Dab tsi txog qhov cuam tshuam rau kev corrosion tsis kam ntawm cov hlau galvanized?
Lub corrosion tsis kam ntawm cov hlau galvanized yog ib qho ntawm nws cov yam ntxwv tseem ceeb thiab muaj kev cuam tshuam los ntawm kev sib xyaw ntawm cov yam ntxwv, feem ntau cov hauv qab no:
1. Cov yam ntxwv ntawm cov txheej zinc
Zinc Txheej Thickness thiab kev sib xyaw
Zinc Txheej Thickness yog lub hauv paus ntawm kev tiv thaiv corrosion: cov tuab tuab,
Kev sib txuam yog qhov tseem ceeb: yog tias cov txheej zinc ib yam nkaus, tau ua kom cov ntsiab lus tseem ceeb, lossis muaj cov ntsiab lus me me
Zinc Txheej Txheej Txheem thiab Muaj pes tsawg leeg
Lub zinc txheej kub - dip galvanized steel txheej txheem zinc nto txheej thiab ib qho zinc {}}} hlau txheej hauv qab. Lub ntom ntom thiab tuab piv ntawm alloy txheej cuam tshuam rau corrosion tsis kam. Piv txwv li, ib txheej tuab tuab tuab yuav nce cov txheej zinc loj dua Lub xub ntiag ntawm alloy cov khoom xws li txhuas xws li txhuas nyob rau hauv ib txheej zincent (txhuas yog ntxiv rau kev hloov kho cov txheej txheem ntawm zinc thiab cuam tshuam rau tus nqi corrosion.
Ii. Substrate cov yam ntxwv thiab qhov xwm txheej nto
Substrate muaj pes tsawg leeg thiab cov khoom zoo
Cov pa roj carbon cov ntsiab lus thiab cov ntsiab lus xws li silicon thiab phosphorus) ntawm cov txheej txheem (steel phaj) yuav cuam tshuam cov txheej txheem kos duab ntawm zinc txheej thiab lub substrate. Piv txwv li, steel nrog cov ntsiab lus silicon ntau dhau yuav ua rau muaj kev cuam tshuam nrog kev sib tw xoob, ua rau cov chaw xoob, txo cov xeb ntawm cov chaw xoob, txo qis corrosion.
Ntsis qhov tsis xws li cov roj stains, nplai, thiab khawb ntawm cov txheej txheem tuaj yeem cuam tshuam rau kev tiv thaiv zinc, ua rau muaj kev tiv thaiv no tsis muaj zog.
Substrate xeb
Yog tias xeb tau tshwm sim rau ntawm cov hlau phaj ua ntej galvanizing (piv txwv, xeb tawm ntawm cov txheej txheem txias, muaj peev xwm ua kom muaj kev phom sij uas tsis muaj zog, ua rau muaj kev phom sij uas tsis muaj zog, ua rau muaj kev phom sij
III. Environmentalency
Hom thiab concentration ntawm corrosive media
Muaj cov kab ke (muaj cov sulfur dioxide, hydrogen sulfide, thiab lwm yam), cov suab paj nruag av (siab av noo) tuaj yeem nrawm nrawm Zinc corrosion. Piv txwv li, Galvanized steel ntawv hauv thaj chaw ntug hiav txwv corrode 2-3 zaug sai dua li cov nyob hauv thaj av, thaj chaw qhuav.
Kev txiav tawm ntau dhau ntawm chloride thiab sulfate ions hauv cov av kuj tseem tuaj yeem nrawm qhov corrosion ntawm av av galvanized.
Thiab Vaum
Kev kub siab thiab cov av noo (xws li chaw dav dav dav dav thiab cov pa hluav taws xob sib xyaw ua ke ntawm zinc, thiab cov pa roj ofting) txhawb kev noj ntawm zinc txheej.
Kev hloov pauv kub kub hnyav (xws li hnub loj {{0} Hmo ntuj sib txawv thiab kev sib txawv ntawm cov txheej txheem zinc
Lub teeb thiab UV
Raug rau lub hnub ci rau ncua sijhawm, UV rays ntawm galvanized steel ntawv pib ua yeeb yaj kiab passivation (zinc hydroxide) ntawm cov nyhuv zinc, txo nws cov nyhuv tiv thaiv.
IV. Post - kev kho thiab kho cov txheej txheem
Cov txheej txheem kho deg deg
Kev kho mob passivation (xws li chromate passivation thiab chromium {0} Kev txhim kho corrosion thiab kev txhim kho corrosive oxide zaj duab xis ntawm hluav taws xob cov ntawv hluav taws xob). Ua ntawv thov cov khaubncaws sab nraud pov hwm cov roj xws li roj lossis pleev xim: tsim cov xim hlau (xws li xim tawv nqaij (xws li cov xim tawv nqaij) tsim lub cev lub cev, txuas ntxiv txuas ntxiv lub neej corrosion.
Ua thiab installation puas tsuaj
Yog hais tias lub zinc txheej ntawm galvanized steel ntawv yog puas (xws li kev txiav lossis khawb, lossis ib qho chaw ua kom zoo nkauj "kev tua kab" kev ua kom nrawm nrawm.
Thaum lub sij hawm installation, sib chwv me ntsis nrog cov hlau tsis sib xws (xws li cov hlau tooj liab lossis cov av noo) nyob hauv ib puag ncig hluav taws xob, nrawm nrawm ntawm cov txheej txheej zinc.