P110S碳钢在高Cl-高酸性气体分压下的腐蚀行为
Corrosion Behavior of P110S Carbon Steel Under High Cl- High Acid Gas Partial Pressure
摘 要
模拟了西北塔河油田极端苛刻的环境,通过高温高压反应釜模拟试验,失重法、显微组织观察,腐蚀产物物相分析等考察了在高Cl-含酸性气体条件下,温度和CO2分压对P110S碳钢腐蚀行为的影响。结果表明:P110S碳钢的腐蚀速率随着温度的升高先增大后减小再增大,随着CO2分压的升高先增大后减小,腐蚀速率分别在210 ℃和CO2分压8 MPa时达到最大。当温度为150 ℃或CO2分压为8 MPa时,FeCO3晶体开始从溶液中析出,在P110S碳钢表面形成了保护性的产物膜,有效抑制了基体的全面腐蚀,降低了腐蚀速率。此外,溶液中高浓度的Cl-极易导致产物膜发生剥落与破裂,造成严重的点蚀。
酸性气体
P110S碳钢
腐蚀产物膜
腐蚀行为
high temperature
acid gas
P110S carbon steel
corrosion product film
corrosion behavior
Abstract
The extremely harsh environment of Tahe Oilfield in Northwest China was simulated. The effects of temperature and partial pressure of CO2 on the corrosion behavior of P110S carbon steel under the condition of high Cl- containing acid gas were investigated through simulation test in high temperature and high pressure reactor, weight loss method, microstructure observation, phase analysis of corrosion products. The results showed that the corrosion rate of P110S carbon steel first increased, then decreased and then increased with the increase of temperature. With the increase of CO2 partial pressure, the corrosion rate firstly increased and then decreased. The corrosion rate reached the maximum at 210 ℃ and CO2 partial pressure of 8 MPa respectively. When the temperature was 150 ℃ or the partial pressure of CO2 was 8 MPa, FeCO3 crystal began to precipitate from the solution, forming a protective product film on the surface of P110S carbon steel, effectively inhibiting the overall corrosion of the matrix and reducing the corrosion rate. In addition, the high concentration of Cl- in the solution could easily lead to the peeling and cracking of the product film, causing serious pitting corrosion.
中图分类号 TG172 DOI 10.11973/fsyfh-202304004
所属栏目 试验研究
基金项目 国家自然科学基金(21801022)
收稿日期 2022/9/13
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: XIAO Chang,CUI Ruixue,YANG Huan,SU Gaoshen,YU Xiaorong. Corrosion Behavior of P110S Carbon Steel Under High Cl- High Acid Gas Partial Pressure[J]. Corrosion & Protection, 2023, 44(4): 21
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【4】常炜,胡丽华. 温度对X65和3% Cr管线钢CO2腐蚀行为的影响[J]. 腐蚀与防护,2012,33(S1):100-105.
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【10】朱世东,李金灵,杨志刚,等. 温度对J55油管CO2腐蚀行为的影响[J]. 机械工程材料,2014,38(8):6-10.
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【12】LIU Z G,GAO X H,DU L X,et al. Hydrogen assisted cracking and CO2 corrosion behaviors of low-alloy steel with high strength used for armor layer of flexible pipe[J]. Applied Surface Science,2018,440:974-991.
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【17】朱世东,李金灵,马海霞,等. CO2分压对J55油管腐蚀产物膜特征的影响[J]. 西安石油大学学报(自然科学版),2014,29(2):94-98,103,12.
【18】高纯良,刘明亮,李大朋,等. CO2分压对N80油管钢CO2腐蚀行为的影响[J]. 腐蚀与防护,2014,35(10):975-978.
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【21】谷坛,唐德志,王竹,等. 典型离子对碳钢CO2腐蚀的影响[J]. 天然气工业,2019,39(7):106-112.
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【24】张星,赵琳,刘安庆,等. 高温高压CO2驱采出液中N80碳钢局部腐蚀诱发机理[J]. 腐蚀与防护,2021,42(4):36-42.
【25】高秋英,贺三,杨耀辉,等. Q245R钢在高含Cl-塔河模拟油田水中的腐蚀行为研究[J]. 材料保护,2021,54(12):59-63,78.
【26】沈秋燕,刘宏芳,刘烈炜. 沉积硫对FeS及FeCO3膜结构及耐蚀性影响[J]. 中国腐蚀与防护学报,2016,36(1):79-86.
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【30】苏建文,董小平,高腾远,等. SO42-浓度对含Cl-溶液中304不锈钢腐蚀损伤影响[J]. 钢铁钒钛,2022,43(1):165-173.
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