1.Yuav ua li cas zoo galvanized coils thiab txhuas-zinc coated coils daim ntawv?
Galvanized Coil (GI):
Qhov zoo: Cov txheej zinc ntshiab yog qhov muag muag, muaj qhov zoo ductility thiab lubrication. Thaum lub sij hawm stamping, dabtsi yog khoov, thiab sib sib zog nqus nqus cov txheej txheem, zinc txheej deforms nrog rau lub substrate tsis yooj yim tawg los yog tev, ua rau nws tshwj xeeb tshaj yog haum rau complex qhov chaw uas yuav tsum tau sib sib zog nqus nqus nqus nqus.
Qhov tsis zoo: Nyob rau hauv huab cua deformation, "zinc shavings" lossis "powdering" tuaj yeem tshwm sim, kis kab mob.
Aluminium-Zinc Coated Coils (GL):
Qhov zoo: Aluminium-zinc alloy txheej (55% Al, 43.4% Zn, 1.6% Si) muaj hardness siab dua li cov zinc ntshiab, muab nws zoo dua khawb thiab rigidity.
Disadvantages: Vim nws qhov nyuaj thiab nkig ntau dua, cov txheej txheej tsis zoo dua li cov zinc ntshiab. Microcracks yog nquag tsim nyob rau hauv txheej thaum lub sij hawm ntse dabtsi yog khoov los yog sib sib zog nqus kos duab. Thaum cov microcracks no feem ntau tsis tuaj yeem ua rau lub substrate corrosion (vim lub txheej nws tus kheej yog corrosion-resistant), lawv tsis haum rau qhov sib sib zog nqus- kos qhov chaw uas txheej txheej yog qhov tseem ceeb heev.
2.Dab tsi yog qhov sib txawv ntawm kev txiav thiab txiav kev tiv thaiv ntawm galvanized coils thiab aluminium -zinc coated coils?
Galvanized Coil (GI):
Tom qab txiav, qhov raug steel substrate raug nthuav tawm. Zinc ua raws li ib tug sacrificial anode, nyiam corroding los ntawm electrochemical kev txiav txim los tiv thaiv cov hlau substrate ntawm txiav los ntawm rusting. Qhov kev tiv thaiv no kav ntev mus txog rau thaum cov zinc nyob ib puag ncig yog depleted. Cov "zinc dross" ua rau ntawm qhov txiav kuj tseem yooj yim los ntxuav.
Aluminium-zinc coated coils (GL):
Tom qab txiav, qhov teeb meem yuav nyuaj dua. Aluminium thiab zinc nyob rau hauv txheej tsim ib qho hluav taws xob ob peb nrog cov hlau substrate. Txawm li cas los xij, vim tias txhuas muaj cov hluav taws xob zoo dua li zinc, nws qhov kev txaus siab rau "kev txi" corrosion tsis muaj zog li cov zinc ntshiab. Yog li ntawd, kev tiv thaiv ntawm qhov txiav yog qhov tsis muaj zog, thiab xeb liab tuaj yeem tshwm sim sai dua. Cov khoom siv corrosion (feem ntau yog sib xyaw ntawm cov xim dawb thiab xim liab) kuj pom ntau dua ntawm cov npoo txiav.
3.Dab tsi yog qhov txawv ntawm weldability ntawm galvanized coils thiab aluminium-zinc coated coils?
Galvanized kauj (GI):
Nws weldability kuj zoo. Thaum qhov chaw vuam, yuav tsum muaj qhov tam sim no siab dua me ntsis dua li thaum vuam zoo tib yam txias- cov nplooj ntawv hlau vim zinc muaj qhov taw tes qis thiab yuav yaj ua ntej, kis kab mob ntawm cov electrode thiab shortening electrode lub neej. Txawm li cas los xij, los ntawm kev kho qhov tsis zoo thiab siv cov electrodes tshwj xeeb, qhov ruaj khov weld zoo tuaj yeem tau txais.
Aluminium-zinc coated coils (GL):
Weldability tsis zoo. Muaj ob lub laj thawj tseem ceeb:
Kev ua haujlwm siab: Aluminium muaj cov khoom siv hluav taws xob zoo, ua rau muaj qhov tsis zoo ntawm cov txheej txheem, yuav tsum muaj qhov loj dua tam sim no los ua kom muaj cua sov txaus.
Alumina teeb meem: Aluminium yooj yim tsim ib qho nyuaj, siab -melting- taw tes alumina zaj duab xis ntawm nws qhov chaw. Cov yeeb yaj kiab no tsis yog -kev coj ua thiab tsis tuaj yeem, cuam tshuam loj heev tam sim no, ua rau tsis muaj zog welds, tawg, thiab nrawm nrawm electrode hnav thiab corrosion. Qhov no feem ntau yuav tsum tau siv cov electrodes tshwj xeeb kim heev (xws li dispersion- ntxiv dag zog rau tooj liab) thiab kev tswj cov txheej txheem nruj, thiab qhov vuam zoo tsis sib haum. Yog li ntawd, aluminium-zinc coated los xij feem ntau tsis pom zoo rau cov khoom siv uas xav tau ntau- taw tes vuam.
4.Yuav ua li cas cov coatings ua raws li galvanized coils thiab aluminium-zinc coated coils?
Galvanized kauj (GI):
Nws yog ib qho zoo tshaj plaws substrates rau xim txheej (xim steel ntawv). Nws nto yog ib yam thiab reacts zoo nrog tshuaj pretreatment agents (xws li phosphating kev daws teeb meem thiab passivation kev daws teeb meem), ua ib tug ntom conversion zaj duab xis uas muab zoo heev adhesion rau cov xim tom ntej.
Aluminium-zinc coated coil (GL):
Qhov saum npoo muaj txhuas- thaj chaw nplua nuj. Cov cheeb tsam no muaj cov tshuaj tsis zoo nrog cov tshuaj pretreatment, uas tuaj yeem ua rau cov yeeb yaj kiab hloov pauv tsis sib xws, yog li cuam tshuam rau txheej adhesion. Cov txheej txheem nruj dua lossis tshwj xeeb pretreatment feem ntau yuav tsum tau ua kom ntseeg tau tias adhesion zoo. Txawm hais tias cov cuab yeej siv niaj hnub tuaj yeem daws qhov teeb meem no, cov kev xav tau siab dua tseem nyob rau kev tswj cov txheej txheem.
5.Yuav ua li cas xaiv raws li qhov sib txawv scenarios?
Xaiv galvanized coil (GI) thaum: Koj qhov kev ua haujlwm suav nrog ntau qhov nyiaj stamping, kos duab sib sib zog nqus, thiab vuam, thiab koj muaj qhov xav tau siab heev rau txheej adhesion.
Xaiv aluminium-zinc coated coil (GL) thaum: Koj cov khoom feem ntau xav tau kev tiv thaiv corrosion siab heev thiab qee qhov kev ua haujlwm kub, thiab cov txheej txheem ua haujlwm feem ntau koom nrog kev yooj yim shearing thiab dabtsi yog khoov, uas yuav luag tsis muaj vuam cuam tshuam.