1.1 本试验方法包括评估含聚合物流体的剪切稳定性。该测试方法测量100℃时的粘度损失百分比 当通过使用欧洲柴油喷射器测试设备的柴油喷射器装置程序进行评估时，含聚合物液体的°C。粘度损失反映了由于喷嘴处的剪切而导致的聚合物降解。 注1: 试验方法 D2603 已用于剪切稳定性的类似评估；限制如重要性声明所示。没有详细尝试将本试验方法的结果与声波剪切试验方法的结果相关联。 注2: 本试验方法使用CEC L-14-A-93中定义的试验装置。在校准所需的时间段内，该试验方法与CEC-L-14-A-93不同。 注3: 试验方法 D5275 也会剪切柴油喷射器装置中的机油，但可能会产生不同的结果。 注4: 该试验方法与撤销的试验方法具有不同的校准和操作要求 D3945 . 注5: 试验方法 D7109 是一种类似的程序，用于测量30和90个注射周期的剪切稳定性。本试验方法仅使用30次注射循环。 1.2 以国际单位制表示的数值应视为标准。 1.2.1 例外情况- 括号中提供了非国际单位制。 1.3 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。 第节给出了具体的预防说明 8. . 1.4 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 本试验方法评估了高剪切喷嘴装置中聚合物降解导致的含聚合物流体的粘度损失百分比。热效应或氧化效应最小化。 5.2 本试验方法用于聚合物润滑添加剂制造商及其客户的质量控制目的。 5.3 本试验方法的目的不是预测不同现场设备在广泛变化的操作条件下的现场服务中的粘度损失，这可能会由于热变化和氧化变化以及聚合物的机械剪切而导致润滑剂粘度变化。然而，当现场使用条件主要或完全导致聚合物通过机械剪切降解时，本试验方法的结果与现场结果之间可能存在相关性。

1.1 This test method covers the evaluation of the shear stability of polymer-containing fluids. The test method measures the percent viscosity loss at 100 °C of polymer-containing fluids when evaluated by a diesel injector apparatus procedure that uses European diesel injector test equipment. The viscosity loss reflects polymer degradation due to shear at the nozzle. Note 1: Test Method D2603 has been used for similar evaluation of shear stability; limitations are as indicated in the significance statement. No detailed attempt has been undertaken to correlate the results of this test method with those of the sonic shear test method. Note 2: This test method uses test apparatus as defined in CEC L-14-A-93. This test method differs from CEC-L-14-A-93 in the period of time required for calibration. Note 3: Test Method D5275 also shears oils in a diesel injector apparatus but may give different results. Note 4: This test method has different calibration and operational requirements than withdrawn Test Method D3945 . Note 5: Test Method D7109 is a similar procedure that measures shear stability at both 30 and 90 injection cycles. This test method uses 30 injection cycles only. 1.2 The values stated in SI units are to be regarded as the standard. 1.2.1 Exception— Non-SI units are provided in parentheses. 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. Specific precautionary statements are given in Section 8 . 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 This test method evaluates the percent viscosity loss for polymer-containing fluids resulting from polymer degradation in the high shear nozzle device. Thermal or oxidative effects are minimized. 5.2 This test method is used for quality control purposes by manufacturers of polymeric lubricant additives and their customers. 5.3 This test method is not intended to predict viscosity loss in field service in different field equipment under widely varying operating conditions, which may cause lubricant viscosity to change due to thermal and oxidative changes as well as by the mechanical shearing of polymer. However, when the field service conditions, primarily or exclusively, result in the degradation of polymer by mechanical shearing, there may be a correlation between the results from this test method and results from the field.