ABSTRACT
The life cycle cost (LCC) included cost for maintenance is important factor when steel bridges are constructed in Japan. Bridges using the unpainted weathering steel are increased because it is able to reduce the painting cost when bridge is constructed and repainted. Under appropriate corrosive environment, the atmospheric corrosion resistance is demonstrated by rust of weathering steel. However, in marine coastal areas and frequent high rainfall, high humidity or persistent fog, weathering steel cannot have a corrosion resistance.
