He ʻano mea maka i kapa ʻia (zinc, aluminika) i uhi ʻia ma ka pā kila lōʻihi a haiki o ka ʻōwili anu a i ʻole ka wela.Loaʻa i ka galvanizing wela nā mea maikaʻi o ka uhi ʻana i ka lole, ka adhesion ikaika a me ke ola lawelawe lōʻihi.ʻO ka hopena kino a me ke kemika paʻakikī ma waena o ke kāʻei hao hao wela a me ka hoʻoheheʻe hoʻoheheʻe ʻia e hana i kahi ʻāpana zinc-hao me ka hana paʻa.Hoʻohui pū ʻia ka ʻāpana alloy me ka papa zinc maʻemaʻe a me ka substrate kila.No laila, ikaika kona pale ʻana i ka corrosion.