Anticorrosive nto kho cov yeeb nkab steel
Kev kho saum npoo ntawm cov yeeb nkab steel yog ib qho tseem ceeb los txiav txim siab qhov kev pabcuam tiv thaiv corrosion ntawm cov kav dej, thiab nws yog lub hauv paus ntawm seb cov txheej txheem tiv thaiv corrosion tuaj yeem ua ke nrog cov yeeb nkab steel. Raws li kev txheeb xyuas ntawm cov chaw tshawb fawb, lub neej ntawm anticorrosive txheej yog nyob ntawm hom txheej txheej, txheej txheej zoo thiab kev tsim kho ib puag ncig thiab lwm yam. Kev cuam tshuam ntawm kev kho saum npoo ntawm cov yeeb nkab steel ntawm lub neej ntawm cov txheej txheem anticorrosive yog li 50 feem pua. Yog li ntawd, txoj kev kho saum npoo ntawm cov yeeb nkab steel yuav tsum tau tshawb xyuas thiab sau cov ntsiab lus tsis tu ncua raws li qhov yuav tsum tau ua ntawm cov txheej txheem anticorrosive ntawm cov yeeb nkab steel.
1 Kev ntxuav
Cov kuab tshuaj thiab emulsion yog siv los ntxuav cov hlau saum npoo kom tshem tawm cov roj, roj, plua plav, roj nplua nyeem thiab cov organic zoo sib xws, tab sis nws tsis tuaj yeem tshem tawm xeb, oxide tawv nqaij, vuam flux thiab lwm yam ntawm cov hlau nto, yog li nws tsuas yog siv los ua cov kuab tshuaj. ib tug pab txhais tau tias nyob rau hauv anti-corrosion ntau lawm.
2 Tshem tawm xeb siv cov cuab yeej
Feem ntau siv hlau txhuam thiab lwm yam cuab yeej los txhuam cov hlau nto, tuaj yeem tshem tawm xoob lossis warped oxide daim tawv nqaij, xeb, vuam slag thiab lwm yam. Cov cuab yeej tes tuaj yeem ncav cuag qib Sa2, cov cuab yeej hluav taws xob tuaj yeem ncav cuag qib Sa3, yog tias cov hlau nto ruaj khov rau hauv daim ntawv oxide, cov cuab yeej xeb tshem tawm tsis zoo, tsis tuaj yeem ncav cuag cov kev xav tau ntawm kev tsim kho ntawm cov pob zeb hauv qhov tob.
3 Pickling
Feem ntau, chemical thiab electrolytic txoj kev yog siv los ua kev kho mob pickling. Pipeline anticorrosion tsuas yog siv cov tshuaj pickling, uas tuaj yeem tshem tawm cov tawv nqaij oxide, xeb thiab txheej txheej qub. Qee zaum, nws tuaj yeem siv ua rov ua dua tom qab sandblasting. Txawm hais tias kev siv tshuaj tua kab mob tuaj yeem ua rau lub ntsej muag ncav cuag qee qhov kev huv thiab roughness, nws txoj kab thauj tog rau nkoj yog qhov ntiav thiab yooj yim rau paug ib puag ncig.
4. Txau (pov) kom tshem tawm xeb
Txau (thaws) ejection derusting yog tsav los ntawm lub zog loj lub cev muaj zog los tshuaj tsuag (thib) ejection hniav ntawm kev kub ceev, thiaj li hais tias abrades xws li steel xuab zeb, steel pellets, hlau hlau ntu thiab minerals yog sprayed (them) ejection kho ntawm lub nto ntawm cov yeeb nkab steel nyob rau hauv qhov kev txiav txim ntawm lub zog centrifugal, uas tuaj yeem tsis tsuas yog tshem tawm xeb, oxide thiab av, tab sis kuj yog cov yeeb nkab steel nyob rau hauv qhov kev txiav txim ntawm abrasive hnyav cuam tshuam thiab kev sib txhuam quab yuam. Nws tseem tuaj yeem ua tiav qhov xav tau zoo ib yam roughness. Tom qab txau, tsis tsuas yog tuaj yeem nthuav dav lub cev adsorption ntawm cov yeeb nkab saum npoo, tab sis kuj tuaj yeem txhim kho cov neeg kho tshuab adhesion ntawm txheej anticorrosive thiab cov yeeb nkab nto. Yog li ntawd, tshuaj tsuag yog ib txoj hauv kev zoo tshaj plaws los tshem tawm xeb hauv cov kav dej. Feem ntau hais lus, txhaj tshuaj peening (xuab zeb) tshem tawm xeb feem ntau yog siv rau kev kho cov yeeb nkab hauv qhov chaw kho mob, txhaj tshuaj peening (xuab zeb) xeb tshem tawm tsuas yog siv rau cov yeeb nkab sab nrauv kho. Ntau qhov teeb meem yuav tsum tau them sai sai rau thaum siv tshuaj tsuag kom tshem tawm xeb.
4.1 Derusting qib
Rau cov txheej txheem kev tsim kho ntawm epoxy, ethylene, phenolic thiab lwm yam tshuaj tiv thaiv corrosion feem ntau siv hauv cov kav dej steel, feem ntau ntawm cov kav dej hlau yuav tsum tau mus txog ze li ntawm tus kheej qib (Sa2.5). Kev xyaum tau ua pov thawj tias yuav luag tag nrho cov tawv nqaij oxide, xeb thiab lwm yam av tuaj yeem raug tshem tawm los ntawm qib kev tshem tawm xeb, thiab lub thauj tog rau nkoj lis qhov tob tuaj yeem ncav cuag 40 ~ 100 μm, uas ua tau raws li qhov xav tau ntawm adhesion ntawm txheej anticorrosive thiab cov yeeb nkab steel. Cov txheej txheem tshuaj tsuag (jetting) ejection tuaj yeem ua tiav nyob ze ntawm qib dawb (Sa2.5) cov txheej txheem kev ua haujlwm nrog tus nqi qis thiab ruaj khov thiab txhim khu kev qha.
