P110钢与3Cr钢在采出井模拟工况中的腐蚀行为研究  

Research on corrosion behavior of P110 steel and 3Cr steelin simulated working conditions of production wells

作　　者：解辉 于超 花靖 蒋秀 孟晓锋 XIE Hui;YU Chao;HUA Jing;JIANG Xiu;MENG Xiaofeng(State Key Laboratory of Chemical Safety,Qingdao 266100,China;SINOPEC Research Institute of Safety Engineering Co.,Ltd.,Qingdao 266100,China;National Registration Center for Chemicals,Ministry of Emergency Management,Qingdao 266100,China;Chunliang Oil Production Plant of SINOPEC Shengli Oilfield Branch,Binzhou 256504,China)

机构地区：[1]化学品安全全国重点实验室,山东青岛266100 [2]中石化安全工程研究院有限公司,山东青岛266100 [3]应急管理部化学品登记中心,山东青岛266100 [4]中国石油化工股份有限公司胜利油田分公司纯梁采油厂,山东滨州256504

出　　处：《石油化工腐蚀与防护》2025年第1期16-23,共8页Corrosion & Protection In Petrochemical Industry

基　　金：中国石油化工股份有限公司科技攻关项目(320144)。

摘　　要：采用高温高压釜模拟P110钢与3Cr钢在不同气窜程度下的采出井腐蚀工况,通过质量损失法测得腐蚀速率,采用扫描电镜(SEM)、拉曼光谱仪(Raman)、能谱仪(EDS)和三维轮廓仪(3D Profilometer)对腐蚀产物的形貌与成分进行分析,考察了不同井深处金属的腐蚀行为差异。结果表明:3Cr钢的均匀腐蚀速率和最大点蚀速率低于P110钢,且两种金属均发生明显的点蚀行为。随着井深的增加和CO_(2)体积分数的增加,3Cr钢的均匀腐蚀速率总体呈现逐渐上升的趋势,P110钢均匀腐蚀速率呈现先上升后下降的趋势;P110钢表面腐蚀产物成分以FeCO_(3)为主;3Cr钢在低温和低CO_(2)分压下其表面腐蚀产物主要为FeCr_(2)O_(4)和Cr(OH)_(3),在高温和高CO_(2)分压下,3Cr钢表面腐蚀产物为双层膜,外层膜以FeCO_(3)为主,内层膜主要为FeCr_(2)O_(4)和Cr(OH)_(3)。The high temperature and high pressure autoclave was used to simulate the corrosion conditions of P110 steel and 3Cr steel in production wells under different gas channeling degrees,and the corrosion rate was measured by mass loss method.To investigate the differences in corrosion behavior of metals at different depths of the well,the morphology of the corrosion products was analyzed by using scanning electron microscopy(SEM),Raman spectroscopy(Raman)and three-dimensional profilometer(3D profilometer),and its composition was analyzed by using energy dispersive spectroscopy(EDS).The results showed that the uniform corrosion rate and maximum pitting corrosion rate of 3Cr steel were lower than those of P110 steel,and both metals exhibited significant pitting corrosion behavior.As the well depth and CO_(2)volume fraction increased,the uniform corrosion rate of 3Cr steel generally showed a gradually increasing trend,while the uniform corrosion rate of P110 steel showed a trend of first increasing and then decreasing.The main composition of corrosion products on the surface of P110 steel was FeCO_(3);at low temperature and low CO_(2)partial pressure,the main corrosion products on the surface of 3Cr steel were FeCr_(2)O_(4)and Cr(OH)_(3);while at high temperature and high CO_(2)partial pressure,the corrosion products on the surface of 3Cr steel were a double-layer film with the outer film mainly composed of FeCO_(3)and the inner film mainly composed of FeCr_(2)O_(4)and Cr(OH)_(3).

关 键 词：P110钢 3Cr钢 温度 CO_(2)分压 腐蚀产物膜 

分 类 号：TG1[金属学及工艺—金属学]