61. Yuav ua li cas aluminium-zinc-muaj thiab txhuas-zinc- cov kua dawb sib txawv hauv lawv cov teebmeem corrosion ntawm hlau?

Thaum cov kav hlau tau muab tso rau hauv zinc rau lub sijhawm luv luv, tus nqi corrosion nyob rau hauv aluminium -dawb galvanized pots yog kwv yees li 7-9 npaug sai dua li nyob rau hauv txhuas-muaj galvanized pots. Txawm li cas los xij, thaum lub sij hawm zinc immersion ntau tshaj 8 feeb, tus nqi corrosion nyob rau hauv aluminium -muaj galvanized pots ua siab tshaj nyob rau hauv aluminium-dawb sawv daws yuav. Thaum lub qub yog qhov zoo rau kev ceev zinc immersion los txhawb kev tsim khoom, qhov tom kawg tuaj yeem cuam tshuam rau cov lauj kaub galvanized. Nyob rau hauv cov kev siv ntawm aluminium-muaj galvanized lauj kaub, nws tau pom tias cov corrosion pits tsim nyob rau hauv galvanized steel daim hlau nyob rau hauv zinc kua theem yog ho tob.