Reference number
ISO 3613:2021
© ISO 2024
International Standard
ISO 3613:2021
Metallic and other inorganic coatings — Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys — Test methods
Edition 4
2021-05
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Published (Edition 4, 2021)

ISO 3613:2021

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CHF 63
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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 2021-05
    Stage
    : International Standard published [60.60]
  • Edition
     : 4
    Number of pages
     : 11
  • Technical Committee :
    ISO/TC 107
    ICS :
    25.220.20 
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