He mea i hana ʻia e ke kaʻina hana galvanizing wela wela me ka ʻili kila wela a i ʻole ka mea hao i ʻōwili ʻia e like me ka substrate.ʻO ka pepa galvanized wela i hoʻolako ʻia e ka pā ʻehā ma hope o ke ʻoki ʻana;Hoʻolako ʻia ke ʻano wili wela ma hope o ka wili ʻana.No laila, hiki ke hoʻokaʻawale ʻia nā pale kila i loko o nā ʻāpana kila wela a me nā ʻāpana kila wela wela, ka mea i hoʻohana nui ʻia i nā ʻano hana, nā mea hana hale, nā kaʻa, nā ipu, ka lawe ʻana a me ka ʻoihana hale.ʻOi aku i ka hana ʻana i ke kila, ka hana kaʻa, ka hale kūʻai kila a me nā ʻoihana ʻē aʻe.ʻO kā lākou mau hiʻohiʻona nui: ke kūpaʻa corrosion ikaika, ka maikaʻi o ka ʻili maikaʻi, ka pōmaikaʻi mai ka hana hohonu, ka waiwai a me ka hana.