110SS油管钢在高酸性气藏环境下的腐蚀行为

陈治宇, 黄本生, 唐景黎, 左寒阳

doi:10.16577/j.issn.1001-1560.2024.0221

材料保护 >

2024 , Vol. 57 >Issue 10: 27 - 34

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0221

研究篇

110SS油管钢在高酸性气藏环境下的腐蚀行为

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¹西南石油大学新能源与材料学院； ²四川省玄武岩纤维复合材料及开发应用工程技术研究中心； ³材料腐蚀与防护四川省重点实验室

黄本生(1969-)，教授，博士，主要从事材料腐蚀、材料连接、表面工程等研究，E-mail: hbslxp＠163.com

收稿日期: 2024-04-15

修回日期: 2024-05-10

录用日期: 2024-05-15

网络出版日期: 2024-12-20

基金资助

国家自然科学基金(52376076)；材料腐蚀与防护四川省重点实验室开放基金(2023CL13)资助

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Corrosion Behavior of 110SS Tubing Steel in Highly Acidic Gas Reservoir Environment

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(1.School of New Energy and Materials， Southwest Petroleum University， Chengdu 610500， China；2.Sichuan Engineering Technology Research Center of Basalt Fiber Composites Development and Application， Chengdu 610500， China；3.Material Corrosion and Protection Key Laboratory of Sichuan Province， Zigong 643000， China)

HUANG Bensheng(1969-)， Professor， Ph.D.， Research Focus: Material Corrosion， Material Bonding， Surface Engineering， E-mail: hbslxp＠163.com

Received date: 2024-04-15

Revised date: 2024-05-10

Accepted date: 2024-05-15

Online published: 2024-12-20

Supported by

National Natural Science Foundation of China (52376076)；Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province (2023CL13)

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摘要

110SS 钢因其优异的耐腐蚀性能和强度，在酸性环境的气藏油管材料中被广泛应用。为深入理解其在高酸性气藏环境中的腐蚀行为，将110SS 油管挂片放置于高温高压反应釜中进行CO2/ H2S 环境模拟腐蚀实验，并利用扫描电子显微镜(SEM)、X 射线衍射仪(XRD)、能谱仪(EDS)、电化学测量等手段对其腐蚀产物形貌、腐蚀速率、物相、元素含量及电化学行为进行研究。结果表明，在72 ～168 h 腐蚀时间内，110SS 油管的腐蚀速率呈幂函数变化规律，并随着腐蚀时间的延长而降低；72 h 时试样表面出现黄褐色的点状腐蚀产物，120 h 时黄褐色腐蚀产物出现大面积脱落，以新出现的灰色腐蚀产物为主，168 h 时呈现出分布均匀的青色腐蚀产物；110SS 钢腐蚀产物主要有S、FeS1-x、Fe1-xS、FeS、Fe2O3、Fe3O4、FeCl3、FeCO3等；此外，自腐蚀电流密度随着腐蚀时间的延长而增加。研究结果有助于更好地了解110SS 油管钢在高酸性气藏环境中的腐蚀行为。

关键词： 110SS 油管钢; CO₂/H₂S; 高酸性; 电化学

本文引用格式

陈治宇, 黄本生, 唐景黎, 左寒阳 . 110SS油管钢在高酸性气藏环境下的腐蚀行为[J]. 材料保护, 2024 , 57(10) : 27 -34 . DOI: 10.16577/j.issn.1001-1560.2024.0221

Abstract

110SS steel is widely used in gas reservoir tubing materials in acidic environments owing to its excellent corrosion resistance and strength.In order to deeply understand its corrosion behavior in high acid gas reservoir environment， the 110 SS tubing coupon was placed in a high temperature and high pressure reactor for carrying out CO2/H2S environment simulation corrosion experiments.The morphology， corrosion rate， product phase，element contents and electrochemical behavior of the corrosion products were studied by means of scanning electron microscope (SEM)， X-ray diffractometer (XRD)， energy dispersive spectrometer (EDS) and electrochemical measurement.Results showed that during the corrosion time of 72～168 h， the corrosion rate of 110SS tubing followed a power function variation pattern and decreased with the prolongation of corrosion time.At 72 h， yellow brown point corrosion products appeared on the surface of the sample.At 120 h， large areas of yellow brown corrosion products peeled off， mainly newly appearing gray corrosion products.At 168 h， uniformly distributed blue corrosion products appeared.Moreover， the corrosion products of 110SS steel mainly include S， FeS1-x， Fe1-xS， FeS， Fe2O3， Fe3O4， FeCl3， FeCO3，etc.， and the self-corrosion current density increased with the prolongation of corrosion time.In general， the results are helpful to better understand the corrosion behavior of 110SS tubing in highly acidic gas reservoir environment.

Key words： 110SS tubing steel; CO₂/H₂S; high acidity; electrochemical

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