Hais txog yuav ua li cas dipped galvanized steel yeeb nkab, cov txheej txheem ntawm kub-dip galvanizing tshwm sim nyob rau hauv ib tug metallurgical daim ntawv cog lus ntawm zinc thiab hlau nrog ib tug series ntawm txawv hlau-zinc alloys. Ib tug raug kub-dip galvanizing kab ua haujlwm raws li hauv qab no:
1. Cov hlau yog ntxuav siv cov tshuaj caustic. Qhov no tshem tawm cov roj / roj, av, thiab xim.
2. Cov tshuaj ntxuav caustic yog yaug tawm.
3. Cov hlau yog pickled hauv cov kua qaub kom tshem tawm cov nplai zeb.
4. Cov tshuaj pickling yog rinsed.
5. Ib qho flux, feem ntau zinc ammonium chloride yog siv rau cov hlau los tiv thaiv oxidation ntawm qhov chaw ntxuav thaum raug huab cua. Lub flux yog tso cai rau qhuav ntawm cov hlau thiab pab nyob rau hauv tus txheej txheem ntawm cov kua zinc wetting thiab adhering rau cov hlau.
6. Cov hlau yog dipped rau hauv molten zinc da dej thiab tuav nyob rau ntawd kom txog rau thaum qhov kub ntawm cov hlau sib npaug nrog cov da dej.
7. Cov hlau yog txias rau hauv lub tank quench kom txo nws qhov kub thiab inhibit qhov kev xav tsis zoo ntawm cov txheej txheem tshiab nrog cov cua.
Technically, galvanization yog txheej txheem ntawm txheej hlau thiab hlau nrog ib txheej ntawm zinc los ntawm immersing cov hlau nyob rau hauv ib da dej ntawm molten zinc ntawm qhov kub ntawm ib ncig ntawm 840 ° F (449 ° C). Thaum raug rau cov huab cua, cov zinc ntshiab (Zn) reacts nrog oxygen (O2) los tsim zinc oxide (ZnO), uas ntxiv reacts nrog carbon dioxide (CO2) los ua zinc carbonate (ZnCO3), feem ntau dull grey, muaj zog heev. cov khoom siv uas tiv thaiv cov hlau hauv qab los ntawm kev xeb ntxiv hauv ntau qhov xwm txheej. Feem ntau, kub dipped galvanized yeeb nkab muaj cov yeeb nkab steel nqi siab dua li lwm cov yeeb nkab zoo tib yam siv vim nws cov nqi tsim khoom siab hauv khw.
Rau cov kev siv tswv yim, zoo li lwm yam kev tiv thaiv corrosion, galvanizing tsuas yog tiv thaiv cov khoom steel los ntawm kev ua ib qho kev thaiv ntawm cov yeeb nkab steel thiab cua. Txawm li cas los xij, zinc yog cov hlau electronegative ntau dua li cov hlau. Qhov no yog ib tug tshwj xeeb yam ntxwv rau galvanizing. Tshwj xeeb, thaum lub galvanized txheej yog puas thiab cov khoom hlau raug rau cov cua, zinc tuaj yeem tiv thaiv hlau los ntawm galvanic corrosion. Tsis tas li ntawd, yog tias txheej txheej no tshwm sim los yog khawb, zinc qhov kev tiv thaiv theem nrab raug hu los tiv thaiv cov hlau los ntawm kev ua galvanic. Nyob rau hauv ib lub zeb, zinc thickness yog tswj los ntawm tus nqi ntawm lub sij hawm ntawm txhua feem yog immersed nyob rau hauv lub molten zinc da dej raws li zoo raws li qhov ceev ntawm nws yog tshem tawm. Lo lus "ob chav dipping" yog hais txog qhov loj heev kom haum rau hauv galvanizing kettle thiab yuav tsum tau dipped ib kawg ntawm ib lub sij hawm. Nws tsis yog hais txog txheej txheej ntxiv. Raws li cov kws tshaj lij steel yeeb nkab chaw tsim khoom hauv Suav teb, peb tau cog lus los tsim ntau hom steel yeeb nkab rau koj cov haujlwm. Yog xav paub ntxiv, koj tuaj yeem tiv tauj peb txhua lub sijhawm.
Xa koj cov lus rau peb:
Post lub sij hawm: Jul-30-2018
