1.1 本试验方法涵盖了实验室筛选程序，用于评估发动机冷却液兼容性和90℃老化两周后的防腐性能 °C在使用焊剂钎焊的铝热交换器中。 1.2 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。 1.3 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。 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====== 4.1 汽车和卡车散热器和加热器芯现在主要由铝合金制成，使用各种制造工艺，包括用助焊剂钎焊（参见 附录X1 更多信息）。热交换器中残留的内部钎焊焊剂以及内部铝表面积与冷却液体积的高比率可能会影响冷却液的某些物理和化学特性以及防腐。 本试验方法提供了一种筛选试验，以评估发动机冷却液的物理和化学特性以及在停滞条件下用焊剂在高温钎焊的热交换器中老化后的防腐性能。这种方法不能单独作为焊剂钎焊铝热交换器中令人满意的冷却剂性能的证据。发动机冷却液配方的实际使用只能通过更全面的台架、测功机和现场试验来确定。

1.1 This test method covers a laboratory screening procedure for evaluating engine coolant compatibility and corrosion protection after aging two weeks at 90 °C in an aluminum heat exchanger brazed using flux. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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. 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 ====== 4.1 Automobile and truck radiators and heater cores are now predominantly made with aluminum alloys using various manufacturing processes including brazing with a flux (See Appendix X1 for additional information). The presence of residual internal brazing flux in heat exchangers along with the high ratio of internal aluminum surface area to coolant volume may affect certain physical and chemical properties and corrosion protection of the coolant. This test method provides a screening test to assess engine coolant physical and chemical properties and corrosion protection after aging it in a heat exchanger brazed with flux at elevated temperature under stagnant conditions. This method cannot stand alone as evidence of satisfactory coolant performance in flux-brazed aluminum heat exchangers. The actual service of an engine coolant formulation can be determined only by more comprehensive bench, dynamometer, and field tests.