Thaum nws los txog rau kub dipped galvanized steel yeeb nkab, 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:
◆ Hlau yog ntxuav los ntawm cov tshuaj caustic. Qhov no tshem tawm cov roj / roj, av, thiab xim.
◆ Cov tshuaj ntxuav caustic yog yaug tawm.
◆ Cov hlau yog pickled hauv cov kua qaub kom tshem tawm cov nplai zeb.
◆ Cov kua txiv hmab txiv ntoo yog rinsed.
◆A 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.
◆ Cov hlau yog dipped rau hauv lub molten zinc da dej thiab tuav nyob ntawd kom txog rau thaum qhov kub ntawm cov hlau sib npaug nrog cov da dej.
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 hlau thiab cov 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, vim nws cov kav ntev thiab cov khoom tiv thaiv corrosive, feem ntau ntawm cov kav dej txias txias tuaj yeem rov siv dua thiab rov siv dua, uas rau qee qhov kev txuag nyiaj ntau thaum lub sijhawm ua haujlwm tom qab.
Nrog rau cov txheej txheem kev tiv thaiv, cov kav dej tuaj yeem siv rau sab nraum zoov, thiab tuaj yeem tiv taus kev puas tsuaj los ntawm qee qhov kev cuam tshuam ib puag ncig. Kev ntsuam xyuas thiab kev tshawb fawb tau qhia tias qhov nruab nrab lub neej expectancy rau galvanized steel siv raws li ib tug qauv qauv yog zoo tshaj 50 xyoo nyob rau hauv ib tug nyob deb nroog ib puag ncig thiab 20-25 xyoo los yog ntau tshaj nyob rau hauv ib tug huab nroog los yog ntug hiav txwv dej. Hauv qhov no, cov neeg cog lus tuaj yeem ntseeg siab siv cov khoom no hauv qhov project. 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: Sep-14-2018
