1.1 本试验方法涵盖了确定铁皮或钢板、金属丝和涂层为锌或锌合金（如锌-5）的其他物品上涂层重量[质量]的程序 % 铝（包括锌-5 % 混合稀土铝和锌-5 % 铝-0.1 % 镁）、锌铝镁（包括锌-5至9） % 铝镁和锌-9至13 % 铝镁）或55 % 铝锌。在本试验方法正文中，提及的锌涂层应解释为也包括锌合金涂层，除非另有明确规定。 1.2 单位- 根据与结果进行比较的材料规范中使用的单位，本试验方法确定的最终结果应以英寸-磅单位或国际单位表示。涉及测定试样重量[质量]的程序的某些部分传统上以国际单位制进行，不包括相应的英寸-磅单位。 1.3 对于板材产品，最终结果表示为两侧的涂层总重量[质量]或每侧的涂层重量[质量]，具体取决于规定的要求。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 有关具体危害说明，请参阅 5.1 . 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 本试验方法提供了一种标准方法，用于确定钢铁产品上锌涂层的重量[质量]，并评估此类产品是否符合ASTM A05委员会及其买方在采购订单或合同中指定的小组委员会管辖下的材料规范。 3.1.1 其他ASTM委员会和其他标准编写机构可使用该测试方法进行一致性测试。 3.1.2 测试时的材料条件、采样频率、样本位置和方向、报告要求和其他测试参数包含在相关材料规范或特定产品形式的一般要求规范中。 3.1.3 在铁或钢制品上涂一层锌可以防止腐蚀。由于保护是通过牺牲锌损失提供的，因此保护程度与锌涂层的重量[质量]成比例。 镀锌制品的规范通常提供不同的涂层名称或类别，以便买方可以选择最适合预期应用的涂层重量[质量]。 3.2 本试验方法确定了指定区域内的平均涂层重量[质量]，从中可以计算出平均厚度。本文未描述的其他测试方法可以直接在涂层上的点位置确定厚度；在这种情况下，所需的试验方法在该材料规范中描述，或参考另一适当的试验方法标准。

1.1 This test method covers procedures for determining the weight [mass] of coating on iron or steel sheet, wire, and other articles in which the coating is zinc or a zinc alloy, such as zinc-5 % aluminum (including zinc-5 % aluminum-mischmetal and zinc-5 % aluminum-0.1 % magnesium), zinc-aluminum-magnesium (including zinc-5 to 9 % aluminum-magnesium and zinc-9 to 13 % aluminum-magnesium) or 55 % aluminum-zinc. In the body of this test method, reference to zinc coating shall be interpreted to also include zinc alloy coating except where specifically stated otherwise. 1.2 Units— The final results determined by this test method shall be expressed in inch-pound units or SI units, depending on the units used in the material specification to which the results are to be compared. Certain portions of the procedure involving determination of specimen weight [mass] have traditionally been performed in SI units, and corresponding inch-pound units are not included. 1.3 For sheet products, the final results are expressed as either coating weight [mass] total both sides, or coating weight [mass] separately on each side, depending on the specified requirements. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazards statements, see 5.1 . 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 This test method provides a standard method for determining the weight [mass] of zinc coatings on iron or steel products, and for evaluating conformance of such products to a material specification under the jurisdiction of ASTM Committee A05 and its subcommittees as designated by a purchaser in a purchase order or contract. 3.1.1 This test method may be and is used by other ASTM Committees and other standards writing bodies for the purpose of conformance testing. 3.1.2 The material condition at the time of testing, sampling frequency, specimen location and orientation, reporting requirements, and other test parameters are contained in the pertinent material specification or in a general requirement specification for the particular product form. 3.1.3 A coating of zinc on iron or steel articles provides protection against corrosion. As the protection is provided by sacrificial loss of zinc, the degree of protection is proportional to the weight [mass] of zinc coating. Specifications for zinc-coated articles frequently provide for different designations or classes of coating so that the purchaser can select the coating weight [mass] most suitable for the intended application. 3.2 This test method determines the average coating weight [mass] over a specified area, from which the average thickness can be calculated. Other test methods not described herein can determine the thickness directly at point locations on the coating; in such cases, the required test method is described in that material specification or by reference to another appropriate test method standard.