CP systems for steel reinforced concrete bridges

Conference · Wed Dec 31 23:00:00 EST 2003

OSTI ID:898998

Bullard, Sophie J; Cramer, Stephen D; Covino, Jr, Bernard S; Holcomb, Gordon R; Ziomek-Moroz, Margaret; Soltesz, Steven M ^[1]

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1. Oregon Dept. of Transportation

Thermal-sprayed zinc anodes are used for cathodic protection (CP) systems in Oregon?s reinforced concrete coastal bridges to prevent chloride-induced corrosion damage. Thermal-sprayed zinc performs well as an ICCP anode but the service life of the zinc anode is directly related to the average current density used to operate the systems. Oregon Department of Transportation (DOT) is investigating ways of monitoring the rebar corrosion in reinforced concrete bridges to identify conditions when protection of the rebar is needed. This approach reflects the fact that external protection may not be needed for all environmental conditions, leading Oregon DOT to examine the use of intermittent, galvanic, and constant voltage cathodic protection systems. Results from these types of systems are reported.

• Research Organization: Albany Research Center (ARC), Albany, OR
• Sponsoring Organization: USDOE - Office of Fossil Energy (FE)
• OSTI ID: 898998
• Report Number(s): DOE/ARC-2004-018
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANODES
BRIDGES
CATHODIC PROTECTION
CORROSION
CURRENT DENSITY
ICCP
MONITORING
REINFORCED CONCRETE
SERVICE LIFE
STEELS
US DOT
ZINC
cathodic protection
constant voltage
galvanic
intermittent
reinforced concrete
thermal spray
zinc