Abstract
In maintenance management of a painted steel railway bridge, appropriate corrosion prevention measures are needed. For establishing effective corrosion prevention measures, it is important to make clear classifications of coating degradation patterns. Accordingly we made a lot of observations on coating films of numerous bridges. The results of the observations showed that a coating degradation could be classified into some patterns, and that the coating degradation patterns (such as corrosion under coating, checking of coating, and peering of coating) were affected by construction environment and bridge ages.
