Cia peb saib ntawm cov txheej txheem ntau lawm rau SGCC galvanized steel los xij.
SGCC yog cov lag luam kev lag luam kub - dip galvanized steel ntawv txhais nyob rau hauv Japanese Jis txheem (JIS G3302). Nws cov txheej txheem tsim khoom feem ntau siv cov khoom siv txuas ntxiv rau kev siv hluav taws xob kub- dip galvanizing txoj kev (cov txheej txheem niaj hnub no). Cov txheej txheem tseem ceeb koom nrog kev raus dej txias {polled lossis kub}}}}}}}} Cov nplooj ntawv zinc los ua cov txheej txheem zinc rau saum npoo. Cov txheej txheem tshwj xeeb yog raws li hauv qab no:
1. Cov Khoom Siv Khoom Siv: Substrate Xaiv
SGCC substrates feem ntau tsawg - @} {rolled spcc lossis kub- rolled sphc). Lub substrate nto yuav tsum yog huv thiab tsis muaj qhov ntsuas hnyav lossis roj paug, uas tuaj yeem cuam tshuam cov nplaum ntawm cov txheej zinc txheej. Lub substrate thickness yog kho raws SGCC cov khoom yuav tsum tau (feem ntau 0.3-3.2mm).
2. Pretrealment: Tshem tawm cov npoo av kom ntseeg tau tias zinc txheej.
Pretreatment yog ib kauj ruam tseem ceeb hauv galvanizing zoo. Nws lub hom phiaj yog kom tshem tawm cov nplai, cov roj paug, thiab xeb los ntawm cov txheej txheem sib txawv, tso rau cov qauv hlau, kev yooj yim Zinc Txheej Adanesion. Degreasing: Siv kev ntxuav alkaline (xws li sodium hydroxide tov) los yog lwm yam organic impurities los ntawm cov xeb tshem tawm thiab zinc txheej adhesion.
Pickling: Soak lossis tshuaj tsuag cov phaj steel nrog cov roj ntsha roj acid los txiav tawm saum npoo Oxide, thiab lwm yam) thiab xeb, pom cov hlau huv. Tom qab pickling, yaug nrog dej kom tshem tawm residual acid thiab tiv thaiv corrosion ntawm substrate.
Kev tu electrolytic (yeem): rau substrates nrog cov yuav tsum tau muaj roj ntau dua, txhim kho kev huv si, txhim kho kev huv huv.
Annealing:
Txias -}} rolled substrates yog rhuab nyob rau hauv ib qho kev ua kom nruj dua rauv (700 {kom tshem tawm cov kev ntxhov siab yob thiab txhim kho cov hlau phaj. Ib txhij, nyob rau hauv ib qho chaw txo (xws li nitrogen + hydrogen), ib qho seem tshuav cov zaj duab xis nyob rau saum npoo yog txo kom muaj kev sib tw nrog zinc txheej. Yog hais tias qhov chaw zoo ntawm kub - rolled substrate yog qhov yooj yim, tsuas yog qhov ntsuas kub uas tsawg tuaj yeem ua tau.
3. Kub {{- dip galvanizing: tsim cov txheej zinc
Lub ntej -} Kho cov steel ntawv nkag mus rau cov txheej txheem galvanizing. Cov txheej txheem tseem ceeb cuam tshuam nrog cov hlau daim hlau hauv Molten zinc, qhov twg muaj zog zinc txheej yog tsim los ntawm ib tus hlau- zinc cov tshuaj tiv thaiv.
Zinc lauj kaub ntsw: cov ntawv steel yog cov hlau txuas txuas ntxiv nrog Molten zinc (kub muaj li 450 ° C). Zinc atoms nyob rau hauv lub Dinc Da Da Diffuse thiab kev tshwm sim nrog cov ntawv dub atoms ntawm cov ntawv steel saum npoo av, sib sau} txheej zinc txheej:
Cov txheej hauv qab: Hlau {- zinc aloy txheej (piv txwv li Δ thiab txiav txim siab zinc txheej ntawm zinc txheej;
Nruab nrab txheej: zinc -} Ik Hlau Txheej (η theem);
Txheej Txheej: Cov Txheej Ntshiab Zinc (η theem), uas muab kev tiv thaiv corrosion. Zinc Txheej Txheej Tswj: Cov riam cua (SGCC Zinc Txheej Dickness feem ntau yog z275, lossis 100-275g ib square meter) thiab xyuas kom meej.
IV. Post {{{{{}}} Ua: txhim kho kev ua tau zoo thiab zoo li
Txias: Galvanized steel ntawv yog dej -}}} o} oli olidation thiab ruaj khov rau cov txheej txheej zinc.
Passivation: ib zaj yeeb yaj kiab passivation (xws li chromate passivation lossis chromium txheej saum npoo av rau catally passion (zinc hydroxide), thiab txhim kho corrosion tsis kam.
Roj txheej (yeem): Rau cov khoom uas yuav tsum tau ua luv {}} luas ua (xws li}}} Rust rau saum npoo kom txo tau xeb thaum lub sijhawm khaws cia.
Xov: Cov ntawv steel yog ncaj siv lub tshuab ncaj thiab txiav rau ntev ntev (xws li coils lossis daim ntawv tiaj tus). Tom qab dhau qhov kev kuaj xyuas zaum kawg, nws khaws cia. Cov txheej txheem nta: SGCC siv tas li kub - kev ua haujlwm zoo nkauj, ua rau muaj kev tsim nyog rau cov loj- scale industrial industrial. Cov tub ntxhais ntawm cov txheej txheem no cuam tshuam ua ntej - Kev kho mob kom ntseeg tau tias yuav ua kom muaj kev nyiam ua kom huv si, thiab kev tswj hwm zinc txheej ceev los ntawm dip galvanizing. Qhov tshwm sim yog galvanized steel ntawv uas yog ob leeg corrosion {{{ovatile thiab ntau yam kev xav tau ntawm kev tsim kho, cov khoom siv hauv tsev, thiab kev lag luam.