摘要
利用高温高压釜,通过失重法、SEM、XRD以及电子探针进行微观结构分析,对90、120、150℃时X65钢在模拟油气田CO2/H2S环境中的腐蚀行为进行研究.结果表明:在实验条件下,X65钢发生严重的CO2/H2S腐蚀.随着温度的升高,腐蚀速率呈上升再下降的趋势(120℃时为最大值).表面都生成了FeCO3为主的腐蚀产物膜;CO2/H2S腐蚀的协同作用形成了钢表面独特的点蚀和台地腐蚀特征.CO2/H2S腐蚀是各种因素相互作用的结果.
The CO2/H2S corrosion behavior of steel X65 in simulated environment oil and natural gases fields at 90 ,120, 150 ℃, were investigated by using autoclave, SEM, XRD, weight-loss method, and electron-probe micro-analysis. The result showed that steel X65 was corroded seriously by CO2/H2S in our experiment condition. With temperature increasing, the corrosion rate of steel X65 exhibited tendency from increase to decrease （the maximum of corrosion rate appeared at the temperature of 120℃）, the main corrosion products was FeCO3 on the surface of the samples. The synergistic effect of CO2/H2S corrosion made the surface of steel have a special corrosion feature of the coexistence of pitting corrosion and mesa corrosion. Finally, it was suggested that the corrosion of CO2/H2S was the result of interaction of multifactors.
出处
《兰州理工大学学报》
CAS
北大核心
2007年第4期18-21,共4页
Journal of Lanzhou University of Technology
基金
甘肃省自然科学基金(3ZS062-B25-025)
关键词
CO2
H2S
X65钢
腐蚀速率高温高压
CO2
H2S
steel X65
corrosion rate
high-temperature and high-pressure
