Corrosion Behavior of 80SS Steel in Simulated Gas Wellbore Environment
摘 要
通过高温、高压腐蚀模拟试验和腐蚀理论分析,研究了某气田气井井筒材料80SS钢在不同H2S分压(0.005~0.1 MPa)、CO2分压(0.1~1.0 MPa)及温度(30~90℃)下的腐蚀规律。结果表明:在CO2分压为1.5 MPa,温度为80℃条件下,随着H2S分压的增大,80SS钢的腐蚀速率由1.69 mm/a降低至0.12 mm/a,当H2S分压为0.1 MPa时,试样表面出现细小的点蚀坑;当H2S分压为0.01 MPa,温度80℃时,随着CO2分压的增大,80SS钢的腐蚀速率增大,发生极严重腐蚀;当温度由30℃升高至90℃,80SS钢的腐蚀速率由0.24 mm/a逐渐增大至0.98 mm/a,腐蚀产物晶粒变大,试样表面腐蚀产物覆盖不完全,逐渐出现局部腐蚀风险。
Abstract
The corrosion laws of wellbore material 80SS steel in a gas field under different conditions of H2S partial pressures (0.005-0.1 MPa), CO2 partial pressures (0.1-1.0 MPa) and temperatures (30-90 ℃) were studied by high temperature and high pressure corrosion simulation experiment and corrosion theory analysis. The results show that under the condition of CO2 partial pressure of 1.5 MPa and temperature of 80 ℃, with the increase of H2S partial pressure, the corrosion rate of 80SS steel decreased from 1.69 mm/a to 0.12 mm/a. When the partial pressure of H2S was 0.1 MPa, there were tiny pits on the surface of the sample. When the partial pressure of CO2 increased, the corrosion rate of 80SS steel increased under the condition of H2S partial pressure of 0.01 MPa and temperature of 80 ℃, and extremely serious corrosion occurred. When the temperature rose from 30 ℃ to 90 ℃, the corrosion rate of 80SS steel increased from 0.24 mm/a to 0.98 mm/a, the grain size of corrosion products increased, and corrosion products could not cover the surface of sample completely, and the risk of localized corrosion gradually appeared.
中图分类号 TG172 DOI 10.11973/fsyfh-202006008
所属栏目 试验研究
基金项目
收稿日期 2018/8/24
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: WANG Zhenjia,NIU Bin,XU Dongxiao,XU Yong,MA Lin,WEN Ninghua,LI Dapeng. Corrosion Behavior of 80SS Steel in Simulated Gas Wellbore Environment[J]. Corrosion & Protection, 2020, 41(6): 39
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】黄本生,卢杰,邓龙,等. 某油田N80钢油管腐蚀失效的原因[J]. 机械工程材料,2016,40(1):93-97.
【2】刘绘新,苏东平. 川东气田油管腐蚀现象的基本特征[J]. 天然气工业,2000,20(5):77-79.
【3】阎姚小,冯玉军. 国内外气田开发中管内CO2腐蚀研究进展[J]. 油气储运,1996,15(2):97-99.
【4】刘会,朱世东,赵国仙,等. 动态和静态下CO2分压对P110钢腐蚀行为的影响[J]. 腐蚀与防护,2009,30(8):551-554.
【5】杨建炜,张雷,路民旭. 油气田CO2/H2S共存条件下的腐蚀研究进展与选材原则[J]. 腐蚀科学与防护技术,2009,21(4):401-405.
【2】刘绘新,苏东平. 川东气田油管腐蚀现象的基本特征[J]. 天然气工业,2000,20(5):77-79.
【3】阎姚小,冯玉军. 国内外气田开发中管内CO2腐蚀研究进展[J]. 油气储运,1996,15(2):97-99.
【4】刘会,朱世东,赵国仙,等. 动态和静态下CO2分压对P110钢腐蚀行为的影响[J]. 腐蚀与防护,2009,30(8):551-554.
【5】杨建炜,张雷,路民旭. 油气田CO2/H2S共存条件下的腐蚀研究进展与选材原则[J]. 腐蚀科学与防护技术,2009,21(4):401-405.
相关信息