某油田90℃井下环境中N80Q钢的CO2腐蚀行为

王奎, 张玉玲, 冯莹, 田青超

doi:10.16577/j.issn.1001-1560.2024.0247

材料保护 >

2024 , Vol. 57 >Issue 11: 39 - 44

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0247

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)

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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)

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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。

关键词： CO₂腐蚀; 低合金钢; 阳极保护作用

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 ℃.

Key words： CO₂ ; corrosion; low-alloy steel; anodic protection effect

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