Uru: na-enye ezigbo nguzozi nke ?d? ?n? ah?a na omume eletriki. ? d? ?k? na ibu ma e jiri ya t?nyere ?la k?pa, nke nwere ike ?ba uru na ?f?d? ngwa.
?d?mma: Na-enwe ike corrosion ma nwee ihe na-eme nke ?ma kar?a ?la k?pa. O nwekwara ike ?ch? ihe nchebe ?z? iji gbochie oxidition.
Udi ubi: Jiri ya na eriri nnyefe ike, nt?ghar?, na ikuku moto ebe ibu na-at?le.