Corrosion Environment Monitoring of Local Structural Members of a Steel Truss Bridge under a Marine Environment

Abstract

Corrosion environment monitoring was conducted on the structural members of a steel bridge truss in a marine environment. The corrosion depth measured on exposed monitoring steel plates and the galvanic corrosion current measured by Atmospheric Corrosion Monitoring sensors attached to structural members were used to evaluate the local corrosion environment of each type of structural member in the steel bridge truss. From the evaluation results, the corrosion environment of the horizontal structural member was found to be worse than those of the other members, indicating that the horizontal members should be the primary target for monitoring and maintenance efforts.