| LIU Shuan,WANG Juan,CHENG Hong-hong,NAN Feng,GUO Xiao-ping,CHENG Qing-li,PU Ji-bin,WANG Li-ping.Corrosion Mechanism and Protective Measures of Inner Wall Baseplate of Large Crude Oil Storage Tank[J],46(11):47-54 |
| Corrosion Mechanism and Protective Measures of Inner Wall Baseplate of Large Crude Oil Storage Tank |
| Received:May 04, 2017 Revised:November 20, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.11.007 |
| KeyWord:crude oil tank baseplate corrosion sedimentary water corrosion mechanism cathodic protection heavy-duty anti-corrosive coating |
| Author | Institution |
| LIU Shuan |
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
| WANG Juan |
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
| CHENG Hong-hong |
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
| NAN Feng |
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
| GUO Xiao-ping |
Wuhu Spring Breeze New Material Co. Ltd, Wuhu , China |
| CHENG Qing-li |
SINOPEC Qingdao Research Institute of Safety Engineering, Qingdao , China |
| PU Ji-bin |
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
| WANG Li-ping |
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo , China |
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| Abstract: |
| Caseplate corrosion is a key issue affecting and determining service life of large-scale crude oil storage tank. Crude oil itself is noncorrosive, however, water and certain corrosive medium are usually mixed up with oils during exploitation process. “Water sinks and oil floats” during long-term storage, corrosive sedimentary water deposits on the bottom of oil tank, hence the tank bottom has been immersing in sedimentary water for a long term. Chemical composition of the sedimentary water is complex, which contains plenty of chloride, sulfate and anaerobic microorganisms. The mediums expose the oil tank bottom to strong corrosive environment and cause continuous corrosion to oil tank baseplate. Meanwhile, shock and vibration of the floating roof tank column, liquid turbulence and crude oil pressure will accelerate corrosion failure of oil tank baseplate. Corrosion mechanism and failure derivation mechanism of the oil tank bottom were discussed in detail; corrosion forms of tank bottom in sedimentary water environment were analyzed, including electrochemical corrosion, erosion corrosion, stack corrosion, microbial corrosion and weld corrosion; development status of heavy-duty anti-corrosive coating was introduced, including epoxy, polyurethane, zinc rich primer, fluorocarbon coatings; heavy-duty anti-corrosive coating technologies adopted by oil tank protection were analyzed; finally future research directions of oil tank baseplate protection was presented. |
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