1.1 本规范涵盖了钢上电沉积铜加镍加铬或镍加铬涂层、铜和铜合金上镍加铬镀层的几种类型和等级的要求，300型和400系列不锈钢上的镍加铬涂层，以及铝及其合金和锌合金上的铜加镍加铬镀层，这些应用场合的基底金属外观和防腐保护都很重要。提供了五种等级的涂层，以符合预期每种涂层都能提供令人满意性能的使用条件:即延长的非常严重、非常严重、严重、中等和轻微。这些使用条件的定义和典型示例见 附录X1 . 1.2 本规范不包括塑料电镀的要求，见规范 B604型 . 1.3 以下危险警告仅适用于试验方法部分， 附录X2 , 附录X3 , 附录X4 和 附录X5 本规范: 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（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。

1.1 This specification covers requirements for several types and grades of electrodeposited copper plus nickel plus chromium or nickel plus chromium coatings on steel, nickel plus chromium coatings on copper and copper alloys, nickel plus chromium coatings on Type 300 and 400 series stainless steel and copper plus nickel plus chromium coatings on aluminum and its alloys and zinc alloys for applications where both appearance and protection of the basis metal against corrosion are important. Five grades of coatings are provided to correspond with the service conditions under which each is expected to provide satisfactory performance: namely, extended very severe, very severe, severe, moderate, and mild. Definitions and typical examples of these service conditions are provided in Appendix X1 . 1.2 This specification does not cover the requirements for the plating on plastics, see Specification B604 . 1.3 The following hazards caveat pertains only to the test methods portions, Appendix X2 , Appendix X3 , Appendix X4 , and Appendix X5 of this specification: This standard does not purport to address all of 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.