Corrosion tiv thaiv thiab txheej tshuab
Q1: Dab tsi yog thawj kev tiv thaiv corrosion cov hau kev rau Q355b kav rau hauv cov chaw sib txawv?
A1: Q355B Yeeb Nkab Kev Tiv Thaiv Corrosion ntau yam sib txawv los ntawm ib puag ncig:
Atmospheric raug: Kub {- dip galvanizing (50-855 Epoxy / Polyurethane txheej tshuab (200-400μm) Kev xaiv xim rau cov ntawv thov ua vajtsev.
Faus cov ntawv thov: Peb {{{{{{}} txheej polyethylene tshuab (30μm) ua ke (200μm), thiab polyethylene topcoat (2-3mm) rau30+ xyoo lub neej. Cathodic Kev Tiv Thaiv (-0.85V rau -1.1V vs cse) yog feem ntau ua ke nrog txheej txheej.
Marine ib puag ncig: Duplex tshuab nrog thermal -} ov nroj Tsuag txhuas (150-200μm) outperform hauv cov saws thaj chaw txaws. Hauv qab dej, txaus siab tam sim no Cathodic kev tiv thaiv yog ntxiv.
Tshuaj Nroj Tsuag: High {- tsim epoxy novolac txheej txheem (500-1000μm) tiv taus cov kua kub / alkalis ntawm qhov kub.
Kev Pabcuam Kub Kub: Inorganic zinc siinc siate txheej (75-150μm) withstand txog li 400℃tsis tu ncua.
Q2: Yuav ua li cas qhov chaw npaj ua cas cuam tshuam rau txheej ua haujlwm ntawm Q355B kav?
A2: Kev npaj saum npoo yog qhov tseem ceeb rau txheej txheej thiab thiav:
Cov Abrasing Blastingrau sa 2.5 (ISO 8501-1) tag nrho cov zeb nplai thiab tsim 40-80μm rau ntawm lub profile profile
Kev txawj nqus ntxuav(SSPC -} sp1) tshem tawm cov roj / roj uas ua rau cov nplaum ua tsis tiav
Soluble ntsev txwvyuav tsum yog<3μg/cm² chloride, <10μg/cm² sulfate to prevent underfilm corrosion
Nto roughness(RZ) Yuav tsum phim cov txheej yuav tsum tau - ib txwm muaj 30-70μm rau feem ntau cov txheej txheej
Ib puag ncig tswjyuav tsum tau txheeb ze cov av noo<85% and surface temperature ≥3°C above dew point
Lub sij hawm los txheejyuav tsum yog<4 hours after blasting to prevent flash rust
Kev kuaj xyuassuav nrog kev ntsuam xyuas kab xev rau kev ntxuav cov kab xev thiab cov kab xev rau cov kab xev profile
Q3: Qhov kawg ntawm kev nce qib hauv Pipeline txheej Technologies rau Q355B kav?
A3: Cov txheej txheej thev naus laus zis muab kev txhim kho tseem ceeb:
Graphene -} Enhanced EposiesTxo cov permeability los ntawm 70% thaum tswj vaj tse yooj yim
Tus kheej -} kho cov xim citeeb tsa microcapsules (1-100μm) uas tso tawm cov tshuaj tiv thaiv mob corrosion thaum puas
Superhydophobic chaw with nano-textures achieve water contact angles >150 Qib
Photocatalytic TxheejSiv Tio2 Nanoparticles tsoo cov paug organic
Thermal Tsuag Txau Txau Txau Txau TxauDeposits Zinc / txhuas tsis muaj cua sov -} cuam tshuam zones
Lub Tsho Ntsuas Pob NtsegNrog pH - Cov ntawv qhia rhiab pom underfilm corrosion
High - drawb / qis - vocCov qauv tam sim no ua tiav 95% + cov ntsiab lus khib nyiab
Q4: Yuav ua li cas cathodic tiv thaiv cov txheej txheem rau kev faus Q355b pipelines?
A4: Siv tau CP tsim nyog yuav tsum muaj ntau txoj kev txiav txim siab:
Cov kev xav tau tam sim no: Feem ntau yog 10-20mA / m² rau cov kav dej coated (sib txawv los ntawm cov av tiv taus)
Anode xaiv:
Kev fij (galvanic) anodes (mg / zn) rau tsawg - tam sim no, luv pipelines
Kev qhuas tam sim no (ICCP) siv MMO / TI Anodes rau cov kab ke loj
Kev Siv Hluav Taws Xob: Cu / cuso4 hlwb spaced txhua 1-2km
Muab cais nyob ib leeg: Insulating flanges tiv thaiv cov kua dej tam sim no kom txuas cov qauv sib txuas
Pluaj tam sim no: Kuaj Chaw Noj Xyuas Xyuas thiab Kev Cuam Tshuam Tso Cai
Xyuas: Cov chav ua chaw taws teeb saib xyuas nrog GSM kis tau muab tiag -} cov ntaub ntawv
Tsim Lub Neej: Anode tshuab yuav tsum phim cov raj xa hluav taws xob tsim lub neej (feem ntau 20-30 xyoo)
Q5: Dab tsi yog qhov kev coj ua zoo tshaj plaws rau txheej daim ntawv thov thiab tshuaj xyuas ntawm Q355B kav?
A5: Daim ntawv thov kom zoo thiab tshuaj ntsuam xyuas kom yooj yim txheej ua haujlwm:
Txoj kev thov:
Txau daim ntawv thov (Aus tsis muaj pa / pa) rau feem ntau txheej txheem txheej txheem
Electrostatic Txau Txhim Kho Kev Hloov Mus Kev Hloov Kho
Ntau lub tshuab tiv thaiv ntau lub tshuab rau kev nrawm - kho epoxies
Kev Kho Tus Tswj:
DFT kev ntsuas thaum lub sijhawm / ua raws li daim ntawv thov
Kub / Vaum Saib Xyuas
Kho Sij Hawm Npaum Lub Sij Hawm (Mek RUB xeem)
Tshuaj Ntsuam Xyuas Cov Cai:
100% Nrhiav Kom Tau Nyiaj Hnub So (5KV / hli rau Epoxy, 3KV / hli rau Polyurethane)
Cov tshuaj nplaum nplaum (hla - txiav / tev chant)
DAFT PERFICE (10 Kev nyeem rau ib cov yeeb nkab tsawg kawg)
Kho cov txheej txheem:
Defects >1% ntawm thaj chaw sab nraud yuav tsum muaj kev ua kom tau txais tag nrho
Me tsis xws luag kho nrog cov ntaub ntawv tshaj
Tis tres rau kev hloov pauv
Ntawv sau:
Txhua hnub cov cav ntawm ib puag ncig cov xwm txheej
Txheej batch lej thiab daim ntawv thov tsis sib haum
Kev soj ntsuam cov ntawv tshaj tawm nrog cov duab digital
