铝及其合金的阳极氧化处理 通过测定在酸性溶液中浸渍后质量损失来评估封闭型阳极氧化涂层的质量

[中文适用范围]： 本文件规定了评估铝及其合金密封阳极氧化涂层质量的两种方法： 方法1：通过测量在未经预先酸处理的磷酸基溶液中浸泡后的质量损失来评估密封阳极氧化涂层的质量； 方法2：通过测量在预先酸处理后的磷酸基溶液中浸泡后的质量损失来评估密封阳极氧化涂层的质量。 方法1适用于用于装饰或保护目的或耐染色性很重要的阳极氧化涂层。 方法2适用于用于户外建筑用途的阳极氧化涂层。对于不太严苛的应用，方法1可能更合适。 这些方法不适用于以下情况： 通常未密封的硬质阳极氧化涂层； 仅在重铬酸盐溶液中密封过的阳极氧化涂层； 在铬酸溶液中生产的阳极氧化涂层； 经过处理使其具有疏水性的阳极氧化涂层。 注1：虽然这些方法评估的是应用于阳极氧化铝的水热封孔质量，但它们也适用于其他封孔方法。 注2：这些方法是破坏性的，当对吸光度损失测试（见ISO 2143）或导纳测量（见ISO 2931）的结果有疑问或争议时，可以作为参考方法。 [外文原描述]： This document specifies two methods to assess the quality of sealed anodic oxidation coatings on aluminium and its alloys: — Method 1 which assesses the quality of sealed anodic oxidation coatings by measuring the loss of mass after immersion in a phosphoric acid based solution without prior acid treatment; — Method 2 which assesses the quality of sealed anodic oxidation coatings by measuring the loss of mass after immersion in a phosphoric acid based solution with prior acid treatment. Method 1 is applicable to anodic oxidation coatings intended for decorative or protective purposes or where resistance to staining is important. Method 2 is applicable to anodic oxidation coatings intended for outdoor architectural purposes. For less severe applications, Method 1 can be more suitable. The methods are not applicable to the following: — hard-type anodic oxidation coatings which normally are not sealed; — anodic oxidation coatings that have been sealed only in dichromate solutions; — anodic oxidation coatings produced in chromic acid solutions; — anodic oxidation coatings that have undergone treatment to render them hydrophobic. NOTE 1 While the methods assess the quality of hydrothermal sealing applied to anodized aluminium, they can be appropriate for other sealing methods. NOTE 2 The methods are destructive and can serve as reference methods in case of doubt or dispute regarding the results of the test for loss of absorptive power (see ISO 2143) or the measurement of admittance (see ISO 2931).