1.1 该试验方法提供了一种方法，用于测量钢上电镀装饰性镍加铬或铜加镍加铬涂层经过腐蚀试验后腐蚀部位的平均尺寸和数量。该试验方法可用于比较不同电镀系统的相对耐腐蚀性和不同腐蚀环境的相对腐蚀性。腐蚀部位的数量和大小与外观退化有关。电镀层的渗透导致基体金属腐蚀产物的出现。 1.2 以国际单位制表示的数值应视为标准。 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====== 4.1 不同的电镀系统可以在相同的条件下腐蚀相同的时间长度。半径或半宽度的平均值或穿透下层金属层的平均值的差异是系统相对耐腐蚀性的重要衡量标准。 因此，如果与其他系统相比，具有给定电镀系统的样品上的凹坑半径显著更高，则表明前者通过形成可见凹坑而较早失效的趋势。如果渗透到半亮镍层中的程度明显更高，则基底金属腐蚀导致早期失效的趋势是明显的。

1.1 This test method provides a means for measuring the average dimensions and number of corrosion sites in an electroplated decorative nickel plus chromium or copper plus nickel plus chromium coating on steel after the coating has been subjected to corrosion tests. This test method is useful for comparing the relative corrosion resistances of different electroplating systems and for comparing the relative corrosivities of different corrosive environments. The numbers and sizes of corrosion sites are related to deterioration of appearance. Penetration of the electroplated coatings leads to appearance of basis metal corrosion products. 1.2 The values stated in SI units are to be regarded as the 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 ====== 4.1 Different electroplating systems can be corroded under the same conditions for the same length of time. Differences in the average values of the radius or half-width or of penetration into an underlying metal layer are significant measures of the relative corrosion resistance of the systems. Thus, if the pit radii are substantially higher on samples with a given electroplating system, when compared to other systems, a tendency for earlier failure of the former by formation of visible pits is indicated. If penetration into the semi-bright nickel layer is substantially higher, a tendency for earlier failure by corrosion of basis metal is evident.