Raws li ib txwm muaj, cov hlau galvanized tsis sib npaug. Qhov tseeb, txheej txheej galvanized yog corroded ua ntej nyob rau hauv qhov chaw uas cov txheej thiab substrate tsis zoo sib koom ua ke, ua rau muaj kev xeb loj hauv zos. Thiab thaum kawg, ob lub zinc txheej thiab substrate yog xeb. Los ntawm qhov kev pom no, qhov adhesion ntawm zinc txheej yog qhov tseem ceeb tshaj qhov tuab ntawm zinc txheej. Yog li ntawd, nws yog ib qho tseem ceeb los xaiv ib tug txhim khu kev qha galvanized ntawv chaw tsim tshuaj paus.
Rusting txheej txheem ntawm galvanized hlau
Qhov corrosion ntawm galvanized steel pib los ntawm oxidation ntawm zinc txheej, uas yuav tsim ib txheej ntawm grey-dawb hmoov. Qhov ntawd yog hu ua "dawb xeb". Tom qab ntawd cov xeb dawb ntxiv reacts nrog impurity gases xws li cov pa roj carbon dioxide nyob rau hauv cov huab cua ntub los tsim cov pob dub, uas yog hu ua "dub xeb". Nyob rau tib lub sijhawm, zinc txheej yog corroded me ntsis. Thaum cov zinc txheej tas lawm, lub hauv paus hlau poob cov zinc tiv thaiv txheej thiab pib oxidize, ua rau "liab xeb". Thaum "liab xeb" tshwm sim, qhov corrosion yuav sai heev. Kom txog rau thaum lub substrate yog xeb, galvanized steel yuav xaus nws cov kev pab cuam lub neej.
Dub
Tsis tas li ntawd, muaj ob qho kev tiv thaiv corrosion hu ua blackening. Tom qab cov ntawv galvanized tau siv rau lub sijhawm, nyob rau hauv kev cuam tshuam ntawm cov ntsiab lus xws li txhuas hauv zinc txheej, qhov dull ntawm spangles yuav tig dub. Blackened zinc txheej tseem muaj kev tiv thaiv zoo ntawm lub hauv paus hlau, tab sis nws muaj qee yam cuam tshuam rau lub neej kev pab cuam.
Galvanized ntawv yuav raug kev txom nyem los ntawm blackening corrosion thaum thauj. Vim yog qhov me me coiling nro, cov hlau coil txheej yog xoob, thiab qhov chaw ntawm galvanized coil hu rau cov ntoo pallets yuav rub tawm ib leeg thiab ua rau oxidation. Tom qab cov dawb oxide yog rub tawm, cov pob dub tshwm rau ntawm qhov chawgalvanized ntawv. Nyob rau hauv cov ntaub ntawv no, cov zaj duab xis passivation yuav puas thiab galvanized txheej yuav thinned. Tsuas yog rau qhov tsis xws luag, lub neej ntawm daim ntawv galvanized yuav raug txo kom tsawg.
Cov lus qhia rau xaiv cov khoom siv Galvanized
Lub hom phiaj tseem ceeb ntawm galvanizing yog cais cov corrosive nruab nrab ntawm lub substrate. Yog li ntawd, lub compactness, kev ncaj ncees, thiab zoo adhesion ntawm zinc txheej yuav cuam tshuam rau corrosion kuj ntawm galvanized ntawv.
GI yog cov khoom siv dav siv hauv kev tsim kho, khoom siv hauv tsev, tsheb, thiab lwm yam lag luam. Nws kuj yog siv los ua substrate rauxim-coated nplooj ntawv. Thaum tseem muaj lwm cov coatings nrog zoo corrosion kuj, xws li GL, ZAM, uas yuav siv tau nyob rau hauv hnyav corrosive ib puag ncig thiab marine climates.