25. Yuav ua li cas cov zinc txheej corrode ntawm lub tsev?

Lub corrosion ntawm zinc coatings ntawm lub tsev yog txiav txim los ntawm cov khoom ntawm cov khoom siv. Piv txwv li, cov cement thiab txiv qaub slurry muaj cov alkalinity siab, uas ua rau cov zinc txheej ntau heev. Thaum lub sij hawm ziab, evaporated noo noo condenses ntawm zinc nto thaum oxygen- huab cua nplua nuj tau qhia, tsim kom muaj oxygen- ib puag ncig dawb uas ua rau muaj kev xeb. Magnesium chloride nyob rau hauv cov cement ntxiv ua kom muaj zog corrosion los ntawm kev cuam tshuam cov yeeb yaj kiab tiv thaiv. Ru tsev asphalt, thaum raug tshav ntuj, tsim cov organic acids uas, thaum sib cuag nrog dej nag, ua rau muaj kev xeb loj heev.
Cov yeeb nkab steel galvanized siv rau kev thauj cov dej kub thiab chav dej feem ntau yog qhwv nrog ib txheej ntawm cov khoom siv rwb thaiv tsev. Yog tias cov dej noo hauv cov khoom siv rwb thaiv tsev tsis yooj yim evaporated, nws tuaj yeem yooj yim ua rau corrosion. Piv txwv li, yog tias slag wool yog siv los ua cov khoom siv rwb thaiv tsev, nws tsis tsuas yog muaj qee qhov dej noo xwb tab sis kuj sulfides, uas ua rau lub zog corrosion ntawm zinc txheej.