Dab tsi yog cov txheej txheem kub-dip coatings?
Muaj ntau ntau hom kub-dip txheej rau steel daim hlau thiab strips. Kev faib tawm cov cai hla cov qauv tseem ceeb - suav nrog Asmeskas, Nyij Pooj, European, thiab Suav cov qauv hauv tebchaws - zoo ib yam. Peb yuav tshuaj xyuas siv European tus qauv EN 10346: 2015 ua piv txwv.
Mainstream kub-dip coatings poob mus rau hauv 6 pawg loj:
- Kub-dip ntshiab zinc (Z)
- Kub-dip zinc-hlau alloy (ZF)
- Kub-dip zinc-aluminium (ZA)
- Kub-dip aluminium-zinc (AZ)
- Kub-dip aluminium-silicon (AS)
- Kub-dip zinc-magnesium (ZM)
Txhais thiab cov yam ntxwv ntawm ntau yam kub-dip txheej
Pre-kho steel strips yog immersed rau hauv ib da dej molten. Cov hlau molten sib txawv hauv chav da dej tso tawm cov txheej txheem sib txawv (tshwj tsis yog zinc-hlau alloy coatings).
Kev sib piv ntawm Kub-Dip Galvanizing thiab Electrogalvanizing
1. Galvanizing txheej txheem txheej txheem
Galvanizing yog hais txog cov txheej txheem kho saum npoo ntawm kev siv zinc txheej rau cov hlau, alloys, lossis lwm yam khoom siv rau kev zoo nkauj thiab tiv thaiv corrosion. Txoj kev siv dav tshaj plaws yog kub-dip galvanizing thiab txias galvanizing (electrogalvanizing).
2. Kub-Dip Galvanizing txheej txheem
Thawj txoj hauv kev rau galvanizing steel ntawv nto hnub no yog kub-dip galvanizing. Kub-dip galvanizing (tseem hu ua kub-dip zinc txheej lossis kub-dip galvanization) yog ib txoj hauv kev zoo ntawm kev tiv thaiv hlau corrosion, feem ntau yog siv rau cov khoom siv hlau hauv ntau qhov kev lag luam. Nws koom nrog kev sib xyaw cov hlau uas tshem tawm xeb rau hauv cov zinc molten ntawm kwv yees li 500 ° C, tso cov zinc txheej rau ntawm cov hlau kom ua tiav corrosion. Kub-dip galvanizing txheej txheem khiav: Cov khoom tiav acid ntxuav → dej yaug → Daim ntawv thov ntawm flux → ziab → dai rau txheej → Txias → tshuaj kho → Ntxuav → Polishing → Kub-dip galvanizing tiav.
3. Txias-dip Galvanizing txheej txheem
Txias galvanizing, tseem hu ua electrogalvanizing, siv cov khoom siv electrolytic. Tom qab degreasing thiab acid ntxuav, cov yeeb nkab fittings tau muab tso rau hauv ib qho kev daws teeb meem uas muaj zinc ntsev thiab txuas nrog rau qhov tsis zoo ntawm cov khoom siv electrolytic. Ib lub phaj zinc yog positioned opposite lub fittings thiab txuas nrog lub zoo davhlau ya nyob twg. Thaum siv fais fab, qhov taw qhia txav ntawm tam sim no los ntawm qhov zoo mus rau qhov tsis zoo ua rau zinc tso rau hauv cov khoom siv. Txias-galvanized yeeb nkab fittings undergo ua ua ntej galvanization.
Cov qauv kev ua raws li ASTM B695-2000 (US) thiab tub rog specification C-81562 rau mechanical galvanization.
Kev sib piv ntawm Kub-Dip Galvanizing vs. Cold-Dip Galvanizing
Kub-dip galvanizing muaj kev tiv thaiv corrosion ntau dua li txias-dip galvanizing (tseem hu ua electrogalvanizing). Electrogalvanized txheej feem ntau yog li ntawm 5 mus rau 15 μm hauv thickness, thaum kub-dip galvanized txheej feem ntau tshaj 35 μm thiab tuaj yeem ncav cuag 200 μm. Kub-dip galvanizing muab cov kev pabcuam zoo tshaj plaws nrog cov txheej tuab uas tsis muaj cov organic suav nrog. Electrogalvanizing siv zinc-filled coatings los tiv thaiv cov hlau los ntawm corrosion. Cov txheej txheem no yog siv rau qhov chaw tiv thaiv uas siv cov txheej txheem txheej txheej, ua ib txheej zinc puv tom qab ziab. Cov txheej qhuav qhuav muaj cov ntsiab lus zinc siab (txog 95%). Steel undergoes zinc plating ntawm nws qhov chaw nyob rau hauv txias txias, whereas kub-dip galvanizing yuav txheej steel kav nrog zinc los ntawm kub-dip immersion. Cov txheej txheem no yields tshwj xeeb tshaj yog muaj zog adhesion, ua rau cov txheej txheem heev resistant rau tev.
Yuav ua li cas paub qhov txawv kub-dip galvanizing los ntawm txias galvanizing?
1. Visual Identification
Kub-dip galvanized nto tshwm me ntsis rougher zuag qhia tag nrho, nthuav tawm cov txheej txheem-vim cov dej cim, drips, thiab nodules - tshwj xeeb tshaj yog pom ntawm ib qho kawg ntawm lub workpiece. Tag nrho cov tsos yog silvery-dawb.
Electrogalvanized (txias-galvanized) nto yog smoother, feem ntau daj-ntsuab nyob rau hauv cov xim, txawm iridescent, xiav-dawb, los yog dawb nrog ib tug ntsuab sheen kuj yuav tshwm sim. Cov chaw no feem ntau pom tsis muaj zinc nodules lossis clumping.
2. Distinguishing los ntawm txheej txheem
Kub-dip galvanizing muaj ntau cov kauj ruam: degreasing, acid pickling, tshuaj immersion, ziab, thiab thaum kawg immersion nyob rau hauv molten zinc rau ib lub sij hawm tshwj xeeb ua ntej tshem tawm. Cov txheej txheem no yog siv rau cov khoom xws li kub-dip galvanized kav.
Txias galvanizing, txawm li cas los xij, yog qhov tseem ceeb ntawm electrogalvanizing. Nws siv cov khoom siv electrolytic qhov twg lub workpiece undergoes degreasing thiab pickling ua ntej immersion nyob rau hauv ib tug zinc ntsev tov. Txuas mus rau lub tshuab electrolytic, lub workpiece tso ib txheej zinc los ntawm kev qhia txav ntawm tam sim no ntawm qhov zoo thiab tsis zoo electrodes.
Post lub sij hawm: Oct-01-2025
