1.1 本试验方法涵盖了永磁合金在高温高压水蒸气环境中耐腐蚀的设备、程序和测量。该试验也称为整体腐蚀试验（BCT）。 1.2 以习惯单位（cgs-emu和英寸-磅）或国际单位表示的数值和方程式应单独视为标准。在本标准中，当国际单位与常用单位不同时，用括号表示，每个系统中规定的值可能不是完全等效的；因此，每个系统应独立使用。将两个系统的值结合起来可能会导致不符合本标准。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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 该测试方法提供了一个可控的腐蚀环境，可用于产生烧结永磁体的相对耐腐蚀性信息。 5.2 尽管自然环境中性能的预测很少与腐蚀试验结果在统计上相关，但有足够的经验结果支持该试验在量化相对耐湿热腐蚀性方面的有用性。 5.3 该试验方法中结果的再现性取决于试验样品的类型、尺寸和形状，以及操作变量的控制。在任何测试程序中，应包括足够的重复，以确定置信限。副本可以同时运行，在随后的测试运行中，或在重复的测试室中运行。 5.4 当使用多个试验室和操作员时，应努力对设备、操作员和试验方法进行适当的重复性和再现性研究。

1.1 This test method covers the equipment, procedures, and measurement of the resistance of permanent magnet alloys against corrosion in high temperature, high pressure water vapor environments. This test is also known as the Bulk Corrosion Test (BCT). 1.2 The values and equations stated in customary (cgs-emu and inch-pound) units or SI units are to be regarded separately as standard. Within this standard the SI units, when different from customary units, are shown in brackets, the values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with 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 ====== 5.1 This test method provides a controlled corrosive environment which can be utilized to produce relative corrosion resistance information for sintered permanent magnets. 5.2 Although prediction of performance in natural environments has seldom been statistically correlated with corrosion test results, sufficient empirical results are available to support the usefulness of this test in quantifying relative resistance to corrosion from moisture and heat. 5.3 The reproducibility of results in this test method is dependent on the type, size, and shape of specimens tested, and the control of the operating variables. In any testing program, sufficient replicates should be included to establish confidence limits. Replicates may be run simultaneously, in subsequent test runs, or in duplicate test chambers. 5.4 When multiple test chambers and operators are utilized, efforts shall be made to perform a suitable repeatability and reproducibility study for the equipment, operators, and test method.