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| Corrosion Behavior and Regularities of Two Stainless Steels in Seawater Environment of Different Harbors |
| Received:February 08, 2020 Revised:March 31, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.07.014 |
| KeyWord:stainless steel harbor full immersion zone seawater corrosion |
| Author | Institution |
| PENG Wen-shan |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| LIU Shao-tong |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| GUO Wei-min |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| DUAN Ti-gang |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| DING Kang-kang |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| HOU Jian |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| LIN Cun-guo |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
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| Abstract: |
| The paper aims to study the corrosion regularities of 304 stainless steel and 316L stainless steel in the seawater full immersion area for different periods in different harbors of China. The real sea full immersion experiment was carried out in the seawater of different harbors. The 3D video photography, weightless analysis and image processing technology were adopted to investigate the corrosion morphology, corrosion rate, pitting depth and marine organism coverage area of the stainless steels in the seawater of Qingdao harbor, Zhoushan harbor and Sanya harbor. The corrosion form of the two stainless steels were mainly pitting corrosion and crevice corrosion, and the 304 stainless steel surface also produced severe tunnel corrosion. The corrosion rate of 304 stainless steel and 316L stainless steel in different harbors was small, and the corrosion resistance of 316L stainless steel is better than that of 304 stainless steel. There was obviously difference for the surface morphology of the samples in these three harbors. The surface of the samples in Sanya harbor had the largest marine organisms’ coverage area; the surface of the samples in Zhoushan harbor was attached with a lot of mud. The corrosion rate of the two stainless steels in Sanya harbor was smaller than that in Zhoushan harbor.Different harbor seawater environments have significant effects on the types and attachment areas of marine organisms on stainless steel surfaces, and the surface state of stainless steel directly affects the corrosion morphology. |
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