This International Standard specifies two accelerated corrosion test procedures, Methods A and B, for the evaluation of corrosion behaviour of surface-treated metals and their alloys with and without paint on them in atmospheric environments. It also specifies the apparatus used. The two tests involve salt deposition and dry/wet conditions at a constant absolute humidity. Method A applies to: metals and their alloys (including corrosion-resistance alloys) Method B applies to: metals and their alloys metals and their alloys with coatings [including metallic coatings (anodic or cathodic), organic coatings, and conversion coatings]