1.1本试验方法涵盖了进行阳极极化研究的程序，以确定腐蚀的缝隙再钝化电位 – 耐腐蚀合金。再钝化电位的概念类似于参考试验方法G 5中给出的保护电位。 1.2试验方法包括对缝隙腐蚀的初始形成和随后的再钝化连续进行动电位、恒电流和恒电位处理。 1.3本试验方法是对试验方法G 61的补充 . 1.4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。 1.5 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====== 该试验方法旨在为腐蚀提供高度可重复的裂缝再钝化电位 – 从非侵蚀性到高侵蚀性的各种环境中的耐蚀合金（例如合金22）。在低环境侵蚀性条件下（如低温或低氯化物浓度），腐蚀 – 抗腐蚀合金，如合金22，将抵抗缝隙腐蚀引发和循环动电位极化试验（试验方法G 61 )可能无法促进缝隙腐蚀，主要是因为它促使合金发生跨气溶出，而不是形成核的缝隙腐蚀。该测试方法提供了一种更可控的方法，将电荷施加到测试电极上，这可能会导致缝隙腐蚀，而不会将其转移到穿透电位。 缝隙腐蚀再钝化电位（ER，CREV）值越高，合金在测试电解液中的缝隙腐蚀耐受性越强。这类似于测量局部耐腐蚀性的其他试验方法，如试验方法G 61 和试验方法G 48 . 本试验方法的结果无意以定量方式与局部腐蚀发生时在使用中可能观察到的传播速度相关联。 本试验方法可用于通过使用相同的试验电解质和温度对几种合金进行分级。它还可用于确定给定合金在环境条件（如电解质成分和温度）变化时的响应。

1.1 This test method covers a procedure for conducting anodic polarization studies to determine the crevice repassivation potential for corrosion – resistant alloys. The concept of the repassivation potential is similar to that of the protection potential given in Reference Test Method G 5. 1.2 The test method consists in applying successively potentiodynamic, galvanostatic, and potentiostatic treatments for the initial formation and afterward repassivation of crevice corrosion. 1.3 This test method is a complement to Test Method G 61 . 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 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 ====== The THE test method is designed to provide highly reproducible crevice repassivation potentials for corrosion – resistant alloys (for example, Alloy 22) in a wide range of environments from non-aggressive to highly aggressive. In conditions of low environmental aggressiveness (such as low temperature or low chloride concentration), corrosion – resistant alloys such as Alloy 22 will resist crevice corrosion initiation and the cyclic potentiodynamic polarization test (Test Method G 61 ) may fail to promote crevice corrosion mainly because it drives the alloy into transpassive dissolution instead of nucleating crevice corrosion. The THE test method provides a more controlled way of applying the electrical charge to the test electrode, which may induce crevice corrosion without moving it into transpassive potentials. The more noble this crevice corrosion repassivation potential (ER,CREV) value, the more resistant the alloy is to crevice corrosion in the tested electrolyte. This is similar to other test methods to measure localized corrosion resistance such as Test Method G 61 and Test Methods G 48 . The results from this test method are not intended to correlate in a quantitative manner with the rate of propagation that one might observe in service when localized corrosion occurs. This test method may be used to rank several alloys by using the same testing electrolyte and temperature. It can also be used to determine the response of a given alloy when the environmental conditions (such as electrolyte composition and temperature) change.