1.Dab tsi yog lub hauv paus ntsiab lus ntawm xeb dawb thiab xeb liab?
Perfect Protection Mechanism: Cov txheej txheem galvanized tiv thaiv cov hlau substrate nyob rau hauv ob txoj kev:
Barrier Protection: A dense, intact zinc layer physically isolates the steel substrate from moisture and oxygen in the air.
Kev Tiv Thaiv Cathode: Thaum cov txheej galvanized raug kev puas tsuaj hauv cheeb tsam, zinc ua raws li kev txi anode, corroding nyiam tshaj cov hlau, yog li tiv thaiv cov hlau substrate.
Cov Khoom Siv Oxidation Ib txwm (Kev Pabcuam): Hauv huab cua qhuav, zinc reacts nrog oxygen los tsim ib zaj duab xis tuab heev thiab tawv zinc oxide (ZnO). Cov yeeb yaj kiab no ua haujlwm ruaj khov rau zinc nto, tiv thaiv oxidation ntxiv thiab muab kev ruaj ntseg thiab kev tiv thaiv.
Cov Khoom Ua Phem Oxidation (Qhov Teeb Meem): Thaum cov galvanized coils nyob rau hauv cov av ntub, qhov cua tsis zoo (tshwj xeeb tshaj yog thaum khaws cia lossis kev thauj mus los), cov yeeb yaj kiab dej condenses rau saum npoo. Zinc reacts nrog dej thiab carbon dioxide nyob rau hauv cov huab cua los ua ib tug xoob, ntxeem tau, thiab nkig dawb corrosion khoom, feem ntau yog tsim los ntawm zinc carbonate Zn₅(CO₃)₂(OH)₆, feem ntau hu ua "dawb xeb."
2.Vim li cas cov xeb dawb ua rau txo qis hauv kev tiv thaiv corrosion?
Barrier Degradation:
Ib qho zoo tshaj plaws zinc oxide zaj duab xis yog qhov thaiv ntom ntom, thaum cov xeb dawb yog xoob thiab ntxeem tau. Cov txheej xeb dawb no tsis tuaj yeem cais cov dej noo thiab cov pa oxygen, uas tuaj yeem nkag mus rau hauv cov txheej xeb yooj yim thiab txuas ntxiv ua rau cov zinc hauv qab.
Qhov no txhais tau hais tias corrosion yuav mus ntxiv, thiab zinc txheej yuav tas li noj.
Poob Kev Tiv Thaiv Cathodic:
Lub peev xwm tiv thaiv cathodic ntawm zinc plating txheej nyob ntawm nws qhov tuab. Kev tsim cov xeb dawb yog txheej txheem ntawm zinc txheej noj.
Dawb xeb nws tus kheej tsis ua hauj lwm raws li ib tug sacrificial anode. Raws li zinc txheej thins vim yog xeb dawb, nws tag nrho corrosion tiv thaiv lub neej (tshwj xeeb tshaj yog lub peev xwm tiv thaiv cathodic ntawm khawb) yuav luv luv.
3.Dab tsi txiav txim siab qhov cuam tshuam?
Qhov hnyav ntawm White Rust:
Cov xim dawb me ntsis: Tsuas yog me me ntawm cov hmoov dawb ntawm qhov chaw, uas tuaj yeem so ntawm tes los yog ntaub; lub hauv paus zinc txheej tseem zoo li qub. Tsawg heev cuam tshuam rau corrosion kuj.
Nruab Nrab Dawb Rust: Qhov saum npoo yog npog nrog ib txheej tuab ntawm cov dawb deposits. Tom qab ntxuav, cov zinc txheej zoo li npub thiab ntxhib, qhia txog kev puas tsuaj loj.
Severe White Rust: Dawb deposits accumulates. Tom qab ntxuav, pits tshwm rau ntawm zinc txheej saum npoo, thiab hauv qee qhov chaw, zinc txheej yog tag nrho corroded, nthuav tawm cov hlau substrate thiab nrog cov xeb liab. Corrosion tsis kam yog txo qis, txawm tias ua rau tsis ua haujlwm.
Tom qab siv ib puag ncig:
Yog tias galvanized coils nrog xeb dawb tom qab siv rau hauv qhov chaw hnyav (xws li cov av noo siab, cov cua hauv tsev, lossis thaj chaw ntug hiav txwv), kev xeb yuav nrawm los ntawm cov cheeb tsam xeb, txo qis kev ua neej.
Yog tias siv nyob rau hauv qhov chaw qhuav hauv tsev, qhov cuam tshuam ntawm cov xeb dawb me ntsis yog qhov me me.
4.Yuav tiv thaiv li cas?
Cia: Khaws cov galvanized coils nyob rau hauv qhuav, zoo -ventilated nyob rau hauv tsev warehouse, tsis txhob sib cuag ncaj qha nrog raug steel qhov chaw (uas yuav ua tau condensation).
Kev Thauj Mus Los: Ua kom muaj kev tiv thaiv nag thiab noo noo txaus thaum lub sijhawm thauj mus los.
Stacking: Sib cais coils nrog cov ntoo thaiv kom ntseeg tau tias huab cua ncig thiab tiv thaiv "tawg corrosion".
5.Yuav ua li cas daws qhov no?
Cov xeb dawb me ntsis: tuaj yeem ntxuav nrog cov tawv tawv- txhuam txhuam thiab daim ntaub huv. Rau kev thov ntau dua, nws tuaj yeem ua rau nruab nrab nrog cov kua qaub tsis muaj zog (xws li 5% acetic acid), tom qab ntawd yaug nrog dej thiab kom qhuav. Tom qab ntawd, feem ntau ntawm nws cov khoom tiv thaiv -corrosion yuav raug khaws cia.
Qhov nruab nrab rau cov xeb dawb loj heev: Yuav tsum tau kho cov khoom siv nrog txhuam txhuam, txhuam txhuam, lossis cov ntawv xuab zeb zoo kom txog thaum cov zinc txheej tsis zoo. Tom qab ntxuav, nws raug nquahu kom siv zinc- cov xim nplua nuj rau thaj chaw puas tsuaj los kho nws cov peev xwm tiv thaiv - corrosion.
Liab xeb tau tsim: Qhia tias cov zinc plating hauv zos tau ua tsis tiav. Cov xeb yuav tsum tau muab ntxuav kom huv si, tom qab ntawd yuav tsum tau siv cov xeb- tiv thaiv primer thiab zinc- cov xim nplua nuj.