| 韦博鑫,许进,高立群,台闯,于长坤,孙成,王振尧.交流杂散电流对X80管线钢的腐蚀行为影响[J].装备环境工程,2021,18(4):21-27. WEI Bo-xin,XU Jin,GAO Li-qun,TAI Chuang,YU Chang-kun,SUN Cheng,WANG Zhen-yao.Effect of AC Stray Current on Corrosion Behavior of X80 Pipeline Steel[J].Equipment Environmental Engineering,2021,18(4):21-27. |
| 交流杂散电流对X80管线钢的腐蚀行为影响 |
| Effect of AC Stray Current on Corrosion Behavior of X80 Pipeline Steel |
| 投稿时间：2021-03-08 修订日期：2021-03-19 |
| DOI：10.7643/issn.1672-9242.2021.04.003 |
| 中文关键词: 酸性土壤 交流杂散电流 电化学阻抗谱 点蚀中图分类号:TG172 文献标识码:A 文章编号:1672-9242(2021)04-0021-07 |
| 英文关键词:acidic soil alternating stray current electrochemical impedance spectroscopy pitting |
| 基金项目:国家自然科学基金项目(51871228，51771213，51471176) |
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| Author | Institution |
| WEI Bo-xin | Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China |
| XU Jin | Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
| GAO Li-qun | Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
| TAI Chuang | Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
| YU Chang-kun | Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
| SUN Cheng | Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
| WANG Zhen-yao | Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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| 中文摘要: |
| 目的 研究交流杂散电流干扰下管线钢的腐蚀机理。方法 采用电化学阻抗谱(EIS)、动电位极化扫描(Tafel)等电化学测试技术和表面分析技术研究不同交流电流密度干扰下(0~80 A/m2)X80管线钢在酸性土壤环境中的腐蚀行为。结果 酸性土壤环境中，即使是10 A/m2的交流电流密度，也会引起X80的交流腐蚀，且钢的腐蚀速率随着交流电流密度的增大而增大。未施加交流电干扰时，钢试样在酸性土壤浸出液中的腐蚀电流密度为9.6 μA/cm2；当施加10 A/m2的交流电后，试样的腐蚀电流密度增大到11.95 μA/cm2；当干扰交流电流密度增大到80 A/m2时，腐蚀电流密度为未施加交流电试样腐蚀电流密度的2.25倍。质量损失结果进一步验证了电化学测试结果，当干扰交流电流密度增大到80 A/m2时，腐蚀速率是未施加交流电试样腐蚀速率的3.5倍。X80钢在酸性土壤环境中主要发生点蚀，交流杂散电流进一步加速了X80钢的点蚀。结论 交流电的引入影响了X80钢的电化学腐蚀过程，交流电正半周期钢试样发生氧化反应，而在负半周期钢试样表面发生还原反应。在整个交流电作用的过程中，交流电正半周期的阳极氧化作用远大于负半周期的阴极还原作用。 |
| 英文摘要: |
| To study the corrosion mechanism of pipeline steel under the interference of alternating current (AC). Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization scanning (Tafel), and surface analysis techniques were used to study the corrosion behavior of X80 pipeline steel in acid soil environment under different AC current density (0 ~ 80 A/m2). In acid soil environment, the AC corrosion of X80 can be enhanced even with the AC current density of 10 A/m2, and the corrosion rate of steel increased with the increase of AC current density. The results showed that the corrosion current density of steel coupon in acid soil solution was 9.6 μA/cm2 without AC interference, however, it increased to 11.95 μA/cm2 when the 10 A/m2 AC was applied. When the AC current density increased to 80 A/m2, the corrosion current density was 2.25 times of that without AC. The weight loss further verified the electrochemical test results. When the AC current density increased to 80 A/m2, the corrosion rate was 3.5 times that of the non-interfered coupon. Pitting corrosion of X80 steel mainly occured in acid soil environment, and the AC stray current further enhanced the pitting corrosion of X80 steel. The electrochemical corrosion process of X80 steel is affected by the introduction of AC. In the positive half-cycle of AC, oxidation reaction occurs, while reduction reaction occurs in the negative half-cycle of AC. In the whole process of AC, the anodic oxidation of positive half-cycle is much greater than the cathodic reduction of negative half-cycle. |
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