This International Standard specifies requirements relating to chromate conversion coatings on zinc and cadmium intended to give protection against corrosion. Finishes for giving par-ticular colours only or specifically to improve paint adhesion are not covered by this International Standard.
SIS SS-ISO 4520:1982 history
1982SIS SS-ISO 4520:1982 Chromate conversion coatings on electroplated zinc and cadmiumcoatings