1.1 本规程涵盖了评估锌和镉表面非铬酸盐（铬酸盐定义为铬处于+6氧化状态的化合物，因此，不应排除处于其他氧化状态（如+3）的铬化合物）处理产生的化学和电化学转化涂层的保护值的程序。 1.2 非铬酸盐涂层的保护值通常通过盐雾试验和确定涂层在用于该目的时是否具有足够的耐磨性来确定。 1.3 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 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。 1.5 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 本规程适用于无色、有色、电化学涂覆或非电化学涂覆的非铬酸盐涂层。锌或镉，或两者，可以电沉积、机械沉积、热浸镀锌、轧制或以铸件的形式。 4.2 由于盐雾试验中固有的变量可能因试验柜的不同而不同，买方应规定试验结果是否符合预期性能。 4.3 本规程未涵盖厚度、颜色、光泽和提供良好油漆附着力的能力等特性，也未涵盖这些饰面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 non-chromate (chromate being defined as a compound that has chromium in the plus six oxidation state, and as such, chromium compounds in other oxidation states, such as plus three, shall not be excluded) treatments of zinc and cadmium surfaces. 1.2 The protective value of a non-chromate coating is usually determined by salt-spray test and by determining whether or not the coating possesses adequate abrasion resistance when applied for that purpose. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. 1.5 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 non-chromate coatings that are colorless, colored, electrochemically applied or non-electrochemically applied. The zinc or cadmium, or both, may be electrodeposited, mechanically deposited, hot-dipped, rolled, or in the form of castings. 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.