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| Analysis of the Spatial Variability of the Initial Corrosion Rate of Three Steel in the East China Sea |
| Received:July 13, 2021 Revised:August 07, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.10.011 |
| KeyWord:East China Sea corrosion typical steel geostatistical analysis spatial variation characteristics |
| Author | Institution |
| MA Shao-zheng |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;University of Chinese Academy of Sciences, Beijing , China;Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology, Qingdao , China |
| SUN Hu-yuan |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology, Qingdao , China |
| SUN Li-juan |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology, Qingdao , China |
| WANG Zhao |
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;University of Chinese Academy of Sciences, Beijing , China;Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology, Qingdao , China |
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| Abstract: |
| To study the initial corrosion rate of X80, EH36 and 45# steel at 42 stations in the East China Sea, in this paper, the initial corrosion rate of X80, 45# and EH36 steel measured in the East China Sea in September 2019 were obtained by the potential polarization curve method. The data was analyzed by geostatistics to explore the spatial distribution and variation characteristics of the initial corrosion rate of the three steels in the study area, and draw the initial corrosion rate prediction map. The spatial distribution characteristics of the initial corrosion rate of each type of steel are as follows:the spatial distribution of the initial corrosion rate of 45# steel is higher in the southwest and lower in the northeast; the spatial distribution of the initial corrosion rate of EH36 steel is higher in the northeast, lower in the southwest; while the spatial distribution of the initial corrosion rate of X80 steel is obviously lower in the seas close to the Yangtze River estuary, and higher in other seas. The distribution of the initial corrosion rate of the three steels presents different characteristics. At the same time, statistical analysis shows that the average initial corrosion rate of the three steels in the East China Sea is 0.42 mm/a for X80, 0.49 mm/a for 45#, and 0.17 mm/a for EH36. In addition, the spatial variability of the initial corrosion rate distribution of the three steels in the East China Sea is obvious, and the spatial autocorrelation is strong. The nugget values of X80, 45# and EH36 are 0.0148, 0.0044, and 0.0017, respectively, and the range is between 1000~2000 km. |
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