I. Qhov Tseem Ceeb Ua Rau Dawb Dawb
1. Ib txwm tiv thaiv Oxidation (Iform thiab me ntsis Dawb Discoloration)
Thaum kub-dip galvanized kav yog khaws cia rau hauv qhov chaw qhuav thiab qhov cua, cov zinc txheej ntawm qhov chaw yuav maj mam hnov mob nrog oxygen thiab carbon dioxide nyob rau hauv cov huab cua los ua ib tug nyias thiab ntom alkaline carbonate zinc tiv thaiv zaj duab xis, nthuav tawm ib qho zoo nkauj matte dawb.
Qhov no yog ib qho txheej txheem passivation ntawm zinc txheej thiab tsis yog qhov teeb meem zoo; Hloov chaw, nws tuaj yeem txhim kho corrosion kuj ntawm zinc txheej.
2. Dawb xeb (thaum ntxov Corrosion ntawm zinc txheej, feem ntau txawv txav dawb discoloration)
Qhov no yog lub ntsiab yog vim li cas rau cov dawb discoloration ntawm galvanized kav. Nws yog feem ntau hu ua "ntev dawb xeb" nyob rau hauv kev lag luam thiab belongs rau corrosion poob ntawm zinc txheej.
Txoj Cai Tsim: Thaum cov kav dej galvanized tso rau hauv qhov chaw ntub dej, kaw, thiab qhov cua tsis zoo (xws li raug los nag thiab dej, ntim ntim hauv dej, nruj nreem kaw tsis muaj qhov cua, lossis thaum lub sij hawm thauj mus los nrog condensation thiab dej tsub zuj zuj), ib txheej ntawm dej zaj duab xis yuav tsim rau saum npoo; zinc undergoes electrochemical corrosion nyob rau hauv cov yeeb yaj kiab dej, tsim cov khoom siv hmoov dawb xws li zinc hydroxide thiab alkaline carbonate zinc, uas yog cov xeb dawb.
Common Inducing Factors:
Kev cia khoom tsis raug thiab kev thauj mus los: Hauv qhov chaw tsim kho / lub tsev khaws khoom, raug los nag thiab noo noo, nrog cov kav dej nruj nreem kaw tsis muaj qhov cua nkag, yog qhov tshwm sim ntau tshaj plaws ntawm -site;
Galvanizing txheej txheem tsis xws luag: tsis txaus los yog tsis sib xws nto passivation zaj duab xis kev kho mob, los yog poob ntawm lub hauv paus tiv thaiv nyhuv;
Surface Mechanical Damage: Cov zinc txheej yog khawb, thiab qhov chaw puas ntawm cov zaj duab xis passivation yog qhov ua rau corrosion, ua rau cov xim dawb hauv zos.
3. Lwm Yam Tsis tshua muaj tshwm sim
Surface Mineral Residues: Tom qab kev sib cuag nrog cov dej tawv los yog saline - ib puag ncig alkali, dej evaporates thiab tawm dej dawb teev / ntsev te. Nws tuaj yeem raug tshem tawm tag nrho los ntawm kev so.
Zinc Layer Crystallization txawv txav: Tsis zoo zinc cov kua muaj pes tsawg leeg thiab txias ceev thaum lub sij hawm galvanizing ua rau cov zinc txheej ua dawb vim crystallization, uas yog ib qho tsis xws luag thiab tsis cuam tshuam rau corrosion kuj.
II. Kev cuam tshuam rau kev siv li qub
Qhov kev cuam tshuam ntawm kev siv ib txwm yog nyob ntawm qhov hnyav ntawm cov xim dawb thiab seb cov txheej zinc hauv qab thiab cov yeeb nkab steel substrate puas lawm. Muaj peb hom xwm txheej:
1. Me ntsis Uniform Dawb Discoloration / Mild White Rust: Tsis cuam tshuam rau kev siv ib txwm
Kev Txiav Txim Siab: Cov txheej txheej xim dawb yog nyias thiab sib xws. Tom qab so nrog ib daim ntaub qhuav, lub hauv paus zinc txheej tsis zoo, muaj xim hlau nplaum, tsis muaj khawb los yog qhov, thiab tsis muaj xim liab - xim av xeb.
Kev piav qhia: Tsuas yog cuam tshuam rau qhov pom. Qhov kev tiv thaiv anode kev ua haujlwm ntawm zinc txheej yog qhov pib tsis zoo, thiab cov yeeb nkab steel substrate yuav tsis raug corroded, thiab tuaj yeem siv ib txwm siv rau hauv tsev thaiv, kev txhawb nqa, thiab cov xwm txheej sib kis dej zoo tib yam, nrog kev cuam tshuam tsis zoo rau tag nrho lub neej corrosion.
Ntxiv: Tom qab ntxuav cov xeb dawb me me, hauv qhov chaw qhuav thiab qhov cua, cov yeeb yaj kiab tiv thaiv yuav raug rov ua dua, thiab tus nqi corrosion yuav qeeb qeeb.
2. Qhov Nruab Nrab Dawb xeb: Corrosion Lub neej poob qis, yuav tsum tau ntsuas raws li qhov xwm txheej
Kev Txiav Txim Siab: Cov txheej xeb dawb yog tuab thiab hmoov, thiab tom qab so, cov zinc txheej qhia me ntsis khawb, tab sis cov hlau hauv qab (tsis muaj xim liab- xim av xeb) tsis raug.
Kev piav qhia: Cov txheej zinc tau dhau los ua qhov tsis zoo ntawm corrosion, thiab tag nrho corrosion kuj txo, ua rau muaj qee yam kev txo qis hauv kev pab cuam lub neej.
Qhuav sab hauv tsev, tsis yog - cov xwm txheej siab (xws li cov kav hlau thaiv hauv tsev): tseem tuaj yeem siv tau ib txwm. Nws raug nquahu kom so huv thiab siv ib txheej ntawm cov xim txias galvanized rau kev kho;
Sab nraum zoov, ntub dej, thiab lub zog kis tau tus mob: Tsis pom zoo rau kev siv sijhawm ntev -. Tus nqi corrosion yuav nrawm, thiab muaj kev pheej hmoo ntawm kev tawg ntxov ntxov thiab to.
3. Kev puas tsuaj loj heev nrog cov xeb liab: cuam tshuam rau kev siv, yuav tsum tau kho lossis hloov
Kev piav qhia: Lub sijhawm no, cov zinc txheej tau ua tsis tiav, poob nws txoj kev tiv thaiv ntawm cov yeeb nkab steel substrate, thiab cov hlau hauv qab yuav sai sai corrode, ua rau txo qis hauv cov yeeb nkab phab ntsa zog thiab muaj kev pheej hmoo ntawm perforation thiab to hauv cov kav dej siab, thiab muaj peev xwm muaj peev xwm tsis muaj peev xwm ntawm cov khoom siv.
Cov lus qhia txog kev kho mob: loj- nplai rusting qhia ncaj qha hloov; rau cov xim liab me me hauv zos, nws tuaj yeem kho tau los ntawm kev xuab zeb thiab txau zinc- nplua nuj xim, tab sis qhov kev tiv thaiv corrosion yog qis dua li lub Hoobkas qub galvanizing txheej.
Ntxiv: Kev Tiv Thaiv thiab Kev Kho Kom Yooj Yim Thaum khaws cia, muab cov khoom tso rau ntawm qhov chaw sawv ntsug, ua kom nws muaj cua, tsis txhob ntub dej, thiab kaw lub pob nrog lub qhov ua pa. Qhov no tuaj yeem txo qhov tshwm sim ntawm xeb dawb;
Rau cov xeb dawb me me, tsuas yog so nws nrog ib daim ntaub qhuav los yog cov ntaub plaub zoo. Rau nruab nrab xeb dawb, tom qab so, siv cov xim txias galvanized los kho feem ntau ntawm kev tiv thaiv -corrosion peev xwm.
