1.Qhov kev ua ntawm txheej galvanized puas cuam tshuam rau oxidation nto ntawm galvanized kauj?
Zinc yog ib qho tshuaj lom neeg hlau uas tshwm sim nrog cov pa oxygen hauv huab cua, tsim cov yeeb yaj kiab ntom ntom tab sis nyias nyias ntawm zinc oxide (ZnO). Cov yeeb yaj kiab no feem ntau tiv thaiv oxidation ntxiv ntawm zinc hauv. Thaum peb tham txog cov teeb meem oxidation, peb feem ntau txhais tau hais tias corrosion hnyav dua li qhov kev tiv thaiv ib txwm muaj.
2.Puas qhov zoo ntawm qhov chaw passivation cuam tshuam rau saum npoo oxidation ntawm galvanized coils?
Txhawm rau tiv thaiv oxidation, feem ntau galvanized coils tau txais kev kho mob ua ntej tawm hauv lub hoobkas. The passivation layer forms a more stable, dense protective film (such as a trivalent chromium or chromium-free passivation film) on the surface of the zinc coating, effectively isolating the zinc from air and moisture.
Ua rau: Kev tsim cov tshuaj passivation tsis raug, qhov tsis sib xws passivation zaj duab xis tuab, tsis txaus tom qab-passivation tu, lossis kev puas tsuaj rau cov yeeb yaj kiab passivation tuaj yeem txo nws cov khoom tiv thaiv, ua rau thaj chaw lossis tag nrho oxidation.
3.Yuav ua li cas cov av noo ib puag ncig cuam tshuam cov xeb ntawm cov galvanized coil nto?
Zinc corrosion nyob rau hauv qhov chaw ntub dej tuaj yeem tshwm sim los ntawm oxygen concentration gradients. Qhov sib txawv ntawm cov txheej coil, vim qhov cua tsis zoo, muaj cov pa oxygen tsawg, tsim cov anodes. Lub caij no, cov npoo ntawm cov coils, nplua nuj nyob rau hauv oxygen, ua cathodes. Qhov no tsim cov galvanic cell, sai sai corroding zinc nyob rau hauv qhov khoob, ua ib tug dawb, xoob "xeb" (feem ntau yog tsim ntawm zinc hydroxide (Zn(OH)₂) thiab zinc carbonate (Zn₅(CO₃)₂(OH)₆).
Cov peev txheej dej:
Rainwater: raug los nag thaum lub sij hawm sab nraum zoov cia lossis tsheb thauj mus los.
Condensation: Qhov no yog qhov feem ntau insidious thiab feem ntau ua rau. Thaum lub ambient kub fluctuates heev (xws li thaum lub sij hawm ib tug loj sib txawv ntawm nruab hnub thiab hmo ntuj), qhov kub thiab txias nyob rau hauv lub coil poob qis hauv qab lub dew point ntawm cov huab cua puag ncig. Dej vapor nyob rau hauv cov huab cua condenses nyob rau hauv lub txias coil nto, tsim tee dej. Vim tias cov coils yog nruj nreem kaw, qhov dej noo no nyuaj rau evaporate thiab tseem nyob nruab nrab ntawm cov khaubncaws sab nraud povtseg rau lub sijhawm ntev.
4.Dab tsi yog qhov kev cia thiab kev thauj mus los tsis zoo?
Kev tso ncaj nraim rau hauv av: av noo tuaj yeem nkag ncaj qha rau hauv cov yob.
Tight stacking: Kaw kev sib cuag ntawm cov yob hinders cua ncig thiab yooj yim accumulates noo noo.
Kev ntim khoom puas tsuaj: Kev puas tsuaj rau lub ntim sab hauv (tiv thaiv- cov ntawv roj xeb lossis VCI zaj duab xis) lossis cov ntim khoom sab nrauv (cov ntawv hlau lossis cov ntaub ntawv tsis muaj dej tsis sib haum) ua rau cov yob kom ya raws.
5.Dab tsi yog qhov xwm txheej ntawm oxidation (dawb xeb)?
Kev thauj mus los hauv hiav txwv: Lub siab salinity thiab av noo ntawm dej hiav txwv tsim ib qho chaw muaj corrosive heev.
Kev khaws cia thaum lub caij los nag: Cov khoom thauj yog khaws cia ntawm cov chaw nres nkoj lossis hauv cov chaw qhib rau lub sijhawm ntev, raug tshav ntuj thiab los nag, thiab kub hnyiab tau ntev.
Kev thauj mus los thoob plaws cheeb tsam kub: Piv txwv li, thaum thauj khoom los ntawm qhov chaw nres nkoj txias sab qaum teb mus rau thaj chaw kub thiab ntub dej, cov khoom thauj khoom uas tsis tshua muaj kub ua rau muaj kev pheej hmoo siab ntawm condensation thaum raug huab cua sov.
Lub tsev tso cua tsis zoo: Cov tsev khaws khoom hauv tsev uas ntub thiab tsis muaj qhov cua tuaj yeem ua rau muaj qhov sib xyaw ua ke thiab noo noo.