L245钢在不同温度下的油气田模拟水中的腐蚀行为研究  

Corrosion Behavior of L245 Steel in Simulated Oilfield Produced Water at Different Temperatures

作　　者：朱明[1] 余勇[1] 张慧慧[1] ZHU Ming YU Yong ZHANG Huihui(College of Materials Science and Engineering, Xi＇an University of Science and Technology, Xi＇an 710054, China)

机构地区：[1]西安科技大学材料科学与工程学院,西安710054

出　　处：《中国腐蚀与防护学报》2017年第3期300-304,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51201131);西安科技大学培育基金(6310214005);西安科技大学博士启动金(6310115012)~~

摘　　要：采用浸泡失重法、动电位极化曲线和电化学阻抗技术研究了L245钢在不同温度下的油气田模拟水中的腐蚀行为,采用SEM分析了腐蚀产物的表面形貌。结果表明:在饱和CO_2条件的溶液中,当温度从30℃升高至90℃时L245钢的腐蚀电流从66.1μA·cm^(-2)升高到177μA·cm^(-2),说明L245钢在高温下反应比较剧烈。当温度从30℃升高至90℃时L245钢的电荷转移电阻从5155Ω·cm^2减小到1182Ω·cm^2,说明温度的升高减小了腐蚀反应的阻力。以上结果表明,在30~90℃时L245钢在油气田模拟水中的腐蚀速率随着温度的升高而加快,当温度升高至60℃时开始发生局部腐蚀并随着温度升高而加剧。The corrosion behavior of L245 steel in simulated oilfield produced water was investigated by means of weight loss measurement,polarization curve measurement,electrochemical impedance spectra（EIS） and SEM.The results showed that the corrosion reaction of L245 steel is more intensive at higher temperature.When the temperature of the solution is elevated from 30 ℃ to 90 ℃,the corrosion current density of L245 steel in the solution with saturated CO2 increases from 66.1 μA·cm-2 to 177 μA·cm-2 while the charge transfer resistance of L245 steel decreased from 5155 Ω·cm2 to 1182 Ω·cm2.The above results indicated that the corrosivity of oilfield produced water increased with the increasing temperature within the range of 3090 ℃,localized corrosion of the steel occurred at 60 ℃,then the localized corrosion would be intensified when the temperature is elevated to 90 ℃.

关 键 词：L245钢 油田模拟水 温度 腐蚀速率 

分 类 号：TB304[一般工业技术—材料科学与工程]