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

WANG Kui, ZHANG Yuling, FENG Ying, TIAN Qingchao

doi:10.16577/j.issn.1001-1560.2024.0247

Materials Protection >

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

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

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

Expand

(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)

Fold

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

Cite this article

WANG Kui, ZHANG Yuling, FENG Ying, TIAN Qingchao . CO₂ Corrosion Behavior of N80Q Steels under 90 ℃Underground Environment of Certain Oil Field[J]. Materials Protection, 2024 , 57(11) : 39 -44 . DOI: 10.16577/j.issn.1001-1560.2024.0247

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article