Tsim cov stray alternating tam sim no raug ib puag ncig
Electroplating, electrolytic oxidation thiab lwm yam electrified ntub cov txheej txheem tsim cov dej ntws ntws tawm mus thoob plaws hauv lub tank kho. Stray tam sim no tsim tsis tu ncua hloov anodic thiab cathodic micro-zones ntawm submerged rhaub. Ionic kua tsim cov nruab nrab nruab nrab ntawm cov khoom siv hauv lub tank thiab cov khoom siv cua sov. Feem ntau cov cuab yeej ntsuas kev laus tsom mus rau tshuaj lom neeg thiab kev tawm tsam, tsis quav ntsej electrochemical micro- cov tshuaj tiv thaiv uas tau tsav los ntawm kev cuam tshuam tam sim no. Degradation concentrates ntawm cov kua - sheath tiv thaiv ciam teb thiab maj mam zuj zus yam tsis muaj kev ceeb toom thaum ntxov.
| Kev ua haujlwm | Stray tam sim no ceev & hloov zaus ntawm polarity | Thawj degradation tshwm sim | Risk theem |
|---|---|---|---|
| Tsawg stray tam sim no ceev, tsis tshua muaj polarity hloov | Tsis muaj zog hloov hluav taws xob hluav taws xob cuam tshuam, txwv kev cuam tshuam cuam tshuam | Tsis muaj kev puas tsuaj mus tas li rau sheath matrix | Tsawg |
| Nruab nrab ruaj khov tam sim no, tsis tu ncua polarity alternation | Nruam micro-electrochemical cov tshuaj tiv thaiv ntawm lub plhaub | Progressive tiam ntawm tawg subsurface microvoids | Nruab nrab |
| High stray tam sim no ceev, nquag ceev polarity thim rov qab | Intensified cyclic interfacial ion migration thiab cov tshuaj tiv thaiv | Kev tsim sai ntawm interconnected penetrating microcracks | Siab |
Degradation mechanism induced los ntawm alternating stray tam sim no
Hloov anodic thiab cathodic micro- cheeb tsam tsav rov ua kom muaj zog thiab depletion ntawm yaj ions ntawm PTFE sheath interface. Ion tsiv teb tsaws tsis tu ncua cuam tshuam rau saum npoo molecular qauv thiab ua kom muaj qhov cuam tshuam me me ntawm micro- qhov tsis haum. Yog tsis muaj stray tam sim no, ions faib tusyees thiab sib cuam tshuam me ntsis nrog lub polymer nto. Static ib leeg-polarity stray tam sim no tsuas yog tsim cov tshuaj tiv thaiv ib cheeb tsam; alternating polarity ua rau reciprocating ion txuam thiab desorption. Lub cyclic ion poob siab loosens nto intermolecular bonding thiab nthuav cov me me tsis xws luag. Thaum ntxov interfacial discoloration yog yooj yim them los ntawm inorganic fouling thiab overlooked thaum lub sij hawm patrols.
Coupled multi-factor tsis ua hauj lwm evolution tshwm sim los ntawm stray tam sim no electrochemical kev txiav txim
Microvoids nthuav dav los ntawm cyclic ion tsiv teb tsaws los ua qhov chaw cia rau cov khoom siv electrolytes. Kev kub ceev kev caij tsheb kauj vab ua rau cov dej ntsev siv lead ua los nag hauv cov kab noj hniav hauv qab, thiab kev ntxhov siab ua rau cov microcracks ntxaum mus rau cov cua sov sab hauv. Heterogeneous deg kev ncaj ncees cuam tshuam cov kev hloov pauv thaum tshav kub kub thiab ua rau cov hotspots zais cia kom nrawm cov saw hlau polymer degradation. Megohmmeter rwb thaiv tsev tsis kam poob qis tshaj plaws ntawm cov cheeb tsam uas raug cuam tshuam rau tam sim no muaj zog. Cov kws kho kev tu vaj tse feem ntau ua rau cov ntaub qhwv degradation rau cov electrolyte corrosion, tsis tshua pom kev hloov pauv tam sim no raws li qhov tseem ceeb nrawm.
Feem ntau tsis tsim nyog ntawm - qhov chaw tuav ntawm cov teeb meem tam sim no cuam tshuam
Cov tshuab hluav taws xob tsim hluav taws xob tsis muaj qhov ua kom zoo tshaj plaws hauv av thiab kev cuam tshuam tam sim no ntsuas. Tom qab cov khoom siv hluav taws xob puas ua haujlwm tsis zoo, cov neeg ua haujlwm hloov khoom siv yam tsis muaj kev txhim kho circuit shielding lossis tank peev xwm sib npaug. Cov cua sov tshiab tseem yuav raug cuam tshuam rau kev hloov pauv tam sim no thiab raug kev txom nyem los ntawm kev sib cuam tshuam ntawm kev sib tshuam. Ob peb tsis ua hauj lwm tsom xam qhia paub qhov txawv ntawm cov tshuaj dawb huv los ntawm electrochemically accelerated sheath ageing. Hauv paus-ua rau kev tsom xam feem ntau misclassifies heterogeneous nto puas raws li random sediment abrasion.
Targeted optimization kev daws teeb meem thiab tshuaj xyuas-qhia kev ua haujlwm
Ua raws li kev txhim khu kev qha equipotential grounding thiab shielding ntsuas los tswj cov stray tam sim no nyob rau hauv lub tank. Optimize electrode layout kom txo tau qhov tsis sib xws tam sim no faib nyob ib ncig ntawm lub tshuab cua sov. Teem sij hawm tshuaj ntxuav tu kom tshem tawm ion- ua kom muaj cov crystalline deposits txuas rau hauv cov tawv nqaij. Thaum lub sij hawm hloov kho loj, tshem tawm tag nrho cov fouling thiab tshuaj xyuas cov npoo ntawm cov ntaub qhwv -zoo li heterogeneous degradation kab. Taug qab ntev -lub sij hawm megohmmeter rwb thaiv tsev tsis kam. Yog tias rov ua tsis tiav tshwm sim ze rau cov electrodes ua haujlwm, ntsuas qhov kev faib tawm tam sim no ntawm -site. Rau electrolytic ua cov kab ntau lawm, ua kom lub sij hawm luv luv ntsuas ntsuas zaus.
Economic tus nqi ntawm suppressing stray tam sim no coupled deterioration
Kev txwv tsis pub hloov pauv tam sim no txo qis kev cuam tshuam ntawm kev sib cuam tshuam ion tsiv teb tsaws thiab ua rau qeeb micro- tsis xws luag ntawm PTFE lub rhaub plhaub. Maintaining dense intact sheath structure blocks deep penetration of corrosive electrolytes and interrupts cascading chemo-mechanical ageing including crystal wedging and hotspot degradation. Tsawg dua lub tshuab cua sov ua ntej lub sijhawm hloov ua kom lub sijhawm teem sijhawm thiab txo qis nyiaj txiag los ntawm kev kaw qhov khoom tsis tau npaj tseg. Kev sib pauv kub ruaj khov ua kom muaj qhov kub thiab txias ib puag ncig ionic, txo cov kev pheej hmoo ntawm kev hloov pauv thiab cov khoom seem hauv cov khoom ntub dej tas li -batch chemical manufacturing.
