PTFE vs Titanium Cua Kub Tubes: Xaiv cov khoom siv zoo rau cov tshuaj phem ib puag ncig

Koj tab tom ua cua sov sib tov ntawm nitric thiab hydrochloric acid. Zoo heev nyob rau hauv nitric acid, tab sis tsis nyob rau hauv hydrochloric. PTFE resists ob qho tib si, tab sis nws puas tuaj yeem siv qhov kub thiab txias? Txhawm rau xaiv ntawm ob lub siab no - cov ntaub ntawv ua tau zoo tsis yog txoj haujlwm txhais tau tias - nws yog ib qho kev ua haujlwm ntawm chemistry tshwj xeeb thiab kev ua haujlwm kub. "

Qhov no yog ib qho zoo rau kev siv tshuaj lom neeg cua sov. Thaum ob qho tib si PTFE thiab titanium cua sov raj raug suav hais tias yog cov kev xaiv zoo tshaj plaws, lawv sib txawv hauv cov txheej txheem corrosion uas txiav txim siab lawv qhov kev ua tau zoo. Kev nkag siab zoo ntawm qhov sib txawv no yog qhov tseem ceeb hauv kev xaiv cov khoom tsim nyog hauv qhov xwm txheej uas qhov kev ua tsis tiav tsis yog qhov kev xaiv.

Corrosion cwj pwm: ob txoj kev sib txawv

Titanium yog resistant rau corrosion vim hais tias ib tug ruaj khov oxide zaj duab xis, feem ntau titanium dioxide (TiO2), cov ntaub ntawv nyob rau saum npoo thiab nws tus kheej - kho. Qhov txheej txheej passive no ua haujlwm raws li kev thaiv kom muaj kev cuam tshuam ntxiv ntawm cov hlau hauv qab nrog cov nruab nrab ib puag ncig. Hauv cov xwm txheej oxidizing xws li nitric acid lossis chlorate daws, cov txheej txheem oxide no tau tsim los tas li, thiab yog vim li cas titanium thiaj li ruaj. Titanium cua sov raj yuav kav ntev nrog me ntsis degradation nyob rau hauv xws li tej chaw.

Tab sis nws yog qhov txwv ntawm titanium. Cov txheej oxide tsis ruaj khov dua hauv kev txo qis. Piv txwv li, hydrochloric los yog sulfuric acid. Kev tawg tshwm sim nyob rau hauv ib qho kev txwv tsis pub muaj peev xwm oxidizing txaus los txhawb nqa zaj duab xis thiab cov hlau hauv paus raug tawm tsam sai. Lub xub ntiag ntawm fluoride ions muab ib qho kev ua phem ntau dua. Fluorides, xws li hydrofluoric acid, ncaj qha tawm tsam thiab yaj cov oxide txheej, tshem tawm cov txheej txheem tiv thaiv loj ntawm titanium. Corrosion tuaj yeem txhim kho sai, qee zaum sai sai, tom qab qhov thaiv tau ua txhaum cai.

Ntawm qhov tod tes, PTFE ua haujlwm ntawm lub hauv paus ntsiab lus sib txawv. Nws tsis cia siab rau cov txheej txheem tiv thaiv lossis lwm yam passivation. Hloov chaw, nws cov qauv molecular txhais tau hais tias nws muaj cov pa roj carbon muaj zog - fluorine kev sib cuam tshuam uas ua rau nws tsis muaj zog nyob rau hauv ntau yam mob. PTFE yuav sawv ntsug rau oxidizing thiab txo cov kua qaub, nrog rau cov uas yuav tawm tsam titanium. PTFE tiv thaiv los ntawm nitric acid, hydrochloric acid, sulfuric acid thiab txawm hydrofluoric acid nyob rau hauv qhov tsim nyog kub.

Titanium yog tus kws tshaj lij hauv kev txhim kho corrosion. PTFE yog ib tug generalist. Titanium lub zog yog nws cov oxide zaj duab xis. PTFE lub zog yog tias nws tsis xav tau ib qho.

Kev Muaj Peev Xwm Kub: Kev Ua Lag Luam - tawm qhov xwm txheej

PTFE muaj unsurpassed tshuaj tiv thaiv, txawm hais tias nws muaj ib tug tshwj xeeb kev txwv ntawm kev khiav hauj lwm kub. PTFE cua sov raj feem ntau yog tsim los rau kev ua haujlwm tas mus li ntawm qhov kub txog 200-230 ° C. Saum toj no qhov teeb meem, cov khoom siv kho tshuab zoo pib deterioriate thiab lub sij hawm ntev kev ntseeg yog questionable.

Tab sis titanium tuaj yeem tuav nws cov duab ntawm qhov kub siab dua. Hauv ntau daim ntawv thov kev lag luam titanium cua sov cov raj tuaj yeem ua haujlwm nyab xeeb txog 300℃thiab hauv qee qhov kev tswj hwm txawm tias mus txog 400 degree. Cov cuab yeej no ua rau titanium nthuav dav heev rau cov txheej txheem kub kub uas muaj oxidizing acids qhov twg PTFE yuav tsis haum.

Qhov tshwm sim yog ib qho kev sib haum xeeb ntawm engineering classic. PTFE muaj ntau yam tshuaj sib xws tab sis nyob rau hauv lub qhov rais nqaim thermal. Titanium ua tau zoo dua thermally tab sis tsuas yog hauv qee qhov chaw tshuaj lom neeg.

Mechanical Aspects thiab Design Considerations

Lub zog txhua yam kuj pab ua kom sib txawv ntawm ob yam khoom. Titanium yog cov hlau uas muaj lub zog siab thiab cov qauv zoo. Nws tuaj yeem ua rau cov duab zoo sib xws, tiv thaiv kev ntxhov siab thiab ua haujlwm nyob rau hauv siab yam tsis muaj kev cuam tshuam zoo. Qhov no ua rau titanium cua sov raj tsim nyog rau kev thov kev siv, suav nrog cov tshuab hluav taws xob thiab cov qauv tsim hluav taws xob sib txuas.

Tab sis ntawm qhov tod tes, PTFE yog ib qho mos mos polymer. Chemically nws ua tau zoo heev, tab sis nws tsis muaj qhov tawv thiab lub zog los nqa loads zoo li hlau ua. " Ntev PTFE cua sov raj feem ntau txhawb sab nraud kom tsis txhob sagging lossis deformation, tshwj xeeb tshaj yog nyob rau hauv qhov kub siab.

Cov kev sib txawv ntawm cov khoom siv no cuam tshuam tsis yog tsuas yog cov kev xaiv ntawm cov khoom siv, tab sis kuj yog qhov tsim ntawm qhov system. PTFE systems feem ntau xav tau kev tsim vaj tsev ntau dua los tswj kev ruaj ntseg thiab kev ua siab ntev, thaum cov tshuaj titanium tuaj yeem ua kom muaj kev sib haum xeeb thiab kev sib koom ua ke ntau dua.

Daim Ntawv Thov Kev Qhia: Kev xaiv cov khoom siv rau txheej txheem

Thaum kawg, kev xaiv cov khoom siv yog ib lo lus nug ntawm kev sib piv lub zog ntawm txhua yam khoom siv rau ib puag ncig ntawm kev ua haujlwm tshwj xeeb. Nyob rau hauv kub kub oxidizing acid systems xws li cua sov nyob rau hauv concentrated nitric acid, titanium feem ntau yog cov khoom nyiam. Nws cov oxide zaj duab xis nyiam cov xwm txheej no thiab nws qhov kub thiab txias ua kom ntseeg tau ua haujlwm.

Los ntawm qhov sib txawv, titanium muaj kev cuam tshuam rau cov txheej txheem uas txo cov kua qaub, cov kua qaub sib xyaw lossis fluoride- muaj cov xov xwm. Kev sib xyaw ntawm hydrochloric acid, sulfuric acid nyob rau hauv tej yam kev mob thiab tej yam kev mob ntawm hydrofluoric acid tag nrho tilt tus tshuav nyiaj li cas xav tau ntawm PTFE. Raws li cov xwm txheej zoo li no, PTFE feem ntau tsis yog ib qho kev xaiv xwb, tab sis tsuas yog kev nyab xeeb thiab ntev - kev daws teeb meem.

Qhov sib txawv no tau pom zoo los ntawm cov xwm txheej sib xyaw ua kua qaub, xws li nitric -hydrochloric acid sib tov. Titanium yog passivated los ntawm nitric acid, thaum hydrochloric acid tshem tawm cov passive txheej. TSIS TXHOB cuam tshuam rau PTFE. Ob qho tib si tsim ib lub hnab ntawv ua haujlwm tsis tu ncua. (Raws li qhov ntsuas kub nyob hauv qhov PTFE ntau.

Tus nqi thiab tiag -World Trade- tawm

Piv rau cov khoom siv xws li cov hlau tsis muaj steel, ob qho tib si titanium thiab PTFE cua sov raj yog nyob rau ntawm qhov kawg siab dua. Tab sis kev ntsuas tus nqi yuav tsum tsis txhob tso tseg nrog kev yuav khoom thawj zaug. Titanium yog kim heev tab sis qhov kev ua tau zoo nws muab rau hauv qee qhov xwm txheej tuaj yeem tsim nyog tus nqi, tshwj xeeb tshaj yog thaum kub kub.

Nyob rau tib lub sijhawm, hauv daim ntawv thov corrosive heev uas lwm cov ntaub ntawv yuav tawg sai sai, PTFE feem ntau ua pov thawj pheej yig dua. Nws cov tshuaj tiv thaiv dav dav txo qis cov kev xav tau rau kev hloov pauv tsis tu ncua, tsis tau teem sijhawm downtime thiab kev ntsuas kev tiv thaiv corrosion. Txawm hais tias tus nqi khoom kim heev, PTFE muab tus nqi pheej yig dua ntawm kev ua tswv cuab hauv ntau cov dej num corrosive.

Cov ntsiab lus: Cov niches sib txawv, ua haujlwm ntxiv

Titanium thiab PTFE cua sov raj tsis hloov pauv tau, txawm hais tias lawv tau ntxiv cov kev daws teeb meem rau qee qhov chaw ua haujlwm. Dab tsi yog titanium siv rau? Titanium yog qhov zoo heev ntawm qhov kub thiab txias hauv qhov xwm txheej oxidizing uas nws tiv thaiv los ntawm oxide zaj duab xis thiab muaj cov khoom siv zoo. Ntawm qhov tsis sib xws, PTFE yog ib qho kev daws teeb meem thoob ntiaj teb rau cov xwm txheej hnyav xws li txo cov kua qaub, cov kua qaub sib xyaw thiab cov tshuaj fluoride uas muaj cov xov xwm.

Qhov kev xaiv ntawm ob qho tib si los ntawm kev paub txog koj cov txheej txheem chemistry thiab qhov kub koj yuav ua haujlwm li cas. Yog tias qhov kub xav tau tshaj qhov txwv ntawm polymers, titanium yuav yog qhov tsim nyog. PTFE muab unsurpassed kev ntseeg siab qhov twg tshuaj complexity qhia tsis paub tseeb los yog siab corrosiveness.

Kev xaiv cov khoom tsim nyog tsis yog ntau lo lus nug ntawm cov khoom "zoo dua", tab sis paub txog cov khoom siv uas haum rau qhov tseeb ntawm cov txheej txheem ib puag ncig.