Ukuthethelelwa okukhulu, ngenxa yosayizi wazo omkhulu, izinqubo eziningi, umjikelezo omude, ongelona iqiniso kule nqubo, futhi izinto eziningi ezingazinzile, zivame ukufana ngokungalingani kokuhlolwa kwempahla, ukuze zingakwazi ukuphumelela ekuhlolweni kwempahla emishini, ukubonwa kwe-metallographic kanye nokutholwa kwe-floctictic ne-factical dection.

Ngenxa yokwahlukaniswa kokwakheka kwamakhemikhali, ukunqwabelana okufakiwe kanye nezinkinga ezahlukahlukene ze-pore ku-Ingot;
Lapho ukufudumeza, izinga lokushisa lishintsha kancane, ukusatshalaliswa akulingani, ukucindezelwa kwangaphakathi kukhulu, isici siningi;
Ukushisa okuphezulu nesikhathi eside kwakha, ukucindezelwa kwasendaweni kanye nokonakaliswa kwendawo, isimo sokugeleza kwepulasitiki, ukwakhiwa kwezingalo, ukusatshalaliswa kwezezimali kuhluke kakhulu;
Ngesikhathi sokupholisa, inqubo yokuphazamiseka ihamba kancane, ukuguqulwa kwezicubu kuyinkimbinkimbi futhi ukucindezelwa okwengeziwe kukhulu.
Zonke lezi zinto ezingenhla zingahle ziholele ku-inhomogeneity emibi yokusebenza kwezicubu kanye nekhwalithi engafaneleki.
Izinyathelo zokuthuthukisa ukufana kweukuthethelelwa okukhulu:
1. Amukelise ubuchwepheshe obuthuthukile bokuncoma ukuthuthukisa ikhwalithi yensimbi ye-Inot yensimbi;
2