1.1 这些试验方法包括测定各种液体材料的表面张力和界面张力，包括但不限于术语中定义的油漆、溶剂和表面活性剂溶液 D459 .包括以下四种方法: 方法A——杜诺伊环的表面张力； 方法B——杜诺伊环的界面张力； 方法C——Wilhelmy板的表面张力；和 方法D——Wilhelmy板的界面张力。 1.2 方法A最初主要用于表面活性剂的水溶液，但也适用于水性涂料、非水溶液（包括涂料）和混合溶剂溶液。 1.3 方法B适用于两个- 阶段解决方案。可以存在不止一种溶质组分，包括本身不具有表面活性的溶质组分。 1.4 方法C适用于表面活性液体，与杜诺伊环不同，不需要浮力校正，结果不受液体中等粘度（1-10帕秒）的影响。这是用于油漆和树脂溶液的推荐方法。 1.5 方法D适用于两相溶液和混合物。 1.6 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.7 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 可提供试剂和材料的材料安全数据表。在使用前对其进行危险性审查。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 这些方法提供的数据可用于评估表面活性剂在降低表面张力方面的有效性。此外，表面张力数据可以预测液体与固体表面或其他液体之间的相互作用，并可用于建立油漆、溶剂和其他液体的润湿特性。 5.2 许多实验室发现，Wilhelmy板更容易使用，更容易清洁，通常更适合与有色涂料一起使用。

1.1 These test methods cover the determination of surface tension and interfacial tension of a variety of liquid materials, including but not restricted to paints, solvents, and solutions of surface-active agents, as defined in Terminology D459 . Four methods are covered as follows: Method A—Surface Tension by du Noüy ring; Method B—Interfacial Tension by du Noüy ring; Method C—Surface Tension by Wilhelmy plate; and Method D—Interfacial Tension by Wilhelmy plate. 1.2 Method A originally was written primarily to cover aqueous solutions of surface-active agents, but is also applicable to aqueous paints, nonaqueous solutions (including paints) and mixed solvent solutions. 1.3 Method B is applicable to two-phase solutions. More than one solute component may be present, including solute components that are not in themselves surface-active. 1.4 Method C is applicable to surface active liquids and, unlike du Noüy ring, no buoyancy corrections are needed and results are not affected by moderate viscosities (1-10 Pa-sec) of the liquid. It is the recommended method for use with paints and resin solutions. 1.5 Method D is applicable to two-phase solutions and mixtures. 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. Material Safety Data Sheets are available for reagents and materials. Review them for hazards prior to usage. 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 These methods provide data that are useful in evaluating the effectiveness of surface active agents in reducing surface tension. In addition, surface tension data can predict interactions between liquids and solid surfaces or other liquids and can be used to establish wetting properties of paints, solvents, and other liquids. 5.2 A number of laboratories have found the Wilhelmy plate to be easier to use, easier to clean and generally better for use with pigmented paints.