西安工业大学学报
西安工業大學學報
서안공업대학학보
JOURNAL OF XI'AN TECHNOLOGICAL UNIVERSITY
2014年
4期
320-324,330
,共6页
周学阳%陈建%苗健%杨洋%白真权%严文
週學暘%陳建%苗健%楊洋%白真權%嚴文
주학양%진건%묘건%양양%백진권%엄문
P110钢%元素硫%电化学%极化曲线%电化学阻抗谱
P110鋼%元素硫%電化學%極化麯線%電化學阻抗譜
P110강%원소류%전화학%겁화곡선%전화학조항보
P110 steel%elemental sulfur%electrochemistry%polarization curves%electro-chemical impedance spectroscopy
针对当前S/CO2共存条件下的腐蚀研究不足,通过模拟油气田采出液腐蚀环境,采用电化学方法研究了温度对P110油套管腐蚀电化学行为的影响.利用电化学测试系统进行了开路电位、极化曲线和电化学交流阻抗谱测试.研究结果表明:随着温度的升高,P110钢在模拟介质中的开路电位降低了67mV,自腐蚀电流密度从3.68μA/cm2增加到56.4μA/cm2,阴极极化曲线Tafel斜率大于阳极极化曲线斜率,阴极过程由活化控制转变成由活化和扩散协同控制.腐蚀反应主要由阴极反应过程控制.90℃时,阴极反应控制减弱,交流阻抗谱曲线在低频区出现Warburg阻抗.
針對噹前S/CO2共存條件下的腐蝕研究不足,通過模擬油氣田採齣液腐蝕環境,採用電化學方法研究瞭溫度對P110油套管腐蝕電化學行為的影響.利用電化學測試繫統進行瞭開路電位、極化麯線和電化學交流阻抗譜測試.研究結果錶明:隨著溫度的升高,P110鋼在模擬介質中的開路電位降低瞭67mV,自腐蝕電流密度從3.68μA/cm2增加到56.4μA/cm2,陰極極化麯線Tafel斜率大于暘極極化麯線斜率,陰極過程由活化控製轉變成由活化和擴散協同控製.腐蝕反應主要由陰極反應過程控製.90℃時,陰極反應控製減弱,交流阻抗譜麯線在低頻區齣現Warburg阻抗.
침대당전S/CO2공존조건하적부식연구불족,통과모의유기전채출액부식배경,채용전화학방법연구료온도대P110유투관부식전화학행위적영향.이용전화학측시계통진행료개로전위、겁화곡선화전화학교류조항보측시.연구결과표명:수착온도적승고,P110강재모의개질중적개로전위강저료67mV,자부식전류밀도종3.68μA/cm2증가도56.4μA/cm2,음겁겁화곡선Tafel사솔대우양겁겁화곡선사솔,음겁과정유활화공제전변성유활화화확산협동공제.부식반응주요유음겁반응과정공제.90℃시,음겁반응공제감약,교류조항보곡선재저빈구출현Warburg조항.
The current study of corrosion on conditions of S and CO2 coexistence is not sufficient .The effects of various temperatures on the electrochemical behavior of API P 110 steel in simulated oilfield liquid environment are investigated .Electrochemical test system is used to test the open circuit potential (OCP) ,polarization curves and electrochemical impedance spectroscopy (EIS) .The results show :As the temperature increases from 25 ℃ to 90 ℃ ,the working electrode potential of API P110 carbon steel reduces 67 mV in the stimulant medium ,the corrosion current density increases from 3 .68 (μA/cm2 ) to 56 .4 (μA/cm2 ) ,and the slope of the cathodic polarization curve Tafel is greater than the slope of the anodic polarization curves ,cathodic process controlled by the activation into the cooperative control of activation and proliferation .T he corrosion process is controlled mainly by the cathode process .While it is 90 ℃ ,the catholic reaction control is weakened ,and its EIS appearances Warburg impedance in low frequency section .