ISO 17925-2004 钢上锌和/或铝基涂层.单位面积涂层质量和化学组分的测定.重量分析法、感应耦合等离子体原子辐射光谱测定法和火焰原子吸收光谱测定法

标准号：ISO 17925-2004
中文标准名称：钢上锌和/或铝基涂层.单位面积涂层质量和化学组分的测定.重量分析法、感应耦合等离子体原子辐射光谱测定法和火焰原子吸收光谱测定法
英文标准名称：Zinc and/or aluminium based coatings on steel - Determination of coating mass per unit area and chemical composition - Gravimetry, inductively coupled plasma atomic emission spectrometry and flame atomic absorption spectrometry
标准类型：A29
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：A29
国际标准分类号：25.220.40;77.080.20
适用范围：This International Standard 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. For example, this test method applies for zinc and/or aluminium based coatings on steel such as galvanize (hot dip and electrolytic), galvaneal (hot-dip), zinc-nickel electrolytic, zinc-5 % aluminium coating (hot-dip) and zinc-55 % aluminium coating (hot-dip). Galvanizing gives a pure zinc coating. Galvanealling gives a zinc-iron alloyed coating. Zinc-nickel electrolytic methods give zinc-nickel alloyed coatings. 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). For example, the applicable elements for these products are as follows: galvanizing is specified for iron and aluminium; galvanealling is specified for zinc, iron and aluminium; zinc-nickel electrolytic methods are specified for zinc, iron and nickel; zinc-5 % aluminium coating is specified for zinc, iron, aluminium and silicon; zinc-55 % aluminium is specified for zinc, iron, aluminium and silicon. FAAS determination for the chemical composition of a coating layer is not applicable for zinc. 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.