Mechanism ntawm Accelerated Corrosion thiab Electrochemical Corrosion nyob rau hauv Fastener Systems los ntawm Dej Accumulation
Q1: Vim li cas cov dej ntim tau nce nrawm nrawm nrawm?
A1: Accumulated water forms a water film, muab ib puag ncig electrolyte rau electrochemical corrosion, nrog oxygen thiab noo noo tsis tu ncua koom rau hauv cov tshuaj tiv thaiv, thiab tus nqi corrosion yog ob peb zaug sai dua li nyob rau hauv ib puag ncig qhuav. Sediment thiab impurities hauv dej ntxiv rau micro- roj teeb, thiab cov txheej txheem corrosion txuas ntxiv mus.
Q2: Vim li cas electrochemical corrosion yog pom tseeb nyob rau hauv electrified railway seem?
A2: Stray tam sim no tsim los ntawm traction tam sim no to ua rau muaj peev xwm sib txawv ntawm fasteners, rails thiab sleepers, ua rau muaj zog electrochemical corrosion. Cov khoom siv hlau xws li bolts thiab lub tes tsho ua anodes, sai sai dissolving thiab corroding, heev shortening lub voj voog tsis ua hauj lwm.
Q3: Vim li cas corrosion yog qhov hnyav tshaj plaws nyob rau hauv nkhaus thiab qis -dej seem?
A3: Cov dej ntws hauv cov ntu no tsis zoo, nrog rau lub sijhawm ntev - cov dej khaws cia thiab cov av noo txaus. Nyob rau tib lub sijhawm, curvatures dais lub zog loj thiab hnyav hnyav, cov txheej tiv thaiv saum npoo tau yooj yim puas, corrosion yog feem ntau cuam tshuam rau lub substrate, tsim dual kev puas tsuaj ntawm "hnav + corrosion".
Q4: Ntau npaum li cas corrosion cuam tshuam lub tensile thiab shear zog ntawm bolts?
A4: Corrosion txo qhov zoo ntawm bolts, ua kom muaj zog corrosion pit concentration ntawm qhov chaw, thiab txo lub zog. Kev xeb hnyav tuaj yeem txo lub zog tensile los ntawm ntau dua 30%, ua rau cov pob txha tawg sai heev uas yuav muaj nyob rau hauv kev vibration load.
Q5: Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau nws
A5: Txhim kho cov dej ntws thiab tshem tawm cov dej thiab cov av hauv lub sijhawm. Txais cov khoom siv tiv thaiv-corrosion xws li galvanized thiab Dacromet. Ua kom muaj zog rwb thaiv tsev nyob rau hauv cov khoom hluav taws xob kom txo tau qhov tsis zoo tam sim no. Tsis tu ncua derust thiab kho cov tshuaj tiv thaiv-corrosion coatings kom tswj cov khoom tsis zoo.