1.1 本指南概述了通过重量分析和其他化学分析程序测定电沉积、化学沉积、机械沉积、真空沉积、阳极氧化和化学转化涂层单位面积质量的一般方法。 1.2 本指南确定了测量区域内单位面积的平均质量。 1.3 所引用的剥离方法在规范或公开文献中有描述，或至少有一个实验室常规使用过。 1.4 概述的程序可用于多种涂层-基材组合。当涂层不能通过化学或物理方法从基材上分离时，不能使用它们，如果白黄铜镀上黄色黄铜，则会出现这种情况。 1.5 原则上，这些程序可用于测量非常薄的涂层或测量小面积上的涂层，但不能测量小面积上的薄涂层。限制取决于所需的精度。例如，2.5 毫克/厘米 2. 涂层厚度可能需要2.5 涂层覆盖1 mg 厘米 2. ，但为0.1 毫克/厘米 2. 涂层厚度需要25 厘米 2. 获得2.5 mg涂层。 1.6 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.7 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。 1.8 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====== 4.1 涂层的厚度对其性能至关重要，在许多要求涂层的规范中都有规定。 4.2 这些程序用于验收测试，并出现在一些规范中。 4.3 涂层测厚仪通常使用基于质量和面积测量的厚度标准进行校准。 4.4 只有在涂层材料密度已知的情况下，才可以根据其单位面积质量计算测量区域上涂层的平均厚度。

1.1 This guide outlines a general method for determining the mass per unit area of electrodeposited, electroless, mechanically-deposited, vacuum-deposited, anodicoxide, and chemical conversion coatings by gravimetric and other chemical analysis procedures. 1.2 This guide determines the average mass per unit area over a measured area. 1.3 The stripping methods cited are described in specifications or in the open literature or have been used routinely by at least one laboratory. 1.4 The procedures outlined can be used for many coating-substrate combinations. They cannot be used where the coating cannot be separated from the substrate by chemical or physical means as would be the case if white brass were plated with yellow brass. 1.5 In principle, these procedures can be used to measure very thin coatings or to measure coatings over small areas, but not thin coatings over small areas. The limits depend on the required accuracy. For example, 2.5 mg/cm 2 of coating might require 2.5 mg of coating covering 1 cm 2 , but 0.1 mg/cm 2 of coating would require 25 cm 2 to obtain 2.5 mg of coating. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. 1.8 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 ====== 4.1 The thickness of a coating is critical to its performance and is specified in many specifications calling for coatings. 4.2 These procedures are used for acceptance testing and appear in a few specifications. 4.3 Coating thickness instruments are often calibrated with thickness standards that are based on mass and area measurements. 4.4 The average thickness of a coating on the measured area can be calculated from its mass per unit area only if the density of the coating material is known.