1.1 本规程描述了通过显微镜观察涂层中的精确角度切口来测量涂层的干膜厚度。使用这些程序可能需要修复涂层。本规程旨在补充制造商关于仪表手动操作的说明，而不是取代这些说明。它包括关键术语的定义、参考文件、实践的意义和用途以及工具的优点和局限性。 1.2 提供了三种测量保护涂层系统干膜厚度的程序: 1.2.1 程序A- 使用坡口切割工具。 1.2.2 程序B- 使用研磨仪器。 1.2.3 程序C- 使用钻头仪器。 1.3 这些程序不适用于可能在测试量规切割尖端下变形的软质或韧性基底。基材应足够坚硬，以防止涂层在切割过程中变形。 表面可能平坦或适度弯曲。小至25毫米（1英寸）的管道直径可以在轴向上测量。 1.4 多涂层系统中的单个涂层，其中涂层之间存在明显的视觉差异或涂层系统的总厚度可以通过这些程序测量。 1.5 厚度测量范围通常为2至2000微米（0.1至80密耳），并取决于刀片的切割角度。 1.6 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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====== 5.1 许多涂层性能明显受干膜厚度的影响，如附着力、柔韧性和硬度。为了能够比较不同操作员获得的结果，必须仔细测量膜厚度。 5.2 大多数保护性和高性能涂层的应用都是为了满足每层涂层干膜厚度的要求或规范，或整个系统的要求或规范，或两者兼而有之。涂层必须在一定的最小和最大厚度公差范围内涂覆，以实现其预期功能。

1.1 This practice describes the measurement of dry film thickness of coating films by microscopic observation of precision angular cuts in the coating film. Use of these procedures may require repair of the coating film. This practice is intended to supplement the manufacturers' instructions for the manual operation of the gages and is not intended to replace them. It includes definitions of key terms, reference documents, the significance and use of the practice, and the advantages and limitations of the instruments. 1.2 Three procedures are provided for measuring dry film thickness of protective coating systems: 1.2.1 Procedure A— Using groove cutting instruments. 1.2.2 Procedure B— Using grinding instruments. 1.2.3 Procedure C— Using drill bit instruments. 1.3 These procedures are not applicable for soft or ductile substrates that may deform under the test gage cutting tip. The substrate should be sufficiently rigid to prevent deformation of the coating during the cutting process. The surface may be flat or moderately curved. Pipes as small as 25 mm (1 in.) in diameter may be measured in the axial direction. 1.4 Individual coats in a multicoat system where there is a discernible visual difference between coats or the overall thickness of a coating system can be measured by these procedures. 1.5 The range of thickness measurement is typically 2 to 2000 microns (0.1 to 80 mils) and depends upon the cutting angle of the blade. 1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 ====== 5.1 Many coating properties are markedly affected by the film thickness of the dry film such as adhesion, flexibility, and harness. To be able to compare results obtained by different operators, it is essential to measure film thickness carefully. 5.2 Most protective and high performance coatings are applied to meet a requirement or a specification for the dry-film thickness of each coat, or for the complete system, or both. Coatings must be applied within a certain minimum and maximum thickness tolerances in order that they can fulfill their intended function.