Corrosion Mechanism thiab Ntev -Lub Sijhawm Tiv Thaiv -Corrosion System ntawm Rail Cheebtsam
Dab tsi yog yam tseem ceeb ntawm corrosive ib puag ncig rau rail Cheebtsam?
Atmospheric corrosion: huab cua kub, kua qaub nag, muaj kuab paug; ntsev tsuag corrosion: thaj chaw ntug dej hiav txwv, thaj chaw ntsev dej; De-icing agent corrosion: de-icing ntsev nyob rau sab qaum teb lub caij ntuj no; Av / dej hauv av corrosion: qis- thaj chaw pw, cov qauv hauv av; Stray tam sim no corrosion: subway thiab lub teeb rail seem.
Kev puas tsuaj loj npaum li cas rau cov khoom?
Nto xeb daim ntawv khoob → kev nyuaj siab → qaug zog tawg; Xov xeb → jamming, tsis muaj peev xwm disassemble, tsis raug torque, loosening; Hla -sectional corrosion thinning → txo lub zog → tsis ua hauj lwm tam sim ntawd; Kev puas tsuaj los tiv thaiv - txheej txheej corrosion → localized ceev corrosion.
Kev sib piv ntawm mainstream ntev -lub sij hawm los tiv thaiv- txheej txheem corrosion:
Kub-dip galvanizing: tus nqi qis, kev pab cuam lub neej ntev, haum rau cov pa tsheb ciav hlau ceev thiab qhib- daim ntawv thov huab cua; Dacromet/zinc- txhuas txheej: muaj zog ntsev tshuaj tiv thaiv, tsis muaj hydrogen embrittlement, haum rau siab - tsheb ciav hlau ceev, subways, thiab siab - lub zog bolts; Stainless hlau / weathering steel: ntev kev pab cuam lub neej, haum rau huab corrosive ib puag ncig; Composite txheej: galvanizing + sealing xim, combining corrosion kuj thiab hnav tsis kam.
Cov ntsiab cai tseem ceeb ntawm kev tiv thaiv corrosion tsim:
Zam kom tsis txhob muaj dej thiab plua plav thiab qhov khoob hauv cov qauv; zam cov txheej txheej ntau dhau ntawm kev thauj khoom-cov kabmob nto tiv thaiv kev swb thiab qhov tsis raug; tiv thaiv hydrogen embrittlement nyob rau hauv siab - zog Cheebtsam; xyuas kom muaj kev tiv thaiv corrosion tsis ua rau cov khoom siv dag zog lossis qaug zog.
Cov ntsiab lus tseem ceeb rau kev tiv thaiv corrosion thaum lub sijhawm ua haujlwm thiab kev saib xyuas:
Kho cov coatings puas sai sai; kho xeb thaum ntxov kom tsis txhob kis tau; txhim kho corrosion tiv thaiv qib nyob rau hauv batch rau hnyav corroded seem; tsim cov ntaub ntawv ib puag ncig rau kev xaiv sib txawv.