Muaj cov paj zoo nkauj zinc yog qhov tseem ceeb ntawm cov tsoos kub-dip galvanizing thiab cov ntawv hlau. Daim ntawv ua tiav ntawm zinc crystals zoo ib yam li cov hnub qub snowflakes los yog hexagonal hnub qub, yog li zinc crystals tau los ntawm condensation ntawm qhov kub-dip strip steel feem ntau yuav tsim cov snowflakes los yog hexagonal hnub qub zoo li zinc paj.
High purity zinc kua tsis tuaj yeem khov thiab tsim cov paj zinc thaum lub caij txias vim tias nws tsis muaj qhov tsim nyog siv lead ua nuclei. Yuav kom tau txais cov paj zinc zoo, qhov yuav tsum tau ua ua ntej yog ntxiv ob hom hlau alloy nrog cov khoom sib txawv hauv qhov tsim nyog rau cov tshuaj zinc. Ib hom hlau alloy yog soluble tag nrho hauv cov tshuaj zinc tab sis yuav luag tag insoluble hauv cov khoom zinc, xws li txhuas thiab titanium; Lwm hom alloying caij muaj qee yam solubility nyob rau hauv cov kua thiab cov khoom zinc, xws li txhuas, tin, antimony, thiab lwm yam. Yog hais tias tsuas yog ib yam ntawm cov khoom alloying ntxiv, tab sis lub xeev saum npoo ntawm zinc txheej yuav hloov tom qab solidification, nws tsis txaus los tsim cov zinc paj.
Txoj kev ntawm kev tsim zinc paj
Cov txheej txheem ntawm kev tsim cov paj zinc yog sim ua kom muaj ntau tus siv lead ua nuclei thaum ntxov, txo cov khoom kub ntawm zinc tov, thiab ncua sij hawm kev loj hlob ntawm zinc paj muaju, uas pab txhawb kev loj hlob ntawm zinc paj.
(1). Ntxiv lwm cov ntsiab lus rau zinc yoj
Thaum muaj qee yam alloying tau ntxiv rau cov tshuaj zinc, nws cov txheej txheem crystallization tuaj yeem ua tau ntev, thiab cov tshuaj zinc saum npoo yuav tsis khov kom txog thaum nws ncav cuag nws qhov kub thiab txias + .
Ntshiab zinc solidifies ntawm 419.5 degree C. Yog hais tias tin (tsawg dua 0.5%) ntxiv, tin zinc eutectoid alloy yuav tsis solidify ua ntej nws mus txog 198 degree C. Yog hais tias cadmium ntxiv, cadmium zinc eutectoid alloy. yuav tsis khov ua ntej nws nce mus txog 264 degree C. Yog hais tias antimony (hauv qab no 0.3%) ntxiv, antimony zinc eutectoid alloy yuav tsis solidify kom txog thaum nws ncav cuag 409 degree . Tom qab ntxiv cov hmoov lead, cov hlau lead zinc eutectic alloy yuav tsis khov kom txog thaum nws ncav cuag 317 degree.
Yog li ntawd, ntxiv cov alloys kom txo qhov melting point ntawm zinc kua yuav ncua lub sij hawm solidification rau txawv degrees piv rau cov zinc ntshiab, zoo heev ncua sij hawm loj hlob ntawm zinc paj muaju thiab pab txhawb kev loj hlob ntawm zinc paj. Yog li ntawd, cov paj zinc loj tuaj yeem tau txais.
(2). Nto tshuab cua tshuab
Thaum zinc txheej txheej saum npoo yuav ua kom khov, yog tias chav dej lossis sulfur dioxide ntws los ntawm nws qhov chaw kom cov zinc paj crystals kom loj hlob zoo, cov qauv loj tuaj yeem tau txais. Lwm lub hom phiaj ntawm tshuab sulfur dioxide roj yog tsim cov oxide zaj duab xis tuab thiab txhim kho corrosion kuj ntawm galvanized txheej.
(3). Hlau mesh txoj kev
Txoj kev no tsuas yog siv rau ntawm cov ntawv nyias nyias, uas yog ua tiav los ntawm kev siv cov hlau nplaum sib nqus kom coj cov hlau xaim mesh rau hauv kev sib cuag nrog cov txheej txheej zinc. Vim qhov txias txias ntawm qhov chaw sib cuag ntawm cov hlau hlau mesh cov pob qij txha, cov khoom ntawm crystallization yog thawj zaug ntawm qhov taw tes no, tsim cov siv lead ua nuclei. Cov kua zinc uas tsis muaj zog ntxiv pib crystallize thiab nthuav tawm sab nraud, tsim cov paj zinc.
(4). Txau Mist method
Txau dej pos huab (ib qho sib xyaw ntawm cov dej thiab chav dej lossis dej thiab cua) rau ntawm qhov chaw ntawm cov hlau galvanized ua ntej cov kua ntshiab zinc solidifies, ua rau siv lead ua nuclei. Cov kua zinc uas tsis tau kho yog pib los ntawm qhov no thiab nthuav tawm sab nraud los ua cov paj zinc.
(5). Lwm txoj kev
Ntxiv nrog rau cov txheej txheem saum toj no, yog tias lub npoo ntawm cov plated tuaj yeem ua tau du, txheej txheej galvanized tuaj yeem nyias nyias, qhov ntsuas kub tuaj yeem tswj tau kom txo qis sib npaug, thiab muaj lub sijhawm cua txias txaus, lub paj zinc loj tuaj yeem ua tau. tau.
