| 高含CO2油田腐蚀环境下16Mn管线钢电化学腐蚀行为 |
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| 引用本文： | 吕雷,杨志刚,李辉,王丹丹,马天奇.高含CO2油田腐蚀环境下16Mn管线钢电化学腐蚀行为[J].科学技术与工程,2023,23(34):14532-14538. |
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| 作者姓名： | 吕雷 杨志刚 李辉 王丹丹 马天奇 |
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| 作者单位： | 陕西延长石油（集团）有限责任公司研究院 |
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| 基金项目： | 国家重点研发计划(2018YFB0605500)；陕西省重点研发计划(2022GY-128)；延长石油集团科研计划(ycsy2022jcts-B-41) |
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| 摘 要： | 油田开发生产中,高CO2环境会引起集输管线严重腐蚀。为了给高CO2环境腐蚀防护方案提供技术依据,通过动电位极化扫描和电化学阻抗测试研究了温度、溶解O2对16Mn管线钢在高含CO2腐蚀环境下电化学腐蚀行为的影响。结果表明:随着温度的升高,16Mn钢的腐蚀电位减小,腐蚀倾向性增强,但腐蚀电流密度大大减小,表现出较好的抗温耐蚀性能;同样温度下,16Mn钢在饱和O2环境中相比无O2时极化曲线的腐蚀电流密度减小,交流阻抗谱的电荷传递电阻大大增加,且低温时更显著,表现出较好的低温抗氧耐蚀性能。
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| 关 键 词： | 16Mn管线钢 CO2腐蚀 溶解O2 极化曲线 交流阻抗 |
| 收稿时间： | 2023/1/5 0:00:00 |
| 修稿时间： | 2023/9/19 0:00:00 |
Electrochemical corrosion behavior of 16Mn pipeline steel in corrosive environment with high CO2-containing oilfield |
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| Lv Lei,Yang Zhigang,Li Hui,Wang Dandan,Ma Tianqi.Electrochemical corrosion behavior of 16Mn pipeline steel in corrosive environment with high CO2-containing oilfield[J].Science Technology and Engineering,2023,23(34):14532-14538. |
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| Authors: | Lv Lei Yang Zhigang Li Hui Wang Dandan Ma Tianqi |
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| Affiliation: | Research Institute of Shaanxi Yanchang Petroleum (Group) Company Ltd |
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| Abstract: | In the development and production of oilfields, the high CO2 environment will cause severe corrosion of the gathering and transportation pipelines. In order to provide technical basis for corrosion protection scheme in high CO2 environment, the effects of temperature and dissolved O2 on electrochemical corrosion behavior of 16Mn pipeline steel in high CO2 environment were studied by potentiodynamic polarization scanning and eiectrochemical impedance measurement. The results show that: with the increase of temperature, the corrosion potential of 16Mn steel decreases and the corrosion tendency increases, but the corrosion current density decreases greatly,showing excellent temperature and corrosion resistance; At the same temperature, the corrosion current density of the polarization curve of 16Mn steel in the saturated dissolved O2 environment is lower than that in the absence of dissolved O2, and the charge transfer resistance of the AC impedance spectrum is greatly increased, and the surface is more significant at low temperature, showing better low-temperature oxygen and corrosion resistance. |
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| Keywords: | : 16Mn pipeline steel CO2 corrosion dissolved oxygen polarization curve EIS |
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