Kev sib piv cov qauv rau cov tshuab ua haujlwm qib ntawm Rail Spikes nrog txawv Loads
Dab tsi yog qhov txawv ntawm corrosion kuj ntawm electro-galvanized thiab kub-dip galvanized spikes nyob rau hauv anchorage systems?
Electro-galvanized spikes muaj ib txheej zinc nyias (feem ntau 5-15μm) nrog tsis muaj zog adhesion rau substrate. Nyob rau hauv ib puag ncig corrosive, zinc txheej yog yooj yim rau tev, nrog lub neej corrosion tsuas yog 2-3 xyoos. Kub-dip galvanized spikes muaj zinc txheej thickness ntawm 85-120μm-ntau tshaj li rau lub sij hawm ntawm electro-galvanized spikes-nrog metallurgical bonding rau lub substrate thiab tsis tshua muaj zog adhesion, muab ib tug corrosion kuj lub neej ntawm ntau tshaj 10 xyoo. Nyob rau hauv ib puag ncig hnyav xws li av noo thiab saline-alkali av, electro-galvanized spikes qhia pom tseeb xeb nyob rau hauv 1 xyoo, txo cov kev sib txuas ntawm cov neeg sawv cev ntawm cov neeg sawv cev thiab cov ntsia hlau loj; nyob rau hauv sib piv, kub-dip galvanized spikes tuav lub suab nto rau lub sij hawm ntev, ua kom lub stability ntawm lub anchorage system.
Vim li cas zinc flake (Dacromet) spikes haum rau siv nyob rau hauv resin anchorage systems ntawm qhob pw tsaug zog?
Dacromet coatings muaj cov kua qaub thiab alkali corrosion kuj zoo heev, tiv thaiv kev yaig los ntawm cov tshuaj acidic tso tawm thaum lub sij hawm resin anchoring agent curing, thiab tsis txhob hydrogen embrittlement los yog xeb nyob rau saum npoo. Dacromet coatings yog ib yam nkaus thiab pinhole -dawb, tag nrho npog cov ntsia hlau loj threads thiab lub taub hau los tiv thaiv infiltration ntawm corrosive media. Tsis tas li ntawd, Dacromet coatings muaj kev sib txhuam coefficient ruaj khov, ua kom muaj kev hloov pauv ntau dua ntawm torque thiab preload thaum lub sij hawm ntsia hlau loj, thiab tsis txhob cuam tshuam qhov sib txawv ntawm qhov sib txawv los ntawm kev sib txhuam coefficient fluctuations. Nws cov hydrogen embrittlement- tus yam ntxwv pub dawb kuj ua rau nws tsim nyog rau kev tiv thaiv kev tiv thaiv - kev kho corrosion ntawm siab - lub zog spikes, yog li ua qhov kev xaiv zoo tshaj plaws rau resin anchorage systems.
Yuav ua li cas irreversible cuam tshuam puas rau lub spike lub nto kho mob txheej muaj nyob rau hauv anchorage rub- tawm tsis kam?
Tom qab kev puas tsuaj rau txheej txheej txheej txheej, lub hauv paus hlau yog ncaj qha mus rau corrosive ib puag ncig thiab sai sai tsim liab xeb. Cov khoom siv xeb muaj qhov ntim 2-3 npaug ntawm cov hlau, ua kom muaj kev ntxhov siab nthuav dav ntawm tus ntsia hlau loj thiab tus neeg sawv cev thauj khoom, ua rau micro- tawg rau hauv tus neeg sawv cev anchoring. Cov micro- cov kab nrib pleb no dhau los ua txoj hauv kev rau dej thiab cov xov xwm corrosive, ntxiv rau qhov ua rau cov kab mob xeb ntxiv thiab cov neeg sawv cev rau kev laus, thiab ua rau muaj kev sib txuas ceev ceev. Qhov kev sib khi quab yuam attenuation los ntawm xeb yog irreversible; Txawm hais tias tus spike recoated tom qab, qhov qub anchorage rub-tawm tsis tuaj yeem rov qab los, thiab qhov spike yuav tsum tau hloov.
Dab tsi tshwj xeeb yuav tsum muaj rau kev xaiv cov txheej txheem kho saum npoo rau spikes hauv thaj tsam alpine?
Cov cheeb tsam Alpine muaj qhov kub thiab txias qhov sib txawv ntawm nruab hnub thiab hmo ntuj, yog li cov kab mob ntawm cov kab mob saum npoo yuav tsum muaj qhov tsis zoo heev - kub adhesion thiab khov -thaw tsis kam. Kub-dip galvanized spikes yog qhov yooj yim rau zinc txheej embrittlement ntawm qhov kub thiab txias, yog li qis- kub toughened kub-dip galvanizing lossis zinc diffusion txheej yuav tsum tau siv. Zinc diffusion coatings muaj zog substrate adhesion thiab zoo low-kub toughness, thiab yuav tsis tev tawm nyob rau hauv khov -thaw cycles. Tsis tas li ntawd, cov txheej txheem kho saum npoo ntawm spikes hauv thaj tsam alpine yuav tsum muaj UV aging tiv thaiv kom tsis txhob muaj txheej txheej chalking thiab tev tawm los ntawm UV hluav taws xob hnyav, ua kom muaj kev tiv thaiv kev tiv thaiv hauv qhov chaw huab cua.
Yuav ua li cas kom sai li sai tau qhov zoo thiab corrosion lub xeev ntawm tus spike tus nto kho txheej ntawm qhov chaw?
Ib txheej txheej tuab tuaj yeem siv los txheeb xyuas cov txheej txheem txheej txheej zoo: zinc txheej thickness Ntau dua lossis sib npaug ntawm 85μm rau kub -dip galvanized spikes thiab txheej txheej thickness Ntau dua lossis sib npaug li 5μm rau Dacromet spikes yog tsim nyog. Rau kev kuaj xyuas lub xeev corrosion, pom qhov pom ntawm qhov ntsia hlau loj- tsis muaj xeb liab, blistering, lossis tev tawm qhia qhov zoo; xim liab hauv zos qhia tias txheej puas tsuaj. Rau anched spikes, maj mam coj mus rhaub cov ntsia hlau loj nrog rauj me me: lub suab npub yuav qhia tau tias muaj xeb hauv, thaum lub suab nkig qhia tau hais tias zoo. Tsis tas li ntawd, rau cov kab mob rusted hnyav, sampling rub- tawm kev xeem tuaj yeem ua tau; yog tias rub- tawm qhov tsis kam qis dua 80% ntawm tus nqi tsim, yuav tsum tau hloov batch.