Vim li cas 316L shafts tawg tsis taunickel{0}}molybdenum pas nrigkawg?
Lub hli tas los, kuv tau mus rau lub Hoobkas nruab nrab ntawm cov tshuaj tua kab rau kev rov mus ntsib. Tus thawj coj ntawm lub rooj cob qhia tau coj kuv mus rau lub hwj chim tshuaj tiv thaiv, taw rau lub ci ntsa iab thiab tshiab nplawm thiab hais tias: "Saib lub ncej no, uas tau teeb tsa rau xyoo 2019. Tam sim no lub ntsej muag tseem zoo li tshiab. yav dhau los, thaum kuv siv 316L, cov kab nrib pleb tshwm sim nyob rau hauv nruab nrab ntawm ob thiab ib nrab xyoo, thiab kuv poob ntau tshaj 150,000 ntau lawm thiab hloov thaum kuv hloov yuan. Kuv squatted thiab saib kom zoo. Tsis muaj pitting corrosion los yog qaug zog tawg ntawm tag nrho lub cev ncej-qhov no yog lub zog tiag tiag ntawm nickel-molybdenum pas nrig (B-3 qib) nyob rau hauv siab concentration hydrochloric acid + organic solvent.
Cia kuv piav qhia ua ntej vim li cas lub dov ncej yog yooj yim heev rau "hloov"
Lub stirring ncej nyob rau hauv cov tshuaj reactor tsis zoo li qub, nws yuav tsum tig ntawm ib tug ceev ceev rau 24 teev, thiab nyob rau tib lub sij hawm, nws yog soaked nyob rau hauv ib tug nruab nrab ntawm high concentration hydrochloric acid, sulfuric acid los yog phosphoric acid . 316L stainless hlau yuav ntsib ob tug tuag taus nyob rau tib lub sij hawm nyob rau hauv cov kev ua hauj lwm mob:
1. Cov zaj duab xis passive nyob rau saum npoo yog tas li "noj" los ntawm kev txo cov kua qaub, thiab pitting corrosion tshwm sim hauv zos.
2. Kev sib hloov kev ntxhov siab tshwm sim los ntawm kev sib hloov ua rau cov pits sai sai ua micro- tawg, uas nws thiaj li ua rau muaj kev ntxhov siab corrosion cracking (SCC).
Qhov tshwm sim yog: lub cev ncej dheev tsoo hauv lub lauj kaub nrog "snap", tsis yog cov khoom raug muab pov tseg, tab sis kuj tseem yuav tsum tau muab tshem tawm kom tshem tawm cov slag, thiab cov khoom raug txiav tawm rau 3-5 hnub. Ntau lub tsev lag luam poob ntau lab ntawm cov khoom seem thiab kaw ntawm qhov sib xyaw ua ke hauv ib xyoos.
Nickel molybdenum rods yog txawv kiag li. Nws cov alloy muaj pes tsawg leeg (Ni Ntau dua lossis sib npaug li 65%, Mo 26-30%, tsis tshua muaj Cr) tso cai rau nws los tsim ib txheej ntawm * * ntom thiab ruaj khov molybdenum oxide zaj duab xis * * hauv kev txo cov kua qaub, khaws cov tshuaj chloride ions thiab hydrogen ions khov kho. Raws li cov ntaub ntawv taug qab ntawm cov kev ua haujlwm tiag tiag, nyob rau hauv qhov kub ntawm 37% hydrochloric acid organic hnyav, tus nqi corrosion tuaj yeem tswj tau ruaj khov ntawm 0.05-0.08 hli / xyoo-qhov no tsis yog "corrosion resistance", tab sis ze rau "kev tiv thaiv".
Qhov tseem ceeb tshaj, nws qhov siab - qhov kub thiab txias zog thiab elongation (elongation tseem ntau dua lossis sib npaug li 40% ntawm 400-600℃) ua kom zoo dua qhov qaug zog ntawm cov ncej thaum tig, thiab yuav tsis nrawm nrawm rau hauv cov kab nrib pleb vim yog qhov me me corrosion. Yooj yim muab tso, nws tuav ob tus neeg tua neeg ntawm "corrosion qaug zog" tib lub sijhawm.
Nws yog siv li no hauv tej yaam num tiag
-Pesticide/dye reaction kettle stirring ncej: Qhov nruab nrab yog concentrated hydrochloric acid chloride organic teeb meem. Yav dhau los, 316L ncej tau hloov hauv qhov nruab nrab ntawm 28 lub hlis, tab sis tam sim no nws tau hloov nrog npib tsib xee- molybdenum rods nrog txoj kab uas hla ntawm 60-80mm. Qee cov tuam txhab lag luam tau khiav 6 xyoo sib law liag yam tsis muaj kev hloov pauv.
-Phosphoric acid concentrator twj tso kua mis ncej: siab- kub thiab siab -concentration phosphoric acid, zoo tib yam stainless hlau xau nyob rau hauv peb lub hlis, npib tsib xee- molybdenum rods ncaj qha stretch lub txij nkawm mus rau ntau tshaj ob xyoos.
-Hydrochloric acid xa lub twj tso kua mis ncej hauv chlor-alkali nroj tsuag: kev kub ceev thiab muaj zog acid yaig, anti- abrasion peev xwm ntawm npib tsib xee- molybdenum pas nrig ua rau lub sealing nto ib txwm nyob rau hauv zoo, thiab tus nqi to yog yuav luag xoom.
-High-purity tshuaj tiv thaiv kettle rau kev lag luam tshuaj lom neeg zoo: xoom hlau ion ua paug yuav tsum tau, thiab siab -purity yam ntxwv ntawm npib tsib xee- molybdenum rods ua tau raws li qhov xav tau ntawm kev tsim tshuaj intermediates.
Qhov tsis zoo tshaj plaws uas kuv tau pom dua: cov tshuaj hydrochloric acid sib xyaw ntawm cov tshuaj chlorination yuav tsum tau hloov tag nrho txhua 8 lub hlis; Tom qab hloov nrog npib tsib xee- molybdenum rods ib zaug hauv 2020, lawv tseem ua haujlwm ib txwm mus txog rau lub Plaub Hlis 2026. Tsuas yog ob qho kev soj ntsuam niaj hnub tau ua tiav ntawm qhov chaw, thiab cov nqi txuag tau rov qab ntau zaus ntawm cov khoom siv.
Ob lub qhov taub uas yooj yim rau kauj ruam thaum xaiv cov khoom
1. Tsis txhob sib tov muaj zog oxidizers hauv nruab nrab
Nickel-molybdenum rods ntshai tshaj plaws ntawm cov concentration ntawm nitric acid los yog oxidizing xov xwm uas muaj ntau ntawm Fe ³ As thiab Cu ² Thaum lawv nkag mus, molybdenum zaj duab xis yuav raug kaw, thiab qhov zoo dua yuav ploj tam sim ntawd. Hauv qhov no, nws raug nquahu kom mus ncaj qha rau C-276.
2. Kev ua haujlwm thiab kev teeb tsa
Txawm hais tias qhov kev ua tau zoo ntawm cov B-3 cov pa roj carbon tsawg yog qhov zoo heev, lub nplawm ncej yog qhov ua tau zoo tig. Tom qab machining, qhov saum npoo yuav tsum tau pickled thiab passivated. Lub coaxiality thiab dynamic tshuav nyiaj li cas yuav tsum nruj me ntsis tswj thaum lub sij hawm installation, txwv tsis pub txawm lub zoo npaum li cas ntawm cov khoom, nws yuav tsis muaj peev xwm tiv thaiv txhua yam kev puas tsuaj.
Thaum kawg, kuv xav qhia rau nej cov uas tau nyeem tsab xov xwm no
Yog tias koj qhov project tshiab tam sim no muaj qhov tseem ceeb xws li nplawm ncej, twj tso kua mis, thiab lub valve qia uas "tsis tuaj yeem nres", thiab qhov nruab nrab siab -concentration txo cov kua qaub, tsis txhob nqa 316L nyuaj. Xa kuv cov kev ua haujlwm tshwj xeeb (nruab nrab concentration, kub, ceev, siab), thiab peb pab neeg yuav pab koj ua tus nqi qis zog ntawm lub neej dawb. Feem ntau, cov lus qhia xaiv cov khoom siv tshaj lij tuaj yeem pab koj ncaj qha kom txuag tau qhov kev ncua ntawm kev tsim khoom hauv 5-8 xyoo tom ntej.
Nickel-molybdenum rods yeej tsis yog tus pas nrig uas pheej yig tshaj plaws, tab sis nws yog ib qho kev daws teeb meem uas tuaj yeem ua rau koj tsaug zog nyob rau hauv qhov kev ua haujlwm hnyav ntawm "tig hauv cov kua qaub, tig hauv cov kua qaub".
Xav tau ib nqe lus? Xav tau cov qauv kuaj? Xav tau kev qhia machining? Sau ntawv los yog hu rau peb txhua lub sijhawm rau ib qho - ntawm - ib qho kev sib tham. Hauv kev tsim tshuaj lom neeg, kev nyab xeeb los ua ntej, kev thaj yeeb nyab xeeb los ntawm qhov thib ob, thiab nyiaj tuaj thib peb -nickel- molybdenum rods yuav pab koj ua ob yam ua ntej.
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