Tsim thiab Lub Neej Cycle Corrosion Protection System rau Rail Transit Cheebtsam
Dab tsi yog yam tseem ceeb ntawm corrosion ntsib los ntawm kev thauj mus los Cheebtsam?
Cov no feem ntau muaj xws li: atmospheric corrosion, acid rain corrosion, ntsev tsuag corrosion (nqaij ntug dej hiav txwv thiab ntsev pas dej), tshuaj corrosion los ntawm de-icing agents (sab qaum teb lub caij ntuj no), electrochemical corrosion los ntawm av thiab av, stray tam sim no corrosion (metro thiab lub teeb rail), crevice corrosion (bolt thiab clamp mating nto), thiab qaug zog corrosion (cov nyhuv ntawm corrosion). Cov cheeb tsam sib txawv yog dominated los ntawm ntau hom corrosion. Piv txwv li, cov chaw ntug dej hiav txwv feem ntau cuam tshuam los ntawm cov tshuaj tsuag ntsev, thaj tsam sab qaum teb los ntawm de- cov kab mob icing, thiab cov cheeb tsam yav qab teb los ntawm siab - kub thiab siab - av oxidation. Metros feem ntau cuam tshuam los ntawm kev cuam tshuam tam sim no, xav tau cov phiaj xwm tiv thaiv -corrosion systems.
Dab tsi yog qhov muaj feem cuam tshuam thiab kev sib piv ntawm lub neej ntawm kev siv los tiv thaiv - cov txheej txheem corrosion rau cov khoom hlau?
Kub-dip galvanizing: cov txheej txheem paub tab, muaj zog adhesion, tus nqi nruab nrab, resistant rau atmospheric thiab rainwater corrosion, haum rau caij nplooj ntoos hlav clips, bolts, siab daim hlau, khiav spikes, thiab lwm yam., nrog rau sab nraum zoov lifespan ntawm 8-15 xyoo. Dacromet/zinc- txhuas txheej: Tsis muaj hydrogen embrittlement, resistant rau ntsev tsuag thiab tshuaj corrosion, haum rau siab - lub zog fasteners, nrog ib tug lifespan ntawm 10-20 xyoo, feem ntau yog siv nyob rau hauv lub tseem ceeb Cheebtsam ntawm high{12}} tsheb ciav hlau ceev thiab metro. Hmoov txheej / fluorocarbon txheej: Cov tsos zoo thiab muaj zog tiv thaiv huab cua, haum rau cov khoom sib xyaw ua ke zoo nkauj thiab kev tiv thaiv corrosion, tab sis tsis zoo cuam tshuam thiab hnav tsis kam, feem ntau yog siv rau cov khoom raug. Stainless hlau / huab cua hlau: Kev tiv thaiv corrosion ncaj qha los ntawm cov khoom siv nws tus kheej, nrog lub neej ua haujlwm ntev tshaj plaws, ncav cuag 20-30 xyoo lossis ntau dua, tab sis tus nqi siab, feem ntau siv nyob rau hauv ib puag ncig corrosive heev los yog cov khoom siv tu ncua ntev. Hauv kev tsim vaj tsev tiag tiag, kev tiv thaiv corrosion feem ntau yog siv, xws li galvanizing + sealing txheej, kom txuas ntxiv kev pab cuam lub neej.
Yuav ua li cas sib npaug corrosion tiv thaiv kev ua tau zoo thiab txhua yam khoom hauv kev tiv thaiv corrosion tsim?
Siab - cov khoom muaj zog xws li lub caij nplooj ntoos hlav clips, fishplates, thiab bolts yuav tsum tsis txhob muaj hydrogen embrittlement, metallographic hloov, thiab kev nyuaj siab concentration thaum tiv thaiv corrosion. Piv txwv li: ntau ntau pickling ntawm lub caij nplooj ntoos hlav steel xws li lub caij nplooj ntoos hlav clips yog nruj me ntsis txwv tsis pub; hydrogen embrittlement -cov txheej txheem tiv thaiv corrosion dawb yuav tsum nyiam; kub-dip galvanizing kub yuav tsum tau tswj kom tsis txhob txo cov khoom hardness thiab toughness; lub thickness ntawm txheej yuav tsum tsis sib xws kom tsis txhob cuam tshuam qhov sib dhos qhov ntev thiab kev sib cuag kev ntxhov siab; Cov coatings tuab heev ntawm qhov kev ntxhov siab thiab qhov sib txhuam ntawm qhov chaw yuav tsum tau zam kom tsis txhob slippage thiab loosening. Cov tshuaj tiv thaiv -corrosion txheej yuav tsum cais tawm cov xov xwm corrosive yam tsis muaj kev cuam tshuam lub zog, rigidity, thiab qaug zog kev ua haujlwm ntawm cov khoom lawv tus kheej, ua tiav qhov sib npaug ntawm kev tiv thaiv corrosion thiab cov khoom siv kho tshuab.
Qhov twg yog qhov kev tiv thaiv corrosion ua lub luag haujlwm tseem ceeb hauv kev tsim cov khoom siv taug qab?
Kev tsim qauv zoo tuaj yeem txo qhov kev pheej hmoo ntawm corrosion: tsis txhob grooves thiab cov ces kaum tuag qhov twg dej, plua plav, thiab xuab zeb tuaj yeem tsim; txo qhov chaw sib chwv ua rau crevice corrosion; siv cov duab streamlined kom yooj yim cov kua dej thiab cov dej phwj pov tseg; thickening los yog rounding cov ntsiab lus tsis muaj zog xws li bolt qhov, kawg, thiab fab; thiab zam kev txiav thiab qhov khoob hauv qhov tseem ceeb ntawm kev thauj khoom -cov kabmob kom tiv thaiv kev sib sau ntawm corrosion thiab qaug zog. Cov qauv kev tiv thaiv corrosion yog qhov kev lag luam zoo tshaj plaws thiab ntev ntev - txoj kev kav ntev, txo qis txij nkawm tom qab. Tshwj xeeb tshaj yog nyob rau hauv tunnels, qis- thaj chaw pw nrog dej tsub zuj zuj, thiab cov cheeb tsam uas muaj ntsev ntsev heev, kev tiv thaiv corrosion yog feem ntau zoo dua rau cov txheej txheem corrosion yooj yim.
Lub neej tag nrho -kev tiv thaiv kev tiv thaiv kev tiv thaiv kev ua haujlwm thiab kev saib xyuas muaj dab tsi?
Qhov no suav nrog: thawj zaug los tiv thaiv- kev xaiv cov txheej txheem corrosion thiab kev sim → Hoobkas los tiv thaiv- kev tshuaj xyuas zoo corrosion → kev tiv thaiv thaum lub sij hawm tsim kho (tsis muaj khawb, tsis muaj kab mob, tsis muaj kev cuam tshuam) → kev tshuaj xyuas tsis tu ncua thaum lub sij hawm ua haujlwm (txheej txheej puas, xeb, tev, pitting) → kho raws sij hawm ntawm kev puas tsuaj hauv zos → batch hloov {{2} ib puag ncig corrosion thaum ncav cuag lub neej. (cov cheeb tsam ntug dej hiav txwv, siab - thaj chaw siab txias, thaj chaw muaj kev lag luam, subways) los coj cov kev tiv thaiv kev tiv thaiv kev txhim kho ntawm cov khoom txuas ntxiv tom ntej. Los ntawm tag nrho - kev tswj cov txheej txheem, qhov tseeb los tiv thaiv- corrosion lifespan ntawm cov khoom mus txog qhov tsim lifespan, tsis txhob xav tias tsis ua hauj lwm vim corrosion ntxov ntxov thiab txo tag nrho lub neej voj voog nqi.