Zonke izinto ezigqunyiweyo zizinzile ngokwe-hydrolytically kwaye ziyahambelana nazo zonke iincindi eziqhelekileyo zokugqiba kakuhle, kubandakanywa negesi yoxinzelelo oluphezulu.Ukukhethwa kwezinto eziphathekayo kusekelwe kwiikhrayitheriya ezahlukeneyo, kubandakanywa ukushisa kwe-bottomhole, ukuqina, ukunyanzeliswa kunye nokukrazula amandla, ukuxutywa kwamanzi kunye nokunyanzeliswa kwegesi, i-oxidation, kunye ne-abrasion kunye nokumelana nemichiza.