1. Txheej txheem cej luam ntawm galvanized yeeb nkab
Txhawm rau txhim kho corrosion kuj ntawm cov yeeb nkab steel, galvanized steel yeeb nkab dav dav. Galvanized kav (galvanized steel kav) muab faib ua ob hom: kub-dip galvanized thiab txias-dip galvanized. Qhov kub-dip galvanized galvanized txheej yog tuab, muaj qhov zoo ntawm cov khoom siv galvanization, muaj zog adhesion, thiab kev pab lub neej ntev. Tus nqi ntawm cov kav dej txias galvanized yog tsawg, thiab qhov saum npoo tsis zoo heev. Kev tiv thaiv corrosion ntawm nws tus kheej yog txawv ntau dua li cov yeeb nkab kub-dip galvanized, thiab nws tau maj mam tshem tawm.
Feem ntau ntawm cov tsev qub hauv kuv lub tebchaws yog siv cov kav dej galvanized. Cov kav hlau uas feem ntau siv hauv cov roj thiab cua sov kuj yog cov kav dej galvanized. Raws li cov yeeb nkab dej, raws li cov yeeb nkab dej, nrog rau kev sib sau ntawm lub sijhawm siv, ntau cov xeb yog tsim nyob rau hauv cov yeeb nkab. Qhov no tsis tsuas yog pollutes cov khoom huv si, tab sis kuj yog tov nrog cov kab mob yug me nyuam hauv cov phab ntsa du. Kev noj qab haus huv. Nyob rau xyoo 1960 thiab xyoo 1970, qee lub tebchaws tsim tau pib tsim cov kav dej tshiab thiab cov kav dej tsis muaj zog galvanized. Plaub lub tuam tsev thiab cov thawj coj ntawm Ministry of Construction ntawm Tuam Tshoj kuj tau hais meej meej tias cov kav dej galvanized galvanized tau raug xiam los ntawm 2000. Tam sim no, cov kav dej txias hauv cov zej zog uas tau tsim tshiab tsis tshua siv cov kav dej galvanized. Cov kav dej kub hauv qee lub zej zog siv cov kav dej galvanized.
Galvanized kav tau muab faib ua cua sov-galvanized steel kav thiab txias-galvanized steel kav, uas txias galvanized steel kav tau maj mam tshem tawm.
1. Kub -dip galvanized yeeb nkab / kub -dip galvanized steel yeeb nkab
Cov hlau kub-dip galvanized reacts nrog cov hlau-raws li cov tshuaj tiv thaiv los tsim cov txheej txheem alloy, uas sib txuas cov substrate thiab txheej. Kev tsim cov kav dej kub-dip galvanized yog khaws cov kav hlau ua ntej kom tshem tawm cov hlau oxide ntawm qhov chaw ntawm cov yeeb nkab steel. Tom qab pickling, ntxuav los ntawm ammonium chloride los yog chloride dej chloride los yog ammonium chloride thiab zinc chloride hybrid dej grooves rau tu, Thiab ces xa mus rau lub kub immersion zawj.
Kub-dip galvanized steel yeeb nkab yog ib qho nyuaj rau lub cev thiab tshuaj lom neeg cov tshuaj tiv thaiv ntawm cov yeeb nkab steel matrix thiab melting plating kua, ua ib tug nruj zinc hlau alloy txheej nrog corrosion kuj. Cov txheej txheej alloy yog kev sib xyaw nrog cov zinc txheej ntshiab thiab cov yeeb nkab steel matrix. Yog li ntawd, qhov kub-dip galvanized steel yeeb nkab muaj qhov zoo ntawm cov txheej txheem plating, muaj zog adhesion, thiab lub neej ua haujlwm ntev.
2. Cov yeeb nkab txias galvanized / txias galvanized steel yeeb nkab
Txias galvanized yog electroplating. Tus nqi ntawm galvanizing yog tsawg heev, tsuas yog 10-50g/m2. Nws qhov kev tiv thaiv corrosion nws tus kheej txawv ntau dua li cov kav dej kub-dip galvanized. Txhawm rau kom ntseeg tau qhov zoo, cov tuam txhab tsim cov yeeb nkab galvanized feem ntau tsis siv hauv electroplating (txias galvanized). Tsuas yog cov tuam txhab me me thiab laus-fashioned me siv electroplating, tau kawg, lawv cov nqi kuj pheej yig. Cov zinc txheej thiab steel yeeb nkab matrix ntawm txias galvanized steel kav yog txheej ntawm nws tus kheej. Vim tias cov zinc txheej nyias nyias, cov zinc txheej tsuas yog txuas nrog cov yeeb nkab steel matrix thiab yooj yim poob tawm. Yog li ntawd, corrosion kuj ntawm txias galvanized steel kav yog tsis zoo. Yog li ntawd, nyob rau hauv cov tsev tshiab tsim, cov kav dej txias galvanized steel tau txwv tsis pub ua dej thiab cov kav dej.
