|
| Erosion-corrosion Behavior of 40Cr Steel in Sandy Seawater |
| Received:January 24, 2019 Revised:March 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.03.003 |
| KeyWord:erosion-corrosion 40Cr steel seawater sand |
| Author | Institution |
| LIU Xue-jian |
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan , China; 2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, CSIC, Qingdao , China |
| PENG Wen-shan |
2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, CSIC, Qingdao , China |
| LIU Shao-tong |
2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, CSIC, Qingdao , China |
| SONG Hong-qing |
2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, CSIC, Qingdao , China |
| QIU Ri |
2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, CSIC, Qingdao , China |
| CHENG Xu-dong |
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan , China |
| HOU Jian |
2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, CSIC, Qingdao , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To research the erosion corrosion performance of 40Cr steel in actual seawater. Methods The experiment was carried out with a self-made rotary scouring experimental apparatus to simulate the actual marine environment to test 40Cr steel. The test medium was natural seawater of Qingdao which containing 0.15%, 0.3%, 1% quartz sand (about 300 mesh), and the flushing flow rates were 1 m/s, 3 m/s and 5 m/s, respectively. The erosion corrosion performance was measured by AC impedance spectrum and polarization curve. The corrosion rate was measured by the weight loss method. The surface morphology was observed by scanning electron microscopy. And the corrosion product composition was analyzed by XRD and EDS. Results When the flow rate was constant, the sand content was 0.3%, and the corrosion weight loss rate was the smallest. The combination of AC impedance spectrum and polarization curve showed that the corrosion resistance was the highest, and the corrosion product was FeO(OH). As the flow rate increased, the corrosion loss rate of the sample increased rapidly, and the corrosion resistance decreased gradually. The mainly corrosion product composition was FeO(OH). Conclusion The flow rate has a great influence on the erosion-corrosion rate of 40Cr, while the sand content has little effect on the erosion-corrosion rate. |
| Close |
|
|
|