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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
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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

PUBLISH DATE 2021
ISO 3613:2021

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.
SDO ISO: International Organization for Standardization
Document Number ISO 3613
Publication Date May 1, 2021
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 107
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