|
| Seawater Corrosion Behavior of High-strength Steel under the Coupling Effect of Temperature and Stress |
| Received:January 05, 2024 Revised:March 05, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.04.014 |
| KeyWord:simulated marine environment temperature high-strength steel stress corrosion morphology pit depth |
| Author | Institution |
| SUN Jiayu |
Research Institute, CNPC Urumqi Petrochemical Company, Urumqi , China;National Key Laboratory of Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| PENG Wenshan |
National Key Laboratory of Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to clarify the service state of marine Ni-Cr-Mo-V high-strength steel at different seawater temperature, in order to ensure the safety of ship equipment. In the laboratory simulation environment, different stresses were applied to Ni-Cr-Mo-V high-strength steel by four-point bending device. Combined with electrochemical test, corrosion morphology and product analysis, the effect of temperature and stress coupling on the corrosion behavior of Ni-Cr-Mo-V high-strength steel in seawater environment at different temperature was studied. The increase of temperature accelerated the formation of corrosion products of Ni-Cr-Mo-V high-strength steel, but in high temperature seawater, the pitting corrosion of high-strength steel was reduced to uniform corrosion, so no increasingly serious pitting corrosion was found when external stress was applied to high-strength steel in seawater at high temperature. The content of Cr and Ni in the corrosion product layer of high-strength steel increased in high temperature seawater compared with low temperature seawater. The stress applied in low temperature seawater caused the content of Cr and Ni in the corrosion product layer to decrease, while the stress applied in high temperature seawater had little effect on the composition of corrosion products. The corrosion effect of temperature on Ni-Cr-Mo-V high-strength steel was obviously stronger than that of applied stress. In seawater at different temperature, high temperature reduces the corrosion resistance of Ni-Cr-Mo-V high-strength steel. However, compared with low temperature seawater, the stress applied in higher temperature seawater has little effect on the corrosion of Ni-Cr-Mo-V high-strength steel. Therefore, for the corrosion of high-strength steel in seawater, the effect of temperature on high-strength steel is obviously greater than that of stress. |
| Close |
|
|
|