1.Dab tsi yog primer ua si hauv pre-coated steel ntawv? Nws lub luag haujlwm tseem ceeb yog dab tsi?
Primer ua raws li tus choj ntawm sab saum toj thiab hauv qab txheej ntawm pre-coated steel ntawv. Nws muaj ob txoj haujlwm tseem ceeb:
Txhim khu adhesion, ua raws li cov txheej txheej "nplaum": Nws tuav lub substrate ruaj khov thiab muab lub hauv paus txhim khu kev qha rau lub tsho tiv no, tiv thaiv cov xim zaj duab xis los ntawm yooj yim detaching txawm tias tom qab noo noo nkag mus, yog li tiv thaiv blistering thiab tev tawm.
Kev txhim kho corrosion kuj, ua raws li "thib ob kab ntawm kev tiv thaiv": Cov tshuaj tiv thaiv - corrosion pigments muaj nyob rau hauv primer tuaj yeem ua rau cov hlau nto thaum lub txheej puas lawm, ua hauj lwm sib koom ua ke nrog cov txheej txheem galvanized kom txhim kho tag nrho corrosion kuj.
2.Dab tsi yog lub luag haujlwm ntawm primer ua si hauv "plaub-hauv-ib" los tiv thaiv-corrosion system rau pre-coated steel ntawv?
Kev tiv thaiv-corrosion nyhuv ntawm pre-coated steel los xij yog qhov tshwm sim ntawm kev sib koom ua ke ntawm "plaub-hauv-ib" system. Cov primer plays lub luag haujlwm tseem ceeb hauv nruab nrab thiab tseem ceeb, txuas cov txheej txheem pretreatment thiab topcoat. Nws ob lub luag haujlwm tseem ceeb- txhim kho adhesion thiab txhim kho kev tiv thaiv corrosion-txuas tag nrho cov kev tiv thaiv kev tiv thaiv-corrosion system rau hauv ib qho kev sib koom ua ke, tso cai rau txhua txheej ua haujlwm sib koom ua ke los tsim kev tiv thaiv tiav.
3.Qhov kev ua tau zoo ntawm primer txawv li cas ntawm topcoat thiab backcoat?
Piv rau topcoat thiab backcoat, primer prioritizes functionality tshaj qhov tsos. Nws tsis tsom rau cov xim vibrant lossis huab cua tsis kam; nws cov haujlwm tseem ceeb yog los xyuas kom meej adhesion thiab tiv thaiv corrosion.
4.Cov ntaub ntawv dab tsi feem ntau yog siv los ua cov primer? Yuav ua li cas xaiv ib qho?
Primers feem ntau yog hom epoxy, polyester, thiab polyurethane, txhua tus muaj nws tus kheej lub zog. Qhov kev xaiv yuav tsum yog raws li kev txiav txim siab zoo ntawm daim ntawv thov scenario:
Hom Primer|Core Zoo|Lub ntsiab txwv|Siv tau Scenarios
Epoxy primer|Muaj zog adhesion, zoo heev dej tsis kam, alkali tsis kam, thiab tshuaj corrosion kuj.|Yooj yim me ntsis.|Sab nraum zoov ib puag ncig uas yuav tsum muaj kev tiv thaiv corrosion siab, xws li cov tsev thiab cov nroj tsuag muaj kev lag luam.
Polyester Primer|Zoo adhesion thiab zoo heev yooj.|Tsawg resistant rau ya raws thiab tshuaj corrosion tshaj epoxy.|Kev kho kom zoo nkauj sab hauv, cov khoom siv hauv tsev, thiab lwm yam kev siv uas yuav tsum tau ua kom muaj kev ua tau zoo thiab tsis xav tau ib puag ncig.
Polyurethane Primer|Kev sib npaug tag nrho kev ua tau zoo, sib txuas cov tshuaj lom neeg zoo, ua haujlwm tsis zoo, ua haujlwm ntev, thiab yoog raws.|Tus nqi siab heev.|High-cov vaj tsev kawg lossis cov ntawv thov uas xav tau ob qho tib si yooj thiab corrosion kuj.
5.Dab tsi yog lub thickness ntawm primer? Cov qauv dab tsi txwv nws?
Primer thickness feem ntau yog 5-7μm. Lub teb chaws tus qauv GB / T 12754-2019 qhia tias kev ua haujlwm ntawm primer yuav tsum ua tau raws li qhov yuav tsum tau ua, tab sis qhov tshwj xeeb thickness feem ntau pom zoo los ntawm tus neeg muag khoom thiab tus neeg yuav khoom hauv daim ntawv cog lus. Nyob rau tib lub sijhawm, kev saib xyuas yuav tsum tau them rau qhov tsis muaj chromium-dawb ib puag ncig tiv thaiv cov cai ntawm primer.