1.1 该测试方法密切估计了多层镍电镀层各层的厚度以及在恒定电流密度下阳极剥离时各层之间的电位差。 2. , 3. 1.2 本试验方法不包括多层电镀镍镀层以外的镀层系统。 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 多层镍镀层增强耐蚀性的能力是镍层电极电位差（在给定电解液中以固定电流密度与参比电极单独测量）和层厚度的函数。 电位差必须足以导致光亮镍或顶层相对于其下方的半光亮镍层优先腐蚀和牺牲。 4.2 该测试程序允许直接在电镀零件上而不是在单独的箔试样上测量这些电位差，其方式是时间决定每一层的厚度，而镍层之间的电位差指示总镍镀层的耐腐蚀性。 4.3 本试验结果的解释和评估应由买方和制造商达成协议。 注1: 本试验可作为生产中应用的多层镍涂层的质量保证试验。应了解，由于在实际使用零件期间影响腐蚀进度的许多因素，不同多层镍镀层在试验中的性能不能作为这些镀层在使用中的相对耐腐蚀性的绝对指标。

1.1 This test method closely estimates the thickness of individual layers of a multilayer nickel electrodeposit and the potential differences between the individual layers while being anodically stripped at constant current density. 2 , 3 1.2 This test method does not cover deposit systems other than multilayer electroplated nickel deposits. 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 The ability of a multilayer nickel deposit to enhance corrosion resistance is a function of the difference in the electrode potentials of the nickel layers (as measured individually at a fixed current density in a given electrolyte versus a reference electrode) and the thicknesses of the layers. The potential differences must be sufficient to cause the bright nickel or top layer to corrode preferentially and sacrificially with respect to the semi-bright nickel layer beneath it. 4.2 This test procedure allows the measurement of these potential differences directly on an electroplated part rather than on separate foil specimens in such a way that time determines the thickness of each layer, while the potential difference between nickel layers is an indication of the corrosion resistance of the total nickel deposit. 4.3 The interpretation and evaluation of the results of this test should be by agreement between the purchaser and the manufacturer. Note 1: This test may be used as a quality assurance test of the multilayer nickel coatings applied in production. It should be understood that due to many factors that influence the progress of corrosion during actual use of the part, the performance of different multilayer nickel deposits in the test cannot be taken as an absolute indicator of the relative corrosion resistance of these deposits in service.