28. Dab tsi yog qhov tseem ceeb uas txiav txim siab qhov corrosion ntawm zinc txheej?

Tus nqi corrosion ntawm zinc coatings txawv nyob ntawm seb cov khoom ntawm zinc ntsev (corrosion khoom) tsim rau saum npoo nyob rau hauv ntau yam kev mob. Thaum zinc ntsev zoo li zinc hydroxide tsis zoo soluble hauv cov tshuaj corrosive, lawv tuaj yeem tiv thaiv cov txheej zinc hauv qab. Piv txwv li, yog hais tias cov zinc generated ntsev yog soluble heev, lawv yuav tsis muab kev tiv thaiv txaus, ua rau kom ceev corrosion.
Yog li ntawd, cov ntsiab lus tseem ceeb uas ua rau muaj kev txhim kho corrosion muaj xws li: siab sulfur cov ntsiab lus nyob rau hauv cov huab cua, cov av noo ntau dhau, cov khoom siv ntau dhau xws li plua plav, nag xob nag cua, thiab cov pa oxygen siab hauv cov kua dej ntawm cov zinc txheej, nrog tus nqi pH ntawm 1 txog 6 thiab 12.5-14.5. Cov impurities nyob rau hauv zinc txheej feem ntau tsis tshua muaj tshwm sim nyob rau hauv atmospheric tej yam kev mob, tab sis lawv leeb lub corrosion ntawm zinc txheej nyob rau hauv muaj zog acidic daws vim yog tsim ntawm micro-batteries. Hauv kev daws teeb meem alkaline muaj zog, tus nqi corrosion ntawm zinc txheej kuj nce.