1.1 本指南涵盖了进行缝隙腐蚀试验的信息，并确定了可能影响结果和结论的因素。 1.2 这些程序可用于确定最可能导致缝隙腐蚀的条件，并为评估各种合金在特定条件下的缝隙腐蚀相对电阻提供基础。 1.3 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.4 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。 有关特定警告声明，请参阅 7.1 . 1.5 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 本指南涵盖了铁基和镍基不锈钢合金在海水中的缝隙腐蚀测试程序。提供的指南也适用于其他含氯化物的天然水和各种实验室制备的含水氯化物环境中的缝隙腐蚀测试。 4.1.1 虽然本指南侧重于铁基和镍基不锈钢合金的测试，但本文所述的程序和评估方法已成功应用于表征其他合金系统的缝隙腐蚀性能（例如，见Aylor等人。 3. ). 注1: 就铜合金而言，与不同腐蚀机制相关的裂缝相关腐蚀发生在裂缝形成物附近，而不是在堵塞物内。 4.2 本指南介绍了各种缝隙成型机的使用，包括非金属分段垫圈设计，称为多缝隙组件（MCA），如中所述 9.2.2 . 4.3 在役性能数据提供了最可靠的确定材料是否满足特定最终用途的方法。 应避免将单个测试程序中的实验室数据转换为预测各种条件下的使用性能。抗扰度、优异的电阻等术语仅提供合金腐蚀性能的一般和相对定性描述。应认识到这些术语在描述耐缝隙腐蚀性方面的局限性。 4.4 虽然提供的指南通常用于评估板材和板材，但也适用于缝隙- 其他产品形式的腐蚀测试，如管材和棒材。 4.5 在一组条件下是否存在缝隙腐蚀并不保证在其他条件下不会发生。由于已知影响缝隙腐蚀的许多相互关联的冶金、环境和几何因素，任何给定试验的结果都可能或可能不表明服务应用中的实际性能，其中条件可能与试验不同。

1.1 This guide covers information for conducting crevice-corrosion tests and identifies factors that may affect results and influence conclusions. 1.2 These procedures can be used to identify conditions most likely to result in crevice corrosion and provide a basis for assessing the relative resistance of various alloys to crevice corrosion under certain specified conditions. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 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. For a specific warning statement, see 7.1 . 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 ====== 4.1 This guide covers procedures for crevice-corrosion testing of iron-base and nickel-base stainless alloys in seawater. The guidance provided may also be applicable to crevice corrosion testing in other chloride containing natural waters and various laboratory prepared aqueous chloride environments. 4.1.1 While this guide focuses on testing of iron-base and nickel-base stainless alloys, the procedures and evaluations methods described herein have been successfully applied to characterize the crevice corrosion performance of other alloy systems (see, for example, Aylor et al. 3 ). Note 1: In the case of copper alloys, the occurrence of crevice-related corrosion associated with different corrosion mechanisms takes place immediately adjacent to the crevice former rather than within the occlusion. 4.2 This guide describes the use of a variety of crevice formers including the nonmetallic, segmented washer design referred to as the multiple crevice assembly (MCA) as described in 9.2.2 . 4.3 In-service performance data provide the most reliable determination of whether a material would be satisfactory for a particular end use. Translation of laboratory data from a single test program to predict service performance under a variety of conditions should be avoided. Terms, such as immunity, superior resistance, etc., provide only a general and relatively qualitative description of an alloy's corrosion performance. The limitations of such terms in describing resistance to crevice corrosion should be recognized. 4.4 While the guidance provided is generally for the purpose of evaluating sheet and plate materials, it is also applicable for crevice-corrosion testing of other product forms, such as tubing and bars. 4.5 The presence or absence of crevice corrosion under one set of conditions is no guarantee that it will or will not occur under other conditions. Because of the many interrelated metallurgical, environmental, and geometric factors known to affect crevice corrosion, results from any given test may or may not be indicative of actual performance in service applications where the conditions may be different from those of the test.