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http://dx.doi.org/10.5916/jkosme.2016.40.6.510

A study on the performance of the sacrificial anode used for cathodic protection of a marine bridge after 8 years  

Jeong, Jin-A (Department of Ship Operation, Korea Maritime and Ocean University)
Ha, Ji-Myung (Conclinic.ltd)
Lee, Du-Young (Department of Marine Engineering, Korea Maritime and Ocean University)
Lee, Sang-Deuk (Department of Ship Operation, Korea Maritime and Ocean University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.40, no.6, 2016 , pp. 510-515 More about this Journal
Abstract
Recently, corrosion occurred on the piles of a marine bridge located on the NamHae expressway in Korea. A sacrificial anode cathodic protection system was installed to prevent corrosion damage in the marine bridge. In the case of the marine bridge in this study, the sacrificial anode cathodic protection system was applied at the tidal and splash zones of the piles because the upper part of the structure was not corroded, and because corrosion occurs at the tidal and splash zones due to sea tides. To verify the performance of the sacrificial anode cathodic protection system 8 years later, cathodic protection (CP) current, CP potential, and degree of depolarization were measured. The experimental results on the performance of the sacrificial anode cathodic protection system from a total of 60 piles were classified into 4 categories: good CP effect results (13 piles), partial CP effect results (27 piles), temporarily erroneous results (5 piles), and need for maintenance because of delamination (15 piles). It was determined that additional repairs are required, such as the application of bulk anodes and jacket casings, for piles where the CP effect is poor.
Keywords
Sacrificial anode; Cathodic protection; Depolarization; Current; Potential;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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