62. magnesium nyob rau hauv molten zinc cuam tshuam li cas kub -dip galvanizing?

Magnesium (Mg), ib tug silvery - dawb lub caij nrog ib tug hexagonal siv lead ua qauv, muaj ib tug txheeb ze atomic mass ntawm 24.32, melting point ntawm 650 degree, thiab boiling point ntawm 1120 degree. Kev sib koom ua ke ntawm magnesium rau hauv zinc ua kom muaj kev tiv thaiv corrosion, nrog rau cov kab mob (0.024-0.084%) ua pov thawj zoo. Txawm li cas los xij, ntawm 0.3-0.5% concentration, magnesium ua rau cov zinc txheej kom thicken thiab roughen, tsim ib tug milky-dawb tsos thaum nce thermal conductivity thiab txo adhesion. Tshaj li 0.6% concentration, lub txheej yuav thinner. Thaum lub sij hawm zinc oxidation, magnesium txhawb kev tsim ntawm magnesium oxide, uas yooj yim hloov oxygen mus rau zinc dua zinc ncaj qha los ntawm huab cua. Magnesium feem ntau tsis suav nrog zinc-coated steel kav rau dej thiab roj kis tau tus mob tshwj tsis yog hauv daim ntawv thov tshwj xeeb.