1. ** SSAWW cov yeeb nkab tiv taus corrosion? **
Swsaw (kauv subwerged arc welded) yeeb nkab nws tus kheej yog cov pa roj carbon hlau thiab inherfly raug rau corrosion. Nws corrosion tsis kam los ntawm sab nraud thiab sab hauv cov tsho tiv thaiv kev ua haujlwm thov thaum tsim khoom. Cov txheej txheem pleev xim suav nrog Fusion - kev tiv thaiv epoxy (PE) lossis polypropylene (pp) tapes lossis extruded txheej rau kev tiv thaiv tshuab. Sab Nraud, cov caj pas xws li cach cug lossis epoxy feem ntau siv. Tsis tas li ntawd, Cathodic tiv thaiv cov txheej txheem yog feem ntau ntsia nrog rau cov kav dej ssaw los muab cov tshuab hluav taws xob tsis kam.
2. ** Hom yeeb nkab yog cov feem ntau tiv taus corrosion? **
Thermoplastic kav, tshwj xeeb yog cov ua los ntawm ** high - qhov tseeb ntawm polyethylene (HDPE) **, feem ntau suav hais tias feem ntau tiv taus corrosion. Txij li thaum lawv tsis yog- nws yog xim hlau, lawv tiv thaiv cov tshuaj tua hluav taws xob (xeb) thiab ib puag ncig cov khoom siv uas tawm tsam cov kav hlau. Lwm cov kev xaiv corrosion - cov pa roj fiberglass {} Kuv tuaj yeem kim dua li HDPE.
3. ** Yuav ua li cas tiv thaiv steel yeeb los ntawm corrosion? **
Tiv thaiv cov kav hlau hlau los ntawm kev corrosion cuam tshuam nrog ntau lub tswv yim:
* ** TXHEEJ TXHEEM Tiv thaiv: ** Thov Cov Khaub Ncaws Hnav (zoo li FBE, XIM, PARYURETHANE, POLYURETHANE CORRAMIVE (av, dej, huab cua).
* ** Kev tiv thaiv Cathodic (CP): ** Siv cov ntawv foob (galvanic) CP feem ntau siv rau hauv kev sib txuas nrog cov txheej txheej.
* **Material Selection:** Using corrosion-resistant alloys (like stainless steel) or non-metallic materials (like HDPE or FRP) where feasible and cost-effective.
* ** Tsim cov kev txiav txim siab: ** Ua kom muaj kev txhuav tawm zoo, zam kev sib cuag nrog cov meterimilar me me, thiab cov kua dej tsis sib haum xeeb.
* ** Kev tswj ib puag ncig: ** Kho cov dej (tshem cov pa oxygen, ntxiv rau cov pa roj ntsha), insulating kav dej los ntawm av noo noo, lossis tswj cov cua.
* ** Corrosion Inhibitors: ** Ntxiv cov tshuaj rau cov kua hauv cov yeeb nkab uas ua cov yeeb yaj kiab tiv thaiv lossis hloov ib puag ncig kom txo qis corrosivity.
* ** Kev tshuaj xyuas ib txwm muaj: ** Saib xyuas txheej muaj mob, CP system ua haujlwm, thiab yeeb nkab phab ntsa tuab los txheeb xyuas thiab chaw nyob ntawm corrosion thaum ntxov.
4. ** Dab tsi yog qhov tseem ceeb ua yeeb nkab corrosion? **
Tus ** Ua Rau Cov Yeeb Nkab Ntawm Cov Yeeb Nkab ** Tshwj Xeeb Rau Cov Voj Hlau Zoo Li Hlau Zoo li Hlau, yog ** Electrochemical cov tshuaj tiv thaiv ** Nrog lawv ib puag ncig. Qhov no cuam tshuam nrog oxidation ntawm cov hlau (piv txwv li, hlau tig mus rau hauv cov yeeb nkab oxide / fircetated los ntawm cov khoom siv dav hlau, xws li dej, av noo noo, lossis condensed dej vapor). Yam xws li yaj oxygen, noo noo, ntsev (sulorides, acids kub, thiab sib cuag nrog cov txheej txheem sib luag ntawm cov txheej txheem hluav taws xob no ua kom nrawm dua qhov txheej txheem hluav taws xob no.
5. ** Dab tsi tshem tawm corrosion los ntawm cov kav dej? **
Tshem tawm cov xeb uas twb muaj lawm (xeb, nplai, thiab lwm yam) los ntawm cov kav dej feem ntau cuam tshuam nrog cov neeg kho mob lossis tshuaj lom neeg:
* ** Cov hau kev siv tshuab: "Cov kev sib cav sib cav sib ceg (tawg paj, sib tsoo, sib tsoo, feem ntau tsim nyog ua ntej thov kev tiv thaiv kev tiv thaiv. Kev tu hniav sab hauv tuaj yeem siv cov npua (scrapers) nrog cov hlau txhuam lossis cov khoom tawg.
* ** Siv cov txheej txheem siv tshuaj: ** Siv cov kua roj plab (zoo li cov tshuaj ntxuav kua qaub lossis cov tshuaj ntxuav kom yaj lossis tso quav lossis cov tshuaj ntxuav kom huv lossis rub tawm). Qhov no yuav tsum tau ua tib zoo saib xyuas, nruab nrab, thiab yaug los tiv thaiv kev puas tsuaj rau cov yeeb nkab lossis ib puag ncig.
* **High-Pressure Water Jetting:** Using very high-pressure water streams to blast away loose corrosion and debris, especially inside pipes.
* ** CEEB TOOM TSEEM CEEB: ** Tsuas yog tshem cov corrosion uas pom tias tsis kho tau cov ntawv poob lossis nres tom ntej corrosion. Cov tshuaj ntxuav sab nraud feem ntau yuav tsum tau thov kev tiv thaiv tam sim ntawd lossis cov txheej txheem tiv thaiv kom tiv thaiv kom tsis txhob muaj kev tiv thaiv sai. Qhov pib ua rau (tsis muaj txheej, ua tsis tiav CP, thiab lwm yam) yuav tsum tau hais.
