1.1 本试验方法用于评估高温下在氧气和金属催化剂（铜和铁）存在下的氧化过程中蒸汽和燃气轮机润滑剂的结渣倾向。该测试方法可用于评估工业用油（例如，循环油等）。 1.2 本试验方法是对试验方法的修改 D4310型 其中相同种类的油的结垢和腐蚀倾向在1000 95小时 在水存在下，温度为°C。本修改中省略了水。 1.3 以国际单位制表示的值应视为标准值。 1.3.1 例外情况- 某些图中括号内的值仅供使用基于非国际单位制的旧设备的人员参考。 1.4 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。 1.5 警告 -汞已被许多监管机构指定为可导致严重医疗问题的危险物质。汞或其蒸汽已被证明对健康有害，对材料具有腐蚀性。在处理汞和含汞产品时要小心。有关更多信息，请参阅适用的产品安全数据表（SDS）。当地或国家法律可能禁止销售汞或含汞产品，或两者兼而有之。用户必须确定其所在地销售的合法性。 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 在氧化条件下，油中可能会形成不溶性物质。 5.2 在本试验过程中，油不溶物或金属腐蚀产物的大量形成，或两者兼有，可能表明油将形成不溶物，或腐蚀金属，或两者兼而有之，从而在现场服务期间形成清漆。使用中的清漆形成水平将取决于许多因素（涡轮机设计、水库温度、工作周期，例如峰值、循环或基本负载工作、维护等），本试验结果与现场清漆形成之间的直接关系尚待确定。 5.3 120时的氧化条件 试验方法加速氧化环境下的°C D4310型 污泥和RPVOT值的测量可以反映实际涡轮机操作中的实际油质量。 该试验结果应与其他关键润滑剂性能指标（包括其他已确定的氧化和腐蚀试验）一起使用，以表明其适用性。

1.1 This test method is used to evaluate the sludging tendencies of steam and gas turbine lubricants during the oxidation process in the presence of oxygen and metal catalyst (copper and iron) at an elevated temperature. This test method may be used to evaluate industrial oils (for example, circulating oils and so forth). 1.2 This test method is a modification of Test Method D4310 where the sludging and corrosion tendencies of the same kinds of oils are determined after 1000 h at 95 °C in the presence of water. Water is omitted in this modification. 1.3 The values stated in SI units are to be regarded as standard. 1.3.1 Exception— The values in parentheses in some of the figures are provided for information only for those using old equipment based on non-SI units. 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 WARNING —Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Use Caution when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for additional information. The potential exists that selling mercury or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their location. 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 Insoluble material may form in oils that are subjected to oxidizing conditions. 5.2 Significant formation of oil insolubles or metal corrosion products, or both, during this test may indicate that the oil will form insolubles or corrode metals, or both, resulting in varnish formation during field service. The level of varnish formation in service will be dependent on many factors (turbine design, reservoir temperature, duty-cycle, for example. peaking, cycling, or base-load duty, maintenance, and so forth) and a direct correlation between results in this test and field varnish formation are yet to be established. 5.3 Oxidation condition at 120 °C under accelerated oxidation environment of Test Method D4310 and measurement of sludge and RPVOT value could reflect a practical oil quality in actual turbine operations. Results from this test should be used together with other key lubricant performance indicators (including other established oxidation and corrosion tests) to indicate suitability for service.