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| Corrosion Behaviors of Welded Low-alloy Hull Steel |
| Received:April 01, 2017 Revised:June 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2017.06.019 |
| KeyWord:SVET weldment low-alloy steel seawater corrosion |
| Author | Institution |
| ZHANG Peng-hui |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| GU Liang-hua |
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 |
| PANG Kun |
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 |
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| Abstract: |
| Objective To study corrosion behaviors of low-alloy hull steel in seawater. Methods Corrosion behaviors of low-alloy hull steel were studied by metallurgical structure observing, potentiodynamic scanning, electrochemical impedance spectroscopy (EIS), and scanning vibration electrode test. Results There was obvious difference among metallographic structures in basement zone (BZ), heat-affected zone (HAZ) and weld zone (WZ). HAZ tended to have corrosion firstly, while the corrosion resistance of which was the lowest. And there was the probability of galvanic corrosion between HAZ and BZ. The result of SVET showed that the highest anodic current appeared in HAZ, and concentrated near BS as the time went on. Conclusion There are obvious differences among metallurgical structures in different zones, while HAZ turns out to be prior to corrode. Anodic reaction occurs at HAZ, and the max anodic current and corrosion increase with time. |
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