Abstract
This paper aims on developing flame for evaluating reinforced bar corrosion by crack width on cover concrete of RC structure. Relation between reinforced bar corrosion amount and corrosion crack width of RC specimens under various environmental condition was organized. Normalized exposing term and normalized corrosion amount by the term of exposed in sea water can predict corrosion amount under different exposed condition. Furthermore, relation between corrosion amount of reinforced bar and corrosion crack width under each two types moisture environment corresponded to splash zone and tidal zone.