Hastelloy C-276 vs Titanium Qib 2: Tus nqi thiab kev ua tau zoo hauv Oxidizing Chloride Ib puag ncig

Hastelloy C-276thiab titanium Qib 2 yog ob qho tib si cov ntaub ntawv zoo tshaj plaws tau mus txog thaum tus qauv thiab txawm tias siab tshaj - alloy stainless hlau tsis tuaj yeem muaj cov tshuaj chloride - cov txheej txheem tshuaj lom neeg nplua nuj - tab sis lawv tau txais lub koob npe nrov los ntawm kev sib txawv ntawm cov yeeb yaj kiab chemistry, thiab qhov sib txawv ntawd txhais tau hais tias txhua yam khoom muaj ib puag ncig tiag tiag uas nws tsis yog txaus tab sis qhov kev xaiv zoo dua.

Cov lus qhia no piv rau C-276 thiab titanium Qib 2 ncaj qha hauv kev pabcuam oxidizing chloride, piav qhia tias vim li cas titanium tuaj yeem ua tau zoo dua cov khoom siv nickel ntau dua nyob rau hauv qhov chaw no, vim li cas tib lub titanium tuaj yeem ua tsis tau qhov twg C-276 ua tiav, thiab qhov hnyav thiab nqi npaum li cas rau qhov kev txiav txim zaum kawg.

Hastelloy C-276 thiab Titanium Qib 2 yog dab tsi, thiab Vim li cas Ob leeg thiaj suav tias yog cov khoom zoo tshaj plaws corrosion-Resistant?

Hastelloy C-276 yog npib tsib xee-molybdenum-chromium superalloy muaj nuj nqis rau broad corrosion kuj nyob rau hauv ob qho tib si oxidizing thiab txo cov cheeb tsam, thaum titanium Qib 2 yog ib tug coj mus muag ntshiab titanium qib muaj nuj nqis rau ib tug exceptionally ruaj khov oxide passive zaj duab xis nyob rau hauv lawv cov khoom siv oxidizing sib txawv, tab sis ob qho tib si muaj kev sib txawv. kev txwv.

C-276 (UNS N10276) belongs rau tsev neeg nickel superalloy sib tham nyob rau hauv lwm yam kev qhia ntawm Hastelloy machining thiab siab -kub cov khoom, thiab nws corrosion kuj los ntawm ib tug chromium- thiab molybdenum-nplua nuj passive zaj duab xis txhawb nqa los ntawm tungsten, muab nws cov kev ua tau zoo ntawm cov oxidizing embodiment, oxidizing tsis tshua muaj acidity.

Titanium Qib 2 yog qhov tseem ceeb ntshiab titanium (kev lag luam ntshiab, tsis muaj khoom siv) uas nws cov corrosion kuj los ntawm ib qho tsis tshua muaj nyias, siab tawv, nws tus kheej - kho titanium dioxide zaj duab xis uas tsim yuav luag tam sim ntawm kev raug oxygen lossis oxidizing xov xwm. Ob leeg cov ntaub ntawv raug mus txog rau tshwj xeeb vim hais tias tus qauv thiab txawm 6% molybdenum super-austenitic stainless hlau, them rau lwm yam kev qhia ntawm chloride tsis kam, tsis txaus nyob rau hauv cov tshuaj chloride feem ntau txhoj puab heev ib puag ncig - tab sis qhov tshwj xeeb chemistry ntawm txhua cov ntaub ntawv passive zaj duab xis, sib tham tom ntej, txiav txim siab seb qhov twg ua tau zoo dua hauv ntiaj teb{6.

Vim li cas Titanium Qib 2 Excel tshwj xeeb hauv Oxidizing Chloride Ib puag ncig?

Titanium Qib 2 ua tau zoo nyob rau hauv oxidizing chloride ib puag ncig vim nws cov titanium dioxide tiv thaiv zaj duab xis tsis tsuas yog tiv thaiv kev tawm tsam - nws nquag thickens thiab ntxiv dag zog rau hauv oxidizing tej yam kev mob, lub ntsiab lus ntau oxidizing ib puag ncig, lub zog titanium tiv thaiv corrosion ua tau.

Feem ntau passive- zaj duab xis corrosion kuj, nrog rau cov hlau tsis muaj steel thiab npib tsib xee alloys, ua haujlwm los ntawm kev tiv thaiv kev tawg ntawm ib qho uas twb muaj lawm - tsim txheej tiv thaiv; titanium tus cwj pwm yog txawv vim hais tias oxidizing tej yam kev mob nquag txhawb zog thiab thicken nws TiO₂ zaj duab xis es tsis yog tsuas yog tsis ua phem rau nws. Qhov no yog vim li cas titanium ua tau zoo tshwj xeeb hauv ib puag ncig xws li cov roj chlorine ntub dej, sodium thiab calcium hypochlorite (bleach), thiab lwm yam oxidizing chloride media - tej yam kev mob uas yuav aggressively corrosive rau ntau lwm yam hlau yog, rau titanium, tshwj xeeb chemistry uas ua rau nws cov yeeb yaj kiab tiv thaiv ntawm nws feem ntau.

Qhov no tsis yog qhov txiaj ntsig me me; Nws yog qhov tseem ceeb vim li cas titanium tau dhau los ua tus qauv, feem ntau nyiam cov khoom siv hauv cov khoom siv tshuaj chlorine thiab cov khoom siv tshuaj bleach cog tshwj xeeb, nquag sib txuam lossis ntau tshaj cov khoom siv nickel hnyav hnyav hauv cov kev pabcuam tshwj xeeb no.

Vim li cas Titanium tsis tuaj yeem txo cov kua qaub ib puag ncig qhov twg Hastelloy C-276 ua tiav?

Titanium tuaj yeem ua tsis tiav hauv kev txo cov kua qaub ib puag ncig xws li hydrochloric acid vim tias nws cov yeeb yaj kiab tiv thaiv oxide nyob ntawm qhov chaw oxidizing kom ruaj khov, thiab tsis muaj qhov kev txhawb nqa oxidizing zaj duab xis tuaj yeem tawg thiab nthuav tawm titanium liab qab kom nrawm nrawm, qhov C-276's molybdenum-reinforced passive zaj duab xis tseem nyob ruaj khov ntawm ob qho tib si oxidizing thiab txo chemist.

Qhov no yog ib qho tseem ceeb tshaj plaws ntawm kev sib txawv ntawm ob cov ntaub ntawv, thiab nws yog qhov tshwm sim ntawm qhov sib txawv ntawm chemistry txhua qhov tso siab rau: titanium's TiO₂ zaj duab xis yuav tsum muaj oxidizing ib puag ncig los tsim thiab nyob ruaj khov, yog li hauv kev txo cov kua qaub tiag tiag - hydrochloric acid yog cov piv txwv classic - titanium poob qhov kev ua haujlwm zoo heev, nws muaj peev xwm ua tau zoo heev thiab corrosion kuj. hauv kev pabcuam oxidizing chloride.

C-276's corrosion resistance mechanism tsis nqa qhov kev vam khom tib yam; molybdenum tshwj xeeb txhawb kev tiv thaiv kom tsis txhob muaj kua qaub nyob rau hauv nickel alloy metallurgy, uas yog vim li cas C-276 tseem yog ib qho ntawm ob peb alloys tiag tiag txhim khu kev qha hauv hydrochloric acid thiab lwm yam kev txo qis uas titanium tsis pom zoo. Qhov no asymmetry yog qhov tseem ceeb vim li cas cov engineers tsis tuaj yeem kho ob qho khoom siv zoo li kev hloov pauv "hloov dua tshiab" kev xaiv los ntawm stainless hlau - qhov kev xaiv raug yog nyob ntawm sab twg ntawm oxidizing / txo cov spectrum ntawm cov txheej txheem tiag tiag nyob rau hauv, suav nrog cov xwm txheej ntxhov siab tiag tiag, tsis yog lub npe hu ua chemistry.

Yuav Ua Li Cas Ob Cov Khoom Sib Piv hauv Localized (Pitting / Crevice) Corrosion Resistance?

Ob leeg C-276 thiab titanium Qib 2 muaj kev tiv thaiv zoo heev rau pitting thiab crevice corrosion nyob rau hauv feem ntau chloride ib puag ncig, tab sis titanium qhov kev tiv thaiv tuaj yeem ua rau ntau dua nyob rau hauv kub, qis -}pH, crevice-nrawm chloride brine tej yam kev mob, thaum C-276's titanium qhov kev tiv thaiv muaj peev xwm ua tau zoo tshaj plaws nyob rau hauv ntau yam ntawm pH. localized-corrosion-nrhiav tej yam kev mob.

Ib sab -los ntawm- sab vaj huam sib luag qhia txog cov txheej txheem no - sib txawv nrog rau qhov hnyav thiab qhov hnyav:

Table 1. Cov cuab yeej sawv cev sib piv ntawm Hastelloy C-276 thiab titanium Qib 2. Qhov tseem ceeb thiab kev coj cwj pwm yog qhov piv txwv thiab dav; tshwj xeeb alloy tej yam kev mob, cov khoom daim ntawv, thiab cov txheej txheem chemistry yuav tsum tau validated tiv thaiv cov ntaub ntawv tsim tawm tam sim no thiab, qhov twg lav, daim ntawv thov tshwj xeeb kev kuaj corrosion.

Nyob rau hauv kev xyaum, ob qho tib si cov ntaub ntawv tuav feem ntau ntawm chloride pitting thiab crevice scenarios zoo, uas yog vim li cas ncaj qha localized-corrosion kuj tsis tshua txiav txim siab ntawm lawv tus kheej; qhov sib txawv ntawm qhov sib txawv ntau dua yog qhov oxidizing- tiv thaiv - txo tus cwj pwm ntawm cov txheej txheem ib puag ncig uas tau tham saum toj no, nrog rau qhov chaw corrosion kuj ua haujlwm ntau dua li kev kuaj thib ob thaum thawj cov lus nug oxidizing / txo tau txo qhov kev xaiv.

Yuav ua li cas titanium qhov qis dua qhov cuam tshuam rau cov khoom hnyav thiab cov nqi teeb tsa?

Titanium Qib 2 qhov ceev ntawm kwv yees li 4.5 g / cm³, kwv yees li ib nrab ntawm Hastelloy C-276's roughly 8.89 g / cm³, txhais tau tias cov khoom siv titanium ntawm qhov sib npaug ntawm qhov hnyav hnyav heev, txhais rau hauv kev txuag nyiaj tiag tiag hauv kev txhawb nqa, nqa thiab teeb tsa cov khoom siv thauj khoom, thiab hauv qee qhov khoom siv thauj khoom.

Qhov hnyav tseem ceeb thoob plaws hauv cov txheej txheem, tsis yog nyob rau sab ntug dej hiav txwv lossis aerospace kev siv: sib dua cov khoom siv hluav taws xob, cov kab, thiab cov kav dej kom txo tau cov qauv hlau thiab lub hauv paus xav tau los txhawb lawv, ua kom yooj yim rigging thiab installation, thiab tuaj yeem txo cov twj tso kua mis lossis txhawb nqa hauv kev sib hloov lossis tshem tawm cov khoom siv. Vim tias titanium qhov ntom ntom zoo dua C-276 yog qhov loj heev - kwv yees ib qho ntawm ob - qhov no tsis yog qhov kev txiav txim siab thib ob hauv cov ntawv thov uas titanium's oxidizing -chloride kev ua tau zoo twb ua rau nws xaiv qhov siv tau; nws feem ntau yog qhov kev txiav txim siab ua tau zoo thiab kev lag luam zoo, echoing qhov hnyav tib yam -tsim kev lag luam logic tau tham hauv lwm cov lus qhia txog kev siv zog siab duplex stainless hlau, tab sis ua tiav ntawm no los ntawm qhov qis qis dua li lub zog siab dua.

Yuav Ua Li Cas C-276 thiab Titanium Qib 2 Sib piv hauv Raw Material Cost?

Titanium Qib 2 feem ntau tsis tshua kim tshaj Hastelloy C-276 ntawm ib qho -kilogram hauv paus, thiab vim tias titanium kuj yog kwv yees li ib nrab ntawm qhov ceev ntawm C-276, nws tus nqi kom zoo dua ntawm ib qho -cov khoom lossis ib- cov ntaub ntawv ntim yog feem ntau txawm tias ob qho tib si pronounced pricing yog qhov hloov pauv tiag tiag thiab yuav tsum tau lees paub tiv thaiv kev lag luam tam sim no quotes.

C-276's siab molybdenum, npib tsib xee, thiab tungsten cov ntsiab lus tso nws ntawm cov nqi kim dua corrosion-cov alloys resistant rau ib-kilogram hauv paus, ua raws li cov qauv nqi alloy uas tau tham hauv lwm cov lus qhia ntawm nickel alloy pricing. Titanium sponge thiab zeb khoom pricing muaj keeb kwm feem ntau tuaj nyob rau hauv qis dua - molybdenum nickel alloy nqi ib kilogram, thiab vim hais tias ib tug titanium feem ntawm ib tug muab me me hnyav roughly ib nrab ntawm cov tib yam khoom yuav hnyav nyob rau hauv C-276, tus nqi sib txawv ntawm ib tug tiav-component hauv paus yuav loj dua cov raw cov ntaub ntawv ib leeg.

Qhov kev hloov pauv no yog qhov tseeb, qhov ua tau zoo yog vim li cas titanium feem ntau yog tus nqi ntau dua -kev xaiv zoo tshwj xeeb hauv kev pabcuam oxidizing chloride qhov twg nws yog technically suited - tsis yog ib qho technically txaus tab sis pricier lwm txoj rau nickel alloys, tab sis muaj peev xwm qis dua - tus nqi xaiv ib zaug qhov hnyav tau suav nrog.

Yam khoom twg yog qhov zoo dua rau kev pabcuam ntub dej chlorine tshwj xeeb?

Titanium Qib 2 thiab Hastelloy C-276 yog ob qho tib si zoo heev, tsim cov khoom siv zoo xaiv rau cov kev pabcuam chlorine ntub dej, thiab hauv qhov tshwj xeeb no, kom meej meej oxidizing daim ntawv thov titanium feem ntau yog qhov kev xaiv zoo tshaj plaws ntawm tus nqi thiab qhov hnyav, yog tias cov txheej txheem tsis muaj kev pheej hmoo txaus ntshai ntawm kev txo qis.

Kev sib piv thoob plaws oxidizing -chloride thiab lwm yam txheej txheem ib puag ncig:

Table 2. Cov neeg sawv cev tsim nyog sib piv, Hastelloy C-276 vs. titanium Qib 2, thoob plaws oxidizing chloride thiab lwm yam txheej txheem ib puag ncig.

Cov roj chlorine ntub dej yog, ntau yam, titanium daim ntawv thov kos npe - ib puag ncig kom pom tseeb thiab tsis tu ncua oxidizing qhov chaw uas nws tus cwj pwm tsis zoo yog qhov muaj zog tshaj plaws, thiab qhov twg nws cov nqi thiab qhov hnyav zoo dua C-276 tuaj yeem ntes yam tsis muaj qhov txo qis uas yuav ua rau lwm tus nyiam cov nickel alloy. Qhov kev txiav txim siab dhau los ua ntau dua, txawm li cas los xij, thaum twg cov txheej txheem tuaj yeem nthuav tawm cov khoom siv los txo cov xwm txheej, txawm tias tsis sib xws, uas yog qhov tseem ceeb ntawm ntu kawg ntawm phau ntawv qhia no.

Yuav ua li cas engineers xaiv ntawm C-276 thiab Titanium rau ib tug muab txheej txheem ib puag ncig?

Cov kws ua haujlwm yuav tsum xaiv titanium Qib 2 thaum txheej txheem ib puag ncig muaj kev ntseeg siab thiab tsis tu ncua oxidizing, tsis muaj kev ntseeg siab ntawm kev txo qis kev ntxhov siab, thiab yuav tsum xaiv Hastelloy C-276 thaum ib puag ncig txo qis, sib xyaw, ua rau muaj kev ntxhov siab, lossis tsuas yog tsis muaj kev ntseeg siab - kho C-276 raws li kev zam txim ntau dua, kev tsis ntseeg siab ntau dua.

Ib lub tswv yim kev txiav txim siab:

1. Characterize ntau yam ntawm cov txheej txheem tiag tiag,tsis yog tus qauv tsim chemistry nkaus xwb - suav nrog kev pib, kaw, thiab cov xwm txheej ntxhov siab uas tuaj yeem qhia txog kev txo qis ib ntus.
2. Txaus siab rau titanium thaum ib puag ncig muaj kev ntseeg siab thiab tsis tu ncua oxidizing- chlorine ntub dej, hypochlorite, oxidizing chloride brines - thiab qhov twg qhov hnyav thiab tus nqi zoo tuaj yeem ntes tau.
3. Txaus siab rau C-276 thaum txo cov kua qaub tshwm sim, ua tau, lossis tsis paub tseeb,muab titanium qhov tsis txaus ntseeg tiag tiag hauv tsoomfwv tshwj xeeb thiab C-276 qhov kev ntseeg dav dav thoob plaws ob qho tib si oxidizing thiab txo cov chemistry.
4. Ntsuam xyuas qhov crevice geometry thiab kub, qis -pH brine tej yam kev mob ua tib zoo rau titanium tshwj xeeb,txij li qhov no yog titanium qhov kev ua tau zoo tshaj plaws hauv cheeb tsam txawm tias nyob rau hauv kev pabcuam chloride feem ntau.
5. Ntsuas tag nrho cov nqi nruab, tsis yog tus nqi raw khoom ib leeg,txij li thaum titanium qhov hnyav hnyav zoo tuaj yeem hloov qhov kev sib piv ntawm kev lag luam muaj txiaj ntsig ib zaug cov qauv, kev teeb tsa, thiab kev tuav cov nqi suav nrog.

Cov lus nug nquag

titanium Qib 2 puas tuaj yeem siv tau zoo yog tias cov txheej txheem qee zaum pom luv luv txo cov kev ntxhov siab?

Qhov no yuav tsum tau ceev faj, daim ntawv thov -kev ntsuas tshwj xeeb es tsis yog qhov kev xav ntawm kev nyab xeeb; Txawm hais tias luv luv raug rau qhov txaus ntshai txo qis tuaj yeem cuam tshuam titanium's passive zaj duab xis, yog li cov txheej txheem nrog txhua qhov kev ntseeg siab txo qis kev pheej hmoo feem ntau lav yog ib qho kev xaiv ntau dua li C-276 los yog cov ntaub ntawv pov thawj, kev soj ntsuam ntawm qhov xwm txheej ntxhov siab qhov hnyav thiab lub sijhawm.

Puas yog titanium Qib 2 raug rau hydrogen embrittlement?

Yog lawm, nyob rau hauv qee yam xwm txheej - titanium tuaj yeem nqus tau hydrogen raws li kev txo qis, cathodic, lossis siab dua - qhov kub thiab txias, uas tuaj yeem ua rau embrittlement; qhov no yog ib qho tiag tiag, alloy-kev txiav txim siab tshwj xeeb txawv ntawm C-276 tus cwj pwm kev xeb dav dav thiab yuav tsum tau soj ntsuam rau txhua daim ntawv thov uas muaj kev tiv thaiv cathodic, galvanic coupling, lossis hydrogen-generating txheej txheem chemistry.

Puas yog Hastelloy C-276 puas ua tsis tau titanium hauv oxidizing chloride ib puag ncig?

Hauv qee qhov kev mob oxidizing chloride, titanium lub zog ua kom muaj zog tuaj yeem ua tau zoo tshaj C-276's, uas yog ib feem ntawm vim li cas titanium feem ntau yog qhov nyiam, tsis yog txaus, xaiv hauv cov ntawv thov xws li cov tshuaj chlorine ntub dej; qhov kev sib piv yog tiag tiag nyob ze rau ntau qhov xwm txheej oxidizing, nrog tus nqi thiab qhov hnyav feem ntau dhau los ua qhov kev txiav txim siab ua tau zoo dua li qhov sib txawv ntawm corrosion-resistant.

C-276 thiab titanium cov khoom puas tuaj yeem siv ua ke hauv tib lub cev?

Yog lawm, thiab qhov no yog ib qho kev xyaum ua - xaiv titanium rau qhov kom meej oxidizing seem ntawm cov txheej txheem thiab C-276 rau cov seem uas txo los yog tsis meej chemistry, txawm tias galvanic compatibility ntawm ob cov ntaub ntawv yuav tsum raug soj ntsuam rau ib qho kev sib txuas ncaj qha los yog hluav taws xob txuas ntxiv, zoo ib yam li galvanic compatibility hauv paus ntsiab lus sib tham nyob rau hauv lwm yam kev qhia ntawm bolts.

Puas yog titanium Qib 2 haum rau siab - kev pabcuam kub, lossis tsuas yog nyob ze - tej yam kev mob?

Titanium Qib 2 qhov ua tau zoo ntawm qhov ntsuas kub rau aqueous chloride kev pabcuam feem ntau txwv tsis pub tshaj C-276's, thiab nws qhov kev ua tau zoo tuaj yeem ua rau qis dua ntawm qhov kub siab dua, tshwj xeeb tshaj yog ua ke nrog pH qis lossis crevice tej yam kev mob, yog li siab dua -kub daim ntawv thov warrant ze dua kev soj ntsuam ntawm nws cov titanium{4} qhov kev txwv tshwj xeeb oxidizing-chloride kev ua tau zoo txuas ntxiv tsis hloov mus rau qhov kev pabcuam kub.