Qhov sib txawv ntawm Inconel 600 alloy tubing thiab 690 nickel alloy tubing
Qhov sib txawv ntawm Inconel 600 alloy tubing thiab 690 nickel alloy tubing
Ob leeg Inconel 600 thiab 690 raj yog npib tsib xee-chromium alloy tubes, tab sis cov ntsiab lus chromium ntawm Inconel 690 alloy tubes (kwv yees li 30%) yog qhov siab dua li ntawm Inconel 600 alloy tubes (kwv yees li 14-17%). Qhov no ua rau 690 alloy tubes ua tau zoo dua nyob rau hauv ib puag ncig corrosive, tshwj xeeb tshaj yog cov tshuaj caustic thiab acids. Vim li no, hauv cov tshuab hluav taws xob nuclear, 690 alloy tubes tau hloov pauv 600 alloy raj rau kev tiv thaiv kev ntxhov siab corrosion tawg (SCC). Txawm hais tias 600 alloy tubes muaj qhov kub thiab txias zog thiab oxidation tsis kam, siab dua chromium cov ntsiab lus ntawm 690 alloy tubes muab lawv superior corrosion kuj. Txawm li cas los xij, vim muaj kev coj cwj pwm sib txawv, 600 cov hlab ntsha tuaj yeem ua tau zoo dua nyob rau hauv qee qhov kev mob alkaline.
Dab tsi yog daim ntawv thov ntawm INCONEL 690 alloy?
Nyob rau hauv ntau yam siab -kub dej, 690 alloy qhia qhov qis corrosion thiab zoo heev tiv thaiv kev ntxhov siab corrosion cracking. Yog li ntawd, 690 alloy yog dav siv nyob rau hauv chav generator raj, baffles, raj ntawv, thiab ntau yam khoom siv kho vajtse hauv nuclear fais fab nroj tsuag.
Inconel 600 tubing yog lub siab -kev ua tau zoo yeeb nkab ua los ntawm nickel-chromium- hlau alloy (Inconel 600), tshwj xeeb tsim los rau kev thauj cov xov xwm nyob rau hauv siab heev- kub thiab corrosive ib puag ncig (xws li chlorides, alkalis, thiab ntau yam 1.1℃acidic) Nrog nws zoo heev - kub lub zog, oxidation tsis kam, thiab tsis kam mus rau kev nyuaj siab corrosion cracking, nws yog dav siv nyob rau hauv cov chaw tseem ceeb xws li nuclear fais fab nroj tsuag chav generators, petrochemical cracking furnaces, cov khoom siv kho cua sov, thiab cov txheej txheem tshuaj. Nws yog ib qho kev txhim khu kev qha thaum stainless hlau tsis txaus, tab sis ntawm tus nqi siab dua.
Inconel 690 tubing yog ib hom tshwj xeeb ntawm tubing ua los ntawm siab -chromium nickel-raws li alloy (Inconel 690). Nws lub ntsiab kom zoo dua yog nyob rau hauv nws superior tsis kam mus rau siab - kub, siab - dej xov xwm, tshwj xeeb tshaj yog kev nyuaj siab corrosion cracking. Los ntawm kev nce cov ntsiab lus chromium mus rau kwv yees li 29%, nws ua tau zoo heev nyob rau hauv qhov chaw muaj corrosive xws li lub tshuab hluav taws xob hluav taws xob hloov hluav taws xob hauv cov hluav taws xob hluav taws xob hauv lub tshuab hluav taws xob hluav taws xob, siv roj rov ua dua tshiab, thiab siab -concentration caustic alkalis (xws li sodium hydroxide). Nws yog cov khoom siv tseem ceeb rau kev ua kom muaj kev nyab xeeb ntawm nuclear thiab kev ntseeg siab ntawm cov txheej txheem tshuaj, muab kev ua tau zoo dua piv rau alloy 600 hauv cov xov xwm tshwj xeeb, tab sis ntawm tus nqi siab dua.
Qhov sib txawv tseem ceeb ntawm Inconel 600 thiab Inconel 690 kav
Cov tshuaj muaj pes tsawg leeg ntawm Inconel 600 thiab Inconel 690 kav:
| Element | Inconel 600 Tube (ASTM B167 / B163) | Inconel 690 Tube (ASTM B167 / B163) |
|---|---|---|
| Nickel (Ni) | Ntau dua lossis sib npaug li 72.0% | Ntau dua lossis sib npaug li 58.0% |
| Chromium (Cr) | 14.0 - 17.0 % | 27.0 - 31.0 % |
| Hlau (Fe) | 6.0 - 10.0 % | 7.0 - 11.0 % |
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.15% | Tsawg dua lossis sib npaug li 0.05% |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.00% | Tsawg dua lossis sib npaug li 0.50% |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.50% | Tsawg dua lossis sib npaug li 0.50% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.015% | Tsawg dua lossis sib npaug li 0.015% |
| Copper (Cu) | Tsawg dua lossis sib npaug li 0.50% | Tsawg dua lossis sib npaug li 0.50% |
| Aluminium (Al) | – | Tsawg dua lossis sib npaug li 0.50% |
| Titanium (Ti) | – | Tsawg dua lossis sib npaug li 0.50% |
| Cobalt (zeeg) | – | Tsawg dua lossis sib npaug li 0.10% |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.015% | – |
Tom ntej: Inconel 600Siab nickel (min 72%), qis Chromium (14-17%).
Inconel 690: xyuas.Tsawg Nickel (min 58%), ntau dua Chromium (txog 31%).
Corrosion kuj ntawm Inconel 600 thiab Inconel 690 kav
| Ib puag ncig / Corrosion Hom | Inconel 600 Tube | Inconel 690 Tube |
|---|---|---|
| Txoj Cai | Zoo dav dav corrosion kuj nyob rau hauv siab -kub oxidizing thiab alkaline ib puag ncig. | Kev tiv thaiv zoo heev tshwj xeeb rau oxidizing thiab siab -kub aqueous ib puag ncig, tshwj xeeb tshaj yog qhov kev ntxhov siab corrosion tawg yog qhov txaus ntshai. |
| Chloride Stress Corrosion Cracking (Cl-SCC) | Raug mob.Ua rau tsis ua hauj lwm nyob rau hauv kub, concentrated chloride daws. Tsis pom zoo rau cov dej hiav txwv lossis siab - cov txheej txheem chloride. | Zoo heev Resistance.Siab tiv taus vim nws cov ntsiab lus chromium siab (~ 30%). Ib qho laj thawj tseem ceeb rau nws txoj kev loj hlob thiab siv. |
| Caustic Cracking & Corrosion | Zoo heev.Muaj zog tiv taus kub concentrated caustic (NaOH, KOH) thiab molten hydroxides. Ib daim ntawv thov thawj. | Zoo heev rau Superior.Txawm tias muaj kev tiv thaiv ntau dua li Inconel 600 nyob rau hauv ib puag ncig caustic hnyav, tshwj xeeb tshaj yog nyob rau hauv kev ntxhov siab. |
| Siab -Tswv Dej & Chav Dej | Kev tiv thaiv zoo, tab sis keeb kwm pom tias muaj kev cuam tshuam rauintergranular stress corrosion cracking (IGSCC)nyob rau hauv oxygenated siab - dej purity (piv txwv li, nuclear steam generators). | Superior / Kev lag luam Standard.Tshwj xeeb tsim los hloov cov hlau 600 hauv cov tshuab hluav taws xob nuclear. Exceptional kuj rau IGSCC thiab dav corrosion nyob rau hauv siab - kub, siab - dej purity. |
| Oxidizing Acids | Kev tiv thaiv zoo rau nitric acid (HNO₃) ntawm qhov nruab nrab thiab qhov kub thiab txias. | Zoo heev.Superior tsis kam rau nitric, nitrous, thiab lwm yam oxidizing acids vim nws cov ntsiab lus chromium siab. |
| Sulfuric Acid | Tsis zoo rau nruab nrab kuj, nyob ntawm qhov concentration thiab kub. | Kev ua haujlwm zoo dua li 600 hauv ntau cov sulfuric acid concentrations, tshwj xeeb tshaj yog thaum muaj oxidizing impurities. |
| Phosphoric Acid | Nruab nrab kuj. | Zoo rau kev ua haujlwm zoo, zoo tshaj 600 hauv ntau yam mob. |
| High -Tub kub oxidation | Zoo heev.Lub zog tseem ceeb. Zoo heev oxidation tsis kam mus txog ~ 1175℃vim Cr₂O₃ nplai tsim. | Zoo heev.Zoo sib xws los yog me ntsis oxidation kuj zoo dua 600 ntawm qhov kub siab heev vim muaj cov ntsiab lus chromium ntau dua. |
Tom ntej: Inconel 600Zoo rau siab -temp oxidation, carburizing, thiab chloride ib puag ncig.
Inconel 690: xyuas.Kev tiv thaiv zoo heev rau ntau cov oxidizing acids (xws li nitric, hydrofluoric) thiab ntsev vim yog siab Cr.
Stress Corrosion Cracking (SCC):
Tom ntej: Inconel 600Txaus siab rau SCC hauv qee qhov chaw (xws li siab - dej kub nrog caustic), ua rau nws hloov los ntawm 690.
Inconel 690: xyuas.Feem ntau superior SCC tsis kam, tshwj xeeb tshaj yog nyob rau hauv kev siv nuclear.
Daim ntawv thov sib piv: Inconel 600 Tube vs. Inconel 690 Tube
| Kev lag luam / Daim Ntawv Thov Cheeb Tsam | Inconel 600 Tube | Inconel 690 Tube |
|---|---|---|
| Core Application Principple | Xaiv rausiab -kub oxidation kuj, dav corrosion kuj, thiab stability nyob rau hauv uas tsis yog - aqueous, siab - kub ib puag ncig. | Xaiv tshwj xeeb rausuperior tsis kam rau kev ntxhov siab corrosion cracking thiab dav corrosion nyob rau hauv siab -kub aqueous thiab oxidizing tshuaj ib puag ncig. |
| Nuclear Power Generation | Keeb kwm siv nyob rau hauv chav generators thiab reactor internals, tab sis feem ntau phased tawm vim susceptibility to stress corrosion cracking. | Niaj hnub Standard. Chav generator tubing, reactor hlab ntsha internals, thiab nuclear pov tseg cov khoom siv.Qhov kev hloov pauv tseem ceeb rau Alloy 600 hauv PWRs vim nws qhov pov thawj tsis kam rau thawj qhov kev ntxhov siab corrosion tawg. |
| Tshuaj & Petrochemical | Rauv radiant raj, cua kub exchanger tubing (rau kev pab huv), thiab cov khoom siv rau caustic (NaOH) ntau lawm. | Thaum tshav kub kub exchanger thiab condenser tubingrau txhoj puab heev oxidizing acids (xws li, nitric acid, sib xyaw acids) thiab hnyav caustic ib puag ncig. |
| Thermal processing & Thaum tshav kub kub kho | Kev siv thawj zaug.Muffles, retorts, radiant tubes, thiab pob tawb rau siab -kub qhov cub (txog 1175℃). | Siv nyob rau hauv tshwj xeeb siab -kub tshuaj ua rauv qhov twg muaj ob qho tib si tshav kub thiab txhoj puab heev oxidizing atmospheres. |
| Khib nyiab Incineration & Processing | Incinerator tshav kub rov qab raj thiab superheaters. | Siab -theem nuclear pov tseg vitrification systems, tawm -pas systems, thiab cov khib nyiab loj incineration heat exchangersqhov twg caustic thiab oxidizing corrosion yog kev txhawj xeeb. |
Tom ntej: Inconel 600General high -temp, corrosive siv; kev lag luam tshuaj.
Inconel 690: xyuas.Nuclear steam generators, pickling operations, nuclear fuel reprocessing, marine applications.
Hauv cov ntsiab lus:
Inconel 690 tubing tuaj yeem suav tias yog qhov hloov kho dua tshiab ntawm 600 tubing, nrog cov ntsiab lus chromium nce ntxiv, yog li txhim kho nws qhov kev tiv thaiv rau qhov hnyav thiab oxidizing ib puag ncig. Tshwj xeeb, nws kov yeej qhov teeb meem kev ntxhov siab corrosion (SCC) qhov teeb meem tam sim no nyob rau hauv alloy 600 tubing, ua rau nws yog ib qho kev xaiv zoo tshaj plaws rau kev thov rau kev thov siv hluav taws xob thiab tshuaj lom neeg.
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