Simbi yakavharwa nezinc kubatsira kudzivirira ngura.Zinc inopindirana neoxygen kana yaiswa mumhepo, ichiita zinc oxide iyo inowedzera kusangana necarbon dioxide kuumba zinc carbonate.Iyo inomisa kuwedzera kuora mumamiriro ezvinhu akawanda, kudzivirira simbi kubva kune zvinhu.
Isu tinopa akasiyana-siyana akavharidzirwa simbi pepa uye coil zvigadzirwa, zvinosanganisira inopisa-yakanyudzwa, electro galvanized, aluminized,galvannealeduye galvalume.