ISO 4611:2008

ISO 4611:2008 specifies the conditions of exposure of plastics to

damp heat;
water spray;
salt mist;

and the methods for the evaluation of the change in some significant characteristics after given exposure stages.
It is, in general, suitable for all plastics in the form of standard test specimens, and finished articles or parts thereof.
It considers separately methods for the determination of

change in mass;
change in dimensions and appearance;
change in physical properties.