BSI BS EN ISO 3613:2021

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

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BSI BS EN 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
PAGES 20
BSI BS EN 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,

  • chromate coatings that are free from any supplementary coatings, such as oil, water or solvent-based polymers or wax.

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