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| Corrosion Regularity of Stainless Steel in Deep-sea Environment of the Western Pacific Ocean |
| Received:March 09, 2023 Revised:April 27, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.08.010 |
| KeyWord:deep-sea environment stainless steel real sea experiment corrosion morphology corrosion rate pit depth |
| Author | Institution |
| LIU Zhao-hui |
Luoyang Ship Material Research Institute, Henan Luoyang , China |
| PENG Wen-shan |
Luoyang Ship Material Research Institute, Henan Luoyang , China;State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| DING Kang-kang |
Luoyang Ship Material Research Institute, Henan Luoyang , China;State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| ZHAO Jian-cang |
Luoyang Ship Material Research Institute, Henan Luoyang , China;State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| LI Zhi |
Luoyang Ship Material Research Institute, Henan Luoyang , China |
| GUO Wei-min |
Luoyang Ship Material Research Institute, Henan Luoyang , China;State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| MA Li |
Luoyang Ship Material Research Institute, Henan Luoyang , China;State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
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| Abstract: |
| The marine equipment is prone to seawater corrosion in the deep-sea environment of the Western Pacific Ocean which is a global hot spot. The work aims to study the corrosion regularities of stainless steel in the deep-sea environment of the Western Pacific Ocean. A deep-sea high efficiency string test device was used to carry seacorrosion experiments on 304 stainless steel and 316L stainless steel in the Western Pacific Ocean. The corrosion morphology, corrosion rate, and pitting depth regularities of stainless steel were analyzed. The corrosion regularities of these two stainless steels at sea depths of 500, 800, 1 200 and 2 000 m were investigated. The results showed that the corrosion weight loss of 304 stainless steel and 316L stainless steel was mainly caused by crevice corrosion, and overall, the corrosion degree of 316L stainless steel was lower than that of 304 stainless steel; The corrosion rate of 304 stainless steel was lower than 0.4 mm/a, and the corrosion rate of 316L stainless steel was lower than 0.25 μm/a. The corrosion products of 304 stainless steel in the deep-sea environment mainly contained α-Fe2O3, γ-FeOOH and γ-Fe2O3.The corrosion products of 316L stainless steel mainly contained α-FeOOH, γ-FeOOH and γ-Fe2O3. The formation of crevices should be avoided during the use of 304 stainless steel and 316L stainless steel in the Western Pacific Ocean environment to reduce the probability of crevice corrosion and pitting. |
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