1.Dab tsi yog qhov cuam tshuam ntawm txheej aging thiab degradation?
Ultraviolet Radiation: Ultraviolet hluav taws xob los ntawm tshav ntuj yog lub ntsiab culprit nyob rau hauv txheej aging. Nws rhuav tshem cov tshuaj bonds ntawm txheej txheej polymer resin, ua rau:
Poob Gloss thiab Fading: Degradation ntawm pigments thiab resins.
Chalking: Tsim kom muaj ib qho xoob hmoov txheej ntawm txheej txheej.
Thaum tshav kub kub thiab noo noo:
Thermal Expansion and Contraction: Kev rov ua dua tshiab ua rau muaj kev ntxhov siab ntau ntxiv hauv cov txheej, ua rau microcracks.
Hydrolysis: Moisture (tshwj xeeb tshaj yog nyob rau hauv high kub thiab av noo) nkag mus rau lub txheej, ua rau resin hydrolysis thiab txo adhesion.
Chemical Erosion: Acid los nag, muaj kuab paug, tshuaj tsuag ntsev, thiab lwm yam, tuaj yeem cuam tshuam nrog cov txheej txheem txheej txheej, eroding txheej.
2.Dab tsi yog qhov tshwm sim ntawm qhov tsis zoo substrate pretreatment zoo?
Tsis tiav degreasing: Roj residue ntawm lub substrate nto tiv thaiv kev hloov dua siab tshiab zaj duab xis thiab txheej los ntawm adhering khov kho.
Kev hloov pauv zaj duab xis tsis zoo: Yog tias cov yeeb yaj kiab hloov dua siab tshiab yog nyias, tsis sib xws, lossis crystallized tsis zoo, nws cov kev tiv thaiv corrosion thiab adhesion - txhim khu kev ua haujlwm tau txo qis. Qhov no yog ib qho ntawm cov hauv paus ntsiab lus ntawm "hauv- zaj duab xis corrosion."
3.Dab tsi yog qhov cuam tshuam ntawm kev puas tsuaj los yog txiav corrosion?
Kev tsim kho thiab kev puas tsuaj: Thaum lub sij hawm thauj mus los, hoisting, thiab installation, cov txheej yuav raug khawb, abraded, los yog cuam tshuam los ntawm cov khoom tawv.
Kev Txiav Txim: Cov hlau txiav tawm raug tsim los ntawm shearing, xuas nrig ntaus, drilling, thiab lwm yam, yog cov ntsiab lus tsis muaj zog tshaj qhov corrosion thawj zaug thiab kis tau. Txawm hais tias aluminized zinc substrates muaj "tus kheej- kho" muaj peev xwm, lawv tseem xav tau kev tiv thaiv hauv ib puag ncig hnyav.
Bending Cracking: Tsis txaus khoov lub vojvoog lossis cov txheej txheej tsis txaus thaum lub sijhawm tsim tuaj yeem ua rau micro- tawg tsis pom ntawm qhov muag liab qab ntawm cov ntsiab lus khoov, tso cai rau cov xov xwm corrosive nkag mus.
4.Dab tsi cuam tshuam ib puag ncig thiab tsim teeb meem?
Hnyav Ib puag ncig: Ntev ntev raug rau cov av noo siab, siab salinity (cov cheeb tsam ntug dej hiav txwv), siab acidity / alkalinity (cov cheeb tsam kev lag luam), los yog muaj zog ultraviolet hluav taws xob (siab tshaj qhov siab) tshaj cov txheej txheem tsim kev txwv.
Kev Tsim Nyog:
Dej Txau: Kev nqes tsis txaus nyob rau hauv lub ru tsev lossis phab ntsa vaj huam sib luag tsim ua rau cov dej sib xyaw ua ke.
Tiv tauj Corrosion: Kev sib cuag ncaj qha nrog cov hlau sib txawv (xws li tooj liab lossis cov hlau tsis kho) ua rau electrochemical corrosion.
Kev ua pa tsis zoo: Kev ua pa tsis zoo thiab cov cua kub dissipation ntawm ob - txheej panels tiv thaiv condensation los ntawm ntws dej, tsim kom muaj huab cua puag ncig.
5.Qhov kev tiv thaiv thiab kev daws teeb meem yog dab tsi?
Kev xaiv khoom zoo:
Xaiv cov txheej txheem txheej txheej raws li kev thov ib puag ncig (xws li PVDF fluorocarbon lossis HDP siab- polyester durability yog nyiam rau cov ntug dej hiav txwv thiab chaw lag luam).
Xaiv cov khoom muaj npe nrov nrog cov txheej txheem tsim khoom ruaj khov kom ntseeg tau tias pretreatment thiab txheej zoo.
Standardized Processing thiab Application:
Siv cov ntaub thaiv npog thaum ua haujlwm kom tsis txhob khawb.
Ua raws sij hawm thiab ua tib zoo sealing tiv thaiv rau tag nrho cov machined txiav thiab drilled qhov siv tshwj xeeb xim -coated steel kho xim los yog sealant.
Siv cov cuab yeej nqa muag thaum lub sijhawm teeb tsa kom tsis txhob muaj kev sib txhuam.
Optimal Design:
Tsis txhob muaj cov qauv uas ua rau cov dej sib sau ua ke thiab xyuas kom muaj qhov cua thiab dej kom zoo.
Tsis txhob kov ncaj qha nrog cov ntaub ntawv tsis sib xws.