L360钢在模拟地层水中的流动腐蚀行为研究
Study on the Flow Corrosion Behavior of L360 Steel in Simulated Formation Water
叶男 1廖俊 2鲜俊 3文烁博 4覃敏 2何国玺2
作者信息
- 1. 西南石油大学石油与天然气工程学院,四川 成都 610500;国家管网集团工程技术创新有限公司,天津 300450
- 2. 西南石油大学石油与天然气工程学院,四川 成都 610500
- 3. 中国石油塔里木油田分公司地面工程部,新疆 库尔勒 841001
- 4. 成都新津墨尔文学校,四川 成都 611432
- 折叠
摘要
为研究含水集输管道真实管流状态下L360钢管壁处的腐蚀行为,利用自制循环流动腐蚀试验装置,通过电化学阻抗和动电位扫描方法考察了L360钢的腐蚀电化学特征,采用扫描电镜和三维光学显微镜对腐蚀微观形貌进行了分析.结果表明:试片的平均腐蚀速率随流速的提高而增大,局部腐蚀速率呈现先减小后增大的趋势;适当提高流速能减缓局部腐蚀速率;环路运行4 h后试样表面开始形成较完整的腐蚀产物膜;当流速达到0.5 m/s时,管壁处腐蚀产物膜开始脱落;对于干净光滑的试样,在腐蚀初期属于极严重腐蚀.
Abstract
In order to study the corrosion behavior of L360 steel at the pipe wall of water-containing gathering and transportation pipelines un-der real flow conditions,a self-made cyclic flow corrosion test device was used.The electrochemical impedance spectroscopy and potentiody-namic scanning methods were used to analyze the corrosion electrochemical characteristics of L360 steel.The scanning electron microscope and three-dimensional optical microscope were used to analyze the corrosion micromorphology.Results showed that the average corrosion rate of the test piece increased with the increase of flow rate,and the local corrosion rate presented a trend of first decreasing and then increasing.Properly increasing the flow rate could slow down the local corrosion rate.After the loop was run for 4 h,a relatively complete corrosion product film be-gan to form on the surface of the sample.When the flow rate reached 0.5 m/s,the corrosion product film on the pipe wall began to detach.For clean and smooth samples,the initial stage of corrosion belonged to extremely severe corrosion.
关键词
流动/管壁/L360钢/腐蚀行为/腐蚀产物膜/局部腐蚀Key words
flow/pipe wall/L360 steel/corrosion behavior/corrosion product film/pitting corrosion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据