摘要
本文通过EDS法分析静态挂片表面的元素组成,将动电位扫描极化曲线和滞后环等电化学实验相结合,对实验室和现场垢样的SEM和XRD的形貌和组成进行分析,研究了Q235钢在M24油井采出液系统中的腐蚀行为,用旋转挂片法对缓蚀剂进行了筛选,参照GB/T6324.1做了水溶性测定实验,参照SYT5273-2000实验方法进行了乳化倾向测定。结果表明M24油井采出液系统中引起腐蚀穿孔的原因是垢下腐蚀而不是点蚀,腐蚀的速度受腐蚀反应的阳极过程控制;用旋转挂片仪筛选出的自制缓蚀剂用量50mg/L,缓蚀率超过90%,缓蚀剂起到缓蚀作用的根本原因是抑制了电极反应的阳极过程;缓蚀剂在水中溶解性好;有轻微乳化现象,但在水相中的有效成分没有减少。
The element on the surface of static hang pieces was analyzed by EDS.The appearance and composition of the laboratory and the field scaling samples were analyzed by SEM and XRD combined with some electrochemical measurements such as potentiodynamic polarization curves and hysteresis loop,corrosion mechanism of 235 steel in injection water of an oilfield have been studied.The results showed that under-fouling corrosion was the reason of corrosion failure which was caused by injection water of an oilfield.The corrosion rate was controlled by anodic process.The corrosion inhibitory efficiency was over 90% when dosage of corrosion inhibitor screened out by weight loss tests was 50mg/L.The main function of the corrosion inhibitor is that the anodic process of electrode reaction is restrained.
出处
《全面腐蚀控制》
2010年第10期45-48,共4页
Total Corrosion Control
关键词
腐蚀
极化曲线
回注水
缓蚀剂
腐蚀机理
corrosion
polarization
injection water
corrosion inhibitor
corrosion mechanism
