Cr13钢在含CO_2油田采出液中腐蚀行为的实验研究  

Experimental Study of Corrosion Behavior of Cr13 Stainless Steel in Oilfield Produced Liquid Containing Saturated CO_2

作　　者：毕凤琴[1] 管轶鑫 孙振旭 张旭昀[1] 王勇[1] 

机构地区：[1]东北石油大学机械科学与工程学院 [2]中国石油集团长城钻探工程有限公司工程技术研究院

出　　处：《化工机械》2016年第6期727-730,共4页Chemical Engineering & Machinery

基　　金：黑龙江省自然科学基金项目(QC2013C056);黑龙江省教育厅科学技术研究项目(12541079)

摘　　要：采用静态电化学测试和动态高温高压腐蚀方法,研究了Cr13钢在含CO_2的油田采出液中的腐蚀行为,分析了Cl^-浓度和温度对Cr13钢CO_2腐蚀性能的影响规律,分析了扫描电镜腐蚀形貌。结果表明:Cr13钢在含CO_2的油田采出液中呈现出明显的钝化行为,随着温度的增加,Cr13钢钝化电流密度呈现先增加后降低的趋势,60℃时达到极值;随着Cl-浓度的增加,Cr13钢钝化电流增加,耐蚀性降低;这主要是由表面膜层疏松程度不同所导致的。Through making use of electrochemical testing method and high-temperature and high-pressure corrosion testing methods, both static and dynamic corrosion of Cr13 stainless steel in the oilfield produced liquid containing saturated CO2 was studied and the effects of CI＂ concentration and temperature on corrosion resistance of the Cr13 stainless steel were analyzed, including the corrosion morphology scanned by the electron microscope. The results show that, the Cr13 stainless steel exhibits obvious passivation behavior; and with the increase of temperature, the Cr13 steel＇s passivation current becomes increased at first and then decreased and current density can arrive in the extremum at 60℃; with the increase of Cl coneentration, the Cr13 steel＇ s passivation current becomes increased along with a decreased corrosion resistance, the loose surface film incurs it .

关 键 词：Cr13钢 CO2腐蚀 温度 CL^-浓度 钝化电流密度 

分 类 号：TQ050.91[化学工程]