摘要
采用称重法研究了油井采出液成分与温度对Q235钢腐蚀行为的影响;运用极化曲线和滞后环等电化学方法结合SEM和XRD等方法,研究了Q235钢的腐蚀机理。结果表明:采出液中Cl-、SO42-对腐蚀速率影响较大,而HCO3-、Ca2+影响较小;随着Cl-、SO42-浓度的增大试验钢的腐蚀速率增大;随着HCO3-浓度的增大试验钢的腐蚀速率先增大后减小;Ca2+浓度很小时,对试验钢的腐蚀速率没有明显的影响,但当Ca2+质量浓度达到240 mg.L-1时,腐蚀速率迅速降低;在80℃之前,试验钢的腐蚀速率随温度升高而加快;试验钢的腐蚀机理为垢下腐蚀。
The effect of component and temperature of the oil-well produced water on the corrosion behavior of Q235 steel was studied using weight loss test method.Corrosion mechanisms of Q235 steel in the produced water were studied by electrochemical measurements such as polarization curves and hysteresis loop combined with SEM and XRD.The results shows that Cl-and SO2-4 had greater effect on the corrosion rate of Q235 steel than HCO-3 and Ca2+.Corrosion rate of the Q235 steel were accelerated always with the increa...
出处
《机械工程材料》
CAS
CSCD
北大核心
2008年第12期25-28,共4页
Materials For Mechanical Engineering
基金
新材料及其制备新技术广西区重点实验室开放式基金资助项目
关键词
Q235钢
腐蚀
极化曲线
油井采出液
垢下腐蚀
Q235 steel
corrosion
polarization curve
oil-well produced water
under-deposit corrosion
