1.1本试验方法涵盖了一种简单的玻璃器皿类型程序，用于评估温度和硬水对受控实验室条件下高温下发动机冷却液稳定性的影响。 1.2以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 4.1本试验方法提供了发动机冷却液浓缩液在高温下储存两周时的稳定性信息。这些测试条件可能会模拟产品在交付给客户之前在运输和仓库中存储的条件。 本试验方法提供了在高温下用合成硬水稀释的发动机冷却液稳定性的信息。本试验方法提供了一种实验室方法，用于测试发动机冷却液对硬水的敏感性。

1.1 This test method covers a simple glassware-type procedure for evaluating the effects of temperature and hard water on the stability of engine coolants at elevated temperatures under controlled laboratory conditions. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 4.1 This test method provides information on the stability of the engine coolant concentrate when stored at elevated temperatures for two weeks. These test conditions might simulate the conditions that a product would be subjected to in transit and storage in warehouses before delivery to the customer. This test method provides information on the stability of an engine coolant diluted with synthetic hard water at elevated temperatures. This test method provides a laboratory method to test the sensitivity of the engine coolant to hard water.