Über den Einfluß der Bewitterung auf das Korrosionsverhalten unlegierter und niedriglegierter Stähle

Influence of weathering on the corrosion behaviour of unalloyed and low-alloy steels Accelerated weathering tests with plain carbon steel and low-alloy steels show that the influence of weathering is of considerable importance for the atmospheric corrosion. Attention has to be paid that the steel surfaces are never wet over a longer period of time. The faster the steels will be dry, the better is the long time behaviour of these materials. Frequent short wet periods, followed by dry phases lead to the formation of an increasingly better protective layer. By favorable weathering conditions the influence of the composition of the alloys is comparatively small. Metallographic and electrochemical tests further show that the corrosion protection is not only due to the formation of a compact macroscopic layer. Local passivation effects are significant as well.