鋼板上にリン酸塩処理層を形成する段階;
(3)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Zn、Al、Mg及びSiの少なくとも一つ以上の成分を溶融めっき又は電気めっきによってめっきする段階;
(4)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に防錆油を塗布する段階;
(5)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に樹脂組成物を塗布して樹脂層を形成する段階;
(6)上記耐黄変性及びリン酸塩処理性が向上した鋼板上に塗料を塗布して塗装層を形成する段階。
実験例1~4
鋼板の組成として、Si1.1重量%及びMnを下記表1に示した含有量で含有している厚さが1.0mmである980MPa級冷延鋼板を横×縦100mm×100mmの大きさで加工した試験片を用いた。
○-耐黄変性有り:黄色度3以下である場合
×-耐黄変性無し:黄色度3超過である場合
-表面調節:薬品名PL-Z(大韓パーカライジング(株))、濃度pH7.5~11、処理時間21秒、表面調整液の温度25~35℃
-リン酸塩処理:薬品名PB-37(大韓パーカライジング(株))、遊離酸度0.6~1point、処理時間80秒、リン酸塩処理溶液の温度40~45℃
○-リン酸塩処理性の良好:カバレッジ90%以上
×-リン酸塩処理性の不良:カバレッジ90%未満
Mn2.8重量%を含む実験例3で用いられた試験片と同様の試験片3を用いて、上記実験例3と同一条件で酸洗及び水洗を行い、このとき、水洗は実験例3の蒸留水の代わりに、下記のように組成した水洗液500mlに10秒間沈積して水洗した。
○-表面外観が良好:ムラが全く発生しない
△-表面外観が普通:微細なムラが発生したが、製品として販売可能な水準
×-表面外観が不良:ムラがひどく発生した
実施例16~18及び比較例9~10は、後処理工程が含まれていない冷延鋼板の製造条件、すなわち焼鈍を終えた鋼板が水冷セクションで冷却して焼鈍炉を抜け出た後、調質圧延及び塗油を経て冷延鋼板となる工程に適用したものであって、水冷セクションの冷却水に化成処理液を実施例1と同様に組成して冷却する方法でリン酸塩処理性及び耐黄変性に及ぼす効果を上述の基準に基づいて評価し、その結果を以下の表4に示した。
Claims (8)
- Mnを0.5重量%以上含有する鋼板として、酸洗、水洗及び乾燥後に鋼板の表面に鋼成分を除いた成分として、0.01~10mg/m2のCa+Mg、0.01~10mg/m2のP、0.01~20mg/m2のC及び0.05~30mg/m2のOを含有する、耐黄変性及びリン酸塩処理性が向上した鋼板。
- 前記鋼板は、黄色度が3.0以下である、請求項1に記載の耐黄変性及びリン酸塩処理性が向上した鋼板。
- 前記鋼板の表面に鋼成分を除いて、N、Cl、F、Na、Al、Si、S、K、Ti、V、Cr、Mn、Co、Ni、Fe、Cu、Zn、Zr及びMoからなる群から選択される少なくとも一つ以上の成分を10mg/m2以下(0は除く)の含有量でさらに含有する、請求項1に記載の耐黄変性及びリン酸塩処理性が向上した鋼板。
- 請求項1から3のいずれか一項に記載の耐黄変性及びリン酸塩処理性が向上した鋼板上に、下記(1)~(6)の処理段階の少なくとも一つ以上の段階を含む、表面処理鋼板の製造方法。
(1)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Ni、Fe、Cu又はZnの少なくとも一つ以上の成分を含むフラッシュめっき層を形成する段階;
(2)前記耐黄変性及びリン酸塩処理性が向上した鋼板上にリン酸塩処理層を形成する段階;
(3)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Zn、Al、Mg及びSiの少なくとも一つ以上の成分を溶融めっき又は電気めっきによってめっきする段階;
(4)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に防錆油を塗布する段階;
(5)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に樹脂組成物を塗布して樹脂層を形成する段階;
(6)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に塗料を塗布して塗装層を形成する段階。 - Mnを0.5重量%以上含有する鋼板として、焼鈍熱処理、水冷及び乾燥後に鋼板の表面に鋼成分を除いた成分として、0.01~10mg/m2のCa+Mg、0.01~10mg/m2のP、0.01~20mg/m2のC及び0.05~30mg/m2のOを含有する、耐黄変性及びリン酸塩処理性が向上した鋼板。
- 前記鋼板は、黄色度が3.0以下である、請求項5に記載の耐黄変性及びリン酸塩処理性が向上した鋼板。
- 前記鋼板の表面に鋼成分を除いて、N、Cl、F、Na、Al、Si、S、K、Ti、V、Cr、Mn、Co、Ni、Fe、Cu、Zn、Zr及びMoからなる群から選択される少なくとも一つ以上の成分を10mg/m2以下(0は除く)の含有量でさらに含有する、請求項5に記載の耐黄変性及びリン酸塩処理性が向上した鋼板。
- 請求項5から7のいずれか一項に記載の耐黄変性及びリン酸塩処理性が向上した鋼板上に、下記(1)~(6)の処理段階の少なくとも一つ以上の段階を含む、表面処理鋼板の製造方法。
(1)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Ni、Fe、Cu又はZnの少なくとも一つ以上の成分を含むフラッシュめっき層を形成する段階;
(2)前記耐黄変性及びリン酸塩処理性が向上した鋼板上にリン酸塩処理層を形成する段階;
(3)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に、Zn、Al、Mg及びSiの少なくとも一つ以上の成分を溶融めっき又は電気めっきによってめっきする段階;
(4)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に防錆油を塗布する段階;
(5)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に樹脂組成物を塗布して樹脂層を形成する段階;
(6)前記耐黄変性及びリン酸塩処理性が向上した鋼板上に塗料を塗布して塗装層を形成する段階。
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WO2013108785A1 (ja) * | 2012-01-18 | 2013-07-25 | Jfeスチール株式会社 | 酸洗後の鋼板表面の黄変防止方法 |
JP2018537592A (ja) * | 2015-12-18 | 2018-12-20 | ポスコPosco | 酸洗鋼板の水洗用組成物及びこれを用いた酸洗鋼板の水洗方法、これにより得られた鋼板 |
WO2018173287A1 (ja) * | 2017-03-24 | 2018-09-27 | 新日鐵住金株式会社 | 鋼板の製造方法 |
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