Analysis of AC and DC Interference in One Buried Gas Pipeline
文献类型：期刊论文
| 作者 | Wang, Zaifeng1,2,3; Liu, Haishan1; Liu, Jianqing1; Liu, Yang1; Ding, Yu1; Zhang, Jie3 |
| 刊名 | COATINGS
 |
| 出版日期 | 2025-09-09 |
| 卷号 | 15期号:9页码:17 |
| 关键词 | AC interference DC interference AC voltage DC potential current density decoupler corrosion products interference time time series mappings interference sources |
| ISSN号 | 2079-6412 |
| DOI | 10.3390/coatings15091056 |
| 通讯作者 | Wang, Zaifeng(wangzf1@cnooc.com.cn) ; Zhang, Jie(zhangjie@qdio.ac.cn) |
| 英文摘要 | The complex interference created by several sources for pipelines has not been sufficiently studied. In this study, four types of interference sources were monitored and analyzed. AC voltage monitoring, DC potential monitoring, current density monitoring, and excavation observation and measurement for test pieces and the decouplers were employed to assess the AC/DC interference of one real buried pipeline in situ. The peak value obtained from the second measurement at Pile 33 decreased from 1341.8 V to 143.7 V, indicating that the 1341.8 V in the first measurement may be caused by a sudden grounding of the electrode, while the 143.7 V may be caused by the normal induced voltage. The most negative DC interference potential between the pipeline and the Cu/CuSO4 reference electrode was -11.946 V. The most positive DC interference potential between the pipeline and the Cu/CuSO4 reference electrode was 4.862 V. Pile 3 had a maximum DC current density of 240 mA/m2, and Pile 4 had a maximum AC current density of 0.615 A/m2. After excavating the test piece at Pile 3, the point with maximum DC interference, there were obvious pitting corrosion characteristics, and the corrosion products were mainly gamma-FeOOH and Fe3O4. It indicated that the coupling of long-term higher positive DC current density or (DC potential) and short-term higher transient AC voltage or (AC current density) may lead to corrosion. After excavating the test piece at the point with maximum AC interference, namely, Pile 4, there were no significant AC or DC corrosion characteristics. This finding suggested that the combination of long-term low AC current voltage or (low AC current density) and long-term more negative low DC current density or (DC potential) did not result in obvious corrosion. The decouplers in this measurement significantly reduced AC interference above 2 V, but the isolation of transient AC shocks and AC interference below 2 V were not significant. During analysis of AC and DC interference, in addition to considering the value of the interference, the duration time of the interference was also an important factor. Instantaneous sharp peaks cannot represent the long-term average voltage or potential current density. The average value should be used as the main basis for judgement, and the instantaneous value should be used as the secondary basis for judgement. |
| WOS关键词 | DIFFERENT WATER CONTENTS ; CORROSION BEHAVIOR ; METALLIC PIPELINES ; X80 STEEL ; SOIL |
| 资助项目 | Major Basic Research Project of Natural Science Foundation of Shandong Province, China ; National Natural Science Foundation of China[42076043] ; [ZR2023ZD31] |
| WOS研究方向 | Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001579667600001 |
| 出版者 | MDPI |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/203446]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Wang, Zaifeng; Zhang, Jie |
| 作者单位 | 1.China Natl Offshore Oil Corp, Beijing 100027, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Zaifeng,Liu, Haishan,Liu, Jianqing,et al. Analysis of AC and DC Interference in One Buried Gas Pipeline[J]. COATINGS,2025,15(9):17. |
| APA | Wang, Zaifeng,Liu, Haishan,Liu, Jianqing,Liu, Yang,Ding, Yu,&Zhang, Jie.(2025).Analysis of AC and DC Interference in One Buried Gas Pipeline.COATINGS,15(9),17. |
| MLA | Wang, Zaifeng,et al."Analysis of AC and DC Interference in One Buried Gas Pipeline".COATINGS 15.9(2025):17. |
入库方式： OAI收割
来源：海洋研究所
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