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中国腐蚀与防护学报  2014, Vol. 34 Issue (1): 46-52    DOI: 10.11902/1005.4537.2013.038
  研究论文 本期目录 | 过刊浏览 |
H2S分压对13Cr不锈钢在CO2注气井环空环境中应力腐蚀行为的影响
王 峰1,2 韦春艳3 黄天杰1,4 崔中雨5 李晓刚5
1. 国家能源CO2驱油与埋存研发 (实验) 中心 松原 138000;
2. 东北石油大学 提高油气采收率教育部重点实验室 大庆 163318;
3. 吉林油田公司扶余采油厂 松原 138003;
4. 吉林油田公司采油工艺研究院 松原 138003;
5. 北京科技大学腐蚀与防护中心 北京 100083
Effect of H2S Partial Pressure on Stress Corrosion Cracking Behavior of 13Cr Stainless Steel in Annulus Environment Around CO2 Injection Well
WANG Feng1,2, WEI Chunyan3, HUANG Tianjie1,4, CUI Zhongyu5, LI Xiaogang5
1. National Energy CCS-EOR R&D (Experimental) Center, Songyuan 138000, China;
2. Key Laboratory for Enhancing Oil Recovery of the Ministry of Education, Northeast Petroleum University, Daqing 163318, China;
3. Fuyu Oil Production Plant, Jilin Oil Field Company, Songyuan 138003, China;
4. Oil Production Technology Institute, Jilin Oil Field Company, Songyuan 138003, China;
5. Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
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摘要: 利用高压下的电化学实验及U型弯浸泡实验结合微观分析手段,研究了13Cr不锈钢在不同H2S分压下CO2注气井环空环境模拟液中的电化学特征及应力腐蚀规律。结果表明:油套管钢的刺漏现象以及环境中硫酸盐还原菌的存在使得环空环境成为复杂的高压H2S-CO2-Cl-环境,13Cr不锈钢在该种环境下具有明显的应力腐蚀敏感性。随着H2S分压的升高,13Cr不锈钢击破电位下降,应力腐蚀敏感性增强,这主要因为H2S分压的增大对不锈钢表面膜 (钝化膜及腐蚀产物膜) 的破坏作用加强。当H2S分压达到0.20 MPa时,13Cr不锈钢发生明显的应力腐蚀,断口表现为由沿晶应力腐蚀裂纹 (IGSCC) 和穿晶应力腐蚀裂纹 (TGSCC) 组成的混合断口,应力腐蚀受阳极溶解和氢致开裂共同控制。
关键词 13Cr不锈钢H2S/CO2应力腐蚀H2S分压    
Abstract:Electrochemical characteristics and stress corrosion cracking (SCC) behavior of 13Cr stainless steel were investigated by electrochemical measurements, U-bent specimen immersion test and surface analysis technique in an artificial solution with an autoclave, which aimed to simulate the annulus environment around CO2 injection well. The results showed that annulus solution around injection well was a complicated H2S-CO2-Cl- environment which generated the SCC of 13Cr stainless steel. The pitting breakthrough potential and SCC resistance of 13Cr stainless steel decreased obviously with increasing H2S partial pressure, which is associated with the deterioration of surface film (passive film and corrosion products scales) on the steel. When the H2S partial pressure exceeded 0.20 MPa (including 0.20), SCC occurred on 13Cr steel. Typical transgranular and intergranular fracture morphologies were observed, which indicated that the SCC process was mixed-controlled by both anodic dissolution and hydrogen-induced cracking.
Key words13Cr stainless steel    H2S/CO2    stress corrosion cracking    H2S partial pressure
收稿日期: 2013-04-24     
ZTFLH:  TG172  
基金资助:国家自然科学基金重点项目 (51131001) 和松辽盆地含CO2气藏开发及利用示范工程项目 (2012ZX05054)资助
通讯作者: 王峰,E-mail:wangfeng1@petrochina.com.cn   
作者简介: 王峰,男,1973年生,高级工程师,研究方向为采气工艺、CO2驱油技术

引用本文:

王峰, 韦春艳, 黄天杰, 崔中雨, 李晓刚. H2S分压对13Cr不锈钢在CO2注气井环空环境中应力腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2014, 34(1): 46-52.
. Effect of H2S Partial Pressure on Stress Corrosion Cracking Behavior of 13Cr Stainless Steel in Annulus Environment Around CO2 Injection Well. Journal of Chinese Society for Corrosion and protection, 2014, 34(1): 46-52.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2013.038      或      https://www.jcscp.org/CN/Y2014/V34/I1/46

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