1: Lub thicker zinc txheej ntawm cov xim galvanized-coated coil, qhov zoo dua qhov kev tiv thaiv kev ua haujlwm corrosion?
Teb: Tsis tas li. Lub thickness ntawm zinc txheej, lub sij hawm ntev dua rau cov xeb liab tshwm nyob rau ntawm lub substrate, thiab lub neej ntev dua los tiv thaiv -corrosion nyob rau hauv tib corrosive ib puag ncig. Tab sis kev tiv thaiv -corrosion kev ua tau zoo kuj yog nyob ntawm qhov sib xws ntawm zinc txheej, nws qhov adhesion, qhov zoo ntawm kev kho mob passivation thiab thaiv cov nyhuv ntawm cov xim -coated topcoat. Yog hais tias zinc txheej yog tuab heev, ua rau txo adhesion los yog brittleness ntawm zinc txheej, tag nrho cov kev tiv thaiv yuav raug txo.
2: Dab tsi yog qhov tsis zoo ntawm cov zinc txheej tuab?
Teb: Cov teeb meem tseem ceeb nrog cov zinc txheej tuab heev yog raws li hauv qab no:
Deterioration ntawm kev ua tau zoo: Cov txheej zinc tuab yog nquag ua rau tawg lossis hmoov thaum khoov thiab stamping, uas cuam tshuam rau qhov zoo li thiab tiv thaiv -corrosion.
Qhov nyuaj hauv kev vuam: tuab zinc txheej yuav ua rau muaj kuab paug thiab electrode muaj kuab paug thaum lub sij hawm vuam, ua rau vuam lub zog tsis ruaj khov.
Tus nqi nce ntxiv: tus nqi ntawm zinc yog siab dua, lub thickness ntawm zinc txheej yog ob npaug, thiab tus nqi ntawm raw cov ntaub ntawv yuav nce 20% mus rau 30%.
Adhesion txaus ntshai: Lub zog sib txuas ntawm cov zinc txheej thiab cov substrate uas tuab heev tuaj yeem txo qis, thiab muaj qhov phom sij zais ntawm zinc txheej tev tawm tom qab siv sijhawm ntev -.
3: Yuav ua li cas xaiv qhov tsim nyog zinc txheej tuab raws li kev siv ib puag ncig?
Teb: Lub hauv paus ntsiab lus ntawm "tau txaus tab sis tsis dhau" yuav tsum ua raws li:
Qhov chaw qhuav hauv tsev (xws li cov vaj huam sib luag sab hauv ntawm cov rooj tog zaum thiab cov khoom siv hauv tsev): zinc txheej 40 ~ 60g / m² (ob -sided) yog txaus, feem ntau yog tso siab rau cov xim txheej rau kev tiv thaiv - corrosion.
Ib puag ncig sab nraud (xws li xim hlau vuas, laj kab): 80 ~ 120g / m² raug pom zoo.
Cov av noo siab / kev lag luam muaj kuab paug / ib puag ncig ntug dej hiav txwv: 150 ~ 180g / m² raug pom zoo, lossis siab dua (xws li 200g / m² lossis ntau dua).
Hnyav corrosion los yog lub neej ntev (xws li cov nroj tsuag tshuaj, seaside vaj tsev): 180 ~ 275g / m² tuaj yeem siv tau, tab sis cov txheej txheej tuab lossis txheej txheej tshwj xeeb yuav tsum tau ua.
4: Puas muaj cov qauv lossis cov kev qhia tshwj xeeb uas tau teem caij rau lub thickness ntawm zinc txheej?
Teb: Yog. Siv lub teb chaws tus qauv GB/T 12754 (xim -coated steel daim hlau thiab steel strips) ua piv txwv, uas quotes tus txheej txheem substrate GB/T 2518. Feem ntau cov thickness ntawm zinc txheej yog pom zoo raws li nyob rau hauv daim ntawv cog lus los ntawm ob tog, tab sis nws yuav tsum tau raws li:
Ib txheej zinc tuab heev (xws li ntau tshaj 275g / m² ntawm ob sab) yuav ua tsis tau raws li tus qauv 0T lossis 1T dabtsi yog khoov kuaj, ua rau cov txheej txheem tawg.
Rau cov xim -coated coils, qhov sib piv ntawm zinc txheej rau txheej curing thiab adhesion yuav tsum tau txiav txim siab thaum lub sij hawm tsim khoom. Ntau cov txheej txheej muaj qhov txwv siab tshaj plaws rau cov tuab ntawm zinc txheej ntawm lub substrate (xws li tsis ntau tshaj 180g / m²), txwv tsis pub cov txheej txheem ua ntej thiab ci yuav tsum tau hloov kho.
Hauv kev siv tiag tiag, cov khoom lag luam ntawm cov xim galvanized-coated coils tshaj 200g / m² yog me me, thiab feem ntau ntawm lawv yog cov khoom lag luam customized.
5: Nyob rau hauv lub hauv paus ntawm kev ua kom muaj kev tiv thaiv corrosion, puas muaj ib qho kev daws teeb meem ntau dua li tsuas yog thickening txheej zinc?
Teb: Yog. Ib qho kev daws teeb meem zoo dua yog "txhim kho qhov sib koom tes tsim":
Zinc txheej + siab- txheej txheej passivation zoo: Txhim kho qhov kev tiv thaiv ntawm zinc txheej kom dawb xeb, thiab tseem muab kev tiv thaiv cathodic tom qab khawb me ntsis.
Zinc txheej + siab -kev ua tau zoo primer: xws li epoxy primer lossis polyurethane primer, uas tuaj yeem txhim kho kev sib txuas ua ke thiab kev ua haujlwm tsis zoo.
Zinc-aluminium-magnesium txheej: Piv nrog cov zinc ntshiab, qhov kev tiv thaiv corrosion yog 2 mus rau 5 npaug siab dua ntawm tib lub thickness, thiab qhov incision muaj zog rau tus kheej - kho muaj peev xwm tsis muaj thickening ntau.
Ua kom lub thickness ntawm lub topcoat los yog xaiv ib tug check topcoat (xws li PVDF, HDP): nws yog ntau yig thiab muaj zoo processability tshaj tsuas yog thickening zinc txheej.