[1]赵国仙,刘冉冉,丁浪勇,等.5Cr套管钢在不同CO2分压下高温高压腐蚀特性研究[J].焊管,2023,46(4):8-15.[doi:10.19291/j.cnki.1001-3938.2023.04.002]
　ZHAO Guoxian,LIU Ranran,DING Langyong,et al.Study on Corrosion Characteristics of 5Cr Casing Steel under High Temperature and High Pressure in Different CO2 Partial Pressure[J].,2023,46(4):8-15.[doi:10.19291/j.cnki.1001-3938.2023.04.002]
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5Cr套管钢在不同CO2分压下高温高压腐蚀特性研究()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
46
期数:
2023年第4期
页码:
8-15
栏目:
试验与研究
出版日期:
2023-04-28

文章信息/Info

Title:
Study on Corrosion Characteristics of 5Cr Casing Steel under High Temperature and High Pressure in Different CO2 Partial Pressure
文章编号:
10.19291/j.cnki.1001-3938.2023.04.002
作者:
赵国仙; 刘冉冉; 丁浪勇; 宋洋
1. 西安石油大学 材料科学与工程学院，西安 710065； 2. 西安摩尔石油工程实验室股份有限公司，西安 710065
Author(s):
ZHAO Guoxian;  LIU Ranran;  DING Langyong;  SONG Yang
1. School of Material Science and Technology, Xi’an Shiyou University, Xi’an 710065, China; 2. Xi’an Maurer Petroleum Engineering Laboratory Co., Ltd., Xi’an 710065, China
关键词:
5Cr套管钢; CO2腐蚀; 高温高压; 电化学; 腐蚀产物膜
Keywords:
5Cr casing steel;  CO2 corrosion;  high temperature and high pressure;  electrochemical;  corrosion product film
分类号:
TG174.44
DOI:
10.19291/j.cnki.1001-3938.2023.04.002
文献标志码:
A
摘要:
为了研究5Cr套管钢在不同CO2分压下的腐蚀特性，进行了5Cr套管钢高温高压腐蚀失重和高温高压电化学试验，并采用XRD、SEM和EDS等手段对其腐蚀产物进行微观分析。结果表明，在高温高压腐蚀环境下随着CO2分压从低到高，其表面点蚀坑的深度和直径均无明显变化，而点蚀速率则出现逐渐减小的趋势；其腐蚀产物膜由Cr（OH）3、FeCO3和CaCO3共同组成，且随着CO2分压的升高Cr的富集量逐渐增加；在电化学测试中，随着CO2分压的不断升高，5Cr套管钢表现出半钝化特征，产物膜逐渐增厚且致密，且极化电阻逐渐增大，阳极反应受到抑制，电化学反应阻力增大，其抗局部腐蚀能力不断提高。
Abstract:
In order to study the corrosion characteristics of 5Cr casing steel under different CO2 partial pressures, high temperature and high pressure corrosion weight loss and high temperature and high pressure electrochemical tests were conducted. The microscopic analysis of the corrosion products by means of XRD, SEM, and EDS showed that under high temperature and high pressure corrosion environments, the depth and diameter of the surface pitting pits did not significantly change with the CO2 partial pressure increasing from low to high, while the pitting rate gradually decreased. The corrosion product film consists of Cr (OH)3, FeCO3 and CaCO3, the concentration of Cr gradually increases with the rising of CO2 partial pressure. Meanwhile, with the continuous increase of CO2 partial pressure in electrochemical testing, 5Cr casing exhibits a semi?assivation feature, with the product film gradually thickening and densifying, and the polarization resistance gradually increasing. Its anode reaction is inhibited, the electrochemical reaction resistance increases, and its resistance to local corrosion continues to improve.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2023-02-03基金项目： 陕西省自然科学基础研究计划“基于产物膜发育机制的高温高压Fe-O2-CO2-H2O体系腐蚀驱动及扰动研究”（项目编号2022JM-269）。
作者简介： 赵国仙（1968—），女，山西运城人，三级教授，主要从事油气田腐蚀与防护研究。
通讯作者： 刘冉冉（1997—），女，新疆克拉玛依人，硕士研究生，主要研究方向为金属的腐蚀与防护。
更新日期/Last Update: 2023-04-26