1.1 本试验方法旨在确定经过密封处理并与酸溶液接触的铝及其合金上的阳极氧化物涂层对染料是否是耐染色或不吸附的。 1.2 经过适当密封的涂层应能够防止着色材料的吸附，因此在许多类型的服务中都是“无污染的”。 1.3 本试验方法适用于暴露在天气中的阳极涂层，或用于腐蚀性介质中的保护目的，以及耐污染性很重要的阳极涂层。 注1: 本试验的性能只能预测染料染色的敏感性。它不打算预测服务性能中的其他因素，如点蚀或一般腐蚀。 注2: 对于密封在含有少于15ppm硅酸盐或3ppm磷酸盐的溶液中的铝协会I类和II类建筑阳极涂层，可以省略酸预处理。 1.4 如果涂层颜色较深，很难估计任何残留染料污渍的强度，则根据原始颜色是否受到测试作用的影响来解释测试。 1.5 本试验方法不适用于: 1.5.1 铬酸型阳极涂层。 1.5.2 含2质量%以上Cu或4.5质量%以上Si的铝合金上的阳极涂层。 1.5.3 仅在重铬酸盐溶液中密封的阳极涂层。 1.5.4 经过处理使其具有疏水性的阳极涂层。 1.6 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。 1.7 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。 1.8 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====== 3.1 本试验方法旨在确定铝及其合金上的阳极氧化物涂层是否已正确密封，因此是否耐吸收染料。

1.1 This test method is intended to determine whether anodic oxide coatings on aluminum and its alloys, that have undergone a sealing treatment and contact with an acid solution, are stainproof or nonadsorptive with respect to dyes. 1.2 Coatings that have been properly sealed should be proof against adsorption of coloring materials and, hence, “nonstaining” in many types of service. 1.3 This test method is applicable to anodic coatings intended for applications where they are exposed to the weather, or for protective purposes in corrosive media, and where resistance to staining is important. Note 1: Performance in this test is predictive only of susceptibility to stain by dyes. It is not intended to be predictive of other factors in service performance such as pitting or general corrosion. Note 2: For Aluminum Association Class I and II architectural anodic coatings that are sealed in solutions containing less than 15 ppm silicates or 3 ppm phosphates, the acid pretreatment may be omitted. 1.4 In the case of coatings colored in deep shades, where estimation of the intensity of any residual dye stain is difficult, interpretation of the test is based on whether or not the original color has been affected by the action of the test. 1.5 This test method is not applicable to: 1.5.1 Chromic acid type anodic coatings. 1.5.2 Anodic coatings on aluminum alloys containing more than 2 mass % Cu or 4.5 mass % Si. 1.5.3 Anodic coatings that have been sealed only in dichromate solutions. 1.5.4 Anodic coatings that have undergone a treatment to render them hydrophobic. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. 1.8 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 ====== 3.1 This test method is intended to determine whether anodic oxide coatings on aluminum and its alloys have been properly sealed and as a result are resistant to absorbing dyes.