1.1 本试验方法涵盖了在277℃下估算水及其蒸汽在碳氢化合物和脂肪族酯润滑剂中的平衡溶解度的程序 K和373 K、 该试验方法仅限于极性和氢键低至中等的液体，预计溶解度不超过1000 碳氢化合物重量ppm，或30 000 298时含氧化合物中的ppm（按重量计） K 1.2 特别排除的是烯烃、腈、硝基化合物和醇。 1.3 本试验方法仅适用于不含不同化学物质的液体。这不包括酯与碳氢化合物的混合物，以及含有洗涤剂、分散剂、防锈剂或负载添加剂的润滑剂。 1.4 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。 1.5 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。 1.6 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====== 5.1 水含量的知识在润滑中很重要，因为大量的水会导致钢轴承的腐蚀疲劳，而完全缺水会导致金属擦伤。 5.2 高含水量会加速润滑油的氧化，也会导致起泡，尤其是在高海拔或高温下，或两者兼而有之。

1.1 This test method covers a procedure for estimating the equilibrium solubility of water and its vapor in hydrocarbon and aliphatic ester lubricants, at temperatures between 277 K and 373 K. The test method is limited to liquids of low to moderate polarity and hydrogen bonding, with predicted solubilities not over 1000 ppm by weight in hydrocarbons, or 30 000 ppm by weight in oxygenated compounds, at 298 K. 1.2 Specifically excluded are olefins, nitriles, nitro compounds, and alcohols. 1.3 This test method is recommended only for liquids not containing widely different chemical species. This excludes blends of esters with hydrocarbons, and lubricants containing detergents, dispersants, rust preventives, or load carrying additives. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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 Knowledge of the water content is important in lubrication, as large amounts of water can cause corrosion fatigue in steel bearings, and the complete absence of water can cause metal scuffing. 5.2 High water content has an accelerating effect on oxidation of lubricants, and can also contribute to foaming, especially at high altitude or temperature, or both.