1. Nyob rau hauv kev tsim kho ntawm loj - nplai, monolithic chemical processing khoom xws li electroplating tanks los yog anodizing kab, yog vim li cas yog Hastelloy C-22 tiaj bar feem ntau yog cov khoom ntawm kev xaiv rau structural kev txhawb nqa, weirs, thiab busbar clamps tshaj lwm yam ntaub ntawv ntawm cov khoom?
Hastelloy C-22 tiaj tus bar (UNS N06022) yog qhov tshwj xeeb tsim rau kev tsim cov khoom siv sab hauv ntawm cov tshuaj tua kab mob hnyav vim nws cov qauv tsim thiab kev ua haujlwm. Tsis zoo li daim ntawv (uas yog nyias dhau rau kev thauj khoom- cov kabmob) lossis phaj (uas yog tuab thiab raug nqi rau daim ntawv), tiaj tiaj muab qhov zoo tshaj plaws hla- ntu- feem ntau yog li ntawm 3mm mus rau 50mm tuab thiab 25mm mus rau 300mm dav-uas sib xyaw ua ke ntawm cov txheej txheem rigidity.
Nyob rau hauv electroplating los yog anodizing da dej uas muaj kub, oxidizing acids xws li chromic, sulfuric, los yog tov kua qaub chemistry nrog cov tshuaj chloride siab, cov tswv cuab raug rau tag nrho immersion, vapor{0}}theem nres, thiab mechanical loads. C-22 tiaj tus bar ua tau zoo ntawm no vim nws qhov tsis sib haum xeeb tag nrho corrosion kuj. Nws cov chemistry sib npaug (~ 22% Cr, ~ 13% Mo, ~ 3% W, qis Fe) muab nws zoo tshaj rau pitting, crevice corrosion, thiab kev nyuaj siab corrosion tawg nyob rau hauv cov halide - nplua nuj, oxidizing ib puag ncig piv rau alloys xws li 316L los yog txawm C-276. Rau cov ntawv thov tseem ceeb xws li tsheb npav bar clamps, uas nqa cov hluav taws xob siab thiab tsis tuaj yeem ua tsis tiav, lub tiaj tiaj tus khoom seem ua kom muaj kev ua tau zoo thiab clamping quab yuam, thaum nws tiv thaiv tsis ua hauj lwm los ntawm acid creep lossis fuming. Tsis tas li ntawd, cov kab tiaj tiaj tuaj yeem yooj yim welded rau hauv cov kab sib txuas sib txuas uas siv cov txheej txheem tsis siv neeg, thiab lawv cov chaw tiaj tus tso cai rau kev ruaj ntseg ntawm cov hlua los yog anodes nrog cov xau-nruj welds, txo cov crevices.
2. Rau kev kho thiab tu kev lag luam hauv kev lag luam pulp & ntawv, tshwj xeeb tshaj yog nyob rau hauv bleach plant washers thiab chlorine dioxide kev pab cuam, Hastelloy C-22 ca bar siv li cas, thiab cov khoom tshwj xeeb dab tsi ua rau nws nyiam weld overlay thiab patch khoom?
Nyob rau hauv cov nroj tsuag bleach mills, cov cuab yeej raug rau ib co ntawm cov feem ntau corrosive tej yam kev mob nyob rau hauv lub ntiaj teb no: kub, acidic chlorine dioxide (ClO₂), sodium hypochlorite, thiab sulfuric acid sib tov. Carbon steel los yog stainless hlau hlab ntsha thiab agitators raug kev txom nyem loj heev thiab pitting corrosion. Hastelloy C-22 tiaj tus bar yog cov khoom siv pob zeb rau kev saib xyuas hauv ob txoj hauv kev tseem ceeb:
Fabrication of Replacement Parts: Flat bar yog siv los tsim cov kev cai hloov cov khoom xws li agitator blades, nozzle reinforcements, thiab me me ducts. Nws daim ntawv tso cai rau ncaj ncaj txiav, dov (rau tej thicknesses), thiab vuam.
Weld Overlay thiab Patch Kho: Qhov no yog nws daim ntawv thov tseem ceeb tshaj plaws. Strips ntawm C-22 tiaj tus bar feem ntau yog siv los ua "cladding stock" lossis "patch material." Siv cov txheej txheem vuam zoo li Gas Tungsten Arc Vuam (GTAW) nrog C-22 muab tub lim, cov pab pawg saib xyuas cov hlua khi ncaj qha hla thaj chaw corroded ntawm cov pa roj carbon steel substrate (ib daim ntawv "wallpapering") los yog siv lawv los tsim thiab welding nyob rau hauv ib qho khoom siv. Cov khoom uas ua rau qhov no yog:
Weldability: C-22 yog tsim los rau vuam uas tsis tshua muaj kev pheej hmoo ntawm kev puas tsuaj rau theem thib ob nyob rau hauv lub tshav kub- cuam tshuam cheeb tsam (HAZ), ua kom lub chaw kho nws tus kheej tseem muaj corrosion-resistant.
Galvanic Compatibility: Thaum welded kom zoo, C-22 overlay/patch ua raws li ib tug noble, tiv thaiv txheej. Nws qhov kev tiv thaiv corrosion heev txhais tau tias nws sacrificially tiv thaiv cov nyob ib sab, tsawg resistant puag hlau mus rau ib tug tsawg kawg nkaus degree, tsom kev tiv thaiv nyob rau hauv feem ntau degraded cheeb tsam.
Kev tiv thaiv rau Oxidizing Chlorides: C-22 cov ntsiab lus siab chromium yog tshwj xeeb tshaj yog tiv thaiv kub, ntub chlorine thiab chlorine dioxide, thawj degradants hauv cov nroj tsuag tshuaj dawb.
3. Los ntawm kev xav ntawm metallurgical thiab kev tswj kom zoo, qhov sib txawv tseem ceeb ntawm kub- dov thiab txias- ua tiav Hastelloy C-22 tiaj tus bar, thiab qhov kev xaiv cuam tshuam li cas rau nws qhov kev ua tau zoo li -welded fabrications piv rau precision-machined Cheebtsam?
Cov txheej txheem tsim khoom (kub- dov vs. txias- tiav) qhia cov yam ntxwv sib txawv uas qhia kev xaiv cov ntawv thov.
Kub-Rolled C-22 Flat Bar: Qhov no yog ua tiav ntawm qhov kub thiab txias (siab tshaj qhov kub ntawm recrystallization). Nws muaj qhov loj me me, qhov loj me me, thiab muaj qhov sib xws ntau dua, kev ntxhov siab -relieved microstructure. Nws yog muab nyob rau hauv cov tshuaj-annealed mob. Nws cov txiaj ntsig tseem ceeb yog kev ua haujlwm zoo dua hauv kev ua haujlwm hnyav hnyav thiab kev ruaj ntseg zoo dua rau welded fabrications. Qhov tsis muaj qhov tseem ceeb nyob hauv kev ntxhov siab txo qis qhov kev pheej hmoo ntawm kev cuam tshuam thaum lub sij hawm los yog tom qab vuam cov qauv loj xws li lub tank thav duab lossis cov khoom siv hauv tsev.
Txias-Tiav (Cold-Rolled/Drawn) C-22 Flat Bar: Qhov no yog ua tiav nyob rau hauv chav tsev kub tom qab pib kub dov. Nws muaj ib tug du, nplai -dawb nto, nruj heev dimension tolerances, thiab ntxiv zog thiab hardness vim ua hauj lwm hardening. Txawm li cas los xij, nws muaj cov xauv - nyob rau hauv cov kev ntxhov siab seem. Nws yog qhov zoo tshaj plaws rau kev ua kom raug- cov khoom siv xws li cov hlua khi, lub rooj zaum valve, lossis cov lus qhia meej, qhov twg cov khoom tiav tuaj yeem raug machined ncaj qha los ntawm lub bar nrog cov khoom me me tshem tawm thiab zoo heev nto. Qhov txias- ua haujlwm, txawm li cas los xij, tsis pom zoo rau cov khoom siv uas yuav raug welded thiab muab tso ncaj qha rau hauv qhov kev pabcuam corrosive hnyav yam tsis muaj cov tshuaj tom qab vuam anneal. Kev sib xyaw ua ke ntawm kev ntxhov siab los ntawm kev ua haujlwm txias thiab vuam tuaj yeem ua rau muaj kev cuam tshuam rau kev ntxhov siab corrosion cracking (SCC) hauv qee qhov chaw pib.
4. Nyob rau hauv flue gas desulfurization (FGD) systems thiab advanced pollution units, Hastelloy C-22 ca bar feem ntau tau teev nyob rau hauv qhov twg, thiab vim li cas nws cov kev ua tau zoo nyob rau hauv "wickel" los yog "pocket" hom crevices thiaj li tseem ceeb?
Hauv FGD systems, qhov corrosion loj tshaj plaws tshwm sim nyob rau hauv cov cheeb tsam ntawm condensation, chlorides, thiab pH tsawg-feem ntau nyob rau hauv lub qhov hluav taws xob ducting, pos huab eliminator txhawb nqa, thiab kua -gas interfaces. Hastelloy C-22 tiaj bar yog dav siv rau:
Mist Eliminator Blade Supports thiab Hangers: Cov no nyias nyias, aerodynamic hniav uas ntes slurry droplets feem ntau txhawb los ntawm daim phiaj los yog thav ntawv ua los ntawm C-22 tiaj tus bar. Lub tiaj tus profile tso cai rau kev ruaj ntseg, tag nrho-ntev vuam ntawm cov hniav txuas.
Cov Txheej Txheem Kev Pabcuam Hauv Tsev (Cib, Pobzeb, lossis FRP): Cov kab tiaj tiaj yog welded rau carbon steel plhaub los tsim ib daim phiaj uas thauj tog rau nkoj monolithic hauv ob sab phlu lossis txhawb cov pobzeb. Lawv ua raws li corrosion-resistant "skeleton."
Kev ua haujlwm hauv cov crevices yog qhov tseem ceeb. Qhov sib cuam tshuam ntawm lub tiaj tiaj thiab lub plhaub, lossis nruab nrab ntawm ob lub bolted tiaj tiaj, tsim ib qho "wickel" crevice - qhov sib txawv nruj uas cov kua qaub tuaj yeem nkag mus rau hauv tab sis tsis ncig, ua rau muaj cov tshuaj chlorides thiab cov kua qaub. C-22's extraordinarily high Critical Crevice Temperature (CCT), feem ntau tshaj 85℃(185℃F) nyob rau hauv ASTM G48 xeem, txhais tau hais tias nws resists pib crevice corrosion nyob rau hauv cov stagnant zones deb zoo dua li cov qauv stainless hlau los yog tsawg alloyed npib tsib xee alloys. Qhov no tiv thaiv undercutting thiab tsis ua hauj lwm ntawm kev them nyiaj yug system, uas yuav ua rau muaj kev puas tsuaj rau hauv ob sab phlu. Nws muaj peev xwm tswj tau qhov tsis muaj zog hauv cov pa oxygen -depleted, high-chloride ib puag ncig yog ib qho laj thawj rau nws cov lus qhia.
5. Thaum muab Hastelloy C-22 tiaj tus bar rau cov kws tshuaj (cGMP) los yog semiconductor high-purity kua tshuab, dab tsi ntxiv kev ua thiab cov ntaub ntawv uas yuav tsum tau tshaj tus qauv ASTM B574 yog feem ntau tsim nyog?
Rau kev lag luam uas ultra- siab purity thiab deg huv si tsis yog - sib tham tau, txheem zeb mov tsis txaus. Cov khoom specification yuav tsum muaj xws li:
Txhim kho Surface Finish: Yuav tsum muaj qhov tshwj xeeb, ntsuas qhov roughness (Ra tus nqi), feem ntau ua tiav los ntawm kev sib tsoo los yog electropolishing. Ib qho kev qhia tshwj xeeb yog Ra Tsawg dua lossis sib npaug rau 0.8 µm (32 µin) rau hauv av tiav lossis Ra Tsawg dua lossis sib npaug rau 0.4 µm (16 µin) rau electropolished. Qhov no minimizes microbial adhesion (pharma) los yog particle tiam (semiconductor).
Kev huv huv thiab Passivation: Lub bar yuav tsum tau ua tib zoo tu thiab ua haujlwm kom tshem tawm tag nrho cov khoom paug hauv khw (roj, roj, hlau hais) thiab ua kom cov chromium oxide passive txheej. Qhov no feem ntau ua raws li cov dej ntshiab yaug thiab ziab hauv qab tswj tau. Ntim yuav tsum yog huv si, tsis yog - cov ntaub ntawv chlorinated (xws li, nkauj xwb polyethylene).
Cov ntaub ntawv pov thawj & Traceability: Daim Ntawv Qhia Txog Cov Ntaub Ntawv Pov Thawj Tag Nrho (CMTR) uas yuav tsum tau muaj traceability kom yaj. Tsis tas li ntawd, daim ntawv pov thawj ntawm cov txheej txheem ntxuav / passivation thiab feem ntau yuav tsum muaj daim ntawv qhia tiav.
Tsis yog-Kev kuaj kev puas tsuaj rau qhov tsis xws luag: 100% Liquid Penetrant Testing (PT) ntawm txhua qhov chaw feem ntau tau teev tseg kom tsis txhob muaj qhov deg - tawg tsis xws luag xws li seams los yog tawg, uas tuaj yeem muaj cov kab mob sib kis.
Tsawg Leachability Cov Ntaub Ntawv: Rau cov ntawv thov tshuaj, cov neeg muag khoom yuav raug nug kom muab cov ntaub ntawv rho tawm ib tus qauv xws li USP<665>, qhia me me leaching ntawm hlau ions (Ni, Cr, Mo) los ntawm cov khoom nyob rau hauv cov txheej txheem simulated.
