1.1 本试验方法涵盖了在受控、基本等温的实验室条件下，循环发动机冷却液对金属试样和汽车冷却系统部件的影响。 1.2 本试验方法规定了当前汽车使用的典型试验材料、冷却系统部件、冷却液类型和冷却液流动条件。 1.3 以国际单位制或英寸-磅单位表示的值应单独视为标准值。每个系统中所述的值不一定是完全等效的； 因此，为确保符合标准，每个系统应独立使用，两个系统的值不得组合。有些值只有国际单位制，因为实践中没有使用英寸-磅当量。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、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措施 7. . 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 5.1 该试验方法通过更接近发动机冷却系统条件，比玻璃器皿试验（试验方法 D7935/D7935M ). 这种改进是通过控制冷却剂的循环、使用汽车冷却系统部件以及提高金属表面积与冷却剂体积的比率来实现的。 5.2 虽然这种测试方法提供了更好的辨别力，但它不能最终预测令人满意的腐蚀抑制和使用寿命。如果希望更好地保证令人满意的性能，则应从全尺寸发动机测试和实际使用中的现场测试中获得。 5.3 测试的意义和解释及其局限性在 附录X1 . 5.4 第节设备中组件的替换 6. 如果缔约双方同意，是允许的。

1.1 This test method covers the effect of a circulating engine coolant on metal test specimens and automotive cooling system components under controlled, essentially isothermal laboratory conditions. 1.2 This test method specifies test material, cooling system components, type of coolant, and coolant flow conditions that are considered typical of current automotive use. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. Some values have only SI units because the inch-pound equivalents are not used in practice. 1.4 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 . 1.5 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, by a closer approach to engine cooling system conditions, provides better evaluation and selective screening of engine coolants than is possible from glassware testing (Test Method D7935/D7935M ). The improvement is achieved by controlled circulation of the coolant, by the use of automotive cooling system components, and by a greater ratio of metal surface area to coolant volume. 5.2 Although this test method provides improved discrimination, it cannot conclusively predict satisfactory corrosion inhibition and service life. If greater assurance of satisfactory performance is desired, it should be obtained from full-scale engine tests and from field testing in actual service. 5.3 Significance and interpretation of the test and its limitations are discussed further in Appendix X1 . 5.4 The substitution of components in the apparatus of Section 6 is permissible if agreed upon by the contracting parties.