Yuav ua li cas Thickness ntawm zinc txheej cuam tshuam rau corrosion tsis kam ntawm Q345 txias- rolled galvanized steel?
Lub thickness ntawm zinc txheej ntawm q345 txias- rolled steel yog qhov tseem ceeb hauv kev txiav txim siab nws corrosion tsis kam. Qhov ob qhia tau qhov tseem ceeb ntawm kev sib txheeb, tab sis cov nyhuv zoo tsis yog qhov teeb meem ntawm "doubling lub thickness txhais tau hais tias doubling distoristance." Nws yuav tsum raug txiav txim siab ua ke nrog cov txheej txheem galvanizing, kev thov ib puag ncig, thiab lwm yam. Cov txheej txheem tshwj xeeb thiab cov qauv ntawm cov cawv muaj raws li hauv qab no:
1. Cov hauv paus tseem ceeb: Zinc tsho tuab tuab txiav txim siab lub zog "lub cev muaj zog"
Lub corrosion tiv thaiv muab los ntawm Galvanized txheej ntawm Q345 txias {1} Kev cais tawm ntawm lub cev muaj huab cua xws li cov hlau, tsis nyiam cov hlau, tsis ncaj ncees tiv thaiv cov hlau). Lub thickness ntawm zinc txheej ncaj qha txiav txim ncaj qha lub sijhawm ntawm ob qho kev tiv thaiv no:
Lub zog ntawm lub cev thaiv cov nyhuv
Cov txheej zinc tuab tuab ua cov txheej txheem ua kom tiav thiab denser "yooj yim qeeb ntawm cov dej nag (xws li cov dej nag, thiab ntsev) rau hauv cov steel substrate. Yog tias cov txheej zinc txheej dhau heev (piv txwv li, txias - dip galvanizing<5μm), tiny pinholes and scratches from the production process may cause "localized missed coating," allowing the corrosive media to directly contact the steel, leading to substrate corrosion within a short period of time (several months to a year).
Yog hais tias lub zinc txheej yog thicker (piv txwv li, kub- remending lub sijhawm nws yuav txuas ntxiv mus rau lub xyoo pua
Lub sijhawm ntawm kev tiv thaiv kev txi anodicial
Lub zinc txheej maj mam yaj (piv txwv li, "kev fij") nws tus kheej nyob rau hauv ib puag ncig corrosive, thiab kev sib cais yog qhov sib txawv nrog cov tuab ntawm zinc txheej.
Piv txwv li, hauv cov huab cua raug, nruab nrab ntawm qhov ntsuas ntawm zinc yog kwv yees li 1 - 3m / xyoo. Lub zinc txheej nrog ib tuab ntawm 10μm (txias-dip galvanizing) theoretically muab kev tiv thaiv fij rau tsuas yog 3-10 xyoo.
Lub zinc txheej nrog ib qho tuab ntawm 80μm (kub-}} dip txheej kom txog thaum lub zinc txheej tag nrho.