This International Standard 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.
