Hauv tsev ua kub-dip galvanized steel ntawv yog dav siv hauv kev tsim kho, tsheb, thiab khoom siv hauv tsev rau kev tiv thaiv corrosion. Lawv cov kev tiv thaiv- xeb kev ua haujlwm feem ntau yog txiav txim siab los ntawm cov tuab ntawm zinc txheej. Raws li lub teb chaws tus qauvGB/T 2518-2019 "Nruam kub-dip zinc thiab zinc alloy coated steel ntawv thiab sawb", txheej txheej yog tsim los ntawm "Z" ua raws li tus lej, qhia tag nrho cov txheej txheej ntawm ob sab hauv g / m². Cov npe sib txawv ntawm Z60 txog Z275. Muaj ob txoj kev tsim khoom tseem ceeb: kub-dip galvanizing (thicker txheej, 60-300 g / m² ib sab, muaj zog adhesion) thiab electro-galvanizing (thinner txheej, 10-50 g / m² ib sab, zoo ib yam).
Txawv zinc txheej thicknesses muab sib txawv qib ntawm corrosion kuj. Cov lus hauv qab no qhia txog cov txheej txheej loj, ib qho - sab tuab, thiab cov ntawv thov pom zoo rau txhua qhov kev xaiv:
| Lub npe | Tag nrho ob qho - sab txheej txheej (g / m²) | Ib -sab thickness (μm) | Corrosion kuj thiab pom zoo ib puag ncig |
|---|---|---|---|
| Z60 | Ntau tshaj los yog sib npaug rau 60 | ≈4.2 | General sab hauv tsev (qhuav, tsis yog{0}}corrosive); xws li lub teeb steel framing, hluav taws xob txee - tsis haum rau siv sab nraum zoov. |
| Z80 | Ntau dua lossis sib npaug li 80 | ≈5.6 | Qhuav sab hauv tsev lossis luv luv -lub sij hawm sab nraum zoov; xws li sab hauv phab ntsa panels, qhov cua ducts. |
| Z100 | Ntau dua los yog sib npaug rau 100 | ≈7.0 | Sab nraum zoov dav dav (tsis yog- ntug hiav txwv dej, tsis yog- hnyav hnyav); xav tau kev pab lub neej ~ 10 xyoo; xws li billboards, guardrails. |
| Z120 | Ntau dua los yog sib npaug rau 120 | ≈8.4 | Sab nraum zoov corrosive ib puag ncig (coastal lossis industrial cua); zoo dua Z100. |
| Z140 | Ntau dua lossis sib npaug li 140 | ≈9.8 | Nruab nrab corrosion (suburban, chemical Rhiav); Lub neej 30-50% ntev dua Z100. |
| Z180 | Ntau dua lossis sib npaug li 180 | ≈12.6 | High corrosion (coastal tidal zones, heavy industrial areas, acid rain); expected life >20 xyoo. |
| Z220 | Ntau tshaj los yog sib npaug rau 220 | ≈15.4 | Corrosion hnyav (siab ntsev tsuag cov ntug dej hiav txwv, cov qauv sab nrauv, kev sib cuag tshuaj). |
| Z275 | Ntau dua lossis sib npaug li 275 | ≈19.2 | Extreme corrosion, design life >25 xyoo; xws li txoj kev loj teeb meem, hnub ci racking, khoom siv chaw nres nkoj. |
Lus Cim: Thickness suav nrog zinc ntom 7.14 g / cm³. Kub- txheej txheem dip ua tiav cov txiaj ntsig saum toj no; electro-galvanizing feem ntau muab tsawg dua los yog sib npaug rau 7 μm ib sab (rau Z100 thiab hauv qab).
Cov ntsiab lus ntawm corrosion kuj: Z60–Z80 are limited to indoor or short-term outdoor use; Z100–Z140 are common cost-effective outdoor choices; Z180 and above are suitable for critical components with design life >20 xyoo los yog C5 corrosive ib puag ncig. Rau cov xwm txheej hnyav heev (cov Islands tuaj, cov nroj tsuag tshuaj), aluminized zinc (xws li AZ150) lossis zinc-aluminium-magnesium coatings raug pom zoo, muab 2 mus rau 6 npaug ntawm corrosion kuj ntawm cov pa galvanized txheej.
Galvanized + hmoov coated khib nyiab ntim los ntawm peb lub tuam txhab, PG&GP, yog tsim los siv kub-dip galvanized steel los xij. Tom qab tsim, lawv tau txais cov hmoov txheej kawg, tsim kom muaj kev tiv thaiv zoo - xeb thiab tiv thaiv - xeb thaiv. Qhov kev tiv thaiv ob txheej no zoo tiv thaiv corrosion thiab xeb los ntawm sab nraum zoov raug cua, nag, thiab tshav ntuj.
