1.Dab tsi yog vim li cas rau cov xeb dawb ntawm qhov chaw?
Ua rau: Hauv qhov chaw ntub dej, tsis muaj qhov cua, zinc txheej reacts nrog noo noo thiab oxygen los ua ib qho dawb, fluffy yooj yim zinc carbonate lossis zinc oxide.
Cov tsos mob: Dawb los yog grey powdery, filmy thaj ua rau thaj.
Qhov hnyav: me me oxidation. Cov xwm txheej no tsuas yog tawm tsam cov txheej txheem zinc txheej, tawm hauv cov hlau tsis muaj kev puas tsuaj. Qhov no yog qhov yooj yim tshaj los kho.
2.Dab tsi yog qhov ua rau ntawm qhov tsaus nti / dullness ntawm qhov chaw?
Ua rau: Cov yeeb yaj kiab oxide tuab ib txwm ua rau ntawm zinc txheej hauv huab cua, lossis los ntawm kev cuam tshuam nrog sulfides.
Cov tsos mob: Qhov saum npoo yog tsaus lossis dub, tab sis tseem du rau qhov kov.
Mob hnyav: mob me heev. Qhov ntom ntom oxide zaj duab xis no tuaj yeem qee zaum txawm tias muab kev tiv thaiv, tab sis feem ntau yog siv rau cov laj thawj zoo nkauj.
3.Dab tsi yog qhov ua rau liab xeb ntawm qhov chaw?
Ua rau: zinc txheej tau corroded kiag li, tawm hauv lub hauv paus steel substrate rusting.
Cov tsos mob: liab los yog xim av xeb.
Severity: Nruab nrab mus rau hnyav oxidation. Kev tiv thaiv xeb ploj, ua rau kho nyuaj thiab ua rau txo qis kev ua haujlwm.
4.Yuav ua li cas ntxuav qhov chaw thiab passivation?
Tshuaj ntxuav:
Rau cov xeb dawb: Siv cov tshuaj dilute acetic acid (vinegar txaus) lossis 5% -10% phosphoric acid tov. Cov acids tsis muaj zog no teb nrog cov xeb dawb los ua cov dej-soluble zinc ntsev.
Rau cov pob dub: Siv cov tshuaj ammonia diluted.
Yuav ua li cas: Siv cov ntaub mos muag los yog txhuam txhuam dipped rau hauv cov tshuaj thiab so cov oxidized nto kom txog thaum cov khoom dawb los yog dub ploj.
Mechanical Cleaning:
Rau lub teeb dawb xeb, koj tuaj yeem siv cov ntaub qhwv huv, cov ntaub qhwv ntsej muag (siv qhov kawg), los yog cov txhuam txhuam mos mos rau ntub lossis qhuav.
Qhov tseem ceeb: Ua siab mos thiab tsom kom tshem tawm cov khoom siv corrosion, tsis txhob tshem tawm cov txheej zinc tsis zoo.
Tom qab-kev kho mob:
Flushing nrog dej huv: Tom qab siv tshuaj kho mob, yaug qhov chaw kom huv si kom tshem tawm tag nrho cov tshuaj seem.
Qhuav kom huv si: Tam sim ntawd qhuav nrog ib daim ntaub huv los yog tshuab ziab nrog cov cua compressed kom tsis txhob xeb lwm yam.
Passivation: Tom qab qhov chaw huv si thiab qhuav, tshuaj tsuag lossis txhuam rau ntawm cov tshuaj chromate passivation los yog chromium -dawb passivation tov. This creates a new, dense protective film on the zinc layer, preventing the recurrence of white rust. Qhov no yog ib kauj ruam tseem ceeb hauv kev kho kom zoo.
5.Yuav ua li cas tshem tawm xeb thiab rov tsim cov zinc txheej?
Kev kho deg:
Mechanical Rust Removal: Use sandpaper, a wire wheel, an angle grinder with a wire brush, or a louver to thoroughly remove the rusted area and the surrounding loose zinc layer until the metallic luster is exposed. Rau cov cheeb tsam loj, sandblasting yog txoj kev zoo tshaj plaws.
Acid Cleaning: Industrially, kua qaub ntxuav nrog hydrochloric acid los yog lwm yam acids yog pom zoo, tab sis lub sij hawm thiab concentration yuav tsum tau nruj me ntsis tswj los tiv thaiv corrosion ntawm qhov chaw tsis zoo. Qhov no kuj yog tus nqi ib puag ncig siab thiab tsis haum rau me me - nplai, ntawm - kho qhov chaw.
Restoring lub xeb-Cov txheej txheem pov thawj:
Kev siv zinc- nplua nuj xim: Qhov no yog txoj kev kho zoo tshaj plaws.
Nws ua haujlwm li cas: Zinc- cov xim nplua nuj muaj cov zinc hmoov ntau. Thaum ua ntawv thov rau thaj tsam polished, zinc hmoov nyob rau hauv lub resulting xim zaj duab xis, tom qab ziab, ua "sacrificial anode" los tiv thaiv cov hlau substrate.
Yuav Thov Li Cas: Siv zinc- cov xim nplua nuj sib npaug rau cov hlau uas huv huv. Ob lossis ntau lub tsho tiv no feem ntau yuav tsum tau ua kom muaj cov xim tuab thiab txuas ntxiv.