Tydị ha gụnyere nkuchi, mkpụrụ osisi, hex dome posh, sụks, studs, studs, studs, studs, studs, studs, studs, studs okpu mkpuchi skro. Itinye na corrosion nke klas 321 Bolts nwere ike ime na gburugburu chloride nwere ike ime, ebe nrụgide corrosion nwere ike ime karịa 60 ogo Celsius.