ʻO ka pepa galvalume i uhiʻia ke kala he mea hale i hanaʻia iʻekolu-layer composite material, me ka substrate, zinc-aluminium alloy coating a me organic coating.After surface degreasing, phosphating a me ka paʻakai paʻakai paʻakikī, ua uhiʻia me ka'ōpala a me ka baed.He hiʻohiʻona palahalaha a nani ka hiʻohiʻona, ke kaumaha māmā, ka pale ʻana i ka corrosion, ke ola lōʻihi, ka maikaʻi o ka hoʻokō ʻana i ka wela, hoʻohana nui ʻia i ke kūkulu ʻana, ka lawe ʻana, ka mana uila, nā mea hana hale a me nā māla ʻē aʻe.