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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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