1. Dab tsi yog cov tshuaj lom neeg muaj pes tsawg leeg ntawm acid resistant monel hlau 400 tus hlau thiab nws yuav ua li cas rau nws cov kua qaub?
Acid resistant monel hlau 400 tus ncej muaj feem ntau ntawm kwv yees li 63% npib tsib caug (ni) thiab} tooj liab (cu). Nws tseem muaj cov hlau me me (FE, nce mus txog 2.5%), MIN, txog li ntawm cov pa roj carbon (c, li 2,5%), thiab Sulfur (S, nce txog 0.024%).
Lub siab Nickel cov ntsiab lus yog tus yuam sij rau nws Advas Acid tsis kam. Nickel ua cov txheej Oxide passive rau saum npoo av, uas ua raws li cov nyom tawm tsam ntawm ntau cov acids, tshwj xeeb yog tsis {oxidizing acids xws li hydrofluoric acid (HF). Tooj liab txhim kho cov txheej txheem duction thiab kev ua haujlwm thaum ua tiav rau tsib xee hauv kev tiv thaiv corrosion hauv qee cov av acid. Hlau Txhim kho cov alloy cov neeg kho tshuab muaj zog thiab tiv taus pitting corrosion hauv kev daws teeb meem kua txob. Manganese pab nyob rau deoxidation thaum lub sij hawm tsim thiab ua rau ua rau Alloy's Stability Stability. Qhov kev tswj nruj nruj ntawm cov kab ntu ua kom ntseeg tau tias lub corrosion tawm tsam tsis yog nyom; Piv txwv li, qis cov lus faj sulfur tiv thaiv emgrittlement nyob rau hauv high- kub acidic tej yam kev mob.
2. Nyob rau hauv uas tshwj xeeb cov kua qaub -}}}}}}} alloy alloy tau thov, thiab yog vim li cas?
Kev Lag Luam Kev Lag Luam: Nws yog dav siv nyob rau hauv cov khoom siv xws li qub, twj, thiab reactor cov cheebtsam uas tuav cov kua qaub hydrofluoric acid. Hydrofluoric acid yog cov corrosive heev rau feem ntau cov hlau, tab sis Monel 400} Kev xaiv nplua nuj, ua rau kev xaiv txhim khu kev qha rau cov ntawv thov tseem ceeb ntawd. Piv txwv li, nyob rau hauv kev lag luam fluorocarbor, qhov chaw hydrofluoric acid yog cov khoom tseem ceeb, cov nees yog siv los ua kom sib thooj nrog cov kua qaub.
Petrochemical Kev Lag Luam: hauv cov txheej txheem cuam tshuam nrog sulfuric acid (hauv qis {{{}}} oxidizing tej xwm txheej) thiab organic acids, monel 400 tuav tau siv. Lawv tau tiv thaiv cov kev cuam tshuam ntawm cov acids hauv cov haujlwm ua kom ua haujlwm, xws li nyob rau hauv alkylation units uas sulfuric acid yog siv ua catalyst. Lub Alloy qhov tsis kam rau ob qho tib si cov kua qaub thiab cov nrog cov kev ntsuas siab siab thiab kub ua kom ntev {5} {lo lus ua tau zoo.
Kev lag luam tsuas: Nws pom cov ntawv thov hauv cov tshuab ua haujlwm uas siv cov kua qaub zoo li hydrochloric acid (hauv kev sib txawv) los rho tawm cov hlau los ntawm ores. Qhov hnyav acws acidic ib puag ncig ntawm cov tso tsheb hlau luam uas xav tau cov khoom siv nrog cov khoom siv corrosion corrosations zoo li agitators thiab impellers.
3. Yuav ua li cas ua kev tsim khoom ntawm Monel alloy 400 bar cuam tshuam nws cov kua qaub tsis kam thiab tshuab ua haujlwm?
Kev tsim khoom tsim tau cuam tshuam ntau qhov kev ua tau zoo ntawm Monel alloy 400 bar. Melting yog theem tseem ceeb, xav kom meej tswj qhov kub thiab huab cua kom ntseeg tau cov kab tsib ntawm npib tsib xee, tooj liab, thiab lwm yam. Tej kev sib cais ntawm cov ntsiab lus tuaj yeem tsim cov chaw nrog kev daws teeb meem tsis kam, ua rau cov bar tsis zoo rau cov kua qaub.
Kub ua haujlwm, xws li forging thiab dov, yog siv los ua kom haum rau bar. Kev tswj kom yog qhov ntsuas kub kom sov thaum lub sijhawm kub (feem ntau ntawm 870 - 1170}} Cov cim khaws cia rau ob qho tib si lub zog thiab corrosion tsis kam. Kev kub dhau tuaj yeem ua rau cov nplej zom, txo qhov bar lub bar lub qhov tawv, thaum underheating tej zaum yuav ua rau tawg thaum lub sijhawm ua.
Txias ua haujlwm, zoo li daim duab lossis extrusion, tuaj yeem txhim kho bar lub tshuab muaj zog los ntawm kev tawv tawv. Txawm li cas los xij, kev ua haujlwm txias heev yuav qhia sab hauv kev ntxhov siab, uas, yog tias tsis tau txais kev pheej hmoo ntawm kev ua kom muaj kev ntxhov siab hauv cov acidic ib puag ncig. Tom qab annaling (nyob ib ncig ntawm 700 - 900 degree) restores micriving microsistance, kom ntseeg tau tias cov kua qaub tsis muaj kev cuam tshuam.
Tocishing deg tau tseem ceeb heev. Ib tug du, puas qhov tsis taus {{1} dawb saum cov cwj pwm hauv cov kua qaub, raws li cov khawb av muaj peev xwm ua cov ntsiab lus rau kev xeb.
4. Dab tsi yog qhov tseem ceeb technical cov cev ntawm monel aleloy 400 bar, thiab lawv ua li cas lawv ua hauv acidic ib puag ncig piv rau lwm cov alloys?
Monel alloy 400 Bar cov khoom ua pov thawj zoo kawg li cov khoom siv: ib lub zog} mpa} {{% (nyob ntawm seb kev kho cua sov thiab kev ua cua sov thiab ua). Nws muaj lub hardness zoo, feem ntau 110 - 150 hb, thiab tswj hwm cov khoom no ntau tshaj qhov kub thiab txias.
Hauv cov acidic ib puag ncig, nws cov neeg kho tshuab sawv tawm tawm piv rau lwm yam alloys. Piv txwv li, piv rau cov hlau stainless 316, uas yog dav siv nyob rau hauv cov ntawv thov uas muaj xeb, Monel 400 muaj cov kua roj acid zoo tshaj plaws rau cov kua qaub hydrofluor. Stainless hlau 316 yog ib tus mob rau HF, thaum Monel 400 tseem nyob ruaj khov.
Thaum piv rau tooj dag alloys, monel 400 muaj siab dua lub zog thiab tawm tswv yim, ua rau nws haum siab rau qhov siab- cov kua siab acidic tshuab. Brass kuj corrode sai nyob rau hauv ntau cov acids, tshwj xeeb tshaj yog cov neeg muaj chlorine, hos monel 400 lub ensures kev ntseeg siab tau tswj hwm.
Hauv cov sulfuric proundments (tsis muaj - ecidizing carbon hlau, uas undergeing nws lub zog thiab ductility tshaj ncua sij hawm.
5. Dab tsi yog kev coj ua thiab kev coj ua yog qhov tseem ceeb los khaws cov acid tsis kam ntawm monel alloy 400 bar hauv kev lag luam siv?
Kev tu kom zoo: Tom qab raug rau cov kua qaub, qhov bar yuav tsum tau huv si nrog dej nruab nrab kom tshem tawm cov realual acid. Qhov no txwv tsis pub muaj kev sib cuag ntev ntev nrog cov tshuaj acidic, uas tuaj yeem maj mam℃ntawm cov oxide txheej. Zam txhob siv cov tshuaj ntxuav tsis meej uas yuav khawb saum npoo av, raws li khawb kom muaj kev tsim kho corrosion.
Kev Cia Siab: Muab cov neeg cia Monel 400 tuav hauv qhov qhuav, zoo- pa taws thaj chaw, deb ntawm cov pa taws thiab tshuaj lom neeg. Sib cuag nrog cov ntaub ntawv xws li muaj zog oxidizing oxidizing cov neeg sawv cev (piv txwv li, nitric acid nyob rau hauv cov kev muaj siab) yuav tsum zam, raws li lawv tuaj yeem ua kev puas tsuaj ntawm alloy cov txheej tiv thaiv. Xyuas kom meej cov kab ntawv tsis tau muab ntim rau hauv txoj kev uas ua rau cov tshuab puas rau lawv cov chaw.
Kev zam kev corrosion: thaum sib dhos sib xyaw ua ke los ntawm Monel 400 Bar nrog lwm cov hlau, kom cov rwb thaiv tsev kom tiv thaiv kom txhob muaj kev tiv thaiv Galvanic. Monel 400 muaj ntau ncab ntau dua li ntau cov hlau (piv txwv li cov hlau roj carbon,, yog li sib chwv hauv cov moid acctrolyte tuaj yeem ua rau lub siab tawv hlau thiab muaj peev xwm ua kev puas tsuaj rau cov monel 400 nto.
Kev soj ntsuam tsis tu ncua: ntu ntu rau cov cim ntawm kev xeb, xws li pitting, discoloration, lossis tawg tshwj xeeb, tshwj xeeb tshaj yog nyob hauv cov cheeb tsam uas raug rau cov acids. Ntxov qhia kom paub txog kev tu siab, xws li polishing kom tshem tawm me corrosion me me, kom tiv thaiv ntxiv tsis zoo ntxiv.
Kev tswj hwm kev ua: thaum lub tshuab sib xyaw los yog fabrication ntawm bar rau mittices, siv txias 400 kom tsis txhob qhia tau tias nws cov kua qaub tsis yeem. Nco ntsoov tias muaj kev vuam lossis koom nrog cov txheej txheem thiab cov ntaub ntawv muab tub lim thiab cov qauv muab tub lim thiab cov qauv ua kom zoo nkauj thiab cov qauv siv corrosion {{}} tiv taus cov khoom.
