1.1 本规程涵盖了评估锌和镉表面铬酸盐处理产生的化学和电化学转化涂层保护值的程序。 1.2 铬酸盐涂层的保护值通常通过盐雾试验和确定涂层是否具有足够的耐磨性来确定。 1.3 可以使用其他方法，例如暴露在潮湿环境中，但通常持续时间太长，没有实际价值。使用压力锅的“蒸汽试验”也用于测试热浸镀锌表面的铬酸盐膜。 1.4 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.5 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。 1.6 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 本规程适用于无色（一浸和二浸）、彩虹黄色或青铜色、橄榄褐色、黑色、无色阳极、黄色或黑色阳极类型以及染色类型的铬酸盐涂层，当应用于电沉积锌、机械沉积锌、热- 浸锌、轧锌、电沉积镉、机械沉积镉和锌压铸件。 注1: 无色涂层也称为透明亮涂层或蓝色亮涂层。 4.2 由于盐雾试验中固有的变量可能因试验柜而异，因此买方应规定试验结果是否符合预期性能。 4.3 本规范不包括厚度、颜色、光泽和提供良好油漆附着力的能力等特性，也不包括这些面漆的化学成分和应用方法。

1.1 This practice covers a procedure for evaluating the protective value of chemical and electrochemical conversion coatings produced by chromate treatments of zinc and cadmium surfaces. 1.2 The protective value of a chromate coating is usually determined by salt-spray test and by determining whether or not the coating possesses adequate abrasion resistance. 1.3 Other methods, such as exposure to a humidity environment, can be used, but are generally of too long a duration to be of practical value. “Steam Tests” using pressure cookers have also been used for testing chromate films on hot-dip galvanized surfaces. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 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 This practice is applicable to chromate coatings of the colorless (both one and two-dip), iridescent yellow or bronze, olive drab, black, colorless anodic, yellow or black anodic types, and of the dyed variety, when applied to surfaces of electrodeposited zinc, mechanically deposited zinc, hot-dipped zinc, rolled zinc, electrodeposited cadmium, mechanically deposited cadmium, and zinc die castings. Note 1: Colorless coatings are also referred to as clear-bright or blue-bright coatings. 4.2 Because of variables inherent in the salt-spray test, which may differ from one test cabinet to another, interpretation of test results for compliance with expected performance should be specified by the purchaser. 4.3 Properties such as thickness, color, luster, and ability to provide good paint adhesion are not covered in this practice, nor are the chemical composition and the method of application of these finishes.