20号碳钢在模拟NaCl三元复合驱注入段溶液中的腐蚀行为  

Corrosion Behavior of 20#Carbon Steel in Simulated NaCl Three-Element Complex Drive Injection Section Solution

作　　者：于鑫 牛瑞霞[1] 王超[2] 钱慧娟[2] 张丽[2] 张和悦 高清河[2] YU Xin;NIU Ruixia;WANG Chao;QIAN Huijuan;ZHANG Li;ZHANG Heyue;GAO Qinghe(Chemical Engineering College,Northeast Petroleum University,Daqing 163712,China;Heilongjiang Key Laboratory of Applied Chemistry and Technology,Daqing Normal University,Daqing 163712,China)

机构地区：[1]东北石油大学化学化工学院,大庆163712 [2]大庆师范学院黑龙江省油田应用化学与技术重点实验室,大庆163712

出　　处：《腐蚀与防护》2023年第6期6-10,33,共6页Corrosion & Protection

基　　金：大庆市科技计划项目(zd-2020-19)。

摘　　要：通过实验室模拟现场NaCl三元复合驱注入段溶液体系,采用电化学阻抗谱、动电位极化曲线的方法,结合扫描电镜表面分析技术和X射线粉末衍射技术,研究了20号碳钢在注入段溶液中的腐蚀行为。结果表明:注入段溶液中含有大量硫酸盐还原菌(SRB),少量的铁细菌(IB)和腐生菌(TGB);碱、聚合物和表面活性剂的协同作用使碳钢的整体腐蚀速率较小;由于Cl-作用,在浸泡初期碳钢的腐蚀速率达到最大,随着腐蚀产物以及生物膜的形成,碳钢的腐蚀速率减小,在浸泡后期,由于生物膜厚度不均匀以及FeS形成,碳钢腐蚀加速。The system of three-element complex drive injection section solution simulated in laboratory,electrochemical impedance spectroscopy,potentiodynamic polarization curve,scanning electron microscopy and X-ray powder diffraction were used to study the corrosion behavior of 20#carbon steel in the injection solution.The results showed that there were a large amount of sulfate-reducing bacteria(SRB),a small amount of iron bacteria(IB)and total general bacteria(TGB)in the injection solution.The corrosion rate of carbon steel reached the highest at the initial stage of immersion due to Cl-action,and then decreased with the formation of corrosion products and biological film.The corrosion rate of carbon steel was accelerated due to the uneven thickness of biological film and the formation of FeS at the later stage of immersion.

关 键 词：20号钢 NaCl三元复合驱 注入段溶液 微生物 

分 类 号：TG172.9[金属学及工艺—金属表面处理]