Ob leeg luam yeeb hlau thiab cov pa roj carbon dioxide tshooj yog siv hauv dej kev lag luam rau ntau hom kev siv.
Thaum muaj nyob rau hauv ib lub hlau hlau, carbon ua rau cov tawv nyuab heev. Qhov feem pua ntawm cov roj siv me me nws txawv nyob ntawm daim ntawv thov. Qhov siab dua qhov feem pua ntawm cov paib, qhov nyuaj thiab tsis yoojyim rau cov hlau yuav yog. Vim hais tias me ntsis hlau yog ib qho uas tsis tshua muaj carbon, nws khaws ntau yooj yooj yim dua cov hlau thaum tseem tab tom khov kho.
Ordinarily, hlau yog heev prone rau xeb thiab corrosion. Vim tias nws cov lus muaj pes tsawg leeg, cov hlau luam yeeb yog ob qho yooj yim dua thiab muaj zog tiv thaiv dua lwm hom hlau yeeb nkab . Nyob rau hauv cov hlau luam yeeb, cov graphite cov ntaub ntawv kheej kheej nodules siv cov flakes uas pom nyob rau hauv cov nplaum hlau. Qhov kev zoo nkauj no muab cov qauv ruaj khov rau cov hlau, hindering tsim cov kab nrawm thiab kev txhim kho kev lag luam (yooj yim). Ameslikas, hlau luam yog tsim rau kev siv roj ua lag luam, tab sis nws kuj yog siv hauv dej kev lag luam.
Underground ductile hlau yeeb nkab yuav kav ntev tshaj 100 xyoo yog tias tsim thiab txhim kho. Ib qho khoom tshwj xeeb ntawm cov yeeb nkab yeeb nkab yog tias nws lub cev nqaij daim tawv tsis hloov lub sijhawm. Muab cov yeeb nkab no tsis muab tso rau hauv qab ntau tshaj qhov nws yog tsim los ua haujlwm, kev txhawj xeeb yog txoj kev hem thawj rau lub yeeb nkab pab lub neej.
