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Application of Macrocell Sensor System for Monitoring of Steel Corrosion in Concrete Structure Exposed to Marine Environment  

Lee, Seung-Tae (Department of Civil Engineering, Kunsan National University)
Moon, Dae-Joong (EJ-Tech)
Kim, Wan-Jong (EJ-Tech)
Moon, Jae-Heum (Korea Institute of Construction Materials)
Kim, Hak-Soo (Department of Civil and Environmental Engineering, Honam University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.22, no.4, 2010 , pp. 241-247 More about this Journal
Abstract
Corrosion of steel embedded in concrete is one of the foremost factors that affect the durability of concrete structures in marine environments. This paper presents an application technique of anode-ladder-system to evaluate corrosion behaviours of marine concrete structure. In order to investigate the behaviours quantitatively, the measurement of potential and current was performed on the concrete elements subjected to the penetration and diffusion of chloride ions. The main variable was the heights from seawater level; namely 3.7, 6.0 and 8.2 m. As a result of the monitoring, it was found that the corrosion characteristics differently behaved with the increasing height. Additionally, through migration test, the relationship between compressive strength of concrete and diffusivity of chloride ions was observed. It is suggested, ultimately, that in order to reduce or mitigate steel corrosion, both appropriate concrete cover depth and high-quality of concrete in early ages should be done.
Keywords
macrocell sensor; anode-ladder-system; chloride; steel corrosion; marine environment;
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