1.1 本试验方法涵盖了使用热重分析仪试验（TGA）测定润滑油Noack蒸发损失的程序。该测试方法适用于基础油和完全配制的润滑油，其Noack蒸发损失范围为0-30质量%。该程序需要更小的样品，并且当顺序分析多个样品时速度更快，并且比使用伍德金属的标准Noack方法更安全。 1.2 通过该测试方法测定的蒸发损失与使用标准Noack测试方法测定的蒸发损失相同。 1.3 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 该测试方法是测定润滑剂Noack蒸发损失的安全且快速的替代方法。 5.2 润滑剂的蒸发损失在设备的热区中是重要的，其中部分润滑剂的蒸发可能增加润滑剂的消耗。 5.3 一些润滑剂规格引用了最大允许蒸发损失。

1.1 This test method covers the procedure for determining the Noack evaporation loss of lubricating oils using a thermogravimetric analyzer test (TGA). The test method is applicable to base stocks and fully formulated lubricant oils having a Noack evaporative loss ranging from 0 % to 30 % by mass. This procedure requires much smaller specimens, and is faster when multiple samples are sequentially analyzed, and safer than the standard Noack method using Wood's metal. 1.2 The evaporative loss determined by this test method is the same as that determined using the standard Noack test methods. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 This test method is a safe and fast alternative for determination of the Noack evaporation loss of a lubricant. 5.2 The evaporation loss of a lubricant is important in the hot zones of equipment where evaporation of part of the lubricant may increase lubricant consumption. 5.3 Some lubricant specifications cite a maximum allowable evaporative loss.