Qhov Kev Pabcuam tiag tiag ntawmTri-Cov teeb pom kev zoo nyob rau hauv Chemical Corrosion Ib puag ncig
Tri-cov teeb pom kev zoo, tsim los tiv thaiv dej, plua plav, thiab xeb, tau siv dav hauv cov chaw hnyav xws li cov nroj tsuag tshuaj, pas dej da dej, thiab cov chaw kho dej khib nyiab. Txawm li cas los xij, lawv qhov kev ua tau zoo nyob rau hauv qhov chaw muaj tshuaj lom neeg muaj zog heev-tshwj xeeb yog cov tshuaj chlorine-nplua nuj tej yam kev mob- tseem yog ib qho kev txhawj xeeb tseem ceeb rau kev lag luam uas vam khom lub teeb pom kev zoo. Lub neej ua haujlwm tiag tiag ntawm cov teeb no hauv ib puag ncig yog cuam tshuam los ntawm kev sib cuam tshuam ntawm cov ntaub ntawv tshawb fawb, ib puag ncig, thiab kev saib xyuas kev ua haujlwm, feem ntau sib txawv ntawm cov chaw tsim khoom- ntsuas lifespans.
Chlorine, uas muaj zog oxidizing tus neeg sawv cev, ua rau muaj kev hem thawj rau tri-cov pov thawj teeb. Nyob rau hauv daim ntawv gaseous los yog ua ib feem ntawm aqueous tov (xws li, chlorine-raws li tshuaj tua kab mob), nws reacts nrog hlau, yas, thiab cov nplaum, maj mam degrading lawv cov qauv thiab kev ua haujlwm zoo. Thaum tus qauv tri- cov teeb pom kev zoo tuaj yeem thov 5,000–10,000-teev kev ua neej nyob hauv cov xwm txheej nruab nrab, lawv cov kav ntev plummets hauv chlorine ib puag ncig, feem ntau suav nrog1,000 txog 3,000 teev ua haujlwm yam tsis muaj kev ntsuas ntsuas.Qhov kev txo qis no tshwm sim los ntawm peb lub hauv paus mechanisms: cov khoom yaig, foob degradation, thiab hluav taws xob tiv thaiv tsis ua haujlwm.
Kev xaiv cov khoom siv yog qhov tseem ceeb rau kev ua haujlwm ntev. Lub teeb tsim los ntawm 316 stainless hlau, paub txog nws cov tshuaj tiv thaiv chloride-induced pitting, ua tau zoo dua cov uas siv 304 stainless hlau los ntawm 20-30% hauv chlorine- nplua nuj nqis. Ib yam li ntawd, cov ntaub ntawv vaj tsev zoo li ETFE (ethylene tetrafluoroethylene) los yog PTFE (polytetrafluoroethylene) muaj cov tshuaj lom neeg zoo dua piv rau cov qauv polycarbonate, uas tuaj yeem tawg lossis tawg hauv lub hlis ntawm kev raug cov pa chlorine. Txawm tias muaj kev cuam tshuam me me hauv cov khoom zoo-xws li plating nyias ntawm cov hlau los yog qis-qib gaskets- nrawm nrawm, ua rau ua tsis tiav ntxov.
Environmental parameters ntxiv dictate ntev.Chlorine concentration yog qhov sib txawv tseem ceeb:ib puag ncig nrog kev cuam tshuam tsis tu ncua rau 50+ ppm chlorine gas (ib txwm nyob rau hauv cov txheej txheem chlorination) txo lub teeb lub neej txog li 50% piv rau kev sib cuam tshuam, qis - concentration raug (xws li, thaj chaw da dej nrog 1-5 ppm). Cov kub hloov pauv ua rau qhov teeb meem no ntau dua; cyclic cua sov thiab cua txias ua rau cov ntaub ntawv nthuav dav thiab cog lus, ua rau cov ntsaws ruaj ruaj tsis muaj zog thiab tsim cov microcracks uas tso cai rau cov neeg ua haujlwm corrosive nkag mus rau lub teeb sab hauv. Thaum cov dej noo los yog chlorine infiltrates, cov khoom siv sab hauv xws li LEDs, tsav tsheb, thiab cov hlua hluav taws xob corrode sai, feem ntau ua rau flickering, dimming, los yog ua tiav kaw.
Cov qauv tsim kuj ua lub luag haujlwm tseem ceeb. Tri-cov ntaub ntawv pov thawj teeb nrog hermetic ntsaws ruaj ruaj, ob npaug - txheej gaskets (ua los ntawm Viton los yog EPDM), thiab du, crevice-dawb qhov chaw txo cov tshuaj chlorine thiab tsub zuj zuj. Hloov pauv, cov chav tsim tsis zoo nrog cov sib tshooj sib tshooj los yog cov khoom sib txuas ua ke ua cov khoom siv corrosion, qhov chaw chlorine residues sib sau thiab ua kom cov khoom tawg. Tsis tas li ntawd, cov teeb pom kev zoo uas muaj lub tshuab ua pa tawm kom tshem tawm cov pa corrosive zoo li yuav ua rau cov qauv siv tsis zoo, vim lawv txo qis kev cuam tshuam ntev rau cov neeg ua phem.
Kev saib xyuas zoo tuaj yeem txuas ntxiv lub neej kev pabcuam. Kev tu kom tsis tu ncua kom tshem tawm cov chlorine deposits, tshuaj xyuas thiab hloov cov khoom siv degraded, thiab kev siv cov tshuaj tiv thaiv- cov txheej txheem corrosion (xws li ceramic lossis epoxy txheej) tuaj yeem ntxiv 500-1,000 teev ntawm kev ua haujlwm. Hauv cov chaw uas muaj cov tshuaj chlorine siab, teem sijhawm tiv thaiv kev saib xyuas txhua txhua 3-6 lub hlis yog qhov tseem ceeb, vim tias tsis tau kuaj xyuas corrosion feem ntau ua rau tsis pom zoo kom txog thaum ua haujlwm tsis ua haujlwm.
Hauv kev xaus, lub neej kev pab cuam tiag tiag ntawm tri-cov pov thawj teeb nyob rau hauv cov tshuaj lom neeg corrosion heev ib puag ncig zoo li chlorine- nplua nuj nqis yog luv luv dua li cov qauv, feem ntau yog li ntawm 1,000 txog 3,000 teev. Qhov kev ua neej no yog txiav txim siab los ntawm cov khoom siv tiv thaiv, kev siv ib puag ncig, kev tsim lub zog, thiab kev saib xyuas. Rau kev lag luam ua haujlwm hauv cov xwm txheej hnyav, kev nqis peev hauv qib siab - cov ntaub ntawv qib siab, ua ntej cov txheej txheem sealing zoo dua, thiab siv cov txheej txheem tswj xyuas nruj yog qhov tseem ceeb rau kev ua kom lub teeb ntev ntev thiab txo qis kev ua haujlwm poob qis. Raws li kev xeb tseem yog ib qho kev sib tw uas tsis tuaj yeem zam, kev nce qib hauv cov khoom siv science thiab engineering txuas ntxiv yuav thawb cov ciam teb ntawm tri- pov thawj teeb kev ua tau zoo hauv ntiaj teb qhov chaw xav tau tshaj plaws.
