1.What yog qhov tseem ceeb lav ntawm corrosion tsis kam?
Hauv paus txheej: kev tiv thaiv kev tiv thaiv anodic rau lub galvanized substrate
Lub zinc txheej (kub {- dip galvanizing / electrogalvanizing) inherently muab kev tiv thaiv corrosion. Thaum cov ntawv kos me me tshwm sim ntawm cov txheej txheem, zinc corrodes electrochemically (kev txi) ua ntej xeb los ntawm kev sib sau ntawm cov hlau substrate. Ib txhij, zinc corrosion khoom (xws li zinc hydroxide) tsim cov yeeb yaj kiab sib txawv ntawm cov npoo av, ntxiv kev cais cov neeg sawv cev corrosive.
Nruab nrab txheej: tus thawj coj ob lub luag hauj lwm ntawm "kev thaiv khaub ncaws + adhesion"
Primers (feem ntau epoxy thiab polyester primers) yog qhov tseem ceeb rau kev sib txuas cov substrate thiab topcoat. Lawv cov qauv molecular thiab cov nplaum ua kom muaj zog rau zinc txheej (hla- Hatch adhesion yog feem ntau tsawg dua los yog sib npaug rau 5 MPa) zoo:
Cov ntaub thaiv npog cov neeg sawv cev xws li ya raws, oxygen, thiab chloride ions los ntawm kev nkag mus rau cov txheej zinc;
Tiv thaiv cov kuab tshuaj hauv lub topcoat los ntawm disinc txheej zinc, tiv thaiv kev cuam tshuam delamination ntawm txheej. Nto: Topcoat's "Huab Cua Nrov + Corrosion - istant" tiv thaiv
Topcoats (xws li polyester thiab fluorocarbon topcoats) yog kev sib cuag ncaj qha nrog kev txiav txim siab sab nraud, thiab lawv txoj kev tawm tsam ntawm kev txiav txim siab cov khoom lag luam ntev:
Cov Topcoats dog dig, tiv thaiv huab cua huab cua tiv thaiv tsis muaj zog, tiv thaiv UV - inducts degradation;
Fluorocarbon Topcoats (Fluorinated Resins): Muab qhov siab tshaj plaws corrosion tsis kam. Cov tshuaj fluorocarbon (c - f) rapsant muaj zog ish, acid los nag, thiab kev tsis tshua muaj cua daj cua dub, thiab ua kom tsis muaj cov khoom noj kua txiv, thiab ua rau muaj kev tsis txaus siab nrog cov corrosive tawm;
Silicone {-}} hloov cov toplicats
2.Qhov dab tsi yog qhov ntsuas tshwj xeeb ntawm kev xeb tawm tsam?
Kev Ntsuas Nruab Nrab Ntsev Tshuaj Kuaj, Kub thiab Vaum Kev Kuaj, Acid Reistorance Xeem, Alkali Kuj Xeem
3.How yog txheej txheej xaiv muaj cuam tshuam corrosion tsis kam?
Hom Popcoat yog qhov txiav txim siab: fluorocarbon Poscoat> Silicone {} {hloov sab topcoat> hauv kev txiav txim ntawm corrosion tsis kam). Piv txwv li, fluorocarbon ob npaug- Cov txheej txheem txheej txheem phab ntsa, thaum lub sijhawm Polyester ob npaug rau cov khoom siv hauv tsev. Kev xaiv cov khoom yog nyob ntawm daim ntawv thov.
4.What yog qhov tseem ceeb cuam tshuam rau corrosion tsis kam?
Txheej thickness thiab kev sib dhos
Tag nrho qhuav zaj duab xis tuab (Primer + Topcoat) feem ntau yuav tsum muaj ntau dua lossis muaj ntau dua lossis sib luag rau 40μm (rau cov ntawv thov loj). Cov tuab tuab tuab tuaj yeem yooj yim coj rau Media media, thaum tsis xwm yeem thickness tuaj yeem ua rau corrosion hauv thaj chaw nyias. Cov qauv kev lag luam yog cov yeeb yaj kiab qhuav thickness kam rau ntau dua los yog sib npaug ± 2μm (cov menyuam txheej txheem txheej txheem).
Kho cov txheej txheem tsis
Kev kho qhov kub thiab lub sijhawm ntawm lub primer thiab topcoat ncaj qha cuam tshuam rau txheej txheej crosslinking℃(yuav tsum tau loj dua lossis sib npaug ntawm 90%). Kev kho tsis txaus (piv txwv li, tsawg dhau qhov kub thiab txias, ua rau kev tsim cov hws uas tsis tiav ntawm corrosive media, loj dua ua rau corrosion tsis kam.
Substrate pretreatment zoo
Cov roj tsis ua tiav (cov roj uas tseem tshuav ntawm cov npoo) thiab tom qab siv cov txheej txheem sib txawv (piv txwv li. Tev}
5.Qhov yog lub corrosion resistance kev ua yeeb yam hauv cov ntawv teev npe raug?
Rau cov ntawv thov sab hauv tsev (xws li cov khoom siv hluav taws xob thiab cov hnab ntim khoom muaj zog): dog dig}
Rau cov ntawv thov sab nraum zoov sab nraum zoov (xws li cov tsheb ciav hlau sab nraum zoov thiab kev sib tw ua lag luam hauv lub neej ({}}}}
Rau hnyav sab nraum zoov / siab- Corrosion lub tsev kab hlau rhuav thaiv (thiab sab nraum zoov} life} Qee qhov siab - Cov khoom txheem txheem (xws li triple {}