阴极保护条件对高压直流干扰下X80钢腐蚀行为的影响规律及作用机制
收稿日期: 2023-06-05
修回日期: 2024-01-19
网络出版日期: 2024-03-13
Effect and Mechanism of Cathodic Protection Conditions on the Corrosion Behavior of X80 Steel Under HVDC Interference
Received date: 2023-06-05
Revised date: 2024-01-19
Online published: 2024-03-13
近年来，埋地油气管道受到的高压直流干扰问题引起广泛关注，如何准确评估高压直流干扰对埋地金属管道带来的腐蚀影响，并进行有效的防护成为实际生产的迫切需求，但目前较少关注管道本身的阴极保护对高压直流干扰下腐蚀行为的作用。本工作通过实验室模拟实验，研究了高压直流干扰前阴极保护条件对高压直流干扰下X80钢腐蚀行为的影响。结果表明，在20 V直流干扰1 h作用下，未施加阴极保护时X80钢的腐蚀速率为170.81 μm/h，阴极保护预处理电位为-0.85、-0.95、-1.05及-1.20 V时，腐蚀速率分别为124.39、87.13、54.56及1.45 μm/h。通过表面产物膜层、电化学阻抗谱、极化特性等分析了不同阴极保护预处理电位对高压直流腐蚀行为的影响机制，结果表明，-0.85~-1.05 V下，直流干扰后试样产物主要是绿锈(GR1)和钙镁沉积层的混合物，试样腐蚀速率随阴极保护预处理电位逐渐负移而降低，原因是试样表面生成的钙镁沉积层质量逐渐升高；-1.20 V阴极保护极化电位下，腐蚀速率远小于其他电位的原因是试样在高阴极保护电位和高压直流干扰的综合作用下产生了钝化。
谷少杰 , 刘洋 , 李彩霞 , 胡上茂 , 杜艳霞 . 阴极保护条件对高压直流干扰下X80钢腐蚀行为的影响规律及作用机制[J]. 金属学报, 2025 , 61(6) : 917 -928 . DOI: 10.11900/0412.1961.2023.00238
Recently, the problem of high-voltage direct current (HVDC) interference suffered by buried oil and gas pipelines has attracted widespread attention among research communities. Hence, accurately assessing the corrosive impact of HVDC interference on buried metal pipelines and performing effective protection procedures for the prevention of such corrosion have become priority issues that need to be resolved for producing reinforced pipelines. To date, the effect of the cathodic protection of the pipeline on the corrosion behavior of X80 steel under HVDC interference has rarely been reported. Hence, in this study, the corrosion behavior of X80 steel without cathodic protection conditions before HVDC interference and the effect of these protection conditions on the corrosion behavior of X80 steel under HVDC interference were studied through laboratory simulation experiments. Results showed that the corrosion rate of X80 steel was 170.81 μm/h without cathodic protection under 20 V DC interference for 1 h. When the cathodic protection pretreatment potentials were -0.85, -0.95, -1.05, and -1.20 V, the corrosion rates were 124.39, 87.13, 54.56, and 1.45 μm/h, respectively. The effect of various cathodic protection pretreatment potentials on the corrosion behavior of X80 steel under HVDC interference was clarified based on the product surface membrane layer, polarization, and EIS results. For the cathodic protection pretreatment potential of -0.85 to -1.05 V, the sample products after HVDC interference mainly showed a mixture of green rust GR1, calcium, and magnesium deposits; the corrosion rate of the sample products decreased with the increasing negative cathodic protection pretreatment potential under DC interference due to the gradual increase in the quality of the calcium and magnesium deposited layer on the surface of the sample products. At -1.20 V cathodic protection polarization potential, the corrosion rate of the sample products was substantially lower than that at other potentials because passivation of the products occurred under the combined action of high cathodic protection potential and HVDC interference.
Key words： X80 steel; HVDC interference; cathodic protection; corrosion behavior
| 1 | Liao M F, Zhang X L, Xing X Y, et al. Research status and development trend of grounding current effect of UHVDC grounding electrode on corrosion of the metal pipelines [J]. High Volt. Appar., 2018, 54(7): 44 |
| 廖敏夫, 张晓莉, 邢小羽 等. 特高压直流接地极入地电流对金属管道腐蚀研究现状与发展趋势 [J] 高压电器, 2018, 54(7): 44 | |
| 2 | Cao G F, Gu Q L, Jiang Y T, et al. Current interference of HVDC ground electrode to buried pipelines and its personal safety distance [J]. Nat. Gas Ind., 2019, 39(3): 125 |
| 曹国飞, 顾清林, 姜永涛 等. 高压直流接地极对埋地管道的电流干扰及人身安全距离 [J]. 天然气工业, 2019, 39(3): 125 | |
| 3 | Ren Z P. China's new infrastructure research report (2022) [J]. Dev. Res., 2022, 39(6): 21 |
| 任泽平. 中国新基建研究报告(2022) [J]. 发展研究, 2022, 39(6): 21 | |
| 4 | Qin R Z, Du Y X, Jiang Z T, et al. Research status of interference of HVDC transmission system to buried metal pipelines [J]. Corros. Sci. Protect. Technol., 2016, 28: 263 |
| 秦润之, 杜艳霞, 姜子涛 等. 高压直流输电系统对埋地金属管道的干扰研究现状 [J]. 腐蚀科学与防护技术, 2016, 28: 263 | |
| 5 | Ying B. Influence of ground pole of HVDC system on safe operation of long distance transmission pipeline [J]. Oil-Gasfield Surf. Eng., 2014, 33(7): 23 |
| 应 斌. 高压直流输电系统接地极对长输管道安全运行的影响 [J]. 油气田地面工程, 2014, 33(7): 23 | |
| 6 | Xu Z C, Du Y Q, Du Y X, et al. Research status of interference caused by HVDC grounding in buried metal pipeline [J]. Corros. Prot., 2020, 41(3): 63 |
| 许振昌, 都业强, 杜艳霞 等. 高压直流接地极对埋地金属管道干扰的研究现状 [J]. 腐蚀与防护, 2020, 41(3): 63 | |
| 7 | Liang X M, Zhang P, Chang Y. Recent advances in high-voltage direct-current power transmission and its developing potential [J]. Power Syst. Technol., 2012, 36(4): 1 |
| 梁旭明, 张 平, 常 勇. 高压直流输电技术现状及发展前景 [J]. 电网技术, 2012, 36(4): 1 | |
| 8 | Caroli C E, Santos N, Kovarsky D, et al. Itaipu HVDC ground electrodes: Interference considerations and potential curve measurements during Bipole II commissioning [J]. IEEE Trans. Power Deliv., 1990, 5: 1583 |
| 9 | Nicholson P. High voltage direct current interference with underground/underwater pipelines [A], Corrosion 2010 [C]. San Antonio: NACE, 2010: 10102 |
| 10 | Wang Y B. Research on stray current drainage engineering of Sichuan gas transmission pipeline to the east [D]. Xi'an: Xi'an Shiyou University, 2010 |
| 王雁冰. 川气东送管道杂散电流排流工程技术研究 [D]. 西安: 西安石油大学, 2010 | |
| 11 | Li Z J. Field test and analysis of interference of high or ultra high voltage direct current transmission system to underground steel pipeline [J]. Corros. Prot., 2017, 38: 142 |
| 李振军. 高压/特高压直流输电系统对埋地钢质管道干扰的现场测试与分析 [J]. 腐蚀与防护, 2017, 38: 142 | |
| 12 | Li D D. Study on interference law of HVDC transmission line to a buried metal pipeline [D]. Chengdu: SouthWest Petroleum University, 2014 |
| 李丹丹. 高压直流输电线路对某埋地金属管道的干扰规律研究 [D]. 成都: 西南石油大学, 2014 | |
| 13 | Qin R Z, Du Y X, Peng G Z, et al. High voltage direct current interference on buried pipelines: Case study and mitigation design [A], Corrosion 2017 [C]. New Orleans, Louisiana, USA: NACE International, 2017: 9049 |
| 14 | Qian S, Cheng Y F. Accelerated corrosion of pipeline steel and reduced cathodic protection effectiveness under direct current interference [J]. Constr. Build. Mater., 2017, 148: 675 |
| 15 | Yang C, Zhang C B, Li Z L, et al. Effects of direct current interference on corrosion behavior of X65 steel [J]. Corros. Prot., 2016, 37: 873 |
| 杨 超, 张成斌, 李自力 等. 直流杂散电流对X65钢腐蚀行为的影响 [J]. 腐蚀与防护, 2016, 37: 873 | |
| 16 | Dai N W, Chen Q M, Zhang J X, et al. The corrosion behavior of steel exposed to a DC electric field in the simulated wet-dry cyclic environment [J]. Mater. Chem. Phys., 2017, 192: 190 |
| 17 | Qin R Z, Du Y X, Lu M X, et al. Study on interference parameters variation regularity and corrosion behavior of X80 steel in Guangdong soil under high voltage direct current interference [J]. Acta Metall. Sin., 2017, 54: 886 |
| 秦润之, 杜艳霞, 路民旭 等. 高压直流干扰下X80钢在广东土壤中的干扰参数变化规律及腐蚀行为研究 [J]. 金属学报, 2017, 54: 886 | |
| 18 | Zhang H, Du Y X, Qin R Z, et al. Study on corrosion behavior of X80 steel in Guangdong soil with different water contents under HVDC interference [J]. Electrochemistry, 2020, 88: 1 |
| 19 | Cao Z Y. Study for calcareous deposits under initial cathodic protection in simulated deep ocean environment [D]. Qingdao: Ocean University of China, 2010 |
| 曹振宇. 模拟深海环境阴极保护初期钙镁沉积层的研究 [D]. 青岛: 中国海洋大学, 2010 | |
| 20 | Fu C F, Yang B K, Yang D N, et al. Stray current corrosion of Q235 steel in Hainan soil [J]. Corros. Prot., 2017, 38: 756 |
| 符传福, 杨丙坤, 杨大宁 等. 海南土壤中Q235钢的杂散电流腐蚀 [J]. 腐蚀与防护, 2017, 38: 756 | |
| 21 | Bertolini L, Carsana M, Pedeferri P. Corrosion behaviour of steel in concrete in the presence of stray current [J]. Corros. Sci., 2007, 49: 1056 |
| 22 | Refait P, Abdelmoula M, Génin J M R. Mechanisms of formation and structure of green rust one in aqueous corrosion of iron in the presence of chloride ions [J]. Corros. Sci., 1998, 40: 1547 |
| 23 | Refait P, Génin J M R. The oxidation of ferrous hydroxide in chloride-containing aqueous media and Pourbaix diagrams of green rust one [J]. Corros. Sci., 1993, 34: 797 |
| 24 | Hu S X. Handbook of Cathodic Protection Engineering [M]. Beijing: Chemical Industry Press, 1999: 34 |
| 胡士信. 阴极保护工程手册 [M]. 北京: 化学工业出版社, 1999: 34 | |
| 25 | Deslouis C, Festy D, Gil O, et al. Characterization of calcareous deposits in artificial sea water by impedance techniques—I. Deposit of CaCO3 without Mg(OH)2 [J]. Electrochim. Acta, 1998, 43: 1891 |
| 26 | Li C J, Du M. The growth mechanism of calcareous deposits under various hydrostatic pressures during the cathodic protection of carbon steel in seawater [J]. RSC Adv., 2017, 7: 28819 |
| 27 | Alcántara J, Chico B, Simancas J, et al. An attempt to classify the morphologies presented by different rust phases formed during the exposure of carbon steel to marine atmospheres [J]. Mater. Charact., 2016, 118: 65 |
| 28 | Xu W, Daub K, Zhang X, et al. Oxide formation and conversion on carbon steel in mildly basic solutions [J]. Electrochim. Acta, 2009, 54: 5727 |
| 29 | Frangini S, De Cristofaro N. Analysis of the galvanostatic polarization method for determining reliable pitting potentials on stainless steels in crevice-free conditions [J]. Corros. Sci., 2003, 45: 2769 |
| 30 | Song Y R, Jiang G M, Chen Y, et al. Effects of chloride ions on corrosion of ductile iron and carbon steel in soil environments [J]. Sci. Rep., 2017, 7: 6865 |
| 31 | Du Y X, Wierzbinski E, Waldeck D H. Research on the difference of characteristics at steel/electrolyte interface under cathodic protection and in high-pH alkaline solution [J]. J. Electroanal. Chem., 2022, 925: 116878 |
| 32 | Qin R Z, Du Y X, Xu Z C, et al. Influence of Cl- ions on anodic polarization behaviour of API X80 steel in high potential/current density conditions in Na2SO4 solution [J]. RSC Adv., 2019, 9: 7698 |
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