Abstract
In order to develop surface state monitoring methods for weathering steel bridges with supplemental rust controlling surface treatment, investigations of a model bridge made of weathering steels exposed to severe marine environment for 14 years were carried out. Various values obtained by non-destructive methods such as visual inspection, ion transfer resistance measurement, rust thickness measurement, residual metal thickness measurement were compared with those obtained by destructive methods such as cross sectional optical microscope observation, and electron probe micro analyses in terms of rust states. In doing so, useful fundamental data in terms of degradation analyses for weathering steel structures have been accumulated. Also, validity of the nondestructive methods including the ion transfer resistance measurement was confirmed.
