本文件规定了确定 -？存在无色铬酸盐转化涂层， -？在锌或镉或铝锌（铝的质量分数:55%，在54%到56%的质量分数范围内）和锌铝（铝的质量分数:5%）合金上的无色和有色涂层中存在六价铬， -？锌和镉的单位面积总铬含量， -？无色和有色涂层的单位面积质量， -？铬酸盐转化涂层的良好附着力，以及 -？铬酸盐涂层的质量。 这些方法适用于 -？无色和有色铬酸盐转化涂层，含有不同比例的三价铬和六价铬，通过化学或电化学工艺生产，以及 -？不含任何补充涂层（如油、水或溶剂）的铬酸盐涂层- 基于聚合物或蜡。

This document specifies methods for the determination of —    the presence of colourless chromate conversion coatings, —    the presence of hexavalent chromium in colourless and coloured coatings on zinc or cadmium or aluminium-zinc (mass fraction of aluminium: 55 %, within a range of 54 % to 56 % mass fraction) and zinc-aluminium (mass fraction of aluminium: 5 %) alloys, —    the total chromium content per unit area on zinc and cadmium, —    the mass per unit area of both colourless and coloured coatings, —    the satisfactory adhesion of chromate conversion coatings, and —    the quality of chromate coatings. These methods are applicable to —    colourless and coloured chromate conversion coatings containing trivalent and hexavalent chromium in varying proportions and produced by either chemical or electrochemical processes, and —    chromate coatings that are free from any supplementary coatings, such as oil, water or solvent-based polymers or wax.