Journal of Korean Port Research (한국항만학회지)
- Volume 12 Issue 1
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- Pages.145-154
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- 1998
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- 1225-0791(pISSN)
On the Corrosion Protection Characteristics of Port Steel Structures Corroded Naturally for a Long Period of Time
장기간 자연 부식된 항만부두 강구조물의 방식특성 연구
- Published : 1998.06.01
Abstract
Protection characteristics of the corroded steel pile which was served as a pier structure over 8 years in seawater have been examined in terms of corrosion potential, electrochemical impedance spectroscopy(EIS) and anodic/cathodic polarization curves. The steel structure was sectioned into two parts, waterline(splash zone, just above the seawater surface) and in-water(underwater), and protection characteristics for the two parts were investigated with the application of cathodic protection(CP) by sacrificial anodes using Zn and Al alloys. The main results obtained were as follows; (1) The corrosion potential of waterline zone was higher than that of in-water, which implied that the corrosion of waterline was more severe than that of in-water, (2) As a result of EIS examination, the transition period from the apparent CP to the substantial CP took about twenty to thirty days according to the corrosion condition.
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