Corrosion tiv thaiv thiab cov tswv yim kev txhais
Q1: Dab tsi yog cov khoos phis tawm ua tau zoo tshaj plaws rau Q355B kav dej hauv cov av marine chaw?
A1: Cov ntawv thov marine xav tau cov tshuab sib zog rau Q355B kav. Peb - txheej polyethylene (3LPE) cov txheej txheej ua rau muaj 300 {}}}} 500 âness. Rau submerged tej yam kev mob, Epoxy txheej txheem txhawb nqa nrog iav flakes muaj cov nplaum zoo dua thiab cov cathodic disporance. Cov kab txaws tau txais txiaj ntsig los ntawm Polyurethane Topcoats dhau Epoxy Primers rau UV tsis kam. Duplex tshuab ua ke thermal {{}}} txau txhuas nrog cov organic saladage xa 30+ xyoo lub neej. Tsis ntev los no kev hloov kho tau xws li graphene -} modifify epoxies uas txo cov permeability los ntawm 70% piv rau cov tsho tiv thaiv cov pa. Cov txheej txheem npaj kom zoo rau SA 2.5 tus qauv thiab cov txheej txheem ua ntaub ntawv nruj yog qhov tseem ceeb - suav nrog kev txheeb xyuas cov hnub so thiab hnub so thaum 5kv / hli. Cov kab ke no yuav tsum sib xws nrog kev tiv thaiv Cathodic thaum siv nyob rau hauv cov ntawv thov submerged.
Q2: Yuav ua li cas cathrodic kev tiv thaiv ua ke nrog Q355B yeeb nkab system?
A2: Cathodic Kev Tiv Thaiv (CP) rau Q355B kav yuav tsum tau ua tib zoo tsim. Kev siv tam sim no siv rectifiers thiab anode grids rau kev teeb tsa loj, thaum lub sij hawm kev tua tsiaj (feem ntau zinc lossis txhuas) haum cov tshuab me me. Kev tiv thaiv muaj peev xwm yuav tsum tau tswj hwm nruab nrab ntawm - 0.85V rau -1.1v vs cu / cuso4 kev siv khoom electrode. Kev tiv thaiv dhau-hauv qab -1.1v phom sij hydrogen embrittlement. Cov teeb meem tseem ceeb muaj xws li cov kev tshawb fawb tseem ceeb, yuav tsum muaj qhov ceev tam sim no (feem ntau 10-20mA / m²), thiab txheej zoo. Cov pob qij txha sib cais tiv thaiv cov dej ntws tam sim no kom muaj cov qauv sib txuas. Saib xyuas cov dej num nrog siv cov hluav taws xob txheeb xyuas cov qib kev tiv thaiv txhua xyoo. Niaj hnub nimno Systems teeb tsa cov chaw taws teeb saib xyuas nrog cov kev hloov kho tau zoo. CP feem ntau txuas cov txheej txheej lub neej los ntawm 2-3 lub sij hawm thaum tsim tau zoo thiab tswj hwm.
Q3: Cov kev coj ua zoo tshaj plaws rau kev tiv thaiv kev tiv thaiv corrosion hauv qab rwb thaiv tsev (cui)?
A3: Cov kev tiv thaiv CUi zoo rau Q355B kav suav nrog ntau lub tswv yim. Thermal tsuag txhuas (tsa) muab kev tiv thaiv zoo dua hauv qab rwb thaiv tsev ntawm 500 degree. Rau qhov qis dua kub, siab- qhov kub opoxy (ntau dua los yog sib npaug rau cov dft kom raug. Rwb thaiv tsev kev tsim qauv yuav tsum suav nrog cov chaw lim dej thiab kev sib khi kom zoo ntawm pob qij txha. Stainless hlau banding tiv thaiv cov dej tso dej zoo dua li cov txheej txheem tsoos. Cov kev pabcuam tshuaj ntsuam yuav tsum muaj cov kev tshem tawm lub sijhawm thaum muaj kev ncua sij hawm ntawm high- kev pheej hmoo ntawm thaj chaw (feem ntau txhua txhua 5 xyoos). Tshiab thev naus laus zis zoo li hydrophobic airgel rwb thaiv tsev tiv thaiv dej nkag thaum muab kev ua haujlwm thermal. Kev soj ntsuam cov txuj ci suav nrog cov kev qhia ntub dej suav nrog kev kuaj kom ntub dej kom pom thiab pulsed eddy rau zais corrosion kev ntsuas. Cov kev ntsuas no muaj kev pheej hmoo txo cov kev pheej hmoo ntawm cov lej rau 40-60 ntawm cov yeeb nkab tsis ua tiav hauv cov txheej txheem kev lag luam.
Q4: Yuav ua li cas galvanic corrosion ntawm Q355B thiab lwm yam metres yuav tswj hwm?
A4: Galvanic Corrosion tswj yuav tsum tau cov kev mus ze. Cov khoom siv insulating nrog dielectric spacers thiab tes tsho yog Q355b los ntawm ntau cov hlau uas muaj hlau loj zoo li tooj liab lossis hlau. Thaum sib cuag ncaj qha yog zam tsis tau, xaiv cov hlau nyob ze hauv Galvanic Series (Muaj Peev Xwm Sib Txawv<0.15V). Cathodic protection can offset galvanic currents in immersed applications. Protective coatings should cover both metals, with the more noble material coated preferentially. Area ratios should be maintained so the anode (Q355B) has much larger surface area than the cathode. Regular inspection of junction points is essential, with more frequent intervals in aggressive environments. In critical applications, transition pieces using compatible filler metals can bridge dissimilar materials safely. These measures prevent accelerated corrosion that could compromise system integrity.
Q5: Dab tsi yog qhov tawm ntawm cov qauv hauv kev saib xyuas corrosion rau Q355B kav?
A5: Advanced corrosion saib xyuas thev naus laus zis yog hloov kho cov tswv yim txij nkawm. Wireless sensor tes hauj lwm muab tiag - lub sij hawm phab ntsa thickness ntsuas siv ultrasonic lossis electromagnetic cov tswv yim. Cov coupons ntse nrog tsim - hauv sensors muab cov kab mob corrosion tiag tiag. Faib fiber ntau optic hnov pom corrosion hotspots raws li txoj kev tso dej txuas ntxiv. Tshuab kawm algorithms soj ntsuam ntau cov ntaub ntawv ntws kom kwv yees corrosion corrosion nrog 85 {} 90% raug. Robotic Crawlers ua yeeb yam hauv kev tshuaj xyuas sab hauv uas tsis muaj kaw kaw. Cov kev sib xyaw digital sib xyaw ua ke pub rau virtual simulation ntawm cov kev sib txawv corrosion sib txawv. Cov thev naus laus zis pab tau mob- thaum muaj kev soj ntsuam, muaj feem cuam tshuam cov nqi corrosion los ntawm 30-50% thaum txhim kho kev ntseeg tau. Kev siv yuav tsum tau ceev faj qhov kev tso kawm thiab cov ntaub ntawv tswj cov khoom siv rau kev ua kom tau tus nqi ntau.
