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| Corrosion of Reinforced Concrete in Marine Environment |
| Received:April 10, 2019 Revised:May 05, 2019 |
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| DOI：10.7643/issn.1672-9242.2020.04.016 |
| KeyWord:reinforced concrete biological corrosion chloride ion local corrosion |
| Author | Institution |
| LIU Ke |
Key Laboratory of Marine Environment Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;School of Material Science and Engineering, China University of Petroleum, Qingdao , China |
| ZHANG Jie |
Key Laboratory of Marine Environment Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;Open Studio for Marine Corrosion and Protection, Pilot Qingdao National Laboratory for Marine Science and Technology, Qingdao , China |
| LI Yan |
School of Material Science and Engineering, China University of Petroleum, Qingdao , China |
| YU Feng-kai |
Key Laboratory of Marine Environment Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;Open Studio for Marine Corrosion and Protection, Pilot Qingdao National Laboratory for Marine Science and Technology, Qingdao , China |
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| Abstract: |
| The paper aims to research the corrosion behavior of reinforced concrete in real marine environment. In this paper, the attachment of organisms on the surface of reinforced concrete immersed in seawater of Qingdao for one year was recorded, and the influences of fouling organism in marine environment on corrosion of the concrete matrix were tested and analyzed by means of XRD, etc. The critical chloride ion content of rebar in marine environment was monitored by measuring the chloride ion content. Simultaneously, the electrochemical parameters such as pitting potential and polarization resistance of steel bar immersed in seawater for one year was tested by potentiodynamic polarization. The corrosion morphology of rebar was observed by SEM to monitor the corrosion of the rebar. Marine fouling organisms resulted in the enrichment of heavy metal elements; the critical chloride ion content of reinforced concrete in the actual marine environment was 0.375%; the passivation state of reinforced concrete disappeared in the actual marine environment for 180 days, resulting in local corrosion. The organisms in seawater mainly affect the surface material of concrete, but have no effect on the corrosion of rebar. The main reason for the corrosion of rebar is the penetration of chloride ions. |
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