This International Standard specifies methods for the determination on zinc and cadmium of :
— the presence of colourless11 chromate conversion coatings;
— the presence and quantity of hexavalent chromium in colourless and coloured coatings;
— the total chromium content per unit area;
— the satisfactory adhesion of coloured coatings.
These methods are applicable only to chromate conversion coatings which are free from any supplementary coating, such as oil, water or solvent-based polymers, or wax.
A method for the determination of mass per unit area of both colourless and coloured chromate conversion coatings and for the neutral salt spray test are specified in ISO 3892 and ISO 3768 respectively and are listed in 3.5 and 3.7 for completeness.
SANS 3613:1980 history
0000 SANS 3613-2008
1980SANS 3613:1980 Chromate conversion coatings on zinc and cadmium - Test methods