ISO 17925:2004规定了通过电感耦合等离子体原子发射光谱法或火焰原子吸收光谱法测定钢上锌基和/或铝基涂层一侧表面的重量分析和化学成分来测定单位面积涂层质量的方法。 本方法适用于40%（质量分数）至100%（质量分数）之间的锌含量；铝含量介于0.02%（质量分数）和60%（质量分数）之间；镍含量在7%（质量分数）和20%（质量分数）之间； 铁含量介于0.2%（质量分数）和20%（质量分数）之间；硅含量介于0.2%（质量分数）和10%（质量分数）之间；铅含量介于0005%（质量分数）和2%（质量分数）之间。 这些试验方法旨在作为检验此类材料是否符合国际标准的单位面积质量和成分规范的参考方法。

ISO 17925:2004 specifies methods of determining the coating mass per unit area by gravimetry and chemical composition on one side-surface of zinc- and/or aluminium-based coatings on steel by means of inductively coupled plasma atomic emission spectrometric or flame atomic absorption spectrometry. This method is applicable to zinc contents between 40 % (mass fraction) and 100 % (mass fraction); aluminium contents between 0,02 % (mass fraction) and 60 % (mass fraction); nickel contents between 7 % (mass fraction) and 20 % (mass fraction); iron contents between 0,2 % (mass fraction) and 20 % (mass fraction); silicon contents between 0,2 % (mass fraction) and 10 % (mass fraction); lead contents between 0,005 % (mass fraction) and 2 % (mass fraction). These test methods are intended as referee methods to test such materials for compliance with mass per unit area and compositional specifications of International Standards.