JP6648273B2 - 親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼およびその製造方法 - Google Patents
親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼およびその製造方法 Download PDFInfo
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- JP6648273B2 JP6648273B2 JP2018526883A JP2018526883A JP6648273B2 JP 6648273 B2 JP6648273 B2 JP 6648273B2 JP 2018526883 A JP2018526883 A JP 2018526883A JP 2018526883 A JP2018526883 A JP 2018526883A JP 6648273 B2 JP6648273 B2 JP 6648273B2
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- stainless steel
- fuel cell
- separator
- polymer fuel
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- 229910001220 stainless steel Inorganic materials 0.000 title claims description 128
- 239000010935 stainless steel Substances 0.000 title claims description 125
- 239000000446 fuel Substances 0.000 title claims description 116
- 229920000642 polymer Polymers 0.000 title claims description 69
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 238000000576 coating method Methods 0.000 claims description 75
- 239000011248 coating agent Substances 0.000 claims description 72
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 60
- 238000012986 modification Methods 0.000 claims description 56
- 230000004048 modification Effects 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 56
- 238000002161 passivation Methods 0.000 claims description 47
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 23
- 238000000137 annealing Methods 0.000 claims description 21
- 239000002253 acid Substances 0.000 claims description 18
- 230000007797 corrosion Effects 0.000 claims description 18
- 238000005260 corrosion Methods 0.000 claims description 18
- 238000009792 diffusion process Methods 0.000 claims description 18
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 15
- 229910017604 nitric acid Inorganic materials 0.000 claims description 15
- 229910052804 chromium Inorganic materials 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000005097 cold rolling Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 9
- 229910052748 manganese Inorganic materials 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 8
- 229910052758 niobium Inorganic materials 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- 229910052720 vanadium Inorganic materials 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 2
- 230000001154 acute effect Effects 0.000 claims 1
- 239000011651 chromium Substances 0.000 description 43
- 239000000243 solution Substances 0.000 description 43
- 239000007789 gas Substances 0.000 description 24
- 239000010410 layer Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 17
- 239000000203 mixture Substances 0.000 description 16
- 230000002829 reductive effect Effects 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 13
- 230000001965 increasing effect Effects 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 238000002407 reforming Methods 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 10
- 239000000376 reactant Substances 0.000 description 10
- 239000011572 manganese Substances 0.000 description 9
- 239000012528 membrane Substances 0.000 description 9
- 238000000926 separation method Methods 0.000 description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 7
- 239000010955 niobium Substances 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- 238000010828 elution Methods 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
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- 238000010191 image analysis Methods 0.000 description 4
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- 239000000047 product Substances 0.000 description 4
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- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
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- 238000005520 cutting process Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
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- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000003411 electrode reaction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000009832 plasma treatment Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical group [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0206—Metals or alloys
- H01M8/0208—Alloys
- H01M8/021—Alloys based on iron
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
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- C—CHEMISTRY; METALLURGY
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
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- C—CHEMISTRY; METALLURGY
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0242—Flattening; Dressing; Flexing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—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
- C23C22/50—Treatment of iron or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/081—Iron or steel solutions containing H2SO4
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/086—Iron or steel solutions containing HF
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Description
また、前記パターンの幅は、0.5〜3mmであってもよい。
E正極≧1.0 −−−−−−−−−−−−− (1)
|E正極|+|E負極|≧2.0 −−−−−−−−−−−−− (2)
このような現象は、燃料ガスが不足した状態で負荷電流が強制的に加えられれば、燃料がない状態で電子とプロトンを作るためにアノードの触媒を担持しているカーボンが水と反応するからであり、このような反応の結果として、アノード側触媒の損失が発生し、有効電極面積の減少を引き起こし、燃料電池の性能を低下させる。
E正極≧1.0 −−−−−−−−−− (1)
|E正極|+|E負極|≧2.0 −−−−−−−−−− (2)
本発明の実施例による発明鋼1〜3は、それぞれ下記表1の組成を含み、連続鋳造工程を経てスラブを製造した後、熱間圧延および冷間圧延工程を経て0.1mm厚さの冷延薄板形態で製造した。
発明鋼1の組成を有するフェライト系ステンレス鋼をZ−mill冷間圧延機を用いて冷間圧延した後、水素(75vol%)および窒素(25vol%)が含有された還元性の雰囲気で光輝焼鈍熱処理を実施した0.1mm厚さの冷延薄板を下記表2の実施例1の条件によって張力を印加して変形を加えた。以後、下記表3の条件によって硫酸溶液内で第1および第2被膜改質を行った後、硝酸およびフッ酸が含まれた混酸溶液で浸漬する第3被膜改質工程を実施した後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の実施例2の条件によって張力を印加したことを除いては、実施例1と同じ条件で行った後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の実施例3の条件によって張力を印加したことを除いては、実施例1と同じ条件で行った後、物性を評価した。
発明鋼2の組成を有するフェライト系ステンレス鋼をZ−mill冷間圧延機を用いて冷間圧延した後、水素(75vol%)および窒素(25vol%)が含有された還元性の雰囲気で光輝焼鈍熱処理を実施した0.1mm厚さの冷延薄板を下記表2の実施例4の条件によって張力を印加して変形を加えた。以後、下記表3の条件によって硫酸溶液内で第1および第2被膜改質した後、硝酸およびフッ酸が含まれた混酸溶液で浸漬する第3被膜改質工程を実施した後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の実施例5の条件によって張力を印加したことを除いては、実施例4と同じ条件で行った後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の実施例6の条件によって張力を印加したことを除いては、実施例4と同じ条件で行った後、物性を評価した。
発明鋼3の組成を有するフェライト系ステンレス鋼をZ−mill冷間圧延機を用いて冷間圧延した後、水素(75vol%)および窒素(25vol%)が含有された還元性の雰囲気で光輝焼鈍熱処理を実施した0.1mm厚さの冷延薄板を下記表2の実施例7の条件によって張力を印加して変形を加えた。以後、下記表3の条件によって硫酸溶液内で第1および第2被膜改質した後、硝酸およびフッ酸が含まれた混酸溶液で浸漬する第3被膜改質工程を実施した後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の実施例8の条件によって張力を印加したことを除いては、実施例7と同じ条件で行った後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の実施例9の条件によって張力を印加したことを除いては、実施例7と同じ条件で行った後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の比較例1の条件によって張力を印加したことを除いては、実施例1と同じ条件で行った後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の比較例2の条件によって張力を印加したことを除いては、実施例4と同じ条件で行った後、物性を評価した。
0.1mm厚さの冷延薄板を下記表2の比較例3の条件によって張力を印加したことを除いては、実施例7と同じ条件で行った後、物性を評価した。
Claims (25)
- 質量%で、C:0超〜0.02%、N:0超〜0.02%、Si:0超〜0.25%、Mn:0超〜0.2%、P:0超〜0.04%、S:0超〜0.02%、Cr:20〜34%、V:0超〜0.6%、Ti:0超〜0.5%、Nb:0超〜0.5%であり、残部Feおよびその他不可避な不純物からなる高分子燃料電池の分離板用ステンレス鋼において、
前記ステンレス鋼の表面に圧延長さ方向に対して傾斜した方向に複数のパターンが形成され、それぞれの前記パターンは、圧延長さ方向に互いに繰り返される、親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。 - 前記パターンは、圧延長さ方向に対して35〜60°傾斜した方向に形成される請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記パターンは、互いに平行するように形成される、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記パターンは、圧延長さ方向に互いに交差するように形成される、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記ステンレス鋼の表面にマイクロピットが形成され、
前記パターンは、互いに異なるマイクロピット面積分率を有する、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。 - 前記パターンの幅が0.5〜3mmである、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記パターン上に形成されたマイクロピットの面積分率が2〜50%である、請求項5に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記パターン間のマイクロピットの面積分率の差が2%以上である、請求項7に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記パターン上に形成されたマイクロピットの平均直径は0.05〜20μmである、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記ステンレス鋼は、Mo:0.05〜2.5%をさらに含む、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記ステンレス鋼の不動態被膜内に含有されたCr水酸化物/Cr酸化物の比が0.5〜1.7である、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記ステンレス鋼の不動態被膜の厚さが3.5nm以下(0除外)である、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記ステンレス鋼の表面に対して水滴がなす鋭角である接触角(contact angle,α)が70°以下である請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記ステンレス鋼とAu−coat Cu plateを使用してDC−4 probe法で測定したガス拡散層の接触抵抗が10mΩ・cm2以下である請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 前記ステンレス鋼の不動態被膜の腐食電位が0.3V(SCE)以上である、請求項1に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼。
- 質量%で、C:0超〜0.02%、N:0超〜0.02%、Si:0超〜0.25%、Mn:0超〜0.2%、P:0超〜0.04%、S:0超〜0.02%、Cr:20〜34%、V:0超〜0.6%、Ti:0超〜0.5%、Nb:0超〜0.5%であり、残部Feおよびその他不可避な不純物からなるステンレス鋼を冷間圧延して、ステンレス冷延薄板を製造する段階と、
前記冷延薄板に延伸率5%以下の張力を印加する段階と、を含み、
延伸された前記冷延薄板の表面に圧延長さ方向に対して傾斜した方向に複数のパターンが形成され、それぞれの前記パターンは、圧延長さ方向に互いに繰り返される、親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。 - 前記冷延薄板を焼鈍して、前記冷延薄板の表面に第1不動態被膜を形成する熱処理段階と、
前記第1不動態被膜を改質して、前記冷延薄板の表面に第2不動態被膜を形成する被膜改質段階と、を含む、請求項16に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。 - 前記熱処理段階および被膜改質段階は、前記冷延薄板に張力を印加した後に行われる、請求項17に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。
- 前記熱処理段階および被膜改質段階は、前記冷延薄板に張力を印加する前に行われる、請求項17に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。
- 前記焼鈍は、光輝焼鈍または連続焼鈍である請求項17に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。
- 前記被膜改質段階は、
硫酸溶液で第1電流密度で電解処理する第1被膜改質段階と、
前記硫酸溶液で前記第1電流密度以下の第2電流密度で電解処理する第2被膜改質段階と、
硝酸およびフッ酸を含む混酸溶液に浸漬する第3被膜改質段階と、を含む、請求項17に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。 - 前記第1被膜改質段階および前記第2被膜改質段階は、連続的に行われる、請求項21に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。
- 前記第1被膜改質段階で、前記第1電流密度に対応する前記冷延薄板の電位が下記の式(1)および(2)を満たす、請求項21に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。
E正極≧1.0 −−−−− (1)
|E正極|+|E負極|≧2.0 −−−−− (2) - 前記第1被膜改質段階および前記第2被膜改質段階で、前記硫酸溶液の濃度が50〜300g/Lであり、前記硫酸溶液の温度が40〜80℃である、請求項21に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。
- 前記第3被膜改質段階で、前記混酸溶液内の前記硝酸の濃度が100〜200g/Lであり、前記フッ酸の濃度が70g/L以下であり、前記混酸溶液の温度が40〜60℃である、請求項21に記載の親水性および接触抵抗が向上した高分子燃料電池の分離板用ステンレス鋼の製造方法。
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