Txhim kho ntawm Kev Tiv Thaiv -corrosion Txheej Tshuab thiab Kev Tiv Thaiv Kev Tiv Thaiv Kev Tiv Thaiv Kev Tiv Thaiv rau Cov mos txwv Clips
Dab tsi yog qhov tsis xws luag ntawm cov tsoos kub -dip galvanized txheej ntawm elastic strips thiab cov teeb meem ua tsis tiav yog dab tsi?
Lub ntsiab tsis xws luag ntawm cov tsoos kub-dip galvanized txheej ntawm elastic strips muaj xws li tsis sib xws zinc txheej thickness, susceptibility rau hydrogen embrittlement, thiab txwv corrosion kuj. Lub zinc txheej thickness sib txawv tuaj yeem ncav cuag ± 5μm, thiab qhov chaw nrog cov zinc txheej hauv zos nyias muaj nyias qhov kev nyiam corrosion, txo qhov kev tiv thaiv tag nrho -corrosion lub neej ntawm elastic strips. Thaum lub sij hawm kub -dip galvanizing txheej txheem, cov elastic strips yog immersed nyob rau hauv siab - kub zinc kua, uas yuav nqus hydrogen atoms, ua rau hydrogen embrittlement, txo cov tawv ntawm elastic strips, thiab ua rau lawv yooj yim rau nkig tawg nyob rau hauv lub log -rail vibration loads. Cov tshuaj tsw qab ntsev ntawm cov kub-dip galvanized txheej tsuas yog kwv yees li 500 teev, uas tsis tuaj yeem ua tau raws li lub sijhawm ntev - tiv thaiv -corrosion xav tau ntawm ntug dej hiav txwv thiab ntsev-alkali thaj chaw. Tom qab zinc txheej yog corroded, liab xeb yuav tsim, ntxiv accelerating corrosion ntawm elastic strips. Cov teeb meem tsis ua hauj lwm los ntawm cov teeb meem no suav nrog txo qhov kev tiv thaiv kev tiv thaiv -corrosion lub neej ntawm elastic strips mus rau 5-8 xyoo, qis dua qhov tsim lub neej ntawm 15 xyoo; brittle fractures ntawm elastic strips tshwm sim los ntawm hydrogen embrittlement, uas hnyav hem kev nyab xeeb tsav tsheb; zinc txheej shedding pollutes khiav Circuit Court thiab ua rau teeb liab faults. Cov txheej txheem kub-dip galvanized tsis tuaj yeem ua tau raws li daim ntawv thov kev xav tau ntawm ib puag ncig corrosive heev, thiab txheej txheej txheej txheem kev txhim kho yuav tshwm sim.
Dab tsi yog qhov zoo tshaj plaws thiab cov txheej txheem tswj cov ntsiab lus ntawm Dacromet txheej rau elastic strips?
Cov kev zoo ntawm Dacromet txheej rau elastic strips yog pom nyob rau hauv peb lub hauv paus ntsiab lus: siab corrosion kuj, tsis muaj hydrogen embrittlement txaus ntshai, thiab zoo txheej uniformity. Cov tshuaj tsw qab ntsev ntawm Dacromet txheej tuaj yeem ncav cuag ntau dua 1000 teev, ob zaug ntawm kub -dip galvanizing, thiab tuaj yeem tiv taus qhov corrosive ib puag ncig hauv ntug dej hiav txwv thiab ntsev- thaj chaw alkali. Dacromet txheej siv txheej txheej - txheej txheem ci yam tsis muaj siab - qhov kub thiab txias, zam kev nqus ntawm hydrogen atoms, tshem tawm qhov kev pheej hmoo ntawm hydrogen embrittlement, thiab ua kom lub zog thiab qaug zog ntawm cov elastic strips. Cov txheej tuab yog sib txawv nrog qhov sib txawv tsawg dua lossis sib npaug li ± 2μm, uas tuaj yeem npog nyuaj - rau - phaj ntu xws li cov ces kaum thiab qhov khoob ntawm cov hlua elastic, ua tiav tag nrho - nto tiv thaiv - corrosion nrog siab sib xws ntawm kev tiv thaiv - cov nyhuv corrosion. Cov txheej txheem tswj cov ntsiab lus tseem ceeb yog tswj hwm qhov sib piv ntawm cov txheej slurry, thiab qhov piv ntawm zinc{15}} txhuas hmoov rau khi yuav tsum raug tswj kom raug ntawm 7: 3 kom ntseeg tau tias qhov adhesion thiab corrosion kuj ntawm txheej. Lub ci kub yog tswj ntawm 300-320 degree, thiab lub sijhawm tuav yog 15-20 feeb kom kho cov txheej txheem thiab tsim cov txheej txheem zinc-aluminium sib xyaw. Ua ntej txheej, qhov saum npoo ntawm lub elastic strip yuav tsum tau txhaj tshuaj-peened, thiab qhov saum npoo roughness yog tswj ntawm Ra1.5-2.0μm los txhim kho lub zog sib txuas ntawm cov txheej thiab cov substrate, nrog rau adhesion ntau dua los yog sib npaug rau 5MPa.
Dab tsi yog qhov sib xyaw ua ke los tiv thaiv-corrosion txheej txheej txheej rau elastic strips hauv ntug dej hiav txwv siab-cov av noo ntsev tsuag ib puag ncig?
Elastic strips nyob rau hauv cov ntug dej hiav txwv siab -cov av noo ntsev tsuag ib puag ncig txais kev sib xyaw los tiv thaiv -corrosion scheme ntawm "Dacromet txheej + sealing txheej". Dacromet txheej yog txheej hauv qab kom muab ntev - lub sij hawm cathodic tiv thaiv, thiab txheej sealing ua hauj lwm raws li txheej saum toj kawg nkaus cais cov nkag mus ntawm dej vapor thiab ntsev tsuag. Kev tiv thaiv ob npaug zoo txhim kho kev tiv thaiv -corrosion kev ua tau zoo. Lub thickness ntawm Dacromet txheej yog tswj ntawm 8-12μm kom ntseeg tau tias cov nyhuv cathodic tiv thaiv. Cov txheej txheej sealing yog ua los ntawm cov khoom siv polyurethane nrog lub thickness ntawm 5-8μm, uas muaj cov dej tsis zoo thiab cov tshuaj tsuag ntsev. Cov tshuaj tsw qab ntsev ntawm cov txheej txheem sib xyaw tuaj yeem ncav cuag ntau dua 2000 teev, uas tuaj yeem tiv taus qhov siab -cov av noo ntsev tsuag corrosion nyob rau hauv cov ntug dej hiav txwv. Lub neej tiv thaiv corrosion ntawm lub elastic strip yog txuas mus rau ntau tshaj 20 xyoo, deb tshaj qhov tsim lub neej. Txhawm rau txhim kho kev tiv thaiv kev tiv thaiv ntxiv, kev tiv thaiv corrosion sealant tau ntim rau hauv qhov khoob ntawm lub elastic strips. Lub sealant yog ua los ntawm cov khoom siv silicone, uas muaj qhov zoo elasticity thiab corrosion kuj, tiv thaiv cov ntsev tsuag los ntawm invading los ntawm qhov khoob. Cov txheej txheem txheej txheej yuav tsum raug txheeb xyuas los ntawm kev ntsuas kev sib txhuam nrawm kom simulate 50-xyoo corrosive ib puag ncig hauv cov ntug dej hiav txwv kom ntseeg tau tias cov hlua khi elastic tsis muaj qhov pom tseeb corrosion. Tom qab kev teeb tsa, qhov kev ncaj ncees ntawm cov txheej yuav tsum tau kuaj xyuas tas li, thiab cov txheej txheem puas tsuaj yuav tsum tau kho kom raws sijhawm kom tsis txhob muaj kev sib kis hauv zos.
Dab tsi yog qhov kev tiv thaiv- xeb thiab tiv thaiv- khov heave txheej txheej txheej txheej txheej txheej txheej txheej txheej txheej txheej txheej txheej txheej txheej elastic strips hauv saline- thaj tsam alkali permafrost?
Elastic strips nyob rau hauv saline-alkali permafrost cheeb tsam txais yuav ib tug tshwj xeeb los tiv thaiv-corrosion scheme ntawm "zinc{2}}chromium txheej + anti- khov heave buffer txheej". Lub zinc-chromium txheej muaj saline zoo heev-alkali tsis kam, tuaj yeem tiv taus qhov yaig ntawm saline-alkali ions hauv av, muaj cov tshuaj ntsev ntsev ntau dua lossis sib npaug li 1500 teev, thiab tiv thaiv- lub neej corrosion ntau dua lossis sib npaug li 15 xyoo. Lub anti{13}} khov heave buffer txheej yog ua los ntawm polytetrafluoroethylene cov ntaub ntawv nrog ib tug tuab ntawm 3-5μm, uas muaj zoo low-kub toughness, tsis ua nkig ntawm -40℃nyob rau hauv permafrost ib puag ncig, thiab muaj peev xwm nqus tau cov deformation los ntawm coatings permafrost. Cov txheej txheem tseem ceeb tswj cov ntsiab lus ntawm zinc-chromium txheej yog tswj pH tus nqi ntawm 5.5-6.5 kom tsis txhob xeb ntawm elastic strip substrate los ntawm muaj zog acids thiab alkalis, thiab cov txheej txheej curing kub yog tswj ntawm 280℃los xyuas kom meej lub compactness ntawm txheej. Cov txheej txheem tiv thaiv - khov heave buffer yog siv los ntawm electrostatic txau, sib npaug ntawm qhov chaw ntawm zinc-chromium txheej, nrog lub zog sib txuas ntau dua lossis sib npaug li 3MPa nrog cov substrate los tiv thaiv cov txheej txheem tsis txhob poob thaum lub sijhawm khov thiab thawing. Cov txheej txheem txheej txheem no yuav tsum dhau qhov qis-kub khov- thaw lub voj voog sim simulate lub voj voog khov-thaw txhua xyoo hauv thaj chaw permafrost. Tom qab kev ntsuam xyuas, cov txheej txheej elastic strip tsis muaj qhov tawg lossis tev, thiab kev ua haujlwm tiv thaiv corrosion tsis muaj qhov pom tseeb poob. Tsis tas li ntawd, kev teeb tsa ntawm elastic strips yuav tsum tau txais kev tiv thaiv kev tiv thaiv heave anchoring thev naus laus zis kom tsis txhob muaj kev hloov pauv elastic los ntawm permafrost khov thiab thawing, ua kom ruaj khov kev ua haujlwm.
Dab tsi yog cov khoom tseem ceeb thiab kev lees paub rau kev ntsuas kev ua haujlwm ntawm elastic strip los tiv thaiv -corrosion coatings?
Cov khoom tseem ceeb ntawm kev ntsuas kev ua tau zoo ntawm elastic strip anti-corrosion coatings muaj xws li plaub pawg: ntsev tsuag tshuaj tiv thaiv, adhesion, cuam tshuam tsis kam, thiab qis -kub tsis kam. Cov ntsev tsuag tsis kam txais cov tshuaj ntsev nruab nrab. Raws li cov kev sib txawv ntawm ib puag ncig, lub sij hawm yuav tsum tau ntsev tsuag tshuaj tiv thaiv yog ntau dua los yog sib npaug rau 500 teev (ib txwm - kab nrawm), Ntau dua los yog sib npaug rau 1000 teev (siab- kab tsheb ciav hlau ceev), thiab Ntau dua lossis sib npaug li 2000 teev (cov ntug hiav txwv). Qhov kev kuaj adhesion siv tus ntoo khaub lig-txoj kev txiav. Tsis muaj kev puas tsuaj tom qab txheej txheej hla- txiav, thiab qib adhesion yog ntau dua lossis sib npaug li 1 kom ntseeg tau tias cov txheej txheem tsis poob rau hauv kev vibration loads. Qhov kev ntsuam xyuas qhov cuam tshuam tau txais qhov kev ntsuas qhov hnyav poob nrog lub zog cuam tshuam ntau dua lossis sib npaug rau 5J. Tom qab muaj kev cuam tshuam, txheej txheej tsis muaj qhov tawg lossis tawg, ua kom haum rau qhov cuam tshuam ntawm lub log{17}}rail kev co. Qhov qis- qhov ntsuas kub tsis kam lees txais qhov qis- ntsuas kub chav ntsuas. Tom qab tuav ntawm -40℃rau 24 teev, txheej txheej tsis muaj qhov tawg lossis tawg, ua tau raws li daim ntawv thov xav tau ntawm thaj chaw alpine. Cov qauv kev lees paub yog: tag nrho cov khoom kuaj tau tsim nyog, cov txheej txheej tuab yog sib txawv nrog qhov sib txawv tsawg dua lossis sib npaug ntawm ± 2μm, thiab qhov saum npoo tsis muaj qhov tsis xws luag xws li npuas, pinholes, thiab sagging. Rau cov txheej txheem sib xyaw, cov kev sib txuas sib txuas yuav tsum tau sim, nrog rau kev sib txuas ua ke Ntau dua lossis sib npaug ntawm 2MPa txhawm rau tiv thaiv kev sib tsoo. Kev tsim nyog elastic strips yuav tsum tau muab nrog cov txheej txheem kev ntsuas kev ua tau zoo thiab suav nrog hauv cov khoom lag luam zoo traceability kom ntseeg tau tias kev ua haujlwm tiv thaiv corrosion ua tau raws li tus qauv.