1.1 本试验方法包括烃基润滑油热稳定性的评估，尽管在试验过程中可能发生氧化。 1.2 以国际单位表示的值应视为标准值。 1.2.1 例外情况- 括号中给出的值仅供参考。 1.3 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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 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》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 热稳定性表征了可能对润滑性能产生不利影响的物理和化学性质变化。本试验方法评估了在100 °C。沉积物和棒颜色是评估标准。尚未将测试与现场服务进行关联。 5.2 本试验方法旨在用于评定一种润滑油的质量，而不是用于质量控制或状态监测。

1.1 This test method covers the evaluation of the thermal stability of hydrocarbon-based way lubricants, although oxidation may occur during the test. 1.2 The values stated in SI units are to be regarded as standard. 1.2.1 Exception— The values given in parentheses are for information only. 1.3 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. 1.4 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 Thermal stability characterizes physical and chemical property changes which may adversely affect an oil's lubricating performance. This test method evaluates the thermal stability of a way lubricant in the presence of copper and steel rods at 100 °C. Deposits and rod colors are the evaluation criteria. No correlation of the test to field service has been made. 5.2 This test method is intended for use in qualifying a way lubricant, rather than for quality control or condition monitoring purposes.