铝和铝合金的阳极氧化.封孔后的阳极氧化膜吸收能力损失的评估. 酸处理后的染斑试验

[中文适用范围]： 本文件规定了一种通过酸预处理后的染料吸收来估计经过封闭处理的阳极氧化涂层吸收能力损失的方法。 该方法适合用作生产控制方法，并且可适用于可能经受风化或侵蚀性环境的阳极氧化涂层，或者耐染色性很重要的情况。 该方法不适用于以下涂层：a）在含铜量超过2%或硅量超过4%的合金上形成，c）经过补充处理，例如涂油、打蜡或涂漆，e）厚度小于3μm。 b) 通过重铬酸盐工艺密封， d) 着色为深色调，并且 当镍盐或钴盐或有机添加剂已添加到用于水热密封的浴中时，该方法不太合适。 [外文原描述]： ISO 2143 specifies a method of estimating the loss of absorptive power of anodic oxidation coatings that have undergone a sealing treatment, by dye absorption after acid pretreatment. The method is suitable for use as a production control method and can be applicable to anodic oxidation coatings which may be subjected to weathering or aggressive environments, or where resistance to staining is important. The method is not applicable to those coatings that a) are formed on alloys containing more than 2 % copper or 4 % silicon, b) are sealed by the dichromate process, c) have been given supplementary processing, e.g. oiling, waxing or lacquering, d) are coloured in deep shades, and e) are less than 3 μm thickness. The method is less appropriate where nickel or cobalt salts, or organic additives, have been added to baths used for hydrothermal sealing.