Corrosion yog ib qho tseem ceeb uas ua rau lub valve puas.Hauv kev tiv thaiv valve, kev tiv thaiv valve yog ib qho teeb meem tseem ceeb uas yuav tsum tau xav txog.Rau cov hlau li qub, txheej txheej txheej txheej yog qhov zoo tshaj plaws tiv thaiv tus nqi.
1. Kev tiv thaiv
Tom qab cov hlau nto yog coated nrog cov xim, cov hlau nto kuj raug cais tawm ntawm ib puag ncig.Qhov kev tiv thaiv no tuaj yeem hu ua shielding effect.Tab sis nws yuav tsum tau taw qhia tias ib txheej nyias ntawm cov xim tsis tuaj yeem ua lub luag haujlwm tiv thaiv.Vim hais tias lub siab polymer muaj qee qhov huab cua permeability, thaum lub txheej yog nyias nyias, nws cov qauv pores tso cai rau cov molecules ntawm dej thiab oxygen mus dawb.Mos-sealed li qub muaj cov kev cai nruj ntawm cov tuab ntawm epoxy txheej ntawm qhov chaw.Nws tuaj yeem pom tau tias rau ntau txheej txheej tus nqi yog ntau dua li cov hlau tsis muaj coated.Txhawm rau txhim kho lub impermeability ntawm cov txheej txheej, cov txheej tiv thaiv corrosion yuav tsum siv cov yeeb yaj kiab tsim cov khoom siv nrog cov cua permeability tsawg thiab cov khoom muab tub lim nrog cov khoom thaiv loj, thiab tib lub sijhawm, cov txheej txheej txheej yuav tsum tau nce ntxiv. kom cov txheej tuaj yeem ncav cuag ib qho tuab thiab tuab thiab tsis ntxeem tau.
2. Corrosion inhibition
Los ntawm reacting lub sab hauv Cheebtsam ntawm txheej nrog cov hlau, cov hlau nto yog passivated los yog ib tug tiv thaiv khoom yog generated los txhim kho cov kev tiv thaiv nyhuv ntawm txheej.Valves siv rau cov kev cai tshwj xeeb yuav tsum tau them sai sai rau qhov muaj pes tsawg leeg ntawm cov xim kom tsis txhob muaj kev phom sij loj.Tsis tas li ntawd, cov cam khwb cia steel valve siv nyob rau hauv cov roj pipeline, cov khoom degradation generated nyob rau hauv qhov kev txiav txim ntawm qee cov roj thiab kev ua kom qhuav ntawm cov hlau soaps kuj tuaj yeem ua lub luag haujlwm ntawm cov organic corrosion inhibitors.
3. Kev tiv thaiv hluav taws xob
Electrochemical corrosion nyob rau hauv zaj duab xis tshwm sim thaum lub dielectric permeable txheej los rau hauv kev sib cuag nrog cov hlau nto.Siv cov hlau uas muaj kev ua haujlwm siab dua li cov hlau ua cov khoom ntim hauv cov txheej, xws li zinc.Nws yuav ua si lub luag hauj lwm tiv thaiv ntawm sacrificial anode, thiab cov khoom siv corrosion ntawm zinc yog cov zinc chloride thiab zinc carbonate, uas yuav ua rau cov kab sib txawv ntawm daim nyias nyias thiab ua rau daim nyias nyias nyias, uas zoo heev txo cov corrosion thiab ua rau lub neej kev pab cuam ntev. valve.
Post lub sij hawm: Sep-19-2022