Corrpro on Board to Monitor & Maintain Florida's Cathodic Protection Systems

Date:June 2015
Market:Municipal Infrastructure Rehabilitation
Capability:   Cathodic Protection
Location:United States
cathodic protection

Structures in direct contact with coastal waters experience corrosion activity around the tidal and splash zone areas. Uncontrolled corrosion of reinforcing steel and prestressing strands in marine structures can decrease the life expectancy of a structure to a fraction of its design life.

Many of Florida’s coastal structures suffer from premature deterioration of substructure elements. The reinforcing steel or prestressing strands do not have a protective coating and overdriving of concrete piles during construction caused hairline cracks in the concrete that serve as a direct path for moisture, oxygen and chlorides to reach the reinforcing steel.

Faced with this deteriorating condition, the Florida Department of Transportation (FDOT) aggressively implemented a corrosion protection program to mitigate the corrosion process of substructure elements. Both impressed current and galvanic cathodic protection systems have been regularly installed since 1991, and as of today approximately 40 impressed current systems have been installed on coastal bridges on both the east and west coasts and throughout the Florida Keys.

Because impressed current systems require a low voltage DC power supply to be constantly on for the system to function properly, monitoring is required. The travel distance from the FDOT Corrosion Lab in Gainesville to various sites for monitoring proved overwhelming after a few years, so the decision was made to invest and install remote monitor units at all sites. Remote monitors allow engineers to access the rectifier and other equipment from anywhere with an internet connection.

As the number of installations grew, so did the number of remote monitors and the need to outsource the monitoring and maintenance of the systems. The FDOT awarded Corrpro a two-year contract beginning in July 2015 to perform this work. Under this contract, engineers from Corrpro’s Florida office perform the following scope of services:

  • Monthly remote monitoring and reporting of all sites statewide
  • Maintaining and upgrading the website for accessing the sites at
  • Visiting sites to maintain and upgrade equipment
  • Developing and installing new remotely-controlled equipment such as cameras, weather stations, scour monitors, tide elevation, etc., that can be used by engineers to assess bridge conditions

Corrpro currently manufactures and supplies the materials and equipment used today on FDOT impressed current system such as anodes, reference electrodes, rectifiers and remote monitors.


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