|
| Corrosion Behaviors of Two Kinds of Low Alloy Steels in Deep-sea Environments |
| Received:December 25, 2018 Revised:April 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.04.005 |
| KeyWord:low alloy steel seawater corrosio deep sea |
| Author | Institution |
| GUO Wei-min |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| DING Kang-kang |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| CHENG Wen-hua |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| HOU Jian |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| LIU Shao-tong |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| FAN Lin |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| XU Li-kun |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To investigate corrosion behaviors and rules of two kinds of low alloy steels in deep-sea environments. Methods Through the deep-sea field exposure test, corrosion behaviors of 10CrNi3MoV and E47 low alloy steels exposed for 0.5 a and 2 a at 1200 m, 2000 m and 3000 m depth of the sea were studied. With the help of 3D video microscope and XRD technology, the corrosion morphology observation and corrosion product composition analysis were done, and the corrosion kinetic data were also used to compare their corrosion resistance performance. Results The corrosion products had a two-layer sructure, and the surface under the rust layers was relatively flat, distributed with a lot of small pits. With the increase of depth, the number of pits increased. In the initial stage of corrosion, the corrosion rate and pitting depths were the lowest at 2000 m. With the exposure time went on, the content of α-FeOOH in the rust layer increased obviously, while the corrosion rate showed a decreasing trend. Conclusion The deep-sea corrosion resistance of 10CrNi3MoV is inferior to that of E47. In the early stage, deep-sea corrosion at 2000 m is slight for both, while the sea depth increase contributes to the pitting nucleation process. Over time, the rust layer has a certain protective effect on the substrate, and the resisitance of pitting growth to depth direction increases. |
| Close |
|
|
|