Corrosion Performance of Prepainted Galvanized Steel After 8‐Year Outdoor Exposure Upon the Distance to the Seashore in Temperate Environment

The corrosion performance of line‐produced prepainted galvanized steel products was investigated upon the distance to the seashore in temperate environment over 8‐year exposure. The rate of underpaint corrosion from cut‐edge was estimated and depended on the agressiveness of the site and the angle of exposure. The delamination at cut‐edge in sheltered conditions can be predicted from corrosivity category on steel and zinc and may be connected to the distance to the seashore. The extent of blistering decreased when extending the distance to the seashore particularly in rinsed situations underlining the importance of seawater aerosols but also wetness and condensation for blistering formation and propagation.