1.Dab tsi yog txoj hauv kev ua haujlwm ntawm cov txheej txheem passivation?
Passivation yog cov tshuaj hloov pauv tshuaj ua rau ntawm zinc plating txheej los ua ib qho nyias nyias (feem ntau tsuas yog kaum rau pua pua nanometers) thiab cov yeeb yaj kiab tiv thaiv ntom ntom. Lub luag haujlwm tseem ceeb ntawm zaj duab xis no yog:
Kev rho tawm: Nws cais cov reactive zinc nto los ntawm sab nraud corrosive ib puag ncig (xws li oxygen, noo noo, thiab ntsev nyob rau hauv cov huab cua), ua raws li lub cev barrier.
Inhibition ntawm electrochemical tshuaj tiv thaiv: Zinc corrosion yog txheej txheem electrochemical. Cov zaj duab xis passivation tuaj yeem cuam tshuam cov anodic lossis cathodic cov tshuaj tiv thaiv hauv cov txheej txheem no, yog li txo qis tus nqi corrosion.
2.Yuav ua li cas zoo li passivation txheej tiv thaiv ntsev tsuag?
Kev ntsuam xyuas ntsev tsuag yog ib txoj hauv kev los ntsuas qhov kev tiv thaiv corrosion ntawm cov ntaub ntawv sai sai los ntawm simulating ib puag ncig hnyav xws li cov huab cua hauv hiav txwv los yog de- cov tshuaj icing. Chav tsev yog "teev teev," qhia lub sijhawm nws siv rau cov xim dawb lossis xim liab tshwm.
Zinc coils tsis passivation: Nyob rau hauv tus qauv nruab nrab nruab nrab ntsev tsuag tshuaj tsuag, lawv tsuas kav li ob peb teev mus rau kaum teev ua ntej dawb xeb tshwm.
Zinc coils nrog passivation: Lub sij hawm ntsev tsuag kuj tuaj yeem nce ntxiv, ob peb zaug lossis kaum tawm zaus.
3.Dab tsi yog qhov tseem ceeb cuam tshuam rau cov ntsev tsuag tsis kam ntawm cov txheej passivation?
Hom Passivation: Raws li qhia hauv cov lus saum toj no, qhov no yog qhov tseem ceeb tshaj plaws. Trivalent chromium passivation tam sim no yog qhov kev xaiv zoo tshaj plaws ntsuas kev ua tau zoo thiab kev phooj ywg ib puag ncig.
Passivation Film Thickness thiab Uniformity: Lub thicker, zoo ib yam, thiab denser zaj duab xis, qhov zoo dua nws cov nyhuv barrier thiab lub sij hawm ntev nws cov ntsev tsuag kuj.
Zoo ntawm Zinc Plating Txheej Nws tus kheej: Cov txheej txheej passivation yog ua rau saum txheej zinc. Yog hais tias zinc txheej nws tus kheej muaj porosity, impurities, los yog tsis sib xws thickness, nws yuav ncaj qha cuam tshuam rau qhov zoo thiab continuation ntawm passivation zaj duab xis.
Passivation Process Control: Qhov no suav nrog cov concentration, qhov kub thiab txias, pH tus nqi, thiab lub sijhawm ua haujlwm ntawm cov tshuaj passivation, nrog rau qhov kub thiab lub sijhawm ziab tom qab, tag nrho cov no cuam tshuam rau kev ua haujlwm ntawm qhov kawg passivation zaj duab xis.
4.Dab tsi yog hom passivation?
Chromium-dawb passivation: Ib puag ncig tus phooj ywg, tsis muaj chromium hnyav hlau. Kev ua tau zoo sib txawv heev.
Trivalent chromium passivation: tam sim no lub ntsiab thev naus laus zis, tus phooj ywg ib puag ncig thiab nrog kev ua haujlwm zoo.
Hexavalent chromium passivation: cov txheej txheem ib txwm muaj nrog kev ua tau zoo, tab sis muaj tshuaj lom thiab raug txwv.
5.Dab tsi cuam tshuam li cas cov txheej txheem passivation ntawm galvanized coil muaj kev txhim kho nws cov tshuaj ntsev (thiab corrosion) tsis kam?
Lub passivation txheej ntawm galvanized coils yog tsim tshwj xeeb los txhim kho lawv cov tshuaj tsuag ntsev (thiab corrosion) tsis kam. Los ntawm kev tsim cov yeeb yaj kiab tiv thaiv ntom ntom, nws ua kom cov ntsev tsuag tshuaj tiv thaiv lub sij hawm ntawm cov galvanized coils los ntawm kaum ntawm cov xuab moos mus rau ntau pua teev, ua rau nws yog ib qho tseem ceeb rau kev ua kom tau raws li cov kev cai tiv thaiv corrosion ntawm automotive, khoom siv hauv tsev, thiab kev tsim kho kev lag luam.