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Title |
Correlation of Surface Chloride and Corrosion Amount for Steel Member Exposed in Marine Environment
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Authors |
하민균(Min-Gyun Ha) ; 허창재(Chang-Jae Heo) ; 유훈(Hoon Yoo) ; 안진희(Jin-Hee Ahn) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.4.45 |
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Keywords |
해양환경; 강부재; 부식환경; 표면염분; 부식량 Marine environment; Steel member; Corrosive environment; Surface chloride; Corrosion amount |
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Abstract |
In this study, to analyze the correlation of surface chloride and corrosion amount level according to the installation location of steel members exposed to the marine environment, the surface chloride and mean corrosion depth were evaluated by member units for box girder members of the offshore steel bridge and box specimens. The surface chloride was measured monthly using the Bresle method for one year. The corrosion amount was evaluated by converting the weight loss due to corrosion products generated in the monitoring steel plate into mean corrosion depth. As a measurement result of the surface chloride and corrosion amount, relative differences in surface chloride and mean corrosion depth were appeared depending on the shape or installation location of the steel members. Moreover, even if members of the same shape were installed in the same bridge, it was confirmed that the corrosion amount was increased locally and rapidly. The tendency of corrosion amount depending on the surface chloride was evaluated to analyze the correlation between surface chloride and corrosion amount, and the relation equations that can asseses the corrosion amount depending on the surface chloride were analyzed. From the results of the correlation between surface chloride and corrosion amount, it was found that the corrosion amount of the steel member affected by the surface chloride was varied up to about 1.15 times depending on the structural detail.
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