Results from evaluation of decay of painted systems for wood, steel and galvanized steel after 1 and 2 years exposure.

The results of the 1 and 2 years of exposure of the painted systems for steel and wood is presented for all test sites in the exposure programme. A general description of the results together with a statistical treatment was performed. The damages were mainly observed on the parameters general appearance, dirt, chalking and fungus, for the steel samples also for damages in and around an artificial cut. The damages were generally small and dose-response relationships are difficult to find after such a short time as 2 years. Slight indications for increasing degradation were observed for the parameters SO2, NO2, precipitation and time of wetness, for chalking sunshine had influenced damage.