Lub hom phiaj ntawm cov ntaub ntawv txheej
Txheej sab nraud ntawm cov kav hlau steel yog qhov tseem ceeb los tiv thaiv xeb.Kev xeb ntawm cov yeeb nkab steel tuaj yeem cuam tshuam rau lawv txoj haujlwm, qhov zoo, thiab qhov muag pom.Yog li ntawd, txheej txheej txheej txheem muaj feem cuam tshuam rau tag nrho cov khoom zoo ntawm cov yeeb nkab steel.
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Kev xav tau rau cov ntaub ntawv txheej
Raws li cov qauv tsim los ntawm American Petroleum Institute, cov kav hlau yuav tsum tiv thaiv corrosion tsawg kawg peb lub hlis.Txawm li cas los xij, qhov kev thov rau lub sijhawm ntev los tiv thaiv xeb tau nce ntxiv, nrog rau ntau tus neeg siv xav tau kev tiv thaiv rau 3 mus rau 6 lub hlis hauv kev cia sab nraum zoov.Sib nrug los ntawm qhov yuav tsum tau ua kom ntev, cov neeg siv xav tau cov txheej txheem kom muaj lub ntsej muag du, txawm tias kev faib tawm ntawm cov tshuaj tiv thaiv kab mob tsis muaj kev hla lossis cov dej uas yuav cuam tshuam rau qhov pom kev zoo.
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Hom ntawm cov ntaub ntawv txheej thiab lawv cov Pros thiab Cons
Hauv nroog underground yeeb nkab network,cov kav hlauyog siv los thauj cov pa roj, roj, dej, thiab lwm yam.Cov txheej txheem rau cov kav dej no tau hloov zuj zus los ntawm cov khoom siv asphalt ib txwm siv rau polyethylene resin thiab epoxy resin cov ntaub ntawv.Kev siv cov polyethylene resin coatings pib nyob rau hauv 1980s, thiab nrog ntau yam kev siv, cov khoom thiab txheej txheej txheem tau pom kev txhim kho maj mam.
3.1 Petroleum Asphalt Txheej
Petroleum asphalt txheej, ib txwm siv los tiv thaiv corrosive txheej, muaj cov roj av asphalt txheej, ntxiv nrog fiberglass daim ntaub thiab ib qho kev tiv thaiv sab nraud polyvinyl chloride zaj duab xis.Nws muaj kev tiv thaiv zoo heev, zoo adhesion rau ntau qhov chaw, thiab kev siv nyiaj zoo.Txawm li cas los xij, nws muaj qhov tsis zoo nrog rau kev hloov pauv ntawm qhov kub thiab txias, ua nkig hauv qhov kub thiab txias, thiab ua rau muaj kev laus thiab tawg, tshwj xeeb tshaj yog nyob rau hauv cov av pob zeb, xav tau kev tiv thaiv ntxiv thiab cov nqi nce ntxiv.
3.2 Coal Tar Epoxy Txheej
Coal tar epoxy, ua los ntawm epoxy resin thiab thee tar asphalt, nthuav tawm cov dej zoo thiab tshuaj lom neeg, tiv thaiv corrosion, zoo adhesion, mechanical zog, thiab rwb thaiv tsev.Txawm li cas los xij, nws yuav tsum tau kho lub sijhawm ntev dua tom qab thov, ua rau nws muaj kev cuam tshuam los ntawm cov huab cua puag thaum lub sijhawm no.Ntxiv mus, ntau yam khoom siv hauv cov txheej txheem no xav tau tshwj xeeb cia, nce nqi.
3.3 Epoxy hmoov txheej
Epoxy hmoov txheej, qhia nyob rau hauv 1960s, koom nrog electrostatically txau hmoov mus rau pre-kho thiab pre-rhuab yeeb nkab nto, tsim ib tug ntom anti-corrosive txheej.Nws qhov zoo muaj xws li qhov kub thiab txias (-60 ° C txog 100 ° C), muaj zog adhesion, zoo tiv thaiv cathodic disbondment, cuam tshuam, yooj, thiab weld puas.Txawm li cas los xij, nws cov yeeb yaj kiab thinner ua rau nws yooj yim rau kev puas tsuaj thiab yuav tsum muaj cov txheej txheem tsim khoom thiab cov cuab yeej siv, ua rau muaj teeb meem hauv daim ntawv thov.Thaum nws ua tau zoo nyob rau hauv ntau yam, nws ntog luv luv piv rau polyethylene nyob rau hauv cov nqe lus ntawm tshav kub tsis kam thiab tag nrho corrosion tiv thaiv.
3.4 Polyethylene Anti-corrosive Txheej
Polyethylene muaj kev cuam tshuam zoo heev thiab muaj zog hardness nrog rau qhov kub thiab txias.Nws pom kev siv dav hauv thaj chaw txias xws li Russia thiab Western Europe rau cov kav dej vim nws qhov yooj yim dua thiab cuam tshuam tsis kam, tshwj xeeb tshaj yog nyob rau qhov kub thiab txias.Txawm li cas los xij, cov kev sib tw tseem nyob hauv nws daim ntawv thov ntawm cov kav dej loj, qhov chaw muaj kev ntxhov siab tuaj yeem tshwm sim, thiab cov dej nkag tuaj yeem ua rau corrosion hauv qab txheej, xav tau kev tshawb fawb ntxiv thiab kev txhim kho cov khoom siv thiab cov txheej txheem.
3.5 Heavy Anti-corrosion Txheej
Heavy anti-corrosion txheej muab kev txhim kho corrosion zoo piv rau cov txheej txheem txheej txheem.Lawv nthuav tawm cov txiaj ntsig ntev txawm tias nyob rau hauv cov xwm txheej hnyav, nrog lub neej ntev tshaj li 10 mus rau 15 xyoo hauv tshuaj lom neeg, dej hiav txwv, thiab hnyav ib puag ncig, thiab tshaj 5 xyoos hauv acidic, alkaline, lossis saline.Cov txheej txheem no feem ntau muaj cov zaj duab xis qhuav ntawm 200μm txog 2000μm, ua kom muaj kev tiv thaiv zoo dua thiab ua haujlwm ntev.Lawv tau siv dav hauv cov qauv hauv hiav txwv, cov khoom siv tshuaj, cov tso tsheb hlau luam, thiab cov kav dej.
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Cov teeb meem tshwm sim nrog cov ntaub ntawv txheej
Feem ntau cov teeb meem nrog cov coatings muaj xws li daim ntawv thov tsis sib xws, poob ntawm cov tshuaj tiv thaiv corrosive, thiab tsim cov npuas.
(1) Cov txheej tsis sib xws: Kev faib tawm tsis sib xws ntawm cov tshuaj tiv thaiv corrosive ntawm cov yeeb nkab nto ua rau thaj chaw uas muaj txheej txheej ntau dhau, ua rau nkim, thaum nyias los yog tsis muaj txheej txheej txo cov yeeb nkab muaj peev xwm tiv thaiv corrosion.
(2) Dripping ntawm cov tshuaj tiv thaiv corrosive: Qhov tshwm sim no, qhov twg cov tshuaj tiv thaiv corrosive solidify zoo li cov tee dej ntawm cov yeeb nkab nto, cuam tshuam rau kev zoo nkauj thaum tsis ncaj qha cuam tshuam rau corrosion.
(3) Kev tsim cov npuas: Cov cua daig hauv cov tshuaj tiv thaiv corrosive thaum lub sij hawm daim ntawv thov tsim npuas ntawm cov yeeb nkab nto, cuam tshuam rau ob qho tib si tsos thiab txheej txheej zoo.
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Kev txheeb xyuas cov teeb meem zoo ntawm txheej txheej
Txhua qhov teeb meem tshwm sim los ntawm ntau yam laj thawj, yog tshwm sim los ntawm ntau yam;thiab ib pob ntawm cov yeeb nkab steel tseem ceeb los ntawm qhov zoo ntawm qhov teeb meem kuj tuaj yeem ua ke ntawm ob peb.Qhov ua rau cov txheej tsis sib xws tuaj yeem raug faib ua ob hom, ib qho yog qhov tsis sib xws tshwm sim los ntawm kev txau tom qab cov yeeb nkab steel nkag mus rau hauv lub thawv txheej;qhov thib ob yog qhov tshwm sim tsis sib xws uas tshwm sim los ntawm kev tsis txau.
Qhov laj thawj rau thawj qhov tshwm sim yog pom tseeb yooj yim pom, rau cov khoom siv txheej thaum cov yeeb nkab steel rau hauv lub thawv txheej hauv 360 ° nyob ib ncig ntawm tag nrho 6 phom (kab kab muaj 12 phom) rau kev txau.Yog tias txhua rab phom txau tawm ntawm qhov ntws loj sib txawv, ces nws yuav ua rau tsis sib xws ntawm cov tshuaj tiv thaiv kab mob hauv ntau qhov chaw ntawm cov yeeb nkab steel.
Qhov thib ob yog vim li cas muaj lwm yam laj thawj rau qhov tsis sib xws txheej tshwm sim dua li cov tshuaj tsuag.Muaj ntau ntau yam, xws li cov yeeb nkab steel tuaj xeb, roughness, yog li ntawd cov txheej yog nyuaj rau tusyees faib;steel yeeb nkab nto muaj qhov ntsuas dej siab tso tseg thaum lub emulsion, lub sij hawm no rau txheej vim kev sib cuag nrog cov emulsion, kom cov preservative yog ib qho nyuaj rau txuas mus rau saum npoo ntawm cov yeeb nkab steel, thiaj li hais tias tsis muaj txheej txheej ntawm lub emulsion. steel yeeb nkab qhov chaw ntawm emulsion, uas ua rau cov txheej txheem ntawm tag nrho cov yeeb nkab steel tsis zoo ib yam.
(1) Yog vim li cas ntawm anticorrosive tus neeg sawv cev dai tee.Qhov hla ntawm cov yeeb nkab steel yog puag ncig, txhua zaus cov tshuaj tiv thaiv kab mob tau txau rau ntawm qhov chaw ntawm cov yeeb nkab steel, cov tshuaj tiv thaiv kab mob nyob rau sab saud thiab ntug yuav ntws mus rau qhov qis vim qhov cuam tshuam ntawm lub ntiajteb txawj nqus, uas. yuav tsim phenomenon ntawm dai poob.Qhov zoo tshaj plaws yog tias muaj cov khoom siv qhov cub hauv txheej txheej txheej ntawm cov yeeb nkab steel Hoobkas, uas tuaj yeem ua kom sov thiab ua kom muaj zog ntawm cov tshuaj tiv thaiv kab mob txau rau ntawm qhov chaw ntawm cov yeeb nkab steel hauv lub sijhawm thiab txo qhov fluidity ntawm tus neeg sawv cev anticorrosive.Txawm li cas los xij, yog tias qhov viscosity ntawm tus neeg sawv cev anticorrosive tsis siab;tsis muaj cua sov raws sijhawm tom qab txau;los yog cua sov kub tsis siab;lub nozzle tsis nyob rau hauv kev ua hauj lwm zoo, thiab lwm yam yuav ua rau cov anticorrosive tus neeg sawv cev dai tee.
(2) Ua rau muaj kev tiv thaiv corrosion.Vim qhov chaw ua haujlwm ib puag ncig ntawm huab cua noo, xim dispersion ntau dhau, dispersion txheej txheem kub poob yuav ua rau preservative bubbling tshwm sim.Cov huab cua nyob ib puag ncig, qhov ntsuas kub qis dua, cov tshuaj tua kab mob tawm ntawm qhov tawg mus rau hauv cov me me, yuav ua rau qhov kub thiab txias.Cov dej hauv cov huab cua nrog cov av noo ntau dua tom qab qhov kub thiab txias yuav condense los tsim cov dej zoo sib xyaw nrog cov khoom khaws cia, thiab nws thiaj li nkag mus rau hauv cov txheej txheem, uas ua rau cov txheej txheem blistering tshwm sim.
Post lub sij hawm: Dec-15-2023