1.Vim li cas cov zinc txheej tawg thaum khoov?
Plasticity Differences nyob rau hauv cov hlau: Lub hauv paus hlau (feem ntau yog me me hlau) thiab zinc txheej yog ob yam hlau uas sib txawv ductility thiab yield zog. Zinc yog softer dua hlau, tab sis nws cov yas deformation muaj peev xwm muaj kev txwv.
Interface Bonding thiab Thickness: Thaum lub sij hawm khoov, lub hauv paus steel undergoes yas deformation. Lub zinc txheej ntawm sab nrauv yog yuam kom nruj, thaum lub zinc txheej ntawm sab hauv yog compressed. Thaum cov txheej txheem siv (nruj los yog compression) dhau ntawm zinc txheej ntawm qhov kev ua siab ntev, nws tawg kom txo tau qhov kev ntxhov siab.
2.Dab tsi yog qhov tseem ceeb cuam tshuam rau qib ntawm kev tawg ntawm zinc txheej?
Galvanizing txheej txheem: Kub-dip galvanizing: zinc txheej yog thicker (feem ntau 50-200μm los yog ntau tshaj), ua ib tug nkig hlau-zinc alloy txheej nrog lub substrate. Cov txheej no feem ntau cuam tshuam rau kev tawg thiab flaking thaum khoov.
- Electrogalvanizing: Cov txheej zinc yog thinner (feem ntau 5-20μm), ua rau cov qauv zoo dua qub thiab cov zinc ntshiab. Nws muaj kev khoov zoo dua li kub-dip galvanizing thiab tsis tshua muaj kev cuam tshuam loj heev.
Khoov vojvoog: Qhov me me ntawm lub vojvoog dabtsi yog khoov (piv txwv li, qhov khoov duav), qhov ntau dua qhov tensile thiab compressive strains ntawm zinc txheej, ua rau nws yooj yim rau kev tawg. Ua kom lub vojvoog dabtsi yog khoov yog txoj hauv kev zoo tshaj plaws los txo qhov tawg.
Zinc txheej thickness: Nyob rau hauv tib yam dabtsi yog khoov tej yam kev mob, lub thicker lub zinc txheej, qhov ntau dua qhov kev ntxhov siab nyob rau hauv nws yuav raug rau thiab ntau dua nws yog cracking. Rau qhov chaw uas yuav tsum tau khoov hnyav, cov khoom siv nrog qis "txheej hnyav" (piv txwv li, zinc txheej thinner) feem ntau yog xaiv.
3.Puas tawg ntawm cov zinc txheej txhais tau hais tias kev tiv thaiv kev tiv thaiv - corrosion tsis ua haujlwm?
Microcracks yog ib txwm: Thaum lub sij hawm nruj kev ntsuam xyuas, cov kab nrib pleb me me hauv zinc txheej, imperceptible rau qhov muag liab qab, raug tso cai. Tsuav cov kab nrib pleb no tsis nkag mus rau hauv cov hlau substrate thiab zinc txheej ntawm cov kab nrib pleb tseem tsis zoo, lawv tseem tiv thaiv cov hlau los ntawm lub hauv paus ntsiab lus ntawm kev tiv thaiv anodic.
Spalling yog qhov txaus ntshai: Yog tias khoov ua rau thaj chaw loj ntawm cov zinc txheej rau spilling, nthuav tawm thaj chaw loj ntawm cov hlau substrate, cov chaw no yuav tsis muaj kev tiv thaiv thiab yuav ua rau cov xeb xeb sai sai.
Sacrificial anodic tiv thaiv: Txawm hais tias ib qho me me ntawm cov hlau substrate raug nthuav tawm ntawm qhov chaw tawg, qhov chaw nyob ib puag ncig cov zinc txheej yuav nyiam corrode (saib nws tus kheej), yog li tiv thaiv cov hlau raug. Qhov kev tiv thaiv no yuav siv tau ntev npaum li cov kab nrib pleb tsis dav lossis ntom ntom.
4.Yuav tswj thiab ntsuas li cas?
Tsim Phase:
Xaiv cov ntawv galvanized tsim nyog raws li qib ntawm kev kho tau. Piv txwv li, electro- ntawv galvanized yog tsim nyog rau complex tsim qhov chaw.
Siv lub vojvoog khoov loj dua thaum tsim.
Kev tsim khoom thiab kev xaiv khoom:
Rau qhov uas yuav tsum tau khoov tau zoo, thov kub -dip galvanized ntawv nrog "zoo bendability" los ntawm koj tus neeg muag khoom; qhov no yuav optimize cov txheej txheem ntau lawm.
Xaiv ib lub ntsuas nrog ib txheej nyias.
Kev soj ntsuam zoo:
Cov qauv kev lag luam (xws li ASTM, ISO, thiab GB) feem ntau suav nrog cov kev sim khoov tshwj xeeb los ntsuas cov txheej txheej adhesion.
Ib txoj hauv kev yog khoov tus qauv 180 degrees nyob ib ncig ntawm lub axis ntawm ib txoj kab uas hla (xws li, 0a, lub ntsiab lus nruj nruj) thiab tshuaj xyuas cov txheej txheej rau zinc flaking (tsis yog micro- cracking). Kev lees paub yog feem ntau txiav txim siab los ntawm "tsis muaj flaking ntawm zinc txheej mus rau qhov chaw uas nws tuaj yeem raug tshem tawm nrog tus ntiv tes."
5.Hauv cov ntsiab lus, qhov cuam tshuam ntawm zinc txheej tawg tom qab khoov ntawm galvanized kauj yog dab tsi?
Cracking: Microcracks nyob rau hauv zinc txheej yog tshwm sim tom qab khoov galvanized coils, tshwj xeeb tshaj yog rau thicker kub -dip galvanized txheej.
Kev tswj hwm yog qhov tseem ceeb: Los ntawm kev xaiv cov khoom tsim nyog (kev ua haujlwm, zinc txheej tuab) thiab siv lub vojvoog khoov loj txaus, kev tawg tuaj yeem khaws cia hauv qhov kev txwv.
Microcracks tsis tas txhais tau tias tsis ua haujlwm: tsuav yog tsis muaj zinc txheej hnyav hnyav, microcracks feem ntau tsis tuaj yeem ua rau poob ntawm kev tiv thaiv corrosion, raws li kev tiv thaiv anodic tiv thaiv ntawm zinc tseem muaj nyob.