This standard applies to electrodeposited zinc and zinc-alloy coatings on iron and steel with Cr(VI)-free passivation. The zinc-alloy coatings contain nickel or iron as alloying elements (referred to as zinc/nickel and zinc/iron coatings, respectively). The main purpose of the coatings or coating systems is protecting iron and steel components against corrosion. This standard specifies ¾ð the designations to be used for the above coating systems, ¾ð minimum corrosion resistance to be achieved in specified test procedures and ¾ð the minimum coating thicknesses required.