NO770224L - PROCEDURES FOR PRODUCING OBJECTS THAT ARE RESISTANT TO SURGAS - Google Patents
PROCEDURES FOR PRODUCING OBJECTS THAT ARE RESISTANT TO SURGASInfo
- Publication number
- NO770224L NO770224L NO770224A NO770224A NO770224L NO 770224 L NO770224 L NO 770224L NO 770224 A NO770224 A NO 770224A NO 770224 A NO770224 A NO 770224A NO 770224 L NO770224 L NO 770224L
- Authority
- NO
- Norway
- Prior art keywords
- corrosion
- resistant
- weight
- surgas
- procedures
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 5
- 230000007797 corrosion Effects 0.000 claims description 39
- 238000005260 corrosion Methods 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 2
- 229910000851 Alloy steel Inorganic materials 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 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 claims 1
- 229910052750 molybdenum Inorganic materials 0.000 claims 1
- 239000011733 molybdenum Substances 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 229910052758 niobium Inorganic materials 0.000 claims 1
- 239000010955 niobium Substances 0.000 claims 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 238000005336 cracking Methods 0.000 description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 8
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000003467 diminishing effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- YZCKVEUIGOORGS-UHFFFAOYSA-N Hydrogen atom Chemical compound [H] YZCKVEUIGOORGS-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000003113 alkalizing effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
Classifications
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
Description
Fremgangsmåte til fremstilling avMethod for the production of
gjenstander som er bestandig overfor surgass. objects that are resistant to acid gas.
Oppfinnelsen vedrører en fremgangsmåte til fremstilling av gjenstander, spesielt apparatdeler, rør og rørfor-bindelser av høylegert stål med minst 12 vekt% Cr, med høy fasthet og en strekkgrense på minst ^ hO N/mm<2>og som er bestandige overfor korrosjonsangrep av surgass. The invention relates to a method for the production of objects, especially apparatus parts, pipes and pipe connections of high-alloyed steel with at least 12% Cr by weight, with high strength and a tensile strength of at least ^ hO N/mm<2> and which are resistant to corrosion attack by acid gas.
Hittil ble det som material for transport, befordring og forarbeidelse av surgass (jordgass med innhold av f^S og/eller CO^) og surgassprodukter, f.eks. svovelforbindelser, anvendt ulegerte og lavtlegerte rørstål med vanlig varmebehandling. Felles for disse materialer er en under de nevnte anvendelsesbe-tingelser •■ U-tilstrekkelig korrosjonsbestandighet, eksempelvis Until now, it has been used as material for the transport, conveyance and processing of sour gas (natural gas containing f^S and/or CO^) and sour gas products, e.g. sulfur compounds, used unalloyed and low-alloyed tubular steel with normal heat treatment. These materials have in common an insufficient corrosion resistance under the aforementioned conditions of use, for example
en ikke tilstrekkelig bestandighet'overfor generelt avtagende korrosjon, tendens mot hullkorrosjon ved elementdannelse og fare for hydrogenindusert spenningsrisskorrosjon. De nevnte korro-sjonstyper kan opptre enkeltvis eller sammen. For å sikre en tilstrekkelig driftssikkerhet er det derfor ved anvendelse av ulegert og lavtlegert stål å treffe forskjellige forholdsregler, f.eks. tørkning av gassene og/eller tilsetning av inhibitorer og/eller heving av pH-verdien. an insufficient resistance to generally diminishing corrosion, a tendency towards pitting corrosion during element formation and the risk of hydrogen-induced stress corrosion cracking. The aforementioned types of corrosion can occur individually or together. In order to ensure sufficient operational safety, different precautions must therefore be taken when using unalloyed and low-alloyed steel, e.g. drying the gases and/or adding inhibitors and/or raising the pH value.
Ved befordring av surgass trues de nevnte materialer fortrinnsvis ved storflatede lokale korrosjoner. Disse korrosjoner iakttas på den ytre overflate av rør og er å se i forbind-else med innføring av midler som oppløser svovel eller hindrer utfelling av svovel i ringspalten mellom rør og hus. Grunnen til disse korrosjonsangrep er sannsynligvis dannelsen av storflatede makroelementer, hvis virkning øker med økende borehulldybde og dermed økende temperatur og under en bestemt, av de lokale om-stendigheter og driftsbetingelser avhengige temperatur resp. ikke mere å iaktta over en bestemt borehulldybde. When acid gas is transported, the aforementioned materials are threatened preferably by large-scale local corrosion. These corrosions are observed on the outer surface of pipes and can be seen in connection with the introduction of agents that dissolve sulfur or prevent the precipitation of sulfur in the annular gap between pipe and housing. The reason for these corrosion attacks is probably the formation of large-surfaced macro-elements, the effect of which increases with increasing borehole depth and thus increasing temperature and under a specific, depending on the local circumstances and operating conditions, temperature resp. no more to observe above a certain borehole depth.
Videre opptrer korrosjonsskader på den indre over flate av transportstrenger som forårsakes ved generelt avtagende korrosjon og erosjonskorrosjon. Den generelt avtagende korrosjon er åpenbart forbundet med syring av borehullet til opprettholdelse av transportytelsen. Ved anvendelsen av inhibitorer kan denne korrosjonstype riktignok nedsettes, men ikke tilstrekkelig sikkert unngås. I tillegg kan det ved forskjeller i strømningsforholdene opptre betingede lokale angrep ved erosjonskorrosjon. Disse er sannsynligvis å tilbakeføre på at dekk-sjikt som under drift oppstår og utøver en viss beskyttelses-funksjon i bestemte områder av røroverflaten ikke danner seg eller ødelegges. Furthermore, corrosion damage occurs on the inner surface of transport strings which is caused by generally decreasing corrosion and erosion corrosion. The generally decreasing corrosion is obviously associated with acidification of the borehole to maintain transport performance. By using inhibitors, this type of corrosion can indeed be reduced, but cannot be avoided with sufficient certainty. In addition, due to differences in the flow conditions, conditional local attacks can occur due to erosion corrosion. These are probably due to the fact that the cover layer which occurs during operation and exerts a certain protective function in certain areas of the pipe surface is not formed or destroyed.
I den øvre, kaldere rørstrengdel består spesielt ved stillstand av befordring faren for en ved hydrogen forår-saket spenningsrisskorrosjon. Opptreden av denne korrosjonstype er å tilbakeføre på at materialoverflaten rekombinerer ved korrosjonsreaksjonen dannet hydrogen ved nærvær av svovelhydro-gen ikke til hydrogenmolekylet, men indiffunderer atomært i strukturen. Dette kan ved belastning langt under strekkgrens en føre til rissdannelse, brudd og dermed til avrivning av rør-strengen. Tendensen av ulegert og lavtlegert stål til hydrogenindusert spenningsrisskorrosjon øker med fallende temperatur og oppnår en maksimal verdi ved omtrent værelsestemperatur. Derved forklares den spesielle truing av de øvre, kaldere og samtidig også høytbelastede deler av strengen under befordringsdriften og den utover dette økede fare i stillstandstider på grunn av den der videre fallende temperatur. Som motforholdsregel er det hittil blitt anvendt høyfaste, lavtlegerte foredlingsstål med sammenlignet til varmvalset eller varmvalset og normalisert stål forbedret bestandighet mot hydrogenindusert spenningsrisskorrosjon uten at imidlertid korrosjonsskader fullstendig kunne unngås . In the upper, colder part of the pipe string, there is a risk of stress corrosion cracking caused by hydrogen, especially when transport is at a standstill. The occurrence of this type of corrosion is due to the fact that the material surface recombines the hydrogen formed by the corrosion reaction in the presence of hydrogen sulphide, not into the hydrogen molecule, but atomically indiffuses in the structure. When the load is far below the tensile limit, this can lead to cracking, breakage and thus tearing of the pipe string. The tendency of unalloyed and low-alloyed steel to hydrogen-induced stress corrosion cracking increases with decreasing temperature and reaches a maximum value at approximately room temperature. This explains the special threat posed by the upper, colder and at the same time highly loaded parts of the string during the transport operation and the increased danger during periods of standstill due to the further falling temperature there. As a countermeasure, high-strength, low-alloy finishing steels have been used until now, with improved resistance to hydrogen-induced stress corrosion cracking compared to hot-rolled or hot-rolled and normalized steel, without, however, corrosion damage being completely avoided.
Rør for transport av surgass, såkalt "flow-lines" er på grunn av den her foreliggende lave temperatur omtrent utelukkende truet av hydrogenindusert spenningsrisskorrosjon, mens generell avtagende korrosjon og andre lokale korrosjonsangrep ikke har noen praktisk betydning ved dette anvendelsestil-fellet. Da den ved hydrogenabsorpsjon forårsakede spenningsriss-korros jon er bundet til en elektrokjemisk korrosjonsreaksjon, som kan forløpe ved lave pH-verdier og bare ved nærvær av fuktighet, ble det hittil for unngåelse av spenningsrisskorrosjon med en gang etter uttreden av gassen fra boringen pH-verdien hevet ved tilsetning av alkali til pH lik eller over 8 og deretter fjernet fuktighet i et tørkeanlegg. Pipes for the transport of sour gas, so-called "flow-lines", are almost exclusively threatened by hydrogen-induced stress corrosion cracking due to the low temperature present here, while general diminishing corrosion and other local corrosion attacks have no practical significance in this application case. As the stress-cracking corrosion caused by hydrogen absorption is linked to an electrochemical corrosion reaction, which can proceed at low pH values and only in the presence of moisture, to avoid stress-cracking corrosion immediately after the exit of the gas from the borehole, the pH value raised by addition of alkali to pH equal to or above 8 and then removed moisture in a drying plant.
De samme korrosjonsproblemer består ved befordring og transport også ved anlegg for oppberedning og videreforarbeidelse av surgass. The same corrosion problems exist during transport and also at facilities for the preparation and further processing of acid gas.
Til grunn for oppfinnelsen ligger den oppgave å muliggjøre fremstilling av gjenstander som er anvendbare for oppslutning, transport og videreforarbeidelse av surgass uten at de angjeldende gjenstander er korrosjonstruet. Por løsning av denne oppgave foreslås ifølge oppfinnelsen at gjenstandene ved deres fremstilling er blitt kaldformet med en formningsgrad på minst 3%. The invention is based on the task of enabling the manufacture of objects that can be used for the digestion, transport and further processing of sour gas without the objects in question being at risk of corrosion. In order to solve this problem, according to the invention, it is proposed that the objects during their manufacture have been cold-formed with a forming degree of at least 3%.
Gjenstanden ifølge oppfinnelsen har på grunn av deres kjemiske sammensetning under betingelsene for oppslutning av surgassboringer, befordring, transport, opparbeidelse og videreforarbeidelse av surgass en høy bestandighet mot generelt avtagende korrosjon, lokale korrosjoner som hullkorrosjon og ved klorider såvel som spesielt mot ved hydrogenabsorpsjon for-årsaket spenningsrisskorrosjon. De er dessuten bestandige overfor korrosjoner frembragt ved elementdannelse. The object according to the invention has, due to its chemical composition, under the conditions for the plugging of acid gas wells, conveyance, transport, processing and further processing of acid gas, a high resistance to generally diminishing corrosion, local corrosion such as pitting corrosion and by chlorides as well as especially against hydrogen absorption caused by stress corrosion cracking. They are also resistant to corrosion caused by element formation.
Ved kaldformningen av- materialene ifølge oppfinnelsen økes de i den oppløsningsglødede tilstand foreliggende'minste-strekkgrenser av det høylegerte stål vesentlig inntil den for rørutlegning ved store dyp nødvendige verdi samtidig tilstrekkelig høye verdier for utvidelse og innsnevring. Det er vesentlig ifølge oppfinnelsen at ved kaldformningen påvirkes ikke bestandigheten mot generelt avtagende korrosjon mot hullkorrosjon ved klorider og inntrengning av atomært hydrogen i strukturen frembragt spenningsrisskorrosjon og bestandigheten mot korrosjon og elementdannelse. Videre kan de hittil anvendte for en sikker beskyttelse av ulegerte og lavtlegerte stål vanligvis imidlertid utilstrekkelig korrosjonsbeskyttelsesforholdsregler bortfalle eller i det minste begrenses, som anvendelse av inhibitorer ved spyling og syring av borehull, alkalisering og tørkning av gassen og derved økes anleggenes driftssikkerhet og det oppnås en økonomisk fordel. During the cold forming of the materials according to the invention, the 'minimum tensile limits' of the high-alloyed steel present in the solution-annealed state are substantially increased up to the value necessary for pipe laying at great depths, at the same time sufficiently high values for expansion and contraction. It is essential according to the invention that during the cold forming, the resistance against generally decreasing corrosion against pitting corrosion caused by chlorides and penetration of atomic hydrogen into the structure is not affected by stress crack corrosion and the resistance against corrosion and element formation. Furthermore, the corrosion protection precautions used until now for safe protection of unalloyed and low-alloyed steels, usually however insufficient, can be dispensed with or at least limited, such as the use of inhibitors when flushing and acidizing boreholes, alkalizing and drying the gas, thereby increasing the plant's operational reliability and achieving a financial benefit.
a a
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2616599A DE2616599B2 (en) | 1976-04-13 | 1976-04-13 | Use of a high-alloy steel for the manufacture of high-strength objects that are resistant to acid gas corrosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO770224L true NO770224L (en) | 1977-10-14 |
| NO147217B NO147217B (en) | 1982-11-15 |
Family
ID=5975454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO770224A NO147217B (en) | 1976-04-13 | 1977-01-24 | APPLICATION OF A HIGH-ALLOY STEEL CONTAINING AT LEAST 12% CHROME FOR THE PREPARATION OF GOODS WHICH ARE RESISTANT TO ACID GAS |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS52124411A (en) |
| AR (1) | AR211954A1 (en) |
| AT (1) | ATA903976A (en) |
| BE (1) | BE853481A (en) |
| BR (1) | BR7702279A (en) |
| CS (1) | CS215084B2 (en) |
| DE (1) | DE2616599B2 (en) |
| FR (1) | FR2348275A1 (en) |
| GB (1) | GB1577783A (en) |
| IT (1) | IT1084471B (en) |
| MX (1) | MX149365A (en) |
| NL (1) | NL7613619A (en) |
| NO (1) | NO147217B (en) |
| SE (1) | SE437383B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53131397A (en) * | 1977-04-22 | 1978-11-16 | Toshiba Corp | Nuclear fuel element |
| AT371840B (en) * | 1978-05-31 | 1983-08-10 | Voest Ag | METHOD FOR PRODUCING ANCHOR BARS OR ANCHOR WIRE |
| JPS5681658A (en) | 1979-12-05 | 1981-07-03 | Nippon Kokan Kk <Nkk> | Austenitic alloy pipe with superior hot steam oxidation resistance |
| SE436576C (en) * | 1980-01-03 | 1986-12-23 | Allegheny Ludlum Steel | FERRITIC STAINLESS STEEL AND APPLICATION OF CAP |
| GB2128632A (en) * | 1982-10-23 | 1984-05-02 | Mather & Platt Ltd | Stainless steel |
| JPS6036649A (en) * | 1983-08-05 | 1985-02-25 | Nisshin Steel Co Ltd | Precipitation hardening martensitic stainless steel with superior toughness |
| US4816085A (en) * | 1987-08-14 | 1989-03-28 | Haynes International, Inc. | Tough weldable duplex stainless steel wire |
| FR2623390B1 (en) * | 1987-11-23 | 1994-03-25 | Fabrication Materiel Orthopediqu | DEVICE FOR SHRINKAGE OF SPINE VERTEBRA |
| US4915752A (en) * | 1988-09-13 | 1990-04-10 | Carondelet Foundry Company | Corrosion resistant alloy |
| FR2645732B1 (en) * | 1989-04-13 | 1997-01-03 | Cotrel Yves | VERTEBRAL IMPLANT FOR OSTEOSYNTHESIS DEVICE |
| JPH0726180B2 (en) * | 1990-07-30 | 1995-03-22 | 日本鋼管株式会社 | Martensitic stainless steel for oil wells with excellent corrosion resistance |
| JP3543366B2 (en) * | 1994-06-28 | 2004-07-14 | 住友金属工業株式会社 | Austenitic heat-resistant steel with good high-temperature strength |
| IT1275287B (en) * | 1995-05-31 | 1997-08-05 | Dalmine Spa | SUPERMARTENSITIC STAINLESS STEEL WITH HIGH MECHANICAL AND CORROSION RESISTANCE AND RELATED MANUFACTURED PRODUCTS |
| FR2746114B1 (en) * | 1996-03-15 | 1998-04-24 | PROCESS FOR PRODUCING FERRITIC STAINLESS STEEL HAVING IMPROVED CORROSION RESISTANCE, IN PARTICULAR INTERGRANULAR AND PITCH CORROSION RESISTANCE | |
| JP2002241900A (en) * | 1997-08-13 | 2002-08-28 | Sumitomo Metal Ind Ltd | Austenitic stainless steel having excellent sulfuric acid corrosion resistance and workability |
| JP3294282B2 (en) * | 1998-08-10 | 2002-06-24 | 住友金属工業株式会社 | Austenitic stainless steel with excellent sulfuric acid corrosion resistance and workability |
| WO2007129703A1 (en) | 2006-05-09 | 2007-11-15 | Nippon Steel & Sumikin Stainless Steel Corporation | Stainless steel excellent in corrosion resistance, ferritic stainless steel excellent in crevice corrosion resistance and formability, and ferritic stainless steel excellent in crevice corrosion resistance |
| ES2719774T3 (en) * | 2011-09-06 | 2019-07-16 | Nippon Steel Corp | Two-phase stainless steel |
| CN109554633B (en) * | 2018-12-25 | 2020-04-10 | 成都永益泵业股份有限公司 | Corrosion-resistant material and preparation method of phosphoric acid slurry pump |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1171941B (en) * | 1956-08-09 | 1964-06-11 | Flexonics Corp | Method and device for work hardening circular cylindrical tubes made of a metal that hardens during cold stretching, in particular made of stainless steel |
| BE671790A (en) * | 1963-11-04 | |||
| FR2045584A1 (en) * | 1969-06-03 | 1971-03-05 | Ugine Kuhlmann | |
| AT298379B (en) * | 1970-06-22 | 1972-05-10 | Schoeller Bleckmann Stahlwerke | Process for the production of seamless tubes |
| NO131944C (en) * | 1970-12-28 | 1975-08-27 | Kobe Steel Ltd | |
| GB1388431A (en) * | 1972-03-06 | 1975-03-26 | Jackson R G | Process of working a metal tube |
| FR2194195A5 (en) * | 1972-07-28 | 1974-02-22 | Creusot Loire |
-
1976
- 1976-04-13 DE DE2616599A patent/DE2616599B2/en active Granted
- 1976-12-07 AT AT903976A patent/ATA903976A/en not_active Application Discontinuation
- 1976-12-08 NL NL7613619A patent/NL7613619A/en not_active Application Discontinuation
-
1977
- 1977-01-24 NO NO770224A patent/NO147217B/en unknown
- 1977-02-03 SE SE7701171A patent/SE437383B/en not_active IP Right Cessation
- 1977-02-08 GB GB5163/77A patent/GB1577783A/en not_active Expired
- 1977-02-10 JP JP1404777A patent/JPS52124411A/en active Pending
- 1977-03-01 FR FR7705902A patent/FR2348275A1/en active Granted
- 1977-03-18 AR AR266902A patent/AR211954A1/en active
- 1977-03-18 CS CS771816A patent/CS215084B2/en unknown
- 1977-03-31 MX MX168588A patent/MX149365A/en unknown
- 1977-04-07 IT IT22263/77A patent/IT1084471B/en active
- 1977-04-12 BE BE176610A patent/BE853481A/en not_active IP Right Cessation
- 1977-04-12 BR BR7702279A patent/BR7702279A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2348275A1 (en) | 1977-11-10 |
| CS215084B2 (en) | 1982-07-30 |
| DE2616599A1 (en) | 1977-10-27 |
| BR7702279A (en) | 1977-12-13 |
| NL7613619A (en) | 1977-10-17 |
| NO147217B (en) | 1982-11-15 |
| DE2616599C3 (en) | 1987-01-22 |
| DE2616599B2 (en) | 1981-03-26 |
| MX149365A (en) | 1983-10-28 |
| IT1084471B (en) | 1985-05-25 |
| AR211954A1 (en) | 1978-04-14 |
| JPS52124411A (en) | 1977-10-19 |
| ATA903976A (en) | 1981-01-15 |
| FR2348275B1 (en) | 1983-11-18 |
| GB1577783A (en) | 1980-10-29 |
| BE853481A (en) | 1977-08-01 |
| SE437383B (en) | 1985-02-25 |
| SE7701171L (en) | 1977-10-14 |
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