Icyuma cya Nickel gifite umutekano muke mu kirere, imbaraga za passivation zikomeye, zirashobora gukora firime yoroheje cyane mu kirere, irashobora kurwanya ruswa ya alkali na acide, kuburyo ibicuruzwa bihagaze neza mubikorwa ndetse nibidukikije bya alkaline, ntibyoroshye guhinduka ibara, gusa okiside hejuru ya 600℃; nikel isahani igizwe na adhesion ikomeye, ntabwo byoroshye kugwa; nikel isahani irashobora gutuma ubuso bwibintu bikomera, birashobora kunoza ibicuruzwa birwanya kwambara hamwe na aside hamwe na alkali irwanya ruswa, ibicuruzwa birwanya kwambara, kwangirika, gukumira ingese ni byiza.