Galvanized
Zinc coated ntawv uas txuas lub neej ntawm cov khoom thiab pab tiv thaiv corrosion.Nrog rau kev xav txog kev kub ntxhov ntau dua thiab zoo nkauj zoo nkauj, nws yog qhov zoo tagnrho rau kev tsim kho vaj tse, silos, barns, thiab lwm yam kev siv.pab kom muaj kev cuam tshuam txog cov cua sov.
Galvanized ntawv
Rectangular corrugated galvanized ntawv nrog siab tiv thaiv corrosion, zoo tagnrho rau kev tsim kho lub ru tsev thiab kev lag luam facades.Nrog rau lub neej ntev muaj txiaj ntsig, nws tiv taus cov huab cua puag ncig thiab
Galvanizing yog ib qho kev lag luam thiab siv tau zoo los tiv thaiv kev xeb ntawm cov hlau, thiab cov tuab ntawm cov hlau galvanized feem ntau yog 0.35 txog 3 hli.Lus Askiv "galvanizing" txhais tau hais tias txheej txheej galvanized tuaj yeem tiv thaiv cov hlau phaj electrochemically.Xyoo 1742, Fabkis Meloman (Melomin) tau kawm tiav txoj kev kub-dip galvanizing.Xyoo 1836, Fabkis Sorel (Sorel) tau siv cov txheej txheem kub-dip galvanizing rau kev tsim khoom.Xyoo 1837, HW Grawford tau txais patent rau kub-dip galvanizing los ntawm txoj kev flux.Xyoo 1935, American Sendzimir (T. Sendzimir) tau thov kom siv cov roj tiv thaiv kev txo qis rau kev nruam kub-dip galvanizing ntawm sawb hlau, feem ntau hu ua "Sendzimir method".Xyoo 1937, thawj Sendzimir txuas ntxiv kub-dip galvanizing kab tau tsim hauv Tebchaws Meskas.Tuam Tshoj pib tsim cov ntawv kub-dip galvanized hauv Anshan xyoo 1940s, thiab xyoo 1979, thawj zaug kub-dip galvanizing kab rau sawb hlau tau tsim hauv Wuhan.
Kub dip
Muaj ob hom kub-dip galvanizing txoj kev thiab electroplating txoj kev.Lub thickness ntawm kub-dip zinc txheej feem ntau yog 60 ~ 300g / m2 (ib sab), uas yog siv rau qhov chaw uas yuav tsum tau muaj zog corrosion kuj.Electroplated zinc txheej yog 10-50g / m2 (ib sab), uas feem ntau yog siv rau cov xim pleev xim lossis cov xim tsis muaj xim uas tsis tas yuav muaj kev tiv thaiv corrosion.Txoj kev kub-dip yog muab faib rau hauv txoj kev flux thiab kev tiv thaiv roj txo txoj kev raws li txoj kev ua ntej.Cov txheej txheem flux yog txhawm rau txhawm rau txhawm rau txhawm rau tshem tawm cov oxides ntawm qhov chaw, tom qab ntawd dhau los ntawm lub tank flux uas muaj ZnCl2 thiab NH4Cl, thiab tom qab ntawd nkag mus rau hauv lub tank zinc molten rau galvanizing.Txoj kev tiv thaiv roj txo yog dav siv rau kev kub-dip galvanizing ntawm sawb hlau.Lub sawb hlau ua ntej dhau los ntawm cov nplaim hluav taws kub preheating rau qhov cub kom hlawv cov roj seem ntawm qhov chaw, thiab tib lub sijhawm, cov hlau oxide zaj duab xis yog tsim rau ntawm qhov chaw;Daim txhuam cev Hlau.Tom qab cov sawb hlau uas nws saum npoo tau huv si thiab qhib kom txias rau qhov kub me ntsis siab dua li cov zinc molten, nws nkag mus rau hauv lub lauj kaub zinc ntawm 450-460 ° C, thiab siv rab riam cua los tswj lub thickness ntawm zinc txheej.Thaum kawg, nws yog passivated nrog cov tshuaj chromate los txhim kho cov xeb dawb.
Electroplating
Raws li cov txheej txheem plating siv, nws tuaj yeem muab faib ua alkaline method thiab acid method.Cov tshuaj alkaline plating muaj tus nqi siab, ua qias tuaj ib puag ncig, kev ua haujlwm tsis zoo, thiab txheej txheej tsis zoo, yog li nws tsis siv.Cov khoom tseem ceeb ntawm cov kua qaub plating yog ZnSO4 · 7H2O, NH4Cl thiab Al2 (SO4) 3 · 18H2O, thiab lwm yam. Nrog cov zinc ntshiab li cov anode thiab sawb hlau raws li cathode, nyob rau hauv qhov kev txiav txim ntawm tam sim no, zinc anode phaj yog yaj. rau hauv Zn2+ rau hauv cov tshuaj plating, thiab Zn2+ raug txo kom nws yog xim hlau zinc ntawm lub cathode thiab tso rau saum npoo ntawm cov sawb hlau.Cov txheej txheej yog kho nrog cov tshuaj sib xyaw ntawm phosphate thiab chromate, uas tuaj yeem txhim kho cov xim pleev xim, thiab qhov chaw ntawm cov ntawv hlau electro-galvanized yog ci thiab du, uas yog siv hauv kev lag luam tsheb yav dhau los.Nyob rau hauv xyoo tas los no, cov peev txheej ntawm daim ntawv thov tau nthuav dav rau kev lag luam hluav taws xob thiab lwm yam, uas tau txhawb txoj kev loj hlob ntawm kev lag luam electro-galvanized sheet.Nyob rau xyoo 1970, cov nplooj ntawv ib sab galvanized kuj tau tsim.
Lub sij hawm xa tuaj: Mar-10-2022
