|
| Comparison on Marine Corrosion Behavior of 10CrNi3MoV Steel in Typical Harbors of China |
| Received:October 24, 2018 Revised:April 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.04.003 |
| KeyWord:low alloy steel marine environment corrosion biofouling corrosion product |
| Author | Institution |
| FAN Lin |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| DING Kang-kang |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| WANG Rui |
2. Unit 91922, PLA, Sanya , China |
| GUO Wei-min |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| HOU Jian |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| LIN Cun-guo |
1. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To comparatively research corrosion behaviors of 10CrNi3MoV low alloy steel in the marine envi-ronment of typical harbors of the Huanghai Sea, the East China Sea and the South China Sea. Methods The field corrosion tests of 10CrNi3MoV low alloy steel were performed in the harbor seawater of Qingdao, Zhoushan and Sanya. The observation of the corrosion morphology and the measurement of the corrosion rate and pitting depth were conducted. Combined with the monitoring of the marine environment factors and the XRD results of the corrosion product, the corrosion mechanism of 10CrNi3MoV steel was discussed. Results 10CrNi3MoV steel experienced mainly general corrosion in the Qingdao harbor, while pitting was the major corrosion form in Zhoushan and Sanya. The corrosion rate of the steel was influenced under the mixed effect of seawater temperature, salinity, dissolved oxygen concentration and sediment erosion. With the decrease of the harbor latitude, the corrosion rate of the steel increased. The attached fouling organism was a key factor that affected the pitting behavior of the steel. The steel had higher pitting depth in the harbor of Zhoushan and Sanya where the adhesion rate of the fouling organism was high. Conclusion The galvanic couple effect formed between the adhesion region and the non-attached region caused the separation of the interface between the cathodic and anodic reaction. The anodic dissolution in the occluded area beneath the attached organism is accelerated by the cathodic depolarization of the protective α-FeOOH product. |
| Close |
|
|
|