1.1 本规程涵盖了评估乘用车、轻型卡车服务中发动机冷却液的腐蚀防护和性能的更新程序，该程序与当前车辆和发动机制造商的实践非常相似。 注1: 车辆服务中的冷却液评估可能需要相当长的时间和费用；因此，应在实验室对产品进行预测试，以确保其普遍可接受性。典型的测试从小型的、严格控制的测试到大型的测试，在这些测试中，严格控制并不总是可行的。规范中定义了实验室测试最常引用的协议 D3306 , D7714 和 D7715 . 1.2 本规程中引用的单位应视为标准。括号中给出的值是近似等效值，仅供参考。 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 7. . 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 使用本规程获得的数据将为评估乘用车和轻型卡车服务（根据所选测试）中的冷却液性能提供依据。获得的数据也可用于为从模拟服务和发动机测功机测试中获得的数据提供额外的意义。

1.1 This practice covers an updated procedure for evaluating corrosion protection and performance of an engine coolant in passenger car, light truck service that closely imitates current vehicle and engine manufacturers’ practices. Note 1: Coolant evaluation in vehicle service may require considerable time and expense; therefore, the product should be pretested in the laboratory for general acceptability. Typical tests vary from small, closely controlled tests, to large tests where close control is not always practical. The most often referenced protocols for laboratory testing are defined in Specifications D3306 , D7714 , and D7715 . 1.2 The units quoted in this practice are to be regarded as standard. The values given in parentheses are approximate equivalents 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. Specific precautionary statements are given in Section 7 . 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 The data obtained from the use of this practice will provide a basis for the evaluation of coolant performance in passenger car, and light-duty truck service (according to the test chosen). The data obtained may also be used to provide added significance to the data obtained from simulated service and engine dynamometer tests.