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现行 ASTM B490-09(2021)
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Standard Practice for Micrometer Bend Test for Ductility of Electrodeposits 电沉积延展性微米弯曲试验的标准实践
发布日期: 2021-04-01
1.1 本规程描述了测量电沉积箔延展性的程序。 2. 1.2 本规程仅适用于评估延展性低的电镀层。 1.3 由于该测试具有显著的操作员依赖性,因此必须将获得的延性值视为半定量。 1.4 这种做法最适用于内部过程控制,其中测量总是由同一个操作员进行。延展性值的变化可作为电镀溶液中可能变化的指示。 1.5 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。 1.6 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。 1.7 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 本规程可作为控制某些电镀溶液的一种方法。它用于指示存在污染或其他一些不利条件。 4.2 当电镀零件承受中等应力时,例如将电镀保险杠栓接到汽车上时,或当暴露在大范围的波动温度(热冲击)下时,延展性测量具有特殊价值。
1.1 This practice describes a procedure for measuring the ductility of electrodeposited foils. 2 1.2 This practice is suitable only for the evaluation of electrodeposits having low ductility. 1.3 The obtained ductility values must only be considered semi-quantitative because this test has a significant operator dependence. 1.4 This practice is best used for in-house process control where measurements are always made by the same operator. A change in ductility value can be used as an indication of possible changes in the electroplating solution. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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 This practice is useful as one method of controlling some electroplating solutions. It serves to indicate the presence of contamination or some other adverse condition. 4.2 Ductility measurements are of particular value when electroplated parts are to be subjected to moderate stress such as that involved in bolting an electroplated bumper to an automobile or when exposed to a wide range of fluctuating temperatures (thermal shock).
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归口单位: B08.10
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