Xim -coated steel kauj yog cov khoom sib xyaw tsim los ntawm kev siv cov txheej txheem organic kom txias - cov ntawv yob los yog galvanized steel los ntawm cov txheej txheem txuas txuas txuas ntxiv.Nws muab cov khoom siv dag zog ntawm cov hlau nrog cov hniav thiab corrosion-cov khoom tiv thaiv ntawm cov txheej txheem. Nws yog dav siv hauv kev tsim kho, khoom siv hauv tsev, kev thauj mus los, thiab lwm yam kev lag luam, thiab yog cov khoom siv tseem ceeb hauv kev tsim khoom niaj hnub no.
I. Cov txheej txheem ntau lawm thiab cov yam ntxwv
Lub hauv paus ntawm cov xim -coated steel coil ntau lawm yog nyob rau hauv kev kho deg thiab txheej tshuab. Lub substrate feem ntau yog txias- dov steel (CRC) lossis galvanized steel (GI/EG). Tom qab degreasing thiab ntxuav, thiab tshuaj hloov txheej txheej kev kho mob (xws li chromate passivation los yog chromium-dawb passivation), cov primer thiab topcoat yog sib npaug ntawm cov rov qab los yog pem hauv ntej txheej. Cov ntaub ntawv txheej feem ntau suav nrog polyester (PE), silicone- hloov polyester (SMP), siab - polyester (HDP), thiab polyvinyl chloride (PVDF). PVDF coatings feem ntau yog siv rau hauv siab - daim ntaub ntawv siv tau ntev vim lawv cov kev tiv thaiv zoo heev rau UV rays thiab tshuaj lom neeg corrosion. Cov xim niaj hnub- txheej txheej ntau lawm siv siab- nrawm, ua haujlwm tsis tu ncua, tswj cov txheej tuab ntawm qhov ntau ntawm 5-25μm. High-temperature curing (200-250 degree) tsim ib txheej tiv thaiv ntom. Nws technical zoo muaj xws li:
1. Corrosion kuj: Cov txheej thaiv cov dej thiab cov pa oxygen nkag mus, ua kom lub neej ntev ntawm cov substrate;
2. Cov khoom siv kho kom zoo nkauj: Muaj kev xaiv dav ntawm cov xim thiab textures kom tau raws li tus kheej xav tau;
3. Processability: Nws txhawb cov txheej txheem theem nrab xws li shearing, dabtsi yog khoov, thiab stamping, hloov mus rau ntau yam kev tsim khoom.
II. Cov cheeb tsam tseem ceeb ntawm daim ntawv thov
(I) Kev Tsim Kho Kev Lag Luam
Xim -coated steel coils account rau ntau dua 60% ntawm kev tsim kho kev lag luam, feem ntau yog siv hauv vov tsev, phab ntsa vaj huam sib luag, thiab kab hlau rhuav phab ntsa. Piv txwv li, HDP-coated steel coils yog haum rau cov nroj tsuag muaj, thaum PVDF-coated steel coils feem ntau pom nyob rau hauv siab-kawg coj mus muag vaj tse, khaws lawv gloss thiab xim rau ntau tshaj 20 xyoo. Tsis tas li ntawd, ua ntej- xuas nrig xim-coated steel coils tuaj yeem siv ncaj qha rau kev tshem tawm lub qab nthab lossis lub tshuab ua pa, txhim kho kev tsim kho.
(II) Cov Khoom Siv Hauv Tsev
Sab nrauv ntawm cov khoom siv hauv tsev xws li lub tub yees thiab lub tshuab ntxhua khaub ncaws siv cov xim -coated steel coils, yuav tsum tau txheej txheej yuav tsum tau ntiv tes - thiab khawb - tiv taus. Kev txhawb nqa ntawm chromium-dawb, ib puag ncig tus phooj ywg txheej txheej thev naus laus zis txuas ntxiv nrog cov qauv tsim ntsuab hauv kev lag luam khoom siv hauv tsev.
(III) Kev thauj mus los
Hauv tsheb lub cev thiab lub thawv tsim khoom, xim -coated steel coils txo lub zog siv los ntawm kev tsim lub teeb, thaum cuam tshuam- cov coatings tiv thaiv tiv thaiv kev hnav thiab corrosion thaum thauj.
III. Kev lag luam kev loj hlob
Lub ntiaj teb xim -coated steel coil kev lag luam txuas ntxiv mus, nrog rau Asia -Pacific cheeb tsam dominating, thiab Tuam Tshoj ua tus tsim khoom loj tshaj plaws thiab cov neeg siv khoom. Cov lus qhia kev txhim kho yav tom ntej muaj xws li:
1. Ib puag ncig tus phooj ywg: Dej-raws li txheej thiab chromium- cov txheej txheem passivation pub dawb yog hloov cov tshuaj hnyav ib txwm siv-raws li cov khoom siv los txo VOC emissions;
2. Functionalization: Txhim kho cov txheej txheem tshwj xeeb xws li tus kheej- ntxuav, tshuaj tua kab mob, thiab cov txheej txheem txheej txheem, nthuav dav rau hauv lub zog tshiab thiab kev kho mob;
3. Lightweighting: Txo cov khoom siv los ntawm thinning lub substrate thiab optimizing txheej txheej.
Xaus
Raws li cov khoom lag luam sawv cev ntawm kev ua cov hlau, kev txhim kho thev naus laus zis thiab kev txhim kho kev lag luam ntawm cov xim -coated steel coils yog qhov tseem ceeb rau kev txhawb nqa kev tsim kho kom ruaj khov ntawm kev lag luam hauv qab. Nrog rau kev siv cov ntaub ntawv tshiab thiab cov txheej txheem, xim -coated steel coils yuav qhia lawv tus nqi hauv kev ua tau zoo dua thiab ntau yam kev siv, dhau los ua tus choj txuas cov ntaub ntawv yooj yim thiab siab -kev tsim khoom.
