Galvanized kav yog cov kav dej hlau uas tau muab pov tseg rau hauv kev tiv thaiv zinc txheej tiv thaiv kom txhob muaj corrosion thiab xeb. Galvanized piping feem ntau ntsia tau rau hauv vaj tse ua ntej xyoo 1960. Thaum nws tau tsim, cov yeeb nkab yeeb nkab yog lwm txoj hau kev txhuas cov kav dej. Niaj hnub no, txawm li cas los xij, peb tau kawm tias xyoo dhau los ntawm kev kis dej yuav ua rau cov kav dej xos tau ua kom khov thiab xeb ntawm sab hauv.
Dab tsi yog cov kav dej txhaws tau zoo li cas?
Thaum xub thawj ntsia, kav xa hluav taws xob zoo li cov xim nickel hauv xim. Tab sis raws li nws muaj hnub nyoog, cov yeeb nkab yuav tau tuaj sab nraud, khuab, lossis ib tsos tsaus tsawv, nyob ntawm nws qhov chaw. Peb kuj tau pom cov tsev nyob qhov twg cov kav dej tau pleev xim rau, yog li nws yuav tsis yooj yim qhia thawj zaug.
