Muaj ob hom nyias phaj zinc plating: kub plating thiab electroplating. Lub thickness ntawm kub galvanized zinc txheej yog feem ntau 60 ~ 300g / m2 (ib sab), uas yog siv rau cov khoom uas yuav tsum tau muaj zog corrosion kuj. galvanized zinc txheej yog 10 ~ 50g / m2 (ib sab), uas yog tsuas yog siv rau cov xim pleev xim los yog cov xim tsis muaj xim uas tsis muaj corrosion kuj.
Txoj kev kub plating yog muab faib ua flux method thiab shielding gas txo txoj kev raws li txoj kev pretreatment. Txoj kev flux yog khaws cov hlau phaj, tshem tawm cov oxides ntawm qhov chaw, 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 kub kub galvanizing ntawm sawb hlau.
Lub sawb hlau yog thawj zaug rhuab los ntawm nplaim taws nyob rau hauv lub qhov cub preheating kom hlawv tawm cov roj seem ntawm qhov chaw, thiab nyob rau tib lub sij hawm, ib tug hlau oxide zaj duab xis yog tsim rau ntawm qhov chaw; Tom qab ntawd nws yog rhuab mus rau 710 ~ 920 degree hauv qhov txo qhov cub tawg uas muaj H2 thiab N2 sib xyaw roj kom txo cov hlau oxide zaj duab xis rau hauv daim txhuam cev hlau. Tom qab qhov saum npoo tau ntxuav thiab ua kom cov hlua hlau yog txias rau qhov kub me ntsis siab dua li cov zinc molten, nws nkag mus rau hauv lub lauj kaub zinc ntawm 450 ~ 460 degree, thiab zinc txheej tuab yog tswj los ntawm kev siv riam phom cua. Thaum kawg, nws yog passivated los ntawm chromate tov los txhim kho dawb xeb kuj.
