19. Vim li cas zinc txheej corrode sai dua nyob rau hauv sulfur uas muaj huab cua?

Hauv cov nroog uas muaj cov pa roj flue ntau, cov huab cua muaj cov sulfur dioxide thiab cov khoom siv ntau heev, suav nrog 30% insoluble residues, 33% charred fuel residues, 20% iron oxides, and 8% water-soluble sulfates. Thaum cov dej nag absorbs sulfur dioxide, nws dhau los ua acidic, ua rau corrosion hnyav rau zinc txheej. Txawm hais tias cov txheej txheem tiv thaiv zinc oxide, zinc hydroxide, thiab zinc carbonate daim ntawv nyob rau saum npoo, cov no tseem tuaj yeem yaj mus rau hauv cov zinc sulfate soluble hauv cov kua qaub acidic, ua kom corrosion. Yog li ntawd, tus nqi corrosion ntawm zinc coatings yog ze li ntawm ncaj qha proportional rau sulfur dioxide concentration nyob rau hauv cov huab cua.
Cov khoom siv kuj tuaj yeem ua rau thaj tsam corrosion ntawm zinc txheej txheej. Qee cov khoom siv no yog hygroscopic, uas tuaj yeem nqus dej noo thiab yaj cov tshuaj sulfur rau hauv cov kua qaub, ua rau corrosion ntawm zinc txheej ntawm qhov chaw ntawd. Tus nqi corrosion ntawm zinc coatings nyob rau hauv sulfur- muaj cov huab cua ua lag luam feem ntau nyob ib ncig ntawm 420 txog 770 milligrams ib square decimeter ib xyoos twg.