Yuav ua li cas txiav txim siab yog tias tshuaj tua kab mob ua rau PTFE cua sov phaj tsis ua haujlwm?

Thaum lub phaj cua sov PTFE qhia pom tias qhov kev poob qis, xws li kev tsim hluav taws xob tsawg, kev ua txhaum hauv av, lossis pom qhov txawv txav, nws raug tshem tawm ntawm kev pabcuam. Cov qauv kev puas tsuaj tsis haum nrog kev cuam tshuam rau txhua yam (tsis muaj dents lossis gouges), hluav taws xob burnout (tsis muaj qhov chaw nyob hauv zos los yog cov khoom siv melted), los yog thermal overload (tsis muaj scorching lossis tawg). Qhov saum npoo, ntawm qhov tod tes, nthuav tawm txawm tias bleaching, nplua crazing, los yog me me pits. Thawj qhov uas los rau hauv siab yog: qhov no puas yog tshuaj tua kab mob? Yog tias muaj, cov tshuaj twg tau siv thiab nyob rau hauv cov xwm txheej twg? Txhawm rau kom tsis txhob kwv yees, nrhiav qhov laj thawj tseem ceeb, thiab muab tso rau hauv cov kauj ruam los ua kom cov phiaj xwm yav tom ntej muaj kev nyab xeeb, cov kws paub txog kev saib xyuas thiab kev ntseeg siab xav tau cov txheej txheem kev soj ntsuam tsis ua tiav.

Kauj Ruam 1: Saib qhov kev puas tsuaj thiab txheeb xyuas qhov ua rau nws. Pib nrog saib zoo sab nraud ntawm lub teeb ci, lub kaum sab xis thiab nrog qis - lub hwj chim magnifying iav (10 × – 30 ×). Nqa cov duab ntawm txhua qhov tshwj xeeb, suav nrog cov ntawv teev lus teev thiab cov cim rau kev taw qhia. Tshawb xyuas:

Cov tsos mob ntawm cov tshuaj tua kab mob dav dav uas ua rau lub teeb tawg los ntawm kev tsim cov micro-voids thiab hloov cov crystallinity yog cov xim dawb los yog chalkiness thoob plaws hauv qhov chaw ntub dej.

Localized pitting los yog ntiav erosion qhia tau hais tias cov tee dej los yog splashes tsoo lub nto sai sai, tab sis dua, nyob rau hauv uas concentrated chemicals tuaj rau hauv kov nrog nws.

Zoo, txuas nto tawg los yog crazing txhais tau hais tias cov khoom tau dhau los ua nkig vim saws tes. Qhov no feem ntau pom nrog kev ntxhov siab ntawm cov npoo lossis cov ntsiab lus mounting.

Tsis muaj mechanical deformation, yog li tsis muaj kev cuam tshuam. Kuj tsis muaj qhov sib sib zog nqus melting lossis charring, yog li tsis muaj qhov kub dhau heev.

Nyob rau hauv lub neej tiag tiag, thawj qhov taw qhia feem ntau yog cov qauv ntawm kev puas tsuaj, txij li kev tawm tsam tshuaj lom neeg feem ntau ua rau muaj kev hloov pauv uas zoo ib yam, thaum kev puas tsuaj rau cov khoom siv hauv zos ntau dua. Kev tawm tsam tshuaj lom neeg tsis feem ntau tsim cov ciam teb tshwj xeeb tshwj tsis yog tias qhov kis tau zoo nyob hauv ib cheeb tsam, xws li hauv vapor condensation aav.

Kauj Ruam 2: Txheeb xyuas qhov chaw Daim Ntawv Qhia kev puas tsuaj raws li lub phaj zoo li cas thiab ntev npaum li cas nws raug rau cov txheej txheem. Kev puas tsuaj uas feem ntau nyob ntawm ntug lossis qhov chaw qis qhia tau hais tias cov kua corrosive yuav tau sib sau ua ke thaum lub sijhawm ua haujlwm lossis ntxuav. Kev puas tsuaj yog qhov phem tshaj plaws ntawm qhov chaw kub (pom los ntawm kev ntsuas thermal yav dhau los), uas qhia tias cov tshuaj tiv thaiv tau nce siab thaum kub nce. Kev puas tsuaj tsuas yog rau sab saum toj txhais tau hais tias cov tsiaj tsis hloov pauv tau tawm tsam nyob rau theem vapor. Thaum muab piv rau keeb kwm ntawm cov dej ua haujlwm, kev puas tsuaj dhau ntawm cov qib raug qhia pom tias tawg los yog fume raug, thaum kev puas tsuaj hauv qab qib qhia cov kua dej ntau. Qhov kev sib txuas spatial no txo ​​qis tus naj npawb ntawm cov neeg tuaj yeem tawm tsam.

Kauj Ruam 3: Saib cov tshuaj thiab keeb kwm ntawm cov txheej txheem Muab tso ua ke ib daim ntawv qhia tag nrho ntawm kev raug tshuaj lom neeg. Ua ib daim ntawv teev txhua yam uas kov lub phaj, suav nrog cov txheej txheem ua kua, tshuaj ntxuav, yaug dej, cov pa tawm hauv huab cua, thiab txhua qhov nchuav uas tshwm sim los ntawm kev sib tsoo. Xws li kev hloov pauv hauv pH, kub, thiab concentration. Saib ntawm lub cav chim siab rau tej yam xws li pH spikes, ntxiv oxidants, los yog kub overshoots uas tej zaum yuav muaj kev sib raug zoo txwv. Txawm tias kev mus ncig luv luv tuaj yeem pib kev puas tsuaj uas tshwm sim hauv cov xwm txheej tsis tu ncua. Tshawb xyuas nrog cov ntaub ntawv luam tawm PTFE compatibility, them nyiaj ntau dua rau qhov kub thiab txias - lub hnab ntim siab dua rau ib qho - cov qhab nia.

Kauj Ruam 4: Khaws cov ntaub ntawv thiab pov thawj kom nyab xeeb Ua ntej ntxuav lossis sib cais lub phaj, thaij duab ntawm ntau qhov kev xav. Khaws cov khoom tawg zoo li yog; tsis txhob muab pov tseg lossis ntxuav nws ntau dhau. Thaum lub phaj ua tsis tiav, nws yog ib qho yuam kev ib txwm muab pov tseg yam tsis tau taug qab qhov tsis raug. Chav ua tsis tiav yog qhov zoo tshaj plaws ntawm cov ntaub ntawv hais txog qhov ua yuam kev. Tau txais cov qauv ntawm cov txheej txheem dej los ntawm lub sij hawm tsis ua hauj lwm (yog tias koj tseem tuaj yeem pom lawv) thiab ib qho seem ntawm cov phaj phaj uas zoo li qub. Muab hnub tim, qhov chaw, thiab kev ua haujlwm rau txhua yam. Khaws cov ntaub ntawv ntawm kev saib xyuas keeb kwm uas qhia tau hais tias thaum twg lub kaw lus tau teeb tsa, thaum nws tau txais kev pabcuam, nws tau ntxuav ntau npaum li cas, thiab thaum twg nws tau kuaj xyuas zaum kawg.

Kauj Ruam 5: Kev sim ntau ntxiv thiab tham nrog cov kws tshaj lij Yog tias cov pov thawj pom thiab keeb kwm tsis muab cov lus teb meej, txav mus rau cov kev sim yooj yim uas tsis ua rau cov khoom puas. Cov no suav nrog ntsuas kev tiv thaiv kev tiv thaiv hluav taws xob (nws yuav tsum muaj ntau tshaj 100 MΩ ntawm 500 V DC), ntsuas qhov poob qis (piv rau hauv paus), thiab ntsuas qhov nyuaj (qhov Shore D poob txhais tau tias cov khoom tau dhau los ua nkig). Kom paub meej, xa cov phaj los yog cov khoom ntawm nws mus rau tus neeg tsim khoom lossis ib qho chaw kuaj dawb. Lawv tuaj yeem ua Fourier-hloov infrared spectroscopy (FTIR) txhawm rau nrhiav cov pab pawg ua haujlwm tshiab, scanning electron microscopy (SEM) txhawm rau saib cov qauv saum npoo, thiab kev tshuaj xyuas lub hauv paus kom paub seb hom tsiaj muaj dab tsi (piv txwv li, chlorine los ntawm chlorides lossis sulfur los ntawm oxidisers).

Kev tsom xam tsis ua tiav, kev tshuaj xyuas qhov muag, kev kuaj pom kev puas tsuaj, kev txheeb xyuas cov hauv paus hauv paus, thiab kev tiv thaiv kev ntsuas hloov ib qho xwm txheej rau hauv kev txawj ntse. Kev tshawb nrhiav pom tau tias muaj tshuaj tua kab mob tshwm sim, leej twg yuav yog tus neeg tawm tsam (oxidising acid, fluorinating tus neeg sawv cev, kab peroxide, thiab lwm yam), thiab dab tsi ua rau nws (kub mus ncig, concentration nce, lossis tsis ntxuav txaus). Tom qab ntawd, muaj cov kauj ruam uas yuav tsum tau ua kom tsis txhob tshwm sim dua, xws li tshuaj xyuas cov tshuaj sib xyaw ua ke, kev tswj cov txheej txheem nruj, txo qis kev ua haujlwm kub, lossis kho cov khoom siv kho dua tshiab. Kev xa cov phaj ua tsis tiav rau cov chaw tsim khoom lossis ib lub chaw kuaj kev ywj pheej rau kev kawm zoo yuav muab cov kev daws teeb meem meej rau koj rau qhov nyuaj lossis tsis txaus. Cov txheej txheem ntawm kev ua hauj lwm ua ke no feem ntau pom me ntsis synergistic los yog unrecorded impurities uas sab hauv tsom xam overlooks. Qhov no ua rau nws muaj peev xwm mus tas li tshem tawm ntawm hom tsis ua haujlwm hauv txhua lub tshuab cua sov.