1.1 本规程涵盖了通过比较一种或三种二元润滑脂混合物与组成该混合物的纯润滑脂的特性或性能来评估其兼容性的方案。 1.2 使用标准测试方法在主要测试方案中评估三个特性:( 1. )测试方法测定的滴点 D566 （或试验方法 D2265 ); ( 2. )用试验方法测定剪切稳定性 D217 , 100 000–冲程工作贯入度；和( 3. )通过60冲程渗透变化在高温下的储存稳定性（试验方法 D217 ). 对于相容混合物（通过所有主要测试的混合物），当情况表明需要额外测试时，建议采用二次（非强制性）测试方案。 1.3 连续或并发测试一直持续到第一次失败。 如果任何混合物未通过任何主要测试，则表明润滑脂不相容。如果所有混合物通过三个主要测试，则认为润滑脂是相容的。 1.4 本规程仅适用于具有适合通过建议的试验方法进行评估的特性的润滑脂。如果特定测试方法的范围将测试限制在指定性能范围内的润滑脂，则该测试方法无法测试该范围外的润滑脂的兼容性。例外情况是，纯组分润滑脂的测试性能在规定范围内，但混合物的测试性能因不相容性而超出范围。 1.5 本规程并未涵盖所有可采用的试验方法。 1.6 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。 1.7 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。 有关具体安全信息，请参阅 7.2.3 . ====意义和用途====== 5.1 润滑脂的兼容性对于润滑脂润滑设备的用户来说非常重要。众所周知，两种润滑脂的混合可以产生明显劣于其任何一种组成材料的物质。可能发生以下一种或多种情况。不相容润滑脂的混合物通常会软化，有时会过度软化。 有时，它会变硬。在极端情况下，增稠剂和液体润滑剂将完全分离。放气可能非常严重，混合的润滑脂将从工作轴承中流出。可能会发生过度脱水，形成与润滑脂分离的液体润滑剂池。滴点可以减少到润滑脂或分离的油在较高的工作温度下从轴承中流出的程度。此类事件可能导致灾难性的润滑故障。 5.1.1 由于这种情况，设备制造商建议在安装不同的润滑脂之前，彻底清除设备上的润滑脂。润滑脂润滑设备的维修建议经常规定警告—— 在任何情况下都不要混合润滑脂。 尽管有此警告，润滑脂仍会混合，有时无法避免。 在这种情况下，了解两种润滑脂的混合是否会导致润滑不足，并产生灾难性后果，这将非常有用。设备用户通常没有资源来评估润滑脂兼容性，必须依赖其供应商。混合润滑脂是一种非常轻率的做法。润滑脂和设备制造商都认识到，尽管所有警告都与此相反，但仍会发生此类行为。因此，用户和供应商都需要了解相关润滑脂的兼容性特征。 5.2 有两种方法可以评估润滑脂混合物的兼容性。一是确定此类混合物是否符合与组成成分相同的规范要求。这种方法不适用于本实践。 相反，这种做法采取了与规范无关的方法；它描述了使用特定测试方法在相对基础上评估兼容性。 5.2.1 使用了三种测试方法，因为较少的测试方法不够确定。例如，在一项研究中，使用100 000冲程工作贯入度评估，62 % 的混合物被判定为相容。 5. 在一项涵盖更广泛油脂类型的高温储存稳定性研究中，只有三分之一的混合物是相容的。 5. 这些研究使用不同的标准来判断兼容性。 5.2.2 根据对润滑脂成分的预先了解，无法确定预测相容性。通常，具有相同或类似增稠剂类型的润滑脂是相容的。不常见的是，即使是同一类型的润滑脂，虽然在混合时通常是相容的，但由于不相容的添加剂处理，也可能是不相容的。 因此，需要根据具体情况来判断兼容性。 5.3 两种成分润滑脂按特定比例混合。50:50的混合物模拟了当一种润滑脂（润滑脂A）安装在包含先前安装的不同润滑脂（润滑脂B）的轴承中时可能出现的比率，并且没有尝试用润滑脂A冲洗润滑脂B。10:90和90:10的比率旨在模拟当尝试用润滑脂A冲洗润滑脂B时可能出现的比率。 注1: 一些公司评估25:75和75:25比例的混合物，而不是10:90和90:10比例的混合物。但是，本规程规定的后两个比率被认为更能代表中所述的冲洗规程 5.3 . 5.3.1 不相容性通常通过50分的评估来揭示: 50种混合物。然而，在某些情况下，50:50的混合物是相容的，更稀的比例是不相容的。（参见 附录X1 还有米德。 6. ) 5.4 兼容性信息可用于随特定润滑脂提供的产品信息文献中。它也可用于描述润滑实践和设备维护的文献中。

1.1 This practice covers a protocol for evaluating the compatibility of one or three binary mixtures of lubricating greases by comparing their properties or performance relative to those of the neat greases comprising the mixture. 1.2 Three properties are evaluated in a primary testing protocol using standard test methods: ( 1 ) dropping point by Test Method D566 (or Test Method D2265 ); ( 2 ) shear stability by Test Methods D217 , 100 000–stroke worked penetration; and ( 3 ) storage stability at elevated-temperature by change in 60-stroke penetration (Test Method D217 ). For compatible mixtures (those passing all primary testing), a secondary (nonmandatory) testing scheme is suggested when circumstances indicate the need for additional testing. 1.3 Sequential or concurrent testing is continued until the first failure. If any mixture fails any of the primary tests, the greases are incompatible. If all mixtures pass the three primary tests, the greases are considered compatible. 1.4 This practice applies only to lubricating greases having characteristics suitable for evaluation by the suggested test methods. If the scope of a specific test method limits testing to those greases within a specified range of properties, greases outside that range cannot be tested for compatibility by that test method. An exception to this would be when the tested property of the neat, constituent greases is within the specified range, but the tested property of a mixture is outside the range because of incompatibility. 1.5 This practice does not purport to cover all test methods that could be employed. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. For specific safety information, see 7.2.3 . ====== Significance And Use ====== 5.1 The compatibility of greases can be important for users of grease-lubricated equipment. It is well known that the mixing of two greases can produce a substance markedly inferior to either of its constituent materials. One or more of the following can occur. A mixture of incompatible greases most often softens, sometimes excessively. Occasionally, it can harden. In extreme cases, the thickener and liquid lubricant will completely separate. Bleeding can be so severe that the mixed grease will run out of an operating bearing. Excessive syneresis can occur, forming pools of liquid lubricant separated from the grease. Dropping points can be reduced to the extent that grease or separated oil runs out of bearings at elevated operating temperatures. Such events can lead to catastrophic lubrication failures. 5.1.1 Because of such occurrences, equipment manufacturers recommend completely cleaning the grease from equipment before installing a different grease. Service recommendations for grease-lubricated equipment frequently specify the caveat– do not mix greases under any circumstances. Despite this admonition, grease mixing will occur and, at times, cannot be avoided. In such instances, it would be useful to know whether the mixing of two greases could lead to inadequate lubrication with disastrous consequences. Equipment users most often do not have the resources to evaluate grease compatibility and must rely on their suppliers. Mixing of greases is a highly imprudent practice. Grease and equipment manufacturers alike recognize such practices will occur despite all warnings to the contrary. Thus, both users and suppliers have a need to know the compatibility characteristics of the greases in question. 5.2 There are two approaches to evaluating the compatibility of grease mixtures. One is to determine whether such mixtures meet the same specification requirements as the constituent components. This approach is not addressed by this practice. Instead, this practice takes a specification-independent approach; it describes the evaluation of compatibility on a relative basis using specific test methods. 5.2.1 Three test methods are used because fewer are not sufficiently definitive. For example, in one study, using 100 000-stroke worked penetration for evaluation, 62 % of the mixtures were judged to be compatible. 5 In a high-temperature storage stability study, covering a broader spectrum of grease types, only one-third of the mixtures were compatible. 5 These studies used different criteria to judge compatibility. 5.2.2 Compatibility cannot be predicted with certainty from foreknowledge of grease composition. Generally, greases having the same or similar thickener types will be compatible. Uncommonly, even greases of the same type, although normally compatible when mixed, can be incompatible because of incompatible additive treatments. Thus, compatibility needs to be judged on a case-by-case basis. 5.3 Two constituent greases are blended in specific ratios. A 50:50 mixture simulates a ratio that might be experienced when one grease (Grease A) is installed in a bearing containing a previously installed, different grease (Grease B), and no attempt is made to flush out Grease B with Grease A. The 10:90 and 90:10 ratios are intended to simulate ratios that might occur when attempts are made to flush out Grease B with Grease A. Note 1: Some companies evaluate 25:75 and 75:25 ratio mixtures instead of 10:90 and 90:10 ratio mixtures. But, the latter two ratios, which are prescribed by this practice, are considered more representative of the flushing practice described in 5.3 . 5.3.1 Incompatibility is most often revealed by the evaluation of 50:50 mixtures. However, in some instances 50:50 mixtures are compatible and more dilute ratios are incompatible. (See Appendix X1 and Meade. 6 ) 5.4 Compatibility information can be used in product information literature supplied with specific greases. It can be used also in literature describing lubrication practices and equipment maintenance.