1. Cov khoom siv hauv tsev twg yog qhov tsim nyog rau galvanized steel coils? Lawv cov ntawv thov raug dab tsi?
Teb: Daim ntawv thov ntawm galvanized steel coils hauv cov khoom siv hauv tsev yog nyob ntawm cov khoom tshwj xeeb thiab tsis tuaj yeem ua dav dav. Hauv kev lag luam hluav taws xob qhov cub, galvanized steel ntawv yog ib qho khoom siv rau sab hauv vim nws yog tus nqi qis -, tuaj yeem tiv taus qhov kub txog li 300 degrees Celsius, thiab muaj qee qhov kev tiv thaiv corrosion, ua tau raws li qhov xav tau ntawm cov qhov cub hauv tsev feem ntau (feem ntau ua haujlwm ntawm 250 degrees Celsius). Nyob rau hauv cov khoom siv hauv tsev thiab cov kab noj hniav ntawm cov khoom siv me me xws li microwave ncu, cov khob cij, cov kiv cua hluav taws xob, thiab cov tshuab nqus tsev vacuum, cov ntawv galvanized kuj tau siv dav los ua kev txhawb nqa, muab faib, thiab cov kab noj hniav sab hauv. Txawm li cas los xij, hauv cov tshuab hluav taws xob ua dej kub, galvanized interiors yog qis dua -kev xaiv kawg. Feem ntau, ib qho thermosetting resin yog siv rau txheej txheej galvanized. Vim hais tias sab hauv yog tas li raug cua sov ib puag ncig ntawm 70 mus rau 80 degrees Celsius, cov resin kho yog nquag hydrolysis, thiab zinc tiv thaiv txheej nws tus kheej muaj tsis zoo xeb kuj thiab ib tug luv luv lifespan, ua rau nws tsuas yog haum rau cov uas tsis muaj nqi - khoom. Hauv qhov sib piv, cov nruas sab hauv lossis cov khoom siv sab hauv (xws li kiv- cov khoom siv lub tshuab ziab khaub ncaws thiab cov pa cua) ntawm cov tshuab ntxhua khaub ncaws thiab cov cua txias sab hauv tsev feem ntau yog ua los ntawm cov ntawv hlau galvanized vim tias cov khoom no tsis ncaj qha mus rau qhov kub thiab txias, thiab cov txheej txheem galvanized tuaj yeem muab kev tiv thaiv txaus. Yooj yim muab tso, galvanized coils yog tsim rau cov nruas sab hauv thiab cov khoom siv sab hauv hauv qhov chaw qhuav lossis ib txwm ua haujlwm kub, tab sis lawv ua haujlwm tsis zoo nyob rau hauv cov ntawv siv nruas nyob rau hauv ntev -lub sij hawm kub, high humidity, los yog siab tej yam kev mob.
2. Lub hauv paus ntsiab lus tiv thaiv corrosion yog dab tsi thaum galvanized coils siv rau cov khoom siv liner? Dab tsi ntawm kev tiv thaiv corrosion tuaj yeem ua tiav hauv kev ntsuas ntsev tsuag?
Teb: Kev tiv thaiv corrosion ntawm galvanized coils yog qhov tseem ceeb "sacrificial anode tiv thaiv," txhais tau hais tias zinc yog reactive dua hlau. Nyob rau hauv ib puag ncig corrosive, zinc txheej nyiam oxidizes, yog li tiv thaiv lub hauv paus steel substrate los ntawm corrosion. Simultaneously, zinc forms a dense zinc oxide protective film in humid and room-temperature air, further blocking the penetration of corrosive media such as water vapor and oxygen. Nyob rau hauv ib puag ncig kev ua haujlwm ntawm cov khoom siv hauv tsev (piv txwv li, sab hauv tsev, tsis yog - cov av noo tsis tu ncua, tsis yog -acidic / alkaline ib puag ncig), qhov kev tiv thaiv corrosion no muab kev tiv thaiv txhim khu kev qha. Quantitatively, nyob rau hauv ib tug standard neutral ntsev tshuaj tsuag (xa mus rau GB / T 10125 tus qauv, siv 5% sodium chloride tov ntawm 35 degrees Celsius), cov pa galvanized los xij feem ntau ua tiav 72 mus rau 120 teev yam tsis muaj xeb liab, thaum siab -zinc kub-dip 4 xuab moos tuaj yeem ua tiav cov ntsev ntsev. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov khoom siv hauv lub tso tsheb hlau luam tsis raug ncaj qha rau qhov chaw tshuaj tsuag ntsev; Cov ntaub ntawv no ua haujlwm feem ntau yog qhov taw qhia siv rau kev ntsuas cov khoom siv tiv thaiv corrosion. Hauv kev siv cov khoom siv tiag tiag, lub neej ntev ntawm lub tank sab hauv galvanized nyob ntawm zinc txheej tuab, kev ua haujlwm kub, av noo hloov pauv, thiab kev tu txhua hnub. Piv txwv li, lub tank sab hauv ntawm lub qhov cub hluav taws xob, vim nws qhov kev ua haujlwm siab thiab ib puag ncig qhuav, tuaj yeem muaj cov ntawv galvanized uas kav ntev li ob peb xyoos lossis ntau tshaj kaum xyoo; Thaum lub tank sab hauv ntawm lub tshuab hluav taws xob hluav taws xob, vim tias nws tau muab tso rau hauv dej kub tas li, muaj kev cuam tshuam sai dua zinc txheej depletion.
3. Yuav ua li cas galvanized steel puab tank piv rau stainless hlau thiab enamel nyob rau hauv cov nqe lus ntawm corrosion kuj thiab nqi-effectiveness?
Teb: Qhov no yog lo lus nug tseem ceeb ntawm tus nqi -kev ua tau zoo, thiab tsis muaj lus teb kiag li. Nws nyob ntawm hom thiab qhov chaw ntawm cov khoom siv. Siv lub tshuab rhaub dej kub hauv lub tank ua piv txwv, peb cov ntaub ntawv tsim tus nqi meej -kev ua haujlwm gradient: Stainless hlau sab hauv lub tank muaj lub neej ntev tshaj plaws (txog 15 xyoo lossis ntau dua), tab sis yog qhov kim tshaj plaws, thiab yuav tsum muaj cov qauv vuam siab heev, nrog rau cov vuam seams ua rau lub sij hawm ntev - corrosion corrosion; Enameled inner tanks yog nruab nrab -ntau, xeb- dawb, thiab raug nqi li ntawm ib -quarter rau ib- thib rau ntawm stainless hlau sab hauv tso tsheb hlau luam, tab sis yog tias cov txheej txheem tsim khoom tsis ua kom zoo dua qub, enamel chipping yuav tshwm sim, thiab ib zaug chipped, corrosion thiab perforation yuav tshwm sim; Galvanized inner tanks muaj tus nqi qis tshaj plaws, tab sis kuj yog luv luv lifespan. Cov txheej tiv thaiv zinc feem ntau tsuas yog li 0.06 hli tuab, ua rau nws tsis tshua muaj rusting nyob rau hauv cov dej kub qhov chaw ntawm 70 mus rau 80 degrees Celsius, thiab tsuas yog siv nyob rau hauv qis- cov khoom nqi. Siv cov txheej txheem sab hauv ntawm lub qhov cub hluav taws xob ua piv txwv, galvanized steel ntawv muaj tus nqi qis tshaj plaws, tuaj yeem tiv taus qhov kub thiab txias ntawm 300 degrees Celsius, thiab muaj qee qhov kev tiv thaiv corrosion, raws li kev xav tau ntawm tsev neeg; enamel inner liners muaj zog oxidation thiab corrosion kuj thiab raug suav hais tias yog cov khoom noj qab haus huv thiab ib puag ncig zoo; stainless hlau sab hauv liners muaj qhov zoo tshaj plaws corrosion kuj tab sis yog kim tshaj plaws. Hais txog tus nqi, galvanized ntawv nqi kwv yees li 4,000 txog 6,000 yuan ib tuj hauv kev lag luam hauv tsev, thaum stainless hlau ntawv nqi 8,000 txog 15,000 yuan ib tuj lossis ntau dua. Tus nqi ntawm cov ntawv galvanized tsuas yog kwv yees li ib -feem peb ntawm stainless hlau. Yog li ntawd, galvanized coils tsim nyog rau cov khoom siv hauv tsev nrog cov kev xav tau ntawm kev tiv thaiv corrosion, kev cia siab rau lub neej ntawm 5 mus rau 8 xyoo, thiab tus nqi rhiab heev, tshwj xeeb tshaj yog nyob rau hauv qhuav los yog kub kub ua hauj lwm qhov chaw uas lawv cov nqi -kev ua tau zoo tshaj plaws.
4. Thaum galvanized coils tau ua tiav rau hauv cov kab hauv qab, puas yuav stamping thiab vuam puas rau txheej galvanized? Yuav ua li cas lub zuag qhia tag nrho los tiv thaiv -corrosion nyhuv ntawm lub puab liner yuav lav tau?
Teb: Qhov no yog ib qho teeb meem uas yuav tsum tau daws nyob rau hauv zus tau tej cov galvanized coil inner liners. Tom qab cov nplooj ntawv galvanized tau ua tiav xws li txiav thiab stamping, zinc txheej yuav raug puas tsuaj ntawm cov npoo txiav thiab xuas nrig ntaus. Nyob rau hauv cov huab cua ntub thiab kub, cov npoo no tsis tshua muaj kev cuam tshuam rau corrosion, ib qho teeb meem uas tseem plagues ntau cov tuam txhab hlau. Ib yam li ntawd, cov txheej txheem vuam kuj tseem yuav ua rau cov zinc txheej puas. Zinc lub melting point yog kwv yees li 420 degrees Celsius, thaum qhov kub ntawm cov pa fusion vuam yog ntau dua qhov no. Cov txheej zinc hauv qhov vuam thiab ib puag ncig yuav raug hlawv tag nrho thaum vuam. Tom qab welding, weld nto yuav tsum yog hauv av kom tshem tawm cov weld slag thiab hlawv zinc txheej, nthuav tawm cov hlau huv si, thiab tom qab ntawd kub tshwj xeeb -dip galvanized kho txheej yuav tsum tau txau lossis txhuam rau. Raws li ISO cov qauv rau kev kho kub-dip galvanized welds, tshwj xeeb kub-dip galvanized kho txheej yuav tsum muaj zinc hmoov cov ntsiab lus ntau dua 90%. Rau stamped thiab txiav npoo, kev lag luam tam sim no siv txoj hauv kev xws li siv zinc- cov xim nplua nuj los yog siv cov qauv flange hauv kev tsim los zais cov npoo ntawm qhov tsis sib chwv. Qee cov txheej txheem tsim khoom siv qib siab siv cov vuam vuam (xws li qhov chaw vuam) rau cov cua sov hauv cheeb tsam los tswj cov cua sov- thaj chaw cuam tshuam, lossis siv cov cua sov{17}} pub dawb txoj kev sib koom xws li riveting thiab undercutting kom tsis txhob loj - cheeb tsam puas rau cov zinc txheej. Feem ntau, siv cov galvanized coils ua cov kab hauv sab hauv yog ua tau, tab sis ua tiav "post-weld zinc ntxiv thiab tiv thaiv ntug" txheej txheem txheej txheem yog qhov tseem ceeb; txwv tsis pub, qhov kev tiv thaiv corrosion lifespan ntawm sab hauv liner yuav raug txo kom tsawg. Hauv kev tsim khoom loj, qhov no yuav tsum tau tsim cov txheej txheem kev ua haujlwm nruj thiab xaiv cov khoom siv kho kom tsim nyog.
5. Dab tsi yog qhov kev txwv ib puag ncig ntawm kev siv galvanized coils rau cov khoom siv liner? Dab tsi yuav tsum tau tsom rau thaum xaiv cov khoom?
Teb: Galvanized coils tsis yog ib qho kev daws teeb meem thoob ntiaj teb rau tag nrho cov khoom siv liner. Lawv txoj kev siv ua rau muaj kev pheej hmoo tseem ceeb hauv cov cheeb tsam hauv qab no, thiab txawm tias poob siab: Ua ntej, ncua ntev - qhov kub thiab txias ib puag ncig, xws li lub tank cia ntawm lub rhaub dej kub. Cov dej kub ntawm 70-80 degrees Celsius yuav ua kom cov hydrolysis thiab noj cov zinc txheej, ua rau lub neej luv dua li cov enamel thiab stainless hlau. Qhov thib ob, ib puag ncig uas muaj zog acid thiab alkali corrosion, xws li cov alkaline detergent ib puag ncig hauv lub tshuab ntxuav tais diav, yuav ua rau cov zinc txheej ua rau tsis zoo thiab ua tsis tau sai. Thib peb, tsis tu ncua cov av noo thiab cov cua tsis zoo nyob rau hauv cov kab noj hniav tuaj yeem ua rau cov xeb dawb (cov zinc oxide tuab tuab). Thaum qhov no tsis tuaj yeem ua rau cov hlau tsis zoo tam sim ntawd, nws yuav siv cov zinc txheej tsis tu ncua thiab cuam tshuam rau cov tsos. Thaum xaiv cov khoom, cov kev txwv hauv qab no yuav tsum tau ua tib zoo xav: Ua ntej, txheej txheem galvanizing. Kub-dip galvanized steel (SGCC) yog qhov nyiam, nrog cov txheej tuab ntawm 50 txog 100 micrometers thiab lub neej nyob sab hauv tsev ntawm 8 txog 12 xyoos. Electro-galvanized steel (SECC) muaj txheej tuab ntawm tsuas yog 2 txog 25 micrometers thiab lub neej ntev li ntawm 5 xyoos, tab sis nws lub ntsej muag zoo li qub thiab du, ua rau nws haum rau qhov siab - qhov tseeb. Qhov thib ob, zinc txheej hnyav. Rau cov khoom siv sab hauv tsev, zinc txheej hnyav tsis pub tsawg dua 80 grams ib square meter. Rau cov khoom nyob rau hauv siab -cov av noo ib puag ncig los yog muaj kev pheej hmoo ntawm condensation, ib tug luj ntawm 180 grams ib square meter los yog siab dua. Thib peb, cov khoom siv hauv paus qib. Rau sab hauv uas xav tau kev kos duab sib sib zog nqus (xws li cov kab noj hniav hauv qhov cub), qhov sib sib zog nqus- kos cov qib steel nrog siab elongation yuav tsum raug xaiv kom tsis txhob muaj zinc txheej puas los ntawm stamping tawg. Plaub, tus ncej- txoj kev kho mob. Txawm hais tias muaj tus ntiv tes - tiv thaiv txheej los yog kev kho mob passivation yuav cuam tshuam rau saum npoo corrosion thiab cov ntiv tes tiv thaiv tom qab ua tiav. Thib tsib, kev txhawb nqa txheej txheem muaj peev xwm. Tshawb xyuas seb tus neeg muag khoom puas muaj cov txheej txheem kev khiav hauj lwm rau tom qab vuam zinc ntxiv thiab kev tiv thaiv ntug, uas ncaj qha txiav txim siab qhov sib xws ntawm cov khoom batch.