管线钢在含硫原油中的腐蚀行为研究  

Study on Corrosion Behavior of Pipeline Steel in Sour Crude Oil

作　　者：田戬 蒲红宇[1] 王京 赵川东 TIAN Jian;PU Hong-yu;WANG Jing;ZHAO Chuan-dong(School of Civil Engineering and Surveying,Southwest Petroleum University,Chengdu 610500,China;Matenials Branch of North China Petroleum Administration Co.,Ltd.,Cangzhou 062552,China;Chongqing Gas Mine of Petrochina Southwest Oil&Gas Filed Company,Chongqing 401147,China)

机构地区：[1]西南石油大学土木工程与测绘学院,四川成都610500 [2]华北石油管理局有限公司物资分公司,河北沧州062552 [3]中国石油天然气股份有限公司西南油气田分公司重庆气矿,重庆401147

出　　处：《材料保护》2022年第3期60-66,共7页Materials Protection

摘　　要：为解决部分在役管线设计初未考虑输送含硫原油带来的腐蚀问题,利用高温高压反应釜模拟含硫原油运输管线的腐蚀环境,通过室内试验研究X52、X65 2种管线钢在不同种类原油、不同温度、不同流速、不同压力、不同含水率、不同缺陷中的腐蚀行为。采用扫描电子显微镜观察、分析2种管线钢腐蚀前后的变化,利用最严重腐蚀工况处的腐蚀速率估算管线有效输送年限。结果表明:随硫含量、温度、流速、含水率、缺陷面积5类因素值的增加,X52、X65 2种管线钢在含硫原油中的腐蚀速率显著增大,但压力因素的变化对X52、X65管线钢的影响较小;在相同试验条件下,X65管线钢均表现出优于X52管线钢的抗蚀性能,估算X52管线钢的有效输送年限显著低于X65管线钢的。Some in-service pipelines were not designed to transport sour crude oil, which brought corrosion problems. To solve this problem, the corrosion environment of sour crude oil transportation pipeline was simulated by using high-temperature and high-pressure reactor. The corrosion behaviors of X52 and X65 pipeline steels in different kinds of crude oil, different temperature, different flow rate, different pressure, different water content and different defects were studied by laboratory test. The changes of two kinds of pipeline steel before and after corrosion were observed and analyzed by scanning electron microscope. The effective transportation life of pipeline was estimated by the corrosion rate at the most severe corrosion condition. Results showed that with the increase of sulfur content, temperature, flow rate, water content and defect area, the corrosion rate of X52 and X65 pipeline steel in sour crude oil increased significantly, but the change of pressure factor had little effect on X52 and X65 pipeline steel. Under the same test conditions, X65 pipeline steel exhibited better corrosion resistance than X52 pipeline steel, and it was estimated that the effective transportation life of X52 pipeline steel was significantly lower than that of X65 pipeline steel.

关 键 词：管线钢 含硫原油 腐蚀速率 微观形貌 输送年限 

分 类 号：TE988[石油与天然气工程—石油机械设备]