Ntshiab tantalum tubing yog muaj nyob rau hauv kev lag luam thiab ua tau zoo heev nyob rau hauv ib puag ncig tshuaj corrosive heev, tab sis ib tug tantalum-tungsten alloy muaj peev xwm muab cov khoom siv ntxiv zog uas xav tau rau siab dua, cov phab ntsa nyias, los yog txhim kho corrosion kuj. Cov kev xaiv dhau los ua ib qho kev sib raug zoo engineering sib npaug ntawm qhov siab tshaj plaws tshuaj inertness thiab txhim khu kev ua haujlwm zoo.
Hauv kev pab cuam ultra-corrosive heat exchanger, cov khoom siv raj yuav tsum muaj sia nyob cov kua qaub thaum tseem tiv taus siab, kev vibration, thermal cycling, thiab ntev - lub sij hawm mechanical stress. Kev sib piv ntawm cov ntshiab tantalum thiab tantalum -tungsten alloys yog li ntawd txuas ntxiv tshaj cov kab kos corrosion ib leeg.
Nkag siab Ntshiab Tantalum
Exceptional Corrosion Resistance
Ntshiab tantalum, feem ntau muaj ntau tshaj 99.9% tantalum, yog dav suav hais tias yog ib qho ntawm feem ntau corrosion- tiv taus engineering hlau muaj.
Its remarkable chemical stability comes from a dense, highly protective oxide film that forms naturally on the metal surface. Cov txheej txheem oxide no tseem nyob ruaj khov nyob thoob plaws ntau qhov chaw muaj tshuaj lom neeg hnyav, suav nrog:
Hydrochloric acid
Sulfuric acid
Nitric acid
Mixed acid systems
Chlorinated txheej txheem ntws
Vim tias cov oxide zaj duab xis yog ib qho zoo sib xws thiab muaj qhov tsis zoo -dawb, tantalum ntshiab muab qhov siab tshaj plaws corrosion kuj nyob rau hauv tsev neeg tantalum.
High Ductility thiab Fabrication Advantages
Ntshiab tantalum kuj yog cov ductile heev.
Qhov ductility no muab ntau yam txiaj ntsig zoo:
Lub raj ua kom yooj yim dua
Zoo dua tiv thaiv thermal stress cracking
Txhim kho kev vibration kam rau ua
Ntau dua kam rau fabrication defects
Hauv kev tsim cov khoom sib pauv, cov khoom siv hluav taws xob yuav muaj txiaj ntsig tshwj xeeb yog tias nyias - phab ntsa tubing yuav tsum tau nthuav dav, welded, los yog tsim rau hauv cov geometry nyuaj.
Vim li cas tungsten ntxiv rau Tantalum
Ua kom muaj zog thiab hardness
Kev sib tham nyob ib puag ncigtantalum vs tantalum tungsten alloy raj xaivlub hauv paus tseem ceeb ntawm mechanical kev ua tau zoo.
Ntxiv ib qho kev tswj hwm ntawm tungsten tseem ceeb ntxiv rau cov khoom siv.
Common alloy qib muaj xws li:
- 2.5 W
Tau - 10 W
Ntxiv ib qho kov ntawm tungsten zoo ib yam li alloying steel kom muaj zog dua. Cov tungsten atoms txhawb cov tantalum siv lead ua qauv thiab txhim kho kev tiv thaiv rau deformation nyob rau hauv load.
Piv nrog cov ntshiab tantalum, tantalum-tungsten alloys muab:
Siab zog tensile
Ntau zog tawm los
Nce hardness
Zoo hnav tsis kam
Txhim khu kev yaig kuj
Ta-2.5W, yog ib qho ntawm feem ntau siv sib pauv alloys, feem ntau nthuav tawm lub zog ntawm kwv yees li 50% siab dua cov ntshiab tantalum.
Cov txiaj ntsig rau Heat Exchanger Design
Lub zog siab dua ncaj qha cuam tshuam rau kev hloov pauv tsim yooj yim.
Vim tias cov alloy tuaj yeem tiv taus kev ntxhov siab ntau dua, cov phab ntsa nyias nyias tuaj yeem raug teev thaum tseem ua tau raws li qhov yuav tsum tau ua.
Qhov no tsim ntau yam zoo:
Txhim kho cua sov hloov
Txo qhov hnyav exchanger
Tsawg tantalum cov khoom muag
Me me exchanger qhov ntev
Zoo dua thermal teb
Cov phab ntsa thinner txo cov thermal tsis kam los ntawm cov khoom siv raj, pab txhim kho tag nrho cov cua sov hloov coefficient.
Nyob rau hauv compact exchanger systems, qhov txiaj ntsig no tuaj yeem yog qhov tseem ceeb.
Corrosion Resistance Trade -Offs
Ntshiab Tantalum tseem yog tus qauv
Txawm hais tias tantalum-tungsten alloys tseem muaj zog tiv taus corrosion, ntshiab tantalum tseem muab qhov siab tshaj plaws ntawm cov tshuaj inertness.
Qhov sib ntxiv ntawm tungsten me ntsis hloov tus cwj pwm passive oxide hauv qee qhov chaw huab cua.
Hauv qee qhov kev txhoj puab heev, siab - qhov kub thiab txias, fluoride- cov kua qaub dawb, cov hlau yuav ua rau muaj kev xeb ntau dua piv nrog cov ntshiab tantalum.
Cov kev sib txawv no feem ntau me me, tab sis lawv tuaj yeem dhau los ua qhov tseem ceeb hauv ultra-siab- cov txheej txheem purity.
Tungsten Cwj Pwm hauv Oxidizing Ib puag ncig
Tantalum nws tus kheej tseem tseem ceeb tiv thaiv rau feem ntau cov acids nyob rau hauv oxidizing tej yam kev mob.
Txawm li cas los xij, tungsten tuaj yeem yaj nyob rau hauv ib puag ncig oxidizing heev.
Vim li no, cov kev pabcuam oxidizing tsis tshua muaj siab tuaj yeem nyiam cov tantalum ntshiab txawm tias nws lub zog qis dua.
Kev ntsuam xyuas zoo sib xws tseem tsim nyog thaum:
Acid concentration yog siab heev
Kev khiav hauj lwm kub mus txog qhov kub thiab txias
Kev kis kab mob tsis tuaj yeem zam tau
Ultra-ntev tsim lub neej yuav tsum tau
Kev taw qhia txog kev xaiv cov khoom siv
Qhov twg Ta-2.5W feem ntau nyiam
Rau feem ntau cov kev pabcuam acid, kev ua haujlwm corrosion ntawm Ta-2.5W yog ze li qhov tsis paub meej ntawm cov ntshiab tantalum.
Cov ntawv thov ib txwm muaj xws li:
Sulfuric acid exchangers
Hydrochloric acid txias txias
Nitric acid systems
Acid rov qab units
Chemical reactor tsho
Nyob rau hauv cov cheeb tsam no, lub zog ntxiv ntawm cov hlau feem ntau tshaj qhov me me theoretical txo nyob rau hauv corrosion kuj.
Lub siab- muaj cov khoom tshwj xeeb tshwj xeeb yog muaj txiaj ntsig los ntawm kev txhim kho cov khoom siv kho tshuab.
Qhov Pure Tantalum Tseem Qhia
Ntshiab tantalum tseem raug xaiv rau cov ntawv thov feem ntau suav nrog:
Ultra{0}}kev ua haujlwm siab purity
Cov tshuaj semiconductor
Pharmaceutical intermediates
Cov kab mob tseem ceeb -sensitive systems
Heev nruj oxidizing acids
Hauv cov xwm txheej no, qhov siab tshaj plaws tshuaj inertness ua qhov tseem ceeb tshaj li kev ua haujlwm ntawm cov qauv.
Qhov siab dua ductility ntawm ntshiab tantalum kuj tseem ua kom yooj yim fabrication nyob rau hauv tshwj xeeb exchanger geometry.
Mechanical Design Considerations
Siab thiab phab ntsa Thickness
Mechanical siab xam feem ntau tsav qhov kawg tshwm sim ntawm atantalum vs tantalum tungsten alloy raj xaivkev txiav txim.
Siab zog alloy tso cai rau:
Txo lub raj phab ntsa thickness
Siab dua tso cai
Kev nyab xeeb ntau dua
Txhim khu kev tiv thaiv rau deformation
Rau lub plhaub loj - thiab - tube exchangers, cov khoom txuag ntawm cov tubing nyias tuaj yeem ua rau cov nqi tsim khoom ntau dua ntawm cov hlau.
Erosion thiab Flow Velocity Resistance
Tantalum-tungsten alloys kuj ua tau zoo dua nyob rau hauv cov dej ntws ntws.
Cov ntawv thov suav nrog:
Cov kua dej siab tshaj
Suspended solids
Turbulent acid ntws
Pulsating ncig
tej zaum yuav tau txais txiaj ntsig los ntawm kev nce hardness ntawm Ta-W alloys.
Qhov kev txhim kho hnav tsis kam tuaj yeem ua rau lub neej ntev dua kev sib pauv.
Fabrication thiab Welding Factors
Vuam Cwj Pwm
Ob leeg ntshiab tantalum thiab tantalum -tungsten alloys yuav tsum tau ceev faj cov txheej txheem vuam vim lawv rhiab heev rau cov pa paug ntawm qhov kub siab.
Txawm li cas los xij, nce cov ntsiab lus tungsten feem ntau txo cov ductility thiab yuav ua rau me ntsis nce fabrication complexity.
Ta-10W, piv txwv li, muaj zog dua Ta-2.5W tab sis kuj tsawg formable.
Qhov sib npaug ntawm qhov muaj zog thiab kev tsim khoom
Raws li cov ntsiab lus tungsten nce:
Lub zog nce
Hardness nce
Ductility txo
Formability ua ntau txwv
Vim li no, Ta-2.5W feem ntau sawv cev rau kev sib haum xeeb ntawm kev tiv thaiv corrosion, kev ua haujlwm zoo, thiab kev tsim khoom.
Xaus
Qhov kev txiav txim siab ntawm cov ntshiab tantalum thiab tantalum -tungsten alloy tubing yog tsim los ntawm cov neeg kho tshuab tsim cov kev xav tau sib npaug tiv thaiv qhov xav tau siab tshaj plaws corrosion kuj. Ntshiab tantalum muab cov tshuaj lom neeg muaj peev xwm tshaj plaws los ntawm nws cov yeeb yaj kiab oxide ruaj khov thiab qhov tshwj xeeb ductility, ua rau nws zoo tagnrho rau cov kab mob sib kis ntau tshaj plaws - rhiab heev thiab chemically aggressive applications.
Kev ntsuam xyuas ntawmtantalum vs tantalum tungsten alloy raj xaivFeem ntau nyiam Ta-2.5W rau cov khoom siv hluav taws xob hauv kev lag luam vim tias cov hlau xaim tau txhim kho lub zog thiab hardness nrog me ntsis kev ua haujlwm tsis zoo ntawm kev tiv thaiv corrosion hauv feem ntau sulfuric, hydrochloric, thiab nitric acid cov kev pabcuam. Lub peev xwm los siv cov phab ntsa nyias nyias tuaj yeem txhim kho thermal kev ua tau zoo thaum txo qhov sib pauv loj thiab qhov hnyav.
Hauv ultra-corrosive exchanger engineering, txawm tias ntawm cov hlau txawv, cov khoom xaiv tsis tshua muaj ib lo lus teb zoo meej. Hloov chaw, hloov maj mam alloying hloov pauv tso cai rau cov neeg tsim qauv los kho qhov sib npaug ntawm purity, lub zog, manufacturability, thiab ntev - lub sij hawm cia siab rau txhua qhov xav tau ib puag ncig txheej txheem.
