1.1 本试验方法涵盖了使用悬臂（梁）法测量有机涂层内应力的程序。 1.2 该方法适用于基材弹性模量显著大于涂层弹性模量（Ec）且基材厚度显著大于涂层厚度的涂层（见 附注7 和 附注8 ). 1.3 应力值受涂层与基材的附着力值和涂层的抗拉强度或两者的限制。 1.4 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。 1.5 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制定适当的安全、健康和环境实践，并在使用前确定监管限制的适用性。 1.6 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 如果涂层粘附在其基材上阻止了预期的移动，则涂层中的应力会因其收缩或膨胀而产生。 5.2 导致涂层中出现应力的原因有几个:成膜（交联、溶剂蒸发等）；涂层和基材之间的热膨胀系数差异；湿度和吸水率；环境影响（紫外线辐射、温度和湿度）和其他。 5.3 了解涂层内应力非常重要，因为它们可能会影响涂层性能和使用寿命。 如果内应力超过薄膜的抗拉强度，则会形成裂纹。如果应力超过涂层和基材之间的附着力，则会降低附着力，并可能导致涂层分层。关于涂层中应力的定量信息可用于涂层配方及其应用和使用建议。 5.4 已发现该方法适用于风干工业有机涂层，但尚未评估薄涂层（厚度<0.0254 mm（.001 in.）的适用性，用于粉末和热固化涂料。

1.1 This test method covers the procedure for measurements of internal stresses in organic coatings by using the cantilever (beam) method. 1.2 This method is appropriate for the coatings for which the modulus of elasticity of substrate (Es) is significantly greater than the modulus of elasticity of coating (Ec) and for which the thickness of substrate is significantly greater than thickness of coating (see Note 7 and Note 8 ). 1.3 The stress values are limited by the adhesion values of coating to the substrate and by the tensile strength of the coating, or both. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 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 to determine the applicability of regulatory limitations prior to use. 1.6 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 Stresses in coatings arise as a result of their shrinkage or expansion if expected movements are prevented by coating adhesion to its substrate. 5.2 There are several causes leading to arrival of stresses in the coatings: film formation (cross-linking, solvent evaporation, etc.); differences in thermal expansion coefficients between coating and substrate; humidity and water absorption; environmental effects (ultraviolet radiation, temperature and humidity), and others. 5.3 Knowledge of the internal stresses in coatings is very important because they may effect coating performance and service life. If the internal stress exceeds the tensile strength of the film, cracks are formed. If stress exceeds adhesion between coating and substrate, it will reduce adhesion and can lead to delamination of coatings. Quantitative information about stresses in coatings can be useful in coating formulation and recommendations for their application and use. 5.4 This method has been found useful for air-dry industrial organic coatings but the applicability has not yet been assessed for thin coatings (thickness <0.0254 mm (.001 in.), for powder and thermally-cured coatings.