温度对CO<sub>2</sub>饱和页岩气压裂液环境中N80和TP125V钢腐蚀行为影响研究

doi:10.11902/1005.4537.2022.076

中国腐蚀与防护学报

2023, Vol. 43

Issue (2): 251-260 CSTR: 32134.14.1005.4537.2022.076 DOI: 10.11902/1005.4537.2022.076

中国腐蚀与防护学报编委、青年编委专栏

本期目录 | 过刊浏览

温度对CO₂饱和页岩气压裂液环境中N80和TP125V钢腐蚀行为影响研究

黄家和¹, 袁曦², 陈文², 闫文静², 金正宇¹, 柳海宪¹, 刘宏芳³, 刘宏伟¹(

)

^1.中山大学化学工程与技术学院珠海 519082
^2.中国石油西南油气田分公司天然气研究院成都 610299
^3.华中科技大学化学与化学工程学院武汉 430074

Effect of Temperature on Corrosion Behavior of Pipeline Steels N80 and TP125V in Artificial CO₂-saturated Fracturing Fluid of Shale Gas

HUANG Jiahe¹, YUAN Xi², CHEN Wen², YAN Wenjing², JIN Zhengyu¹, LIU Haixian¹, LIU Hongfang³, LIU Hongwei¹(

)

^1.School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
^2.Research Institute of Natural Gas Technology, Southwest Oil & Gasfield Company, China National Petroleum Corporation, Chengdu 610299, China
^3.School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

全文: PDF(29648 KB) HTML

摘要:

采用失重法、扫描电镜、X射线衍射仪、三维超景深显微镜结合电化学测量，着重研究了N80和TP125V钢在页岩气环境中60~120 ℃范围内的腐蚀速率的变化规律。结果表明，N80和TP125V钢腐蚀速率随温度的增加先增加后减小，100 ℃时达到最高值，分别为 (0.169±0.014) 和 (0.198±0.007) mm/a；局部腐蚀速率也达到最大值，分别为1.13和2.47 mm/a，点蚀坑密度分别是2.0×10³和2.6×10³ pits/cm²。在60和120 ℃时，N80钢的腐蚀速率要高于TP125V钢的；而在90、100和110 ℃时，TP125V钢的腐蚀速率要高于N80钢的。表面分析结果表明，温度同时也会显著影响腐蚀产物膜的结构和组成。

关键词 ：腐蚀, 页岩气, N80钢, TP125V钢, 温度, 局部腐蚀

Abstract：

Temperature is one of the key factors influencing the corrosion of oil pipeline steel in the shale gas environment. This work studied the effect of temperature on the corrosion behavior of pipeline steels N80 and TP125V in an artificial CO₂-saturated fracturing fluid of shale gas by means of mass loss measurement, electrochemical measurement, scanning electron microscopy, X-ray diffractometer and 3D microscope. Results indicate that among others, the corrosion rates of steels N80 and TP125V reached the highest at 100 ℃ with values of (0.169±0.014) and (0.198±0.007) mm/a, respectively. Correspondingly, the highest localized corrosion rates were 1.13 and 2.47 mm/a, while the densities of corrosion pits were 2.0×10³ and 2.6×10³ pits/cm², respectively. In conclusion, the corrosion rates of steels N80 and TP125V increased firstly with the increasing temperature, further reached the maximum at 100 ℃, and then decreased gradually. The corrosion rates of N80 steel were higher than those of TP125V steel at 60 and 120 ℃ respectively, but the corrosion rates of the two steels are reversed at 90, 100, and 100 ℃. The temperature could also influence the structure and components of the formed corrosion products according to the surface analysis results.

Key words： corrosion shale gas N80 steel TP125V steel temperature localized corrosion

收稿日期: 2022-03-16 32134.14.1005.4537.2022.076

ZTFLH:

TG174

基金资助:国家自然科学基金(51901253);广东省基础与应用基础研究基金(2019A1515011135);中央高校基本科研业务费专项(19lgzd18);材料化学与服役失效湖北省重点实验开放课题(2020MCF02)

作者简介: 黄家和，男，1997年生，硕士生

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引用本文:

黄家和, 袁曦, 陈文, 闫文静, 金正宇, 柳海宪, 刘宏芳, 刘宏伟. 温度对CO₂饱和页岩气压裂液环境中N80和TP125V钢腐蚀行为影响研究[J]. 中国腐蚀与防护学报, 2023, 43(2): 251-260.
Jiahe HUANG, Xi YUAN, Wen CHEN, Wenjing YAN, Zhengyu JIN, Haixian LIU, Hongfang LIU, Hongwei LIU. Effect of Temperature on Corrosion Behavior of Pipeline Steels N80 and TP125V in Artificial CO₂-saturated Fracturing Fluid of Shale Gas. Journal of Chinese Society for Corrosion and protection, 2023, 43(2): 251-260.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.076 或 https://www.jcscp.org/CN/Y2023/V43/I2/251

图1 N80钢和TP125V钢在不同温度条件下饱和CO2腐蚀介质中浸泡14 d后由失重计算得到的腐蚀速率

图2 在不同温度下饱和CO2腐蚀测试介质中浸泡14 d后N80钢表面腐蚀产物SEM形貌和EDS谱

表1 不同温度条件下浸泡14 d后N80钢表面腐蚀产物的EDS能谱分析结果 (mass fraction / %)

图3 饱和CO2腐蚀测试介质中测试14 d后不同温度条件下TP125V钢表面腐蚀产物SEM形貌和EDS谱

表2 在不同温度下浸泡14 d后TP125V钢表面腐蚀产物的EDS能谱分析结果 (mass fraction / %)

图4 在不同温度下饱和CO2腐蚀测试介质中浸泡14 d后N80钢和TP125V钢表面腐蚀产物XRD谱

图5 N80钢在不同温度下饱和CO2腐蚀测试介质中浸泡14 d且去除腐蚀产物后的表面形貌

图6 TP125V钢在不同温度下饱和CO2腐蚀测试介质中浸泡14 d且去除腐蚀产物后的表面形貌

图7 由去除腐蚀产物后3D表面形貌图统计得到N80钢和TP125V钢局部腐蚀速率和点蚀坑密度

图8 TP125V钢在不同温度下饱和CO2腐蚀测试介质中浸泡14 d后的极化曲线

表3 TP125V钢极化曲线的拟合结果

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