WO2017175562A1 - 材料、この材料を用いた保存容器、この保存容器に取り付けられるバルブ、並びに、ClFの保存方法、ClFの保存容器の使用方法 - Google Patents
材料、この材料を用いた保存容器、この保存容器に取り付けられるバルブ、並びに、ClFの保存方法、ClFの保存容器の使用方法 Download PDFInfo
- Publication number
- WO2017175562A1 WO2017175562A1 PCT/JP2017/010752 JP2017010752W WO2017175562A1 WO 2017175562 A1 WO2017175562 A1 WO 2017175562A1 JP 2017010752 W JP2017010752 W JP 2017010752W WO 2017175562 A1 WO2017175562 A1 WO 2017175562A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clf
- storage container
- gas
- valve
- plating layer
- Prior art date
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- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000003860 storage Methods 0.000 title claims description 66
- 238000000034 method Methods 0.000 title claims description 29
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 127
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 69
- 239000010931 gold Substances 0.000 claims description 69
- 229910052737 gold Inorganic materials 0.000 claims description 69
- 238000007747 plating Methods 0.000 claims description 67
- 238000007789 sealing Methods 0.000 claims description 17
- 239000011261 inert gas Substances 0.000 claims description 13
- 238000011049 filling Methods 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 238000002161 passivation Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000531 Co alloy Inorganic materials 0.000 claims description 3
- 229910000617 Mangalloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 claims description 2
- OMRRUNXAWXNVFW-UHFFFAOYSA-N fluoridochlorine Chemical compound ClF OMRRUNXAWXNVFW-UHFFFAOYSA-N 0.000 description 100
- 238000012360 testing method Methods 0.000 description 45
- 238000010926 purge Methods 0.000 description 30
- 230000007797 corrosion Effects 0.000 description 27
- 238000005260 corrosion Methods 0.000 description 27
- 238000002474 experimental method Methods 0.000 description 14
- 238000012545 processing Methods 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000012856 packing Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
- 239000011737 fluorine Substances 0.000 description 7
- 229910052731 fluorine Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000003682 fluorination reaction Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012669 compression test Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 2
- -1 polychlorotrifluoroethylene Polymers 0.000 description 2
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- KNSWNNXPAWSACI-UHFFFAOYSA-N chlorine pentafluoride Chemical compound FCl(F)(F)(F)F KNSWNNXPAWSACI-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- JOHWNGGYGAVMGU-UHFFFAOYSA-N trifluorochlorine Chemical compound FCl(F)F JOHWNGGYGAVMGU-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
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- C—CHEMISTRY; METALLURGY
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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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- 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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- 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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- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
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- F17C2203/0641—Non-magnetic steels
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
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- F17C2203/0639—Steels
- F17C2203/0643—Stainless steels
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
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- F17C2203/0646—Aluminium
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
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- F17C2203/0648—Alloys or compositions of metals
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0326—Valves electrically actuated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0329—Valves manually actuated
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0382—Constructional details of valves, regulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0388—Arrangement of valves, regulators, filters
- F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/037—Containing pollutant, e.g. H2S, Cl
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/035—High pressure (>10 bar)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/04—Methods for emptying or filling
- F17C2227/044—Methods for emptying or filling by purging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/05—Improving chemical properties
- F17C2260/053—Reducing corrosion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/05—Applications for industrial use
- F17C2270/0518—Semiconductors
Definitions
- the present invention relates to a material, a storage container using the material, a valve attached to the storage container, a ClF storage method, and a ClF storage container usage method.
- Patent Document 1 discloses a technique of using ClF 3 (chlorine trifluoride) as a fluorine-based gas for cleaning a semiconductor manufacturing apparatus.
- ClF chlorine monofluoride
- ClF chlorine fluoride
- ClF 3 boiling point: 11.75 ° C.
- ClF 5 chlorine pentafluoride, boiling point: ⁇ 14 ° C.
- ClF is a toxic corrosive gas that has a very low boiling point and is extremely reactive. Accordingly, a material that suppresses the decrease in the concentration of ClF by suppressing the fluorination reaction and adsorption of ClF that comes into contact, and enables high-purity and safe handling of ClF, a storage container using this material, and this storage container Problems still remain with respect to the valves attached to the container, the ClF storage method, and the ClF storage container use method.
- the present invention has been made in view of such problems.
- the object of the present invention is to suppress the decrease in ClF concentration by suppressing the fluorination reaction and adsorption of ClF, and to achieve high purity and safe ClF.
- a storage container using the material, a valve attached to the storage container, a ClF storage method, and a ClF storage container usage method is provided.
- the material of the present invention is characterized in that at least a part thereof has a passive film of fluoride by contact with a gas containing ClF.
- the passive film has a thickness of 5 nm to 50 nm.
- the gas further includes one or more selected from the group consisting of ClF 3 and F 2 .
- the passive film is formed on at least one of manganese steel, stainless steel, chromium molybdenum steel, aluminum alloy, nickel alloy, cobalt alloy, gold, and resin.
- the storage container of the present invention is made of the above-described material and has an inner surface on which the passive film is formed.
- a valve attached to the storage container is provided, and the valve opens and closes the flow path by separating from and contacting the gas flow path, a valve seat having the flow path opened, and the valve seat.
- the passive film is formed on the flow path and at least a portion of the valve seat and the valve body in contact with gas.
- the valve body has a gas closing surface pressed against the valve seat when the flow path is closed, and the gas closing surface has a gold plating layer of 2 ⁇ m to 10 ⁇ m.
- the gold plating layer is sealed.
- the gold plating layer is oxidized.
- the passive film is formed on the gold plating layer.
- the valve body is a disk type.
- the valve body is a diaphragm.
- the method for producing a material of the present invention is characterized in that a passive film made of fluoride of the material is formed on the surface of the material by contacting a gas containing ClF.
- the concentration of the ClF in the gas is 1% by weight to 100% by weight.
- the ClF storage method of the present invention is characterized in that ClF is stored in a storage container in which a passivating film of fluoride is formed on the inner surface by introducing a gas containing ClF.
- the concentration of ClF stored in the storage container is 1 wt% to 100 wt%.
- the use method of the ClF storage container of the present invention is a method of using a storage container in which a passivating film of fluoride is formed on the inner surface by introducing a gas containing ClF, and is provided inside the storage container. A filling step of filling ClF, a use step of using the ClF by causing the filled ClF to flow out of the storage container after the filling step, and a decompression of the storage container by evacuation after the use step And a purging step of filling the storage container with an inert gas.
- the concentration of filled ClF is suppressed, and a material that enables high-purity and safe handling of ClF, A storage container using this material, a valve attached to the storage container, a ClF storage method, and a ClF storage container usage method can be provided.
- FIG. 1 is a partial cross-sectional view of a gas cylinder 2 using a material according to an embodiment of the present invention.
- the gas cylinder 2 is a storage container having pressure resistance for storing ClF, and includes a vessel wall 6 having an opening 4 at the top, a cylindrical base 8 attached to the opening 4, and a valve 10 attached to the base 8. Etc.
- the vessel wall 6 and the base 8 are made of at least one metal material such as manganese steel, stainless steel, chrome molybdenum steel, nickel alloy, and aluminum alloy.
- the stainless steel is not particularly limited as long as it has corrosion resistance to ClF, but austenitic, martensitic, ferrite, or other stainless steels can be used.
- the valve 10 includes a main body 12 which is a valve body, a gas flow path 14 formed in the main body 12, a valve seat 16 in which the flow path 14 is opened, a disc-type (disk type) valve element 18, and a valve element 18.
- a valve shaft 20 to which the lower end is coupled, a manual handle 21 to which the upper end of the valve shaft 20 is coupled, and the like are provided.
- the valve shaft 20 is sealed with a gland packing 22 mounted in the main body 12, and a disc packing 24 is provided on the valve seat 16.
- the valve shaft 20 is rotated.
- the valve body 18 is brought into contact with the valve seat 16 via the disc packing 24 to open and close the flow path 14.
- the valve 10 may be an all-metal valve. In this case, the disc packing 24 does not exist, and the flow path 14 is opened and closed by the valve body 18 coming into direct contact with the valve seat 16.
- the main body 12 is formed of, for example, at least one metal material of stainless steel, nickel alloy, or cobalt alloy, and a lower connection portion 12a that is attached to the inner surface 8a of the base 8 by screwing, and a cap-shaped closing plug (not shown) is screwed. A lateral connection portion 12b to be attached is formed.
- the gland packing 22 and the disk packing 24 are formed in an annular shape from a resin material such as PCTFE (polychlorotrifluoroethylene) or PTFE (polytetrafluoroethylene).
- FIG. 2 is an enlarged view showing a state where the valve element 18 is separated from the valve seat 16 in the valve 10 of FIG.
- a seal surface 18 a that closes the gas flow by closing the flow path 14 when the valve 10 is closed is formed.
- a gold plating layer 26 having a layer thickness of about 2 ⁇ m to 10 ⁇ m is formed on the seal surface 18a.
- the gold plating layer 26 is subjected to a sealing process in which pinholes formed in the gold plating layer 26 are closed with a processing agent. Alternatively, the gold plating layer 26 may be oxidized to form an oxide film.
- valve body 18 of the present embodiment has a disk shape as described above. For this reason, the pressing of the sealing surface 18a of the valve body 18 against the disc packing 24 of the valve seat 16 is performed by surface contact on a flat surface.
- the valve 10 is configured so that the valve body 18 is not in contact with the disc packing 24 of the valve seat 16 as compared with a needle valve (not shown) in which the needle-type valve body and the valve seat are pressed by line contact.
- the surface pressure of the seal surface 18a when the seal surface 18a is pressed is reduced. Therefore, peeling of the gold plating layer 26 from the seal surface 18a is effectively suppressed. Further, physical damage to the seal surface 18a during opening and closing of the valve 10 can be effectively avoided, deterioration of the seal surface 18a is suppressed, and as a result, the corrosion resistance of the valve 10 to ClF is enhanced.
- the inner surface 6a of the vessel wall 6 of the gas cylinder 2, the inner end face 8b of the base 8 facing the gas cylinder 2, the flow path 14 of the valve 10, the gold plating layer A passivation film 28 of fluoride is formed over the entire gas contact portion of the gas cylinder 2 including the base 8 and the valve 10 such as the valve body 18 including the sealing surface 18 a formed with the valve 26 and the valve seat 16 including the disk packing 24.
- the valve 10 such as the valve body 18 including the sealing surface 18 a formed with the valve 26 and the valve seat 16 including the disk packing 24.
- the passivation film 28 is formed by a so-called passivation treatment in which the gas contact part is brought into contact with a gas containing ClF (hereinafter also referred to as a use gas), and has a thickness of 5 nm or more, preferably about 5 nm to 50 nm.
- a gas containing ClF hereinafter also referred to as a use gas
- the thickness of the passive film 28 is 5 nm or more, which is a lower limit value capable of suppressing corrosion and damage of the material due to the fluorination reaction when ClF as a working gas comes into contact with the gas contact portion.
- the upper limit value of the film thickness of the passive film 28 is preferably about 50 nm.
- the gas contact time is a time counted from the moment when the gas used comes into contact.
- the higher the treatment temperature the faster the passive film 28 can be formed, and the film quality of the passive film 28 becomes stronger.
- the treatment temperature is preferably within the above temperature range.
- ClF has a strong adsorptivity to metal, the passive film 28 can be easily formed even at a low temperature.
- the higher the processing pressure the faster the passive film 28 can be formed, and the film quality of the passive film 28 becomes stronger.
- the processing pressure is preferably in the above range.
- the gas cylinder 2 that has been passivated is appropriately discharged, and after being purged with a vacuum pump and repeatedly filled with inert gas, the gas cylinder 2 is actually usable. It is said.
- FIG. 3 is a flowchart showing the method of using the gas cylinder 2 subjected to the above-described passivation process in time series.
- ⁇ Filling step: S1> the gas cylinder 2 in a usable state in which the passive film 28 is formed is filled with a gas containing ClF (hereinafter simply referred to as ClF or storage gas) and stored.
- a storage gas supply source (not shown) is connected to the lateral connection portion 12 b of the valve 10, and the storage gas is introduced into the gas cylinder 2.
- the valve 10 is closed and the storage gas is sealed and stored in the gas cylinder 2.
- step S2 the gas cylinder 2 filled with the storage gas is transported to the use destination of the storage gas and used.
- a storage gas supply destination (not shown) is connected to the lateral connection portion 12b of the valve 10 to open the valve 10, and the storage gas is discharged from the gas cylinder 2 and supplied to the storage gas supply destination.
- the valve 10 is closed and the gas cylinder 2 is recovered from the destination.
- step S3 a purge device (not shown) is connected to the lateral connection portion 12b of the valve 10 of the recovered gas cylinder 2. Then, the preservative gas remaining in the gas cylinder 2 is discharged while the gas cylinder 2 is depressurized by evacuation with a purge device, and then the gas cylinder 2 is filled with an inert gas.
- Inert gas refers to nitrogen or a rare gas with stable nuclides such as argon, helium, neon, xenon, krypton, etc., and a low-reactivity gas used for chemical synthesis, chemical analysis, and storage of highly reactive substances. It is. Because of its low reactivity, it is often used in applications where undesirable chemical reactions do not occur.
- the purge device is provided with a vacuum pump (not shown), which is depressurized to about ⁇ 0.1 MPaG, further filled with an inert gas to normal pressure, and a series of these depressurization and inert gas filling.
- a vacuum pump (not shown), which is depressurized to about ⁇ 0.1 MPaG, further filled with an inert gas to normal pressure, and a series of these depressurization and inert gas filling.
- Is configured to be able to perform a cycle purge that repeats many times. Since ClF easily permeates and adsorbs on metal, and it is not easy to blow off the adsorbed ClF, in order to prevent the gas cylinder 2 from being deteriorated, after the gas cylinder 2 is used, it is repeatedly filled with an inert gas and reduced in pressure by a vacuum pump. Perform the cycle purge by 10 times or more.
- the number of cycle purges is set according to the amount of ClF adsorbed on the gas cylinder 2, so that the ClF adsorbed on the gas cylinder 2 can be reliably removed, and the gas cylinder 2 can be used for a long time without corrosion. is there.
- the gas contact part of the gas cylinder 2 is likely to be corroded and deteriorated by moisture in the air after contact with ClF.
- the valve 10 is closed, the above-mentioned piping connected to the lateral connection portion 12b of the main body 12 of the valve 10 is removed, and the removed piping is accommodated in a container (not shown) such as a separately prepared desiccator, and nitrogen or the like is not contained. Purge with active gas and store. Further, the above-described stopper plug is attached to the lateral connection portion 12b. Thereby, the corrosion by the said piping and the horizontal connection part 12b being exposed to air can be prevented.
- the purge amount of the pipe with the inert gas is larger and the purge time is longer.
- the purge amount is defined by the amount of inert gas per purge and the number of purges.
- the surface corrosion degree is calculated from the change in weight of the test piece, the surface area, and the experiment time. For this reason, it becomes a negative value when the weight of the test piece is reduced due to corrosion of the gold plating layer.
- corrosion includes a phenomenon that fluoride or chloride is formed or penetrates into the gold plating layer, resulting in discoloration of the gold plating layer or peeling of the gold plating layer. Defined.
- Example 1 ⁇ Gold plating layer thickness: 7.3 to 8.4 ⁇ m -Sealing treatment for the gold plating layer: None-Oxidation treatment for the gold plating layer: As a result of carrying out the compression test of ClF on the test piece without ⁇ Weight change of test piece: 0.009% increase ⁇ Surface corrosion degree of test piece: 0.0014 mg / cm 2 ⁇ h As a result, the gold plating layer was peeled off from the test piece: None, and the test was successful.
- Example 2 ⁇ Gold plating layer thickness: 2.5-2.6 ⁇ m -Sealing treatment for the gold plating layer: Yes-Oxidation treatment for the gold plating layer: As a result of carrying out the ClF pressing test on the test piece that is not, ⁇ Weight change of test piece: 0.002% increase ⁇ Surface corrosion degree of test piece: 0.0003 mg / cm 2 ⁇ h And got the result.
- the thickness of the gold plating layer is about 1/3 thinner than in the case of Example 1, but both the weight change of the test piece and the surface corrosion degree are both about 1 /. 4 and the corrosion of the gold plating layer by ClF could be greatly suppressed. So finally, -Peeling of the gold plating layer from the test piece: None, and passed.
- Example 3 ⁇ Gold plating layer thickness: 2.5-2.6 ⁇ m -Sealing treatment for the gold plating layer: None-Oxidation treatment for the gold plating layer: As a result of performing a ClF tension test on the test piece, ⁇ Weight change of test piece: 0.014% increase ⁇ Surface corrosion degree of test piece: 0.0021 mg / cm 2 ⁇ h And got the result.
- the thickness of the gold plating layer is about 1/3 that of Example 1, but both the weight change of the test piece and the surface corrosion degree are both about 1.5. Doubled.
- Example 4 ⁇ Gold plating layer thickness: 2.5-2.6 ⁇ m -Sealing treatment for the gold plating layer: None-Oxidation treatment for the gold plating layer: As a result of carrying out the compression test of ClF on the test piece without ⁇ Weight change of test piece: 0.005% decrease ⁇ Surface corrosion degree of test piece: -0.0008 mg / cm 2 ⁇ h And got the result. In this case, since the weight of the test piece is reduced and the surface corrosion degree of the test piece is a negative value, the corrosion of the gold plating layer is proceeding. And finally, ⁇ Peeling of the gold plating layer from the test piece: Yes. However, peeling of the gold plating layer in this example was very small, and it was found that no leak occurred as a result of a leak test in Experiment 2 described later.
- the test piece with a thick gold plating layer could prevent the gold plating layer from peeling off, resulting in higher durability against ClF.
- a slight amount of peeling of the gold plating layer does not cause a leak, and it is found that it is preferable to form a gold plating layer having a layer thickness of at least about 2 ⁇ m to 10 ⁇ m. did.
- the test piece having the gold plating layer subjected to the sealing treatment or the oxidation treatment has the result that the surface corrosion of the test piece is suppressed and peeling of the gold plating layer is prevented even if the gold plating layer is thin.
- the test piece tends to increase in weight as corrosion progresses, and the test piece from which the gold plating layer has peeled is reduced in weight by the peeled gold plating layer.
- the gold plating layer 26 formed on the sealing surface 18a of the valve body 18 of the valve 10 is subjected to sealing treatment or oxidation treatment. It has been confirmed that the durability of the valve 10 against ClF is increased, and that ClF can be stored and handled safely in the gas cylinder 2.
- both the sealing treatment and the oxidation treatment may be performed on the gold plating layer 26. In this case, of course, the peeling of the gold plating layer 26 can be prevented.
- Example 6 The thickness of the passive film formed by ClF formed on the test piece was 4 nm.
- the thickness of the passive film formed by F 2 formed on the test piece was 8 nm, and a passive film having a double thickness was formed by the passivation treatment under the same conditions.
- a thinner passive film can be formed by the passivation treatment with ClF.
- the valve body 18 of the valve 10 the valve seat 16, the disc packing 24, etc. It is possible to form a thin passive film 28 that is not easily affected and does not affect the closing performance of the valve 10 as much as possible. Therefore, it was confirmed that the passivation treatment with ClF is effective in the storage and handling of ClF.
- the film thickness of the passive film 28 made of ClF varies depending on the type of material such as metal with which the introduced gas comes into contact, the surface roughness of the material, the use conditions of the introduced gas, and the like.
- the film thickness of the passive film by ClF was 4 nm.
- this result is only a result under the conditions employed in Experiment 3, and under different conditions, It has been found that 28 preferably has a film thickness of at least 5 nm to 50 nm.
- the purge device performs cycle purge that repeats decompression with a vacuum pump and filling with an inert gas. Thereafter, the purge device is removed, and a gas detector (not shown) is connected instead. Then, the experimental valve was opened, and as shown in Table 4, the residual amount of ClF in the gas cylinder 2 was measured every cycle purge, and the presence or absence of ClF detection was determined.
- the number of cycle purges in which residual ClF is not detected varies depending on the type of material such as metal with which the introduced gas comes into contact, the surface roughness of the material, the use conditions of the introduced gas, and the like.
- the number of cycle purges is 50 or 70, ClF is detected and it cannot be said that the test is acceptable.
- this result is only a result under the conditions employed in Experiment 4, and it has been found that the cycle purge may be performed at least 10 times under different conditions. Yes.
- the passivation film 28 is formed in advance on the gas contact portion between the gas cylinder 2, the base 8 constituting the gas cylinder 2, and the valve 10, so that the fluoride of ClF filled in the gas cylinder 2 is formed. Reaction and adsorption are suppressed, and a decrease in the concentration of stored ClF is suppressed. Accordingly, there are provided a gas cylinder 2 that enables high-purity and safe handling of ClF, a valve 10 attached to the gas cylinder 2, a method of storing ClF using the gas cylinder 2, and a method of using the gas cylinder 2 storing ClF. Can be provided.
- the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.
- the passive film 28 is formed not only on the gas cylinder 2 but on at least a part of the materials of various members and devices, the fluorination reaction of ClF in contact with the material can be suppressed at least.
- a diaphragm valve (not shown) may be used instead of the valve 10 having the disk-type valve body 18. Since the diaphragm valve generally has a small dead space in the valve, the replacement of the inert gas in the gas contact portion of the valve, that is, the cycle purge can be performed more efficiently.
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Abstract
Description
そして、特許文献1には、フッ素系ガスとして、ClF3(三フッ化塩素)を半導体製造装置のクリーニングに使用する技術が開示されている。
好ましくは、前記不動態被膜は、5nm~50nmの膜厚を有する。
好ましくは、前記ガスは、ClF3及びF2からなる群より選択される1つ以上をさらに含む。
また、本発明の保存容器は、上述した材料からなり、前記不動態被膜が形成された内面を有することを特徴とする。
好ましくは、前記弁体は、前記流路を閉じるときに前記弁座に押圧されるガス閉止面を有し、前記ガス閉止面は2μm~10μmの金メッキ層を有する。
好ましくは、前記金メッキ層は酸化処理が施されている。
好ましくは、前記不動態被膜は前記金メッキ層に形成されている。
好ましくは、前記弁体は、ディスク型である。
好ましくは、前記弁体は、ダイヤフラムである。
好ましくは、前記ガスにおける前記ClFの濃度は1重量%~100重量%である。
また、本発明のClFの保存方法は、ClFを含むガスを導入することでフッ化物の不動態被膜が内面に形成された保存容器に、ClFを充填して保存することを特徴とする。
また、本発明のClFの保存容器の使用方法は、ClFを含むガスを導入することでフッ化物の不動態被膜が内面に形成された保存容器の使用方法であって、前記保存容器の内部にClFを充填する充填工程と、前記充填工程後に、充填された前記ClFを前記保存容器から流出させて前記ClFを使用する使用工程と、前記使用工程後に、前記保存容器を真空引きにより減圧した後、前記保存容器に不活性ガスを充填するパージ工程とを含む。
図1は、本発明の一実施形態に係る材料を用いたガスボンベ2の一部断面図である。ガスボンベ2は、ClFを保存するための耐圧性を有する保存容器であって、上部に開口4を有する器壁6、開口4に装着された円筒状の口金8、口金8に装着されたバルブ10などを備えている。
・使用ガス:ClFのみ、或いは、ClFに、ClF3及びF2からなる群より選択される1つ以上をさらに含むガス(ベースガスとして、N2(窒素)、その他の不活性ガスを混合しても良い)
・使用ガスのClF濃度:1重量%~100重量%程度
・処理時間(使用ガスの接触時間):6時間以上
・処理温度:10℃~100℃程度
・処理圧力:0MPaG~0.1MPaG程度
ClFの濃度は、高い方が不動態被膜28を迅速に形成可能であるとともに、不動態被膜28の膜質が強固となる。また、処理時間は、長い方が不動態被膜28の膜質が強固となる。なお、接ガス時間とは、使用ガスが接ガスした瞬間からカウントされる時間である。
<充填工程:S1>
先ず、ステップS1では、不動態被膜28が形成された使用可能状態のガスボンベ2の内部にClFを含むガス(以下、単にClF、或いは保存ガスと称する)を充填して保存する。具体的には、バルブ10の開状態で、バルブ10の横接続部12bに図示しない保存ガス供給源を接続し、保存ガスをガスボンベ2に導入する。保存ガスの充填後には、バルブ10を閉として保存ガスをガスボンベ2内に密封保存する。
次に、ステップS2では、保存ガスが充填されたガスボンベ2を保存ガスの使用先まで搬送して使用する。具体的には、バルブ10の横接続部12bに図示しない保存ガス供給先を接続してバルブ10を開とし、保存ガスをガスボンベ2から流出させて保存ガス供給先に供給する。保存ガスの使用後には、バルブ10を閉としてガスボンベ2を使用先から回収する。
次に、ステップS3では、回収したガスボンベ2のバルブ10の横接続部12bに図示しないパージ装置を接続する。そして、パージ装置によりガスボンベ2を真空引きにより減圧しながらガスボンベ2内に微量に残留した保存ガスを排出した後、ガスボンベ2に不活性ガスを充填する。
<実験1>
バルブ10の弁体18を想定したテストピースに金メッキ層を形成し、表1に示すように、金メッキ層の層厚、金メッキ層に対する封孔処理、酸化処理の有無を変えることにより、これら変化がClFの耐久性に影響する度合いをテストピースの重量変化、表面腐食度、金メッキ層剥離の有無を指標として確認した。なお、表面腐食度は、テストピースの重量変化、表面積、実験時間から算出している。このため、金メッキ層の腐食によりテストピースの重量が減少した場合には負の値となる。また、ここでいう腐食とは、金メッキ層にフッ化物、或いは塩化物が形成されたり、或いは浸透したりし、その結果、金メッキ層が変色したり、或いは、金メッキ層が剥離する現象を含めて定義している。
・金メッキ層の層厚:7.3~8.4μm
・金メッキ層に対する封孔処理:無し
・金メッキ層に対する酸化処理:無し
となるテストピースに対してClFの圧張り試験を実施した結果、
・テストピースの重量変化:0.009%増加
・テストピースの表面腐食度:0.0014 mg/cm2・h
との結果を得て、最終的に
・テストピースからの金メッキ層の剥離:無し
となり、合格であった。
・金メッキ層の層厚:2.5~2.6μm
・金メッキ層に対する封孔処理:有り
・金メッキ層に対する酸化処理:無し
となるテストピースに対してClFの圧張り試験を実施した結果、
・テストピースの重量変化:0.002%増加
・テストピースの表面腐食度:0.0003 mg/cm2・h
との結果を得た。金メッキ層に封孔処理を施すことにより、実施例1の場合に比して、金メッキ層の層厚は約1/3に薄いものの、テストピースの重量変化、表面腐食度の双方とも約1/4に低減することができ、ClFによる金メッキ層の腐食を大幅に抑制することができた。従って、最終的に、
・テストピースからの金メッキ層の剥離:無し
となり、合格であった。
・金メッキ層の層厚:2.5~2.6μm
・金メッキ層に対する封孔処理:無し
・金メッキ層に対する酸化処理:有り
となるテストピースに対してClFの圧張り試験を実施した結果、
・テストピースの重量変化:0.014%増加
・テストピースの表面腐食度:0.0021 mg/cm2・h
との結果を得た。金メッキ層に酸化処理を施すことにより、実施例1の場合に比して、金メッキ層の層厚は約1/3に薄いものの、テストピースの重量変化、表面腐食度の双方とも約1.5倍に増加した。これは、金メッキ層の表面に酸化被膜が形成されたためであるが、この酸化被膜によりClFによる金メッキ層の腐食は抑制される。従って、最終的に、
・テストピースからの金メッキ層の剥離:無しとなり、
合格であった。
・金メッキ層の層厚:2.5~2.6μm
・金メッキ層に対する封孔処理:無し
・金メッキ層に対する酸化処理:無し
となるテストピースに対してClFの圧張り試験を実施した結果、
・テストピースの重量変化: 0.005%減少
・テストピースの表面腐食度:-0.0008 mg/cm2・h
との結果を得た。この場合、テストピースの重量は減少し、テストピースの表面腐食度は負の値となっているため、金メッキ層の腐食が進行している。そして、最終的に、
・テストピースからの金メッキ層の剥離:有り
となった。しかし、本例での金メッキ層の剥離は微量であり、後述する実験2でのリーク試験の結果、リークは発生しないことが判明したため、合格の判定を行った。
・金メッキ層の層厚:0.3μm
・金メッキ層に対する封孔処理:無し
・金メッキ層に対する酸化処理:無し
となるテストピースに対してClFの圧張り試験を実施した結果、
・テストピースの重量変化: 0.009%減少
・テストピースの表面腐食度:-0.0014 mg/cm2・h
との結果を得た。この場合、テストピースの重量は減少し、テストピースの表面腐食度は負の値となっているため、金メッキ層の腐食が進行している。そして、最終的に、
・テストピースからの金メッキ層の剥離:有り
となり、不合格であった。
ガスボンベ2にClFを充填し、図示しない実験用バルブを閉とした状態で、表2に示すように、バルブ10又はニードル弁を2000回開閉する実験を3回行った。その後、ガスボンベ2から実験用バルブを取り外し、ガスボンベ2からClFを排出した後、ガスボンベ2のサイクルパージを行った。その後、ガスボンベ2にHe(ヘリウム)を充填し、ガスボンベ2にHeリークディテクターを接続し、リークレートを測定した。
・弁体:ディスク型
・1回目リークレート:3.3×10-9Pa・m3/sec
・2回目リークレート:2.7×10-9Pa・m3/sec
・3回目リークレート:3.1×10-9Pa・m3/sec
との結果を得て、何れの測定も
・リーク:無し
となり、合格であった。
・弁体:ニードル型
・1回目リークレート:1.3×10-8Pa・m3/sec
・2回目リークレート:1.2×10-4Pa・m3/sec
・3回目リークレート:1.0×10-3Pa・m3/sec以上
との結果を得て、1回目の測定は
・リーク:無し
であり、2回目及び3回目の測定は、
・リーク:有り
となったため、最終的に不合格であった。
表3に示すように、テストピースにClFによる不動態化処理と、F2による不動態化処理とを以下の条件で実施したとき、不動態被膜の膜厚に差が見られるかどうかを測定した。
・使用ガスのClF濃度:1重量%~100重量%程度
・処理時間(使用ガスの接触時間):6時間以上
・処理温度:10℃~100℃程度
・処理圧力:0MPaG~0.1MPaG程度
テストピースに形成されたF2による不動態被膜の膜厚は8nmであり、同一条件での不動態化処理で、2倍の膜厚の不動態被膜が形成された。
このように実験3では、ClFによる不動態化処理により、より薄膜の不動態被膜を形成することができるため、例えば、バルブ10の弁体18、弁座16、ディスクパッキン24などに、摩擦の影響を受けにくく、バルブ10の閉止性能に極力影響を与えない薄膜の不動態被膜28を形成可能である。従って、ClFによる不動態化処理がClFの保存、取り扱いにおいて有効であることを確認することができた。
ガスボンベ2にClFを充填し、その後にガスボンベ2からClFを流出させてガスボンベ2の使用後の状態を形成する。バルブ10が閉の状態で、バルブ10の本体12の横接続部12bに図示しない実験用バルブ、図示しないパージ装置を順次接続する。そして、実験用バルブを開とし、パージ装置によりガスボンベ2を-0.1MPaGまで真空引きにより減圧保持(60秒)し、ガスボンベ2内に微量に残留したClFを排出した後、ガスボンベ2に窒素を充填する。
・サイクルパージ回数:100
・減圧保持時間:60秒
のときは、
・ClF検知:無し
であり、合格であった。
・サイクルパージ回数:50
・減圧保持時間:60秒
のときは、
・ClF検知:有り(2ppm以上)
であり、不合格であった。
・サイクルパージ回数:70
・減圧保持時間:60秒
のときは、
・ClF検知:有り(2ppm以上)
であり、不合格であった。
例えば、ガスボンベ2に限らず、種々の部材や装置の材料の少なくとも一部に不動態被膜28を形成すれば、当該材料に接触したClFのフッ化反応を少なくとも抑制可能である。
6a 内面
10 バルブ
14 流路
16 弁座
18 弁体
18a シール面
26 金メッキ層
28 不動態被膜
Claims (17)
- 少なくとも一部に、ClFを含むガスとの接触によるフッ化物の不動態被膜を有することを特徴とする材料。
- 前記不動態被膜は、5nm~50nmの膜厚を有することを特徴とする請求項1に記載の材料。
- 前記ガスは、ClF3及びF2からなる群より選択される1つ以上をさらに含むことを特徴とする請求項1又は2に記載の材料。
- マンガン鋼、ステンレス鋼、クロムモリブデン鋼、ニッケル合金、アルミニウム合金、コバルト合金、金、及び樹脂の少なくとも1つに前記不動態被膜を形成してなることを特徴とする請求項1から3の何れか一項に記載の材料。
- 請求項1から4の何れか一項に記載の材料からなり、前記不動態被膜が形成された内面を有することを特徴とする保存容器。
- 前記保存容器に取り付けられるバルブを備え、
前記バルブは、
前記ガスの流路と、
前記流路が開口された弁座と、
前記弁座に対し離接することで前記流路を開閉する弁体と
を有し、
前記流路と、前記弁座及び弁体の接ガス部とに前記不動態被膜が形成されていることを特徴とする請求項5に記載の保存容器。 - 前記弁体は、前記流路を閉じるときに前記弁座に押圧されるシール面を有し、
前記シール面は2μm~10μmの金メッキ層を有することを特徴とする請求項6に記載の保存容器。 - 前記金メッキ層は封孔処理が施されていることを特徴とする請求項7に記載の保存容器。
- 前記金メッキ層は酸化処理が施されていることを特徴とする請求項7又は8に記載の保存容器。
- 前記不動態被膜は前記金メッキ層に形成されていることを特徴とする請求項7から9の何れか一項に記載の保存容器。
- 前記弁体は、ディスク型であることを特徴とする請求項6から10の何れか一項に記載の保存容器。
- 前記弁体は、ダイヤフラムであることを特徴とする請求項6から10の何れか一項に記載の保存容器。
- 材料の表面に、ClFを含むガスを接触して前記材料のフッ化物による不動態被膜を形成することを特徴とする材料の製造方法。
- 前記ガスにおける前記ClFの濃度は1重量%~100重量%であることを特徴とする請求項13に記載の材料の製造方法。
- ClFを含むガスを導入することでフッ化物の不動態被膜が内面に形成された保存容器に、ClFを充填して保存することを特徴とするClFの保存方法。
- 前記保存容器に充填して保存するClFの濃度は、1重量%~100重量%であることを特徴とする請求項15に記載のClFの保存方法。
- ClFを含むガスを導入することでフッ化物の不動態被膜が内面に形成された保存容器の使用方法であって、
前記保存容器の内部にClFを充填して保存する充填工程と、
前記充填工程後に、充填された前記ClFを前記保存容器から流出させて使用する使用工程と、
前記使用工程後に、前記保存容器を真空引きにより減圧した後、前記保存容器に不活性ガスを充填するパージ工程と
を含むことを特徴とするClFの保存容器の使用方法。
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US16/089,717 US10982811B2 (en) | 2016-04-05 | 2017-03-16 | Material, storage container using the material, valve attached to the storage container, method of storing ClF and method of using ClF storage container |
EP17778941.9A EP3441499B1 (en) | 2016-04-05 | 2017-03-16 | Storage container for clf, valve installed in said storage container and method of manufacturing the same |
JP2018510288A JP6914918B2 (ja) | 2016-04-05 | 2017-03-16 | 材料、この材料を用いた保存容器、この保存容器に取り付けられるバルブ、並びに、ClFの保存方法、ClFの保存容器の使用方法 |
CN201780021008.8A CN108884548A (zh) | 2016-04-05 | 2017-03-16 | 材料、使用该材料的保存容器、安装于该保存容器的阀以及ClF的保存方法、ClF容器的使用方法 |
KR1020187031822A KR102322973B1 (ko) | 2016-04-05 | 2017-03-16 | 재료, 이 재료를 이용한 보존 용기, 이 보존 용기에 부착되는 밸브, 및 ClF의 보존 방법, ClF 보존 용기의 사용 방법 |
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WO2024127901A1 (ja) * | 2022-12-15 | 2024-06-20 | セントラル硝子株式会社 | 液化ガス入り容器および液化ガス入り容器の製造方法 |
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CN108884548A (zh) | 2018-11-23 |
KR20180132797A (ko) | 2018-12-12 |
TW201807218A (zh) | 2018-03-01 |
US20190113176A1 (en) | 2019-04-18 |
TWI786043B (zh) | 2022-12-11 |
US10982811B2 (en) | 2021-04-20 |
EP3441499C0 (en) | 2023-07-26 |
EP3441499A1 (en) | 2019-02-13 |
EP3441499A4 (en) | 2020-01-01 |
KR102322973B1 (ko) | 2021-11-08 |
JP6914918B2 (ja) | 2021-08-04 |
JPWO2017175562A1 (ja) | 2019-02-14 |
EP3441499B1 (en) | 2023-07-26 |
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