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ISO 3613:2021

Metallic and other inorganic coatings — Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys — Test methods

General information
Valid from 10.05.2021
Directives or regulations
None
Standard history
Status
Date
Type
Name
10.05.2021
Main
03.12.2010
Main
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.
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