Q1: Dab tsi yog cov feem ntau siv tshuaj tiv thaiv corrosion rau Q235 steel yeeb nkab?
Kub-DIP galvanizing (zinc txheej ntau dua lossis sib npaug rau 80μm, GB / T13912) haum rau sab nraum zoov qauv thiab muaj peev xwm kav ntev txog 20 xyoo. Epoxy pob zeb av (peb cov roj thiab ob daim ntaub) yog siv rau cov kav dej tawg, uas yog acid thiab alkali tiv taus thiab tus nqi qis. Yas Txau (Epoxy Hmoov) Thickness yog 60 ~ 120μm, haum rau ib puag ncig sab hauv tsev. Txias galvanizing (electroplating) cov txheej txheem yog yooj yim tab sis muaj kev tiv thaiv tsis zoo (zinc ib npaug lossis sib npaug rau 20μm). Aluminium-Magnesium alloy txau (arc tshuaj tsuag (arc tshuaj tsuag) tuaj yeem siv nyob rau hauv ib puag ncig tshwj xeeb, nrog kub tsis kam ntawm 500 degree.
Q2: Yuav ua li cas txheeb xyuas qhov zoo ntawm Galvanized Txheej Ntawm Q235 Steel Yeeb Nkab?
Lub thickness ntawm cov txheej zinc yog ntsuas los ntawm kev sib nqus tuab cov koob tshuaj Lub tooj kuaj tooj sulfate (GB / T2694) yog tsim nyog yog tias nws yog tsau 4 zaug yam tsis muaj hlau. Cov kev sim tshuaj nplaum nplaum kom siv cov txheej txheem hla kev (1mm spacing), thiab cov kab xev tom qab daim kab xev yog tsawg dua lossis sib npaug li 5%. Cov tsos kev soj ntsuam yuav tsum muaj qhov tsis xws luag xws li sagging thiab ploj plating. Tom qab galvanizing, passivation kev kho (chromate lossis chromium-pub dawb passivation) yuav tsum tau txhim kho corrosion tsis kam.
Q3: Kev ntsuas kev tiv thaiv li cas rau Q235 cov kav dej steel hauv cov av marine chaw?
Nws raug nquahu kom siv peb-txheej txheej txheem ntawm "epoxy zinc-primer (80μm) + epaceous ntawm cov xim sib xyaw (100μm) + polyurethane topcoat (60μm)". Thaj chaw tidal tau them nrog iav fiber ntau txhawb cov yas (frp) lossis monel alloy sheath. Kev tiv thaiv kab mob rau kev tua tuag Anode (Alloy Alloy Anode) yuav tsum yog tsim thiab teeb tsa raws li ISO15589. Underwater muaj peev xwm paub (-0.85 ~ -1.1v vs cse) yog nqa tawm tsis tu ncua (txhua 2 xyoos). Duplex stainless hlau muaj cov kav dej sib xyaw yuav tsum tau siv hloov Q235 rau qhov tseem ceeb.
Q4: Yuav ua li cas kho lub sab hauv phab ntsa ntawm Q235 steel yeeb nkab rau corrosion tiv thaiv?
Haus dej pipelines yog lined nrog xis mas cug (GB / T50268) nrog ib tuab ntawm 4 ~ 10mm. Ipn8710 tsis muaj tshuaj lom cov txheej (qhuav zaj duab xis ntau dua los yog sib luag rau 200μm) feem ntau siv rau cov raj xa roj. Cov khoom noj kev lag luam tuaj yeem electropolish stainless hlau lined pipes nrog qib ntawm RA0.8μm. Thaum thauj cov tshuaj chemical, cov yas hauv ob sab / pp) cov khoom yuav tsum tau xaiv raws li tus nqi PH. Ua ntej kev tsim kho tiv thaiv corrosion, sandblasting yuav tsum tau nqa tawm mus rau sa2.5 qib (GB / T8923), thiab lub thauj tog rau nkoj Txawv qhov tob yog 40 ~ 70μm.
Q5: Yuav ua li cas kho corroded Q235 steel kav?
Cov hauv zos corrosion (qhov tob tsawg dua li 10% phab ntsa tuab) tuaj yeem kho los ntawm arc disping (Zn / al), thiab nws yuav tsum tau polished rau st3 qib ua ntej txau. Loj-cheeb tsam corrosion yuav tsum hloov cov yeeb nkab seem, thiab cov kav dej tshiab thiab cov qub txeeg qub teg txuas nrog cov qauv zuaj puv cov qauv kev nkag siab. Kev kho ntawm sab nraud-corrosion txheej yuav tsum tau khawb ntawm 1.5 zaug txheej txheej rov ua raws li tus qauv qub. Tom qab kho, ib 48-teev siab xeem (1.5 zaug lub siab ua haujlwm) yuav tsum muaj. Corroded me me (seem phab ntsa thickness <70% ntawm tus qauv tsim) yuav tsum tau hloov raws li tag nrho.
