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现行 ASTM D4212-16(2023)
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Standard Test Method for Viscosity by Dip-Type Viscosity Cups 用浸渍型粘度杯测定粘度的标准试验方法
发布日期: 2023-07-01
1.1 本试验方法包括用浸渍式粘度杯测定涂料、清漆、清漆、油墨和相关液体材料的粘度。该测试方法推荐用于一个工厂或实验室内的粘度控制工作,并且只有在制定了足够的控制措施以确保结果具有足够的可比性时,才应用于检查是否符合规范。 1.2 粘度杯是为测试牛顿和接近牛顿的液体而设计的。如果试验材料是非牛顿的,例如剪切稀化或触变性,则采用另一种方法,如试验方法 D2196 ,应该使用。在受控条件下,比较非牛顿材料的粘度可能会有所帮助,但优选使用受控剪切速率或剪切应力的粘度测定方法。 1.3 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。 1.4 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。 1.5 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 粘度是衡量材料流动性的指标。粘度数据可用于确定涂料和相关流体的搅拌、泵送、浸涂或其他与流动相关的特性的易用性。 5.2 这种类型的杯子用于测量粘度,因为它易于使用,坚固耐用,并且可以用于储罐、储罐和反应器。 5.3 实验室中还有其他类型的测量粘度的仪器,可以提供更好的精度和偏差,包括福特粘度杯(测试方法 D1200 )和旋转粘度计(试验方法 D2196 )。 5.4 某些剪切速率较高的装置,如锥/板粘度计(试验方法 D4287 )提供更多关于可喷涂性、辊涂性和其他高性能的信息- 涂层的剪切速率相关性能。
1.1 This test method covers the determination of viscosity of paints, varnishes, lacquers, inks, and related liquid materials by dip-type viscosity cups. This test method is recommended for viscosity control work within one plant or laboratory and should be used to check compliance with specifications only when sufficient controls have been instituted to ensure adequate comparability of results. 1.2 Viscosity cups are designed for testing of Newtonian and near-Newtonian liquids. If the test material is non-Newtonian, for example, shear-thinning or thixotropic, another method, such as Test Methods D2196 , should be used. Under controlled conditions, comparisons of the viscosity of non-newtonian materials may be helpful, but viscosity determination methods using controlled shear rate or shear stress are preferred. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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. 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 ====== 5.1 Viscosity is a measure of the fluidity of a material. Viscosity data are useful in the determination of the ease of stirring, pumping, dip coating, or other flow-related properties of paints and related fluids. 5.2 This type of cup is used to measure viscosity because it is easy to use, robust, and may be used in tanks, reservoirs, and reactors. 5.3 There are other types of apparatus for measuring viscosity in the laboratory that provide better precision and bias, including the Ford viscosity cup (Test Method D1200 ), and the rotational viscometer (Test Methods D2196 ). 5.4 Certain higher shear rate devices such as cone/plate viscometers (Test Method D4287 ) provide more information about sprayability, roll coatability, and other high-shear rate related properties of coatings.
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归口单位: D01.24
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