1.Zoo li cas ruaj khov?
Zinc yog cov hlau ruaj khov. Lub zog ultraviolet nyob rau hauv tshav ntuj tsis txaus los rhuav tshem zinc cov molecular chains lossis ua rau kev laus sai. Qhov no yog qhov sib txawv ntawm cov organic coatings (xws li cov xim thiab cov yas), uas tuaj yeem degrade thiab pulverize nyob rau hauv UV raug.
2.Dab tsi yog cov khoom siv corrosion ntawm zinc?
Thaum UV rays lawv tus kheej tsis ua mob rau zinc, nyob rau hauv ib puag ncig ntuj (tshwj xeeb tshaj yog nyob rau hauv lub xub ntiag ntawm noo noo, oxygen, thiab carbon dioxide), zinc reacts nrog cov ntsiab lus, maj mam tsim ib tug ntom, feem ntau tawm -dawb, tiv thaiv "zinc ntsev" zaj duab xis (feem ntau yog tsim los ntawm zinc carbonate, Zn₅(CO₃)₂() ntawm nws nto.
Cov txheej txheem no yog ib feem ntawm zinc qhov qub "weathering." Zinc ntsev zaj duab xis no yeej tiv thaiv ntxiv corrosion ntawm zinc nyob rau hauv, ua raws li ib tug tiv thaiv barrier.
Ultraviolet rays (raws li ib feem ntawm ib puag ncig yam tseem ceeb) ua kom cov txheej txheem huab cua no, tab sis qhov no tsis yog qhov tshwm sim ncaj qha ntawm UV puas; es, nws txhawb cov tshuaj tiv thaiv ntawm qhov chaw.
3.Dab tsi yuav tshwm sim nyob rau hauv cov tsos ntawm galvanized coils tom qab lub sij hawm ntev - raug sab nraum?
Cov txheej txheem tshiab galvanized nthuav tawm lub ci ci, xim hlau nyiaj -dawb luster (rau du, me me -spangle lossis tsis- cov khoom spangled) lossis cov yam ntxwv zinc-spangle siv lead ua qauv (rau cov khoom loj-spangled).
Qhov tshwm sim thawj zaug (lub lis piam mus rau hli): Qhov saum npoo maj mam darkens, poob nws cov xim hlau, thiab tig greyish -dawb.
Ntev -ntev raug (ntau xyoo): Ib qho zoo li, ntom, greyish-dawb lossis tsaus grey zinc ntsev txheej txheej tiv thaiv rau ntawm qhov chaw, ua rau lub ntsej muag du.
4.Piv nrog cov xim -coated galvanized kauj, UV tiv thaiv ntawm galvanized kauj yog li cas?
Hauv kev xyaum, ntau daim ntawv thov sab nraum zoov (xws li nthuav qhia lockers, ru tsev, thiab sab nrauv phab ntsa) siv cov xim -coated galvanized steel coils, uas yog coated nrog cov organic txheej (xim xim, polyester, PVDF, thiab lwm yam) hla lub galvanized steel kauj.
Nyob rau hauv cov ntaub ntawv no, lub luag hauj lwm tseem ceeb rau UV tsis kam ntog rau ntawm txheej xim txheej:
Kev ua haujlwm ntawm lub hauv paus galvanized: Muab kev tiv thaiv corrosion (xeb) rau cov khoom siv hauv paus, tseem hu ua "puag xeb tiv thaiv."
Lub luag haujlwm ntawm cov xim txheej:
Muab cov xim zoo nkauj txaus nyiam thiab muaj kev cuam tshuam lub cev ntxiv.
Direct raug rau UV hluav taws xob. High- xim zoo- cov ntawv hlau coated siv cov huab cua zoo heev -cov tsho tiv no tiv taus (xws li siab-huv polyester, HDP, PVDF, thiab lwm yam). Cov topcoats no muaj UV absorbers thiab stabilizers los tiv thaiv UV degradation thiab tiv thaiv chalking, gloss poob, thiab discoloration ntawm txheej.
5.Nyob rau hauv cov ntsiab lus, qhov txawv ntawm anti-ultraviolet nyhuv ntawm liab qab galvanized kauj thiab xim-coated galvanized kauj yog dab tsi?
Bare galvanized kauj: Tsis tshua muaj resistant rau UV rays. UV rays tsis ncaj qha rau nws, tab sis lawv txhawb nqa huab cua ib txwm nyob rau saum npoo, tsim cov zinc ntsev tiv thaiv uas ua rau lub ntsej muag hloov ntawm ci nyiaj mus rau -dawb. Qhov no tsis cuam tshuam rau nws cov tub ntxhais kev tiv thaiv corrosion.
Ua ntej-coated galvanized kauj: Nws UV kuj nyob ntawm qhov zoo ntawm cov txheej txheem ua ntej-coated. Cov txheej txheej galvanized feem ntau tiv thaiv lub substrate los ntawm xeb, kom ntseeg tau tias txawm me ntsis kev puas tsuaj rau txheej tiv thaiv rusting sai.