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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
10 maj 2021

General information

90.20     15 pri 2026

ISO

ISO/TC 107

International Standard

25.220.20  

anglisht   frëngjisht  

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 3613:2010

NOW

PUBLISHED
ISO 3613:2021
90.20 Standard under periodical review
15 pri 2026

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