含CO_(2)原油对输油泵FV520B钢叶轮的腐蚀行为研究  

STUDY ON CORROSION BEHAVIOR OF CRUDE OIL CONTAINING CO_(2) ON FV520B STEEL IMPELLER OF OIL PUMP

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)

机构地区：[1]国家管网集团西南管道有限责任公司,四川成都610041 [2]攀枝花华润燃气有限公司,四川攀枝花617000 [3]中国石油天然气股份有限公司西南油气田分公司川东北气矿,四川达州636150

出　　处：《石油化工设备技术》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。

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.

关 键 词：含CO_(2)原油 输油泵叶轮 冲刷腐蚀 气蚀 

分 类 号：TE988[石油与天然气工程—石油机械设备]