| 摘要: |
| 利用新设计的模拟海底沉积物腐蚀环境的电解池，研究动电位极化法评价海底土（1988年7月采于辽东湾）腐蚀性的可行性。结果表明，该方法能显示出当材料表面状态不同时以及当海土温度和电阻率变化时电极过程的差异，可用于海底土腐蚀性的测试。 |
| 关键词: 动电位极化法 海底土 腐蚀性 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院重大项目,87－18－04号 |
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| POTENTIODYNAMIC POLARIZATION METHOD FOR EVALUATING CORROSIVENESS OF SEA BED SEDIMENT |
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Ji Mingtang1, Lu Changshan2, Yang Fangying1, Ni Xiangyu1
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1.Institute of Occanology. Academia Sinica, Qingdao 266071;2.China Offshore Oil Depelopment and Effgineering Corporation, Tianjin 300452
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| Abstract: |
| A cell designed to produce an anaerobic experimental environment modeling sea bed sediments was used to test two kinds of steel (A3, and API5LX) exposed to various Liaodong Bay sea bed sediment in 1988. The respective corrosion behavior of coated, rusted and bare A3 steel surfaces in the same mud was investigated using potentiodynamic polarization method to obtain their polarization curves under various corrosion environment determined.
Potentiodynamic polarization experiments were conducted at scan rates of 5 mV/s and one steel sample was polarized both anodically and cathodically in one measurement to avoid confusion caused by locally differing two sediment samples.
The results show that this technique is sensitive to variations in surface corrosion condition of the steel sample, types of sediments, temperature, resistivity of sediments etc.. The system can be used for comparison between different sediments corrosiveness and determining the corrosion behaviour difference of the same kinds of steel with various surface conditions and exposed to the same corrosion environment. The authors suggest that this technique is useful for evaluating corrosiveness of sea bed sediments and determining corrosion control parameters of steel in anaerobic mud. |
| Key words: Potentiodynamic polarization method, Sea bed sediments, Corrosiveness |
