1.Yuav ua li cas qhov nruab nrab ntsev tsuag tshuaj ntsuam xyuas cov dej noo thiab kub tsis kam?
Lub hauv paus ntsiab lus ntawm kev xeem: Hauv chav kaw ntawm 35 ° C, 5% sodium chloride tov yog hloov mus rau hauv ntsev pos nphuab siv lub sprayer thiab txuas ntxiv mus rau cov qauv saum npoo.
Yuav ntsuas qhov dej noo thiab kub ua haujlwm li cas:
Txawm hais tias qhov kev ntsuam xyuas ntsev tsuag feem ntau simulates marine los yog de-icing ntsev ib puag ncig, cov av noo thiab salinity siab ua rau muaj teeb meem loj rau cov zinc txheej.
Qhov kev sim ntsuas cov qauv saum npoo los ntawm kev soj ntsuam lub sijhawm nws siv rau cov xeb dawb (cov khoom siv xeb dawb) thiab cov xeb liab (piv txwv li hlau corrosion) ua ntej tshwm. Qhov ntev ntawm cov xeb dawb / liab xeb tshwm, qhov zoo dua cov dej noo thiab kub tsis kam (corrosion resistance).
2.Dab tsi yog lub hauv paus ntsiab lus ntawm cyclic corrosion test?
Test Principple: Qhov kev ntsuam xyuas yog ua nyob rau hauv ib qho kev pab cuam -controlled voj voog, piv txwv li:
Tshuaj tsuag ntsev theem: ntsev tsuag yog siv rau ob peb teev.
Kev ntub dej kub theem: kub thiab av noo (xws li, 40 ° C, 100% RH) yog tswj los txhawb kev loj hlob ntawm cov khoom siv corrosion.
Qhuav theem: huab cua qhuav yog qhia kom qhuav cov qauv saum npoo, simulating ib hnub - hmo ntuj voj voog.
3.Dab tsi yog qhov kev ntsuas qhov ntsuas kub ntawm lub xeev khov kho?
Qhov kev ntsuam xyuas no feem ntau tshuaj xyuas cov zinc txheej kom pom tias nws oxidizes vim kev nkag mus ntawm cov dej noo, ua rau tsim cov xeb dawb.
Qhov kev ntsuam xyuas no yog qhov tseem ceeb tshwj xeeb rau galvanized coils nrog kev kho mob passivation (xws li oiling, chrome-dawb passivation, thiab tiv thaiv- ntiv tes coatings), vim nws xyuas cov zaj duab xis passivation tsis kam rau dej nkag thiab kev ncaj ncees.
Tom qab qhov kev sim, qhov zoo li raug tshuaj xyuas rau cov kev hloov pauv, thiab hla - txiav adhesion xeem tuaj yeem ua tau los ntsuas seb cov zaj duab xis passivation lossis txheej puas tau blistered los yog poob.
4.Dab tsi yog qee qhov kev ntsuam xyuas yooj yim hauv kev siv tswv yim?
Dej Immersion Test: Muab cov qauv tso rau hauv deionized los yog kais dej ntawm qhov kub thiab txias (piv txwv li, 40 ° C) thiab saib xyuas kev tsim cov xeb dawb nyob rau lub sijhawm teev tseg (piv txwv li, 24-72 teev). Qhov no tau tshawb xyuas qhov ceev ntawm cov zaj duab xis passivation ntawm zinc txheej.
Condensation Test: Hloov pauv cov qauv mus rau qhov kub thiab txias hauv chav, ua rau muaj qhov sib txawv ntawm qhov chaw kom simulate qhov kub thiab txias tshaj plaws, thiab saib xyuas tus cwj pwm corrosion.
5.Dab tsi yog qhov ntsuas ntsuas tseem ceeb ntawm kev xeem?
Cov tsos mob hloov:
Dawb Rust tsos: Ib qho cim ntawm corrosion ntawm zinc txheej nws tus kheej.
Liab Rust tsos: Ib qho cim ntawm qhov pib ntawm corrosion ntawm lub hauv paus steel ntawv, ib qho tsis ua hauj lwm loj dua.
Discoloration thiab Gloss Poob: Qhov no siv rau galvanized coils nrog kev kho deg (xws li ntiv tes - daim ntawv tiv thaiv).
Corrosion Rate: xam raws li qhov hnyav hloov ua ntej thiab tom qab kuaj.
Scratch Corrosion Width: Tus khawb yog siv los kos los ntawm txheej ua ntej kuaj. Tom qab kev sim, qhov dav ntawm qhov corrosion txuas sab nraud los ntawm khawb yog ntsuas los ntsuas cov txheej txheem muaj peev xwm los tiv thaiv lub substrate.