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研究篇

某油田90℃井下环境中N80Q钢的CO2腐蚀行为

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  • 1达力普石油专用管有限公司技术中心; 2上海大学省部共建高品质特殊钢冶金与制备国家重点实验室
田青超(1970-),博士,教授级高级工程师,主要研究方向为特殊钢及先进功能材料研究,E-mail: tctian@shu.edu.cn

收稿日期: 2023-12-14

  修回日期: 2024-04-19

  录用日期: 2024-04-20

  网络出版日期: 2024-12-22

基金资助

上海市科学技术委员会资助课题(19DZ2270200)

CO2 Corrosion Behavior of N80Q Steels under 90 ℃Underground Environment of Certain Oil Field

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  • (1.Technology Center,Dalipu Petroleum Special Pipe Co.,Ltd.,Cangzhou 061113,China;2.State Key Laboratory of Advanced Special Steel,Shanghai University,Shanghai 200444,China)
TIAN Qingchao (1970-),Ph.D.,Professor,Research Focus: Special Steel and Advanced Functional Materials,E-mail:tctian@shu.edu.cn

Received date: 2023-12-14

  Revised date: 2024-04-19

  Accepted date: 2024-04-20

  Online published: 2024-12-22

Supported by

Funding Project of the Science and Technology Commission of Shanghai Municipality (19DZ2270200)

摘要

为了给某油田针对实际地下腐蚀环境的选材提供参考建议,使用高压釜模拟了油田地下腐蚀环境90℃、1.0 m/s 下5Mn2、1CrRE 和2Cr 钢生产的N80Q 钢管的CO2腐蚀行为,使用扫描电子显微镜以及配套的能谱仪、X 射线衍射仪对3 种钢的腐蚀产物膜进行表征。结果表明:在90 ℃下这些钢种主要呈均匀腐蚀特征,平均腐蚀速率差异不大。腐蚀产物膜均呈双层结构,且较为致密,主要由FeCO3和少量FeOOH 构成。研究提出,Fe3C 在腐蚀产物膜中作为阳极可以生成FeCO3和FeOOH,从而导致90 ℃下腐蚀速率显著下降。

本文引用格式

王奎, 张玉玲, 冯莹, 田青超 . 某油田90℃井下环境中N80Q钢的CO2腐蚀行为[J]. 材料保护, 2024 , 57(11) : 39 -44 . DOI: 10.16577/j.issn.1001-1560.2024.0247

Abstract

In order to provide reference suggestions for selection of materials for the actual underground corrosion environment of a certain oil field,a high-pressure autoclave was used to simulate the CO2 corrosion behavior of N80Q steel pipes prepared by the 25Mn2,1CrRE and 2Cr steel under 90 ℃and 1.0 m/s in the underground corrosive environment of the oil field.Additionally,scanning electron microscopy,energy dispersive spectroscopy and X-ray diffraction were utilized to characterize corrosion product films of three types of steel.Results showed that the three steels mainly exhibited uniform corrosion characteristics at 90 ℃,and the difference in average corrosion rates was not significant.Meanwhile,the corrosion product films consisted of a relatively dense double-layered structure,and their composition were main FeCO3 and a small amount of FeOOH.The research suggested that Fe3C as an anode in the corrosion film could generate FeCO3 and FeOOH,which led to a significant decrease in corrosion rate at 90 ℃.
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