摘要
CO_(2)是造成石油设备设施腐蚀严重的关键因素之一。文章针对现场CO_(2)驱块输油泵叶轮发生严重点蚀的问题,对腐蚀速率、腐蚀形貌和电位进行了综合分析,结果表明,FV520B钢腐蚀速率随管输压力和流速增大呈指数形式增大(R^(2)>0.9),电位发生负向偏移。随着管输压力的增大,试样表面腐蚀方向性特征逐渐消失,表现为显著区分的点蚀区域和全面腐蚀区域;而随着流速的增大,金属表面呈现出沟槽状冲刷腐蚀形貌,并且存在微小的蚀坑。这是由于在较高的管输压力和流速条件下气蚀造成的。
CO_(2) is one of the key factors that causes serious corrosion of petroleum equipment and facilities.Aiming at the problem of serious pitting corrosion in the impeller of oil pump in CO_(2) flooding field,the corrosion rate,corrosion morphology and potential are analyzed comprehensively in this paper.The results show that the corrosion rate of FV520B steel increases exponentially with the increase of pipeline transport pressure and flow rate(R 2>0.9),and the potential shifts negatively.With the increase of pipe pressure,the corrosion directivity of the specimen surface gradually disappears,indicating a distinct pitting area and a comprehensive corrosion area.With the increase of flow rate,the metal surface presents a grooved erosion morphology with small pits.This is due to cavitation under high pipe pressure and flow rate conditions.
作者
杨旸
侯宜辰
曹宇
Yang Yang;Hou Yichen;Cao Yu(National Pipe Network Group Southwest Pipeline Co.,Ltd.,Chengdu,Sichuan,610041;Panzhihua Huarun Gas Co.,Ltd.,Panzhihuan,Sichuan,617000;Northeast Sichuan Gas Field of PetroChina Southwest Oil and Gas Field Company,Dazhou,Sichuan,636150)
出处
《石油化工设备技术》
CAS
2024年第4期25-29,34,I0002,共7页
Petrochemical Equipment Technology
基金
国家石油天然气管网集团有限公司(批准号:JCGL202108)资助的课题。
关键词
含CO_(2)原油
输油泵叶轮
冲刷腐蚀
气蚀
crude oil containing CO_(2)
impeller of oil pump
erosion corrosion
cavitation
作者简介
杨旸,男,2012年毕业于西南石油大学过程装备与控制工程专业,学士,现从事智慧管网标准、油气管道工程数字化移交研究工作,曾获得中国石油和化学工业联合会科技进步奖,高级工程师,已发表论文5篇。Email:yangyang06@pipechina.com.cn。
