含S+CO_2油田介质中S对P110钢腐蚀膜的影响  

Influence of S on Corrosion Film of P110 Steel in S+CO_2 Oilfield

作　　者：唐婷[1] 陈建[1] 赵菁[1] 姚小飞[1] 刘赟姿 

机构地区：[1]西安工业大学材料与化工学院,西安710021

出　　处：《西安工业大学学报》2017年第4期315-320,共6页Journal of Xi’an Technological University

基　　金：陕西省青年科技新星专项(2013KJXX-61);陕西省工业攻关项目(2012K07-08)

摘　　要：为了研究S对P110钢在含S+CO_2环境下腐蚀产物膜的影响,模拟含S+CO_2石油采出液成分,采用浸泡试验对油套管P110钢的腐蚀行为进行研究.通过预测腐蚀速率,利用扫描电子显微镜观察不同腐蚀时间内的腐蚀产物膜形貌,分析了腐蚀产物膜层的演变过程.研究结果表明:随腐蚀时间的延长,膜层颗粒逐渐细化并形成胶状粘合后发生皲裂.CO_2对P110钢产生均匀腐蚀,且形成的FeCO_3腐蚀膜层减缓腐蚀;S对FeCO_3腐蚀膜层产生破坏,加速腐蚀,且形成点蚀,与CO_2和温度因素相比较,S浓度对P110钢加速腐蚀的作用更大.In order to study the effect of S on the corrosion products of Pll0 steel in the presence of S＋ CO2 ,the corrosion behavior of P110 steel in simulated oil well produced water containing S＋CO2is examined. It reveales the corrosion rate, the corrosion product film morphology by SEM （Scanning Electron Microscope） and the evolution process of the corrosion product film layer. The results show： With the extension of time,the corrosion grains are gradually refined and changed from a colloidal state to the rhagadia; The P110 steel is corroded uniformly by CO2, and FeCO3 corrosion film layer is produced,which inhabites the corrosion of matrix; With the addition of S, the film is destroyed, the corrosion rate is accelerated and corrosion pits are formed finally;Comparised with the effect of CO2 and temperature,the concentration of S makes a greater impact on the corrosion of P110 steel.

关 键 词：P110钢 S+CO2共存 腐蚀速率 腐蚀产物膜 S浓度 

分 类 号：TE983[石油与天然气工程—石油机械设备] TG178[金属学及工艺—金属表面处理]