[1]赵国仙,高明忍.2830/140V油套管钢的电偶腐蚀行为[J].焊管,2020,43(10):8-16.[doi:10.19291/j.cnki.1001-3938.2020.10.002]
 ZHAO Guoxian,GAO Mingren.Galvanic Corrosion Behavior of 2830/140V Oil Casing Steel[J].,2020,43(10):8-16.[doi:10.19291/j.cnki.1001-3938.2020.10.002]
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2830/140V油套管钢的电偶腐蚀行为()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
43
期数:
2020年第10期
页码:
8-16
栏目:
试验与研究
出版日期:
2020-10-28

文章信息/Info

Title:
Galvanic Corrosion Behavior of 2830/140V Oil Casing Steel
文章编号:
10.19291/j.cnki.1001-3938.2020.10.002
作者:
赵国仙高明忍
西安石油大学 材料科学与工程学院,西安 710065
Author(s):
ZHAO Guoxian GAO Mingren
School of Materials Science and Engineering, Xi’an Shiyou University, Xi’an 710065, China
关键词:
电偶腐蚀镍铬合金钢碳钢地层水环境
Keywords:
galvanic corrosion Ni-Cr alloy steel carbon steel formation water environment
分类号:
TG174.36
DOI:
10.19291/j.cnki.1001-3938.2020.10.002
文献标志码:
A
摘要:
为研究140V碳钢和2830镍铬合金钢之间的电偶腐蚀行为,通过模拟150 ℃、H2S分压1.5 MPa、CO2分压4.5 MPa、Cl-浓度90 000 mg/L的地层水井下环境,采用浸泡腐蚀模拟试验,并利用 XRD 结合 SEM、EDS 观察分析腐蚀产物膜特征,研究了2830镍铬合金钢与140V碳钢在模拟地层水环境中偶接前后的电偶腐蚀行为。结果表明:在模拟地层水腐蚀环境下,2830镍铬合金钢与140V碳钢偶接后,发生了明显的电偶腐蚀,其中碳钢140V作为偶对体系的阳极,平均腐蚀速率明显增长,而镍铬合金钢2830作为阴极,平均腐蚀速率有所减缓。XRD检测结果表明,2830钢试样表面生成主要是内部基体的Fe-Ni固溶体、Cr-Ni固溶体、Fe及Ni的腐蚀产物膜,140V钢试样表面则主要是FeS、FeS2、FeCO3及Fe3O4的腐蚀产物膜。电偶腐蚀评价研究表明镍铬合金钢+碳钢组合电偶腐蚀较严重,在油套管应用中应避免直接接触使用。
Abstract:
In order to study the galvanic corrosion between140V carbon steel and 2830 Ni-Cr alloy steel , by simulating formation water subsurface environment with 150 ℃, H2S partial pressure 1.5 MPa, CO2 partial pressure 4.5 MPa and Cl- concentration 90 000 mg/L, the immersion corrosion simulation test was carried out, and the characteristics of the corrosion products were observed and analyzed by XRD, SEM and EDS, the galvanic corrosion behavior of 2830 Ni-Cr alloy steel and 140V carbon steel before and after coupling in simulated formation water environment was studied. The results show that under the simulated formation water corrosion environment, the galvanic corrosion of 2830 Ni-Cr alloy steel and 140V Carbon steel occurs obviously, in which the average corrosion rate of carbon steel 140V as the anode of the coupling system increases obviously, while that of 2830 Ni-Cr alloy as the cathode decreases somewhat. XRD test results show that Fe-Ni solid solution, Cr-Ni solid solution, the corrosion product film with internal matrix are mainly generated on the surface of 2830 sample, while the corrosion product film of FeS,  FeS2, FeCO3 and Fe3O4 are mainly used on the surface of 140V sample. The galvanic corrosion evaluation shows that the galvanic corrosion of Ni-Cr alloy steel and carbon steel is serious, so direct contact should be avoided in oil casing application.

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备注/Memo

备注/Memo:
收稿日期:2020-06-23
作者简介:赵国仙(1968— ),女,教授,研究方向为石油管的腐蚀与防护。
更新日期/Last Update: 2020-12-07