温度对油田注水管道内电化学腐蚀的影响
Effect of Temperature on Electrochemical Corrosion of Internal Injection Pipe in an Oil Field
摘 要
采用电化学腐蚀试验,X-射线衍射和X-射线能谱仪等方法对20号管线钢在不同温度中延长油田注水水质进行腐蚀模拟试验验.结果表明,随着注水温度的升高,20号管线钢延长油田注水水质中的腐蚀速率先增加后减小;腐蚀过程趋于以氧扩散过程控制;20号管线钢表面腐蚀产物成分主要是FeCO3和Fe2O3,腐蚀产物中含有大量的垢样,结垢的主要成分为CaCO3,注水管道存在垢下腐蚀,通过腐蚀模拟试验确定延长油田注水管道在55 ℃时腐蚀速率最大.
腐蚀电化学
注水管道
腐蚀机理
20 steel pipeline steel
electrochemical corrosion
water injection pipeline
corrosion mechanism
Abstract
The corrosion simulation test of 20 steel pipelines with injection water of an oilfield was carried out at different temperatures adopting the methods of electrochemical test,X-ray diffraction and X-ray energy dispersive spectrometer.The results showed that with the increase of temperature of injection water,the corrosion rate of 20 steel increased firstly and then decreased,the corrosion process tended to be controlled by oxygen diffusion.The composition of the corrosion products on the surface of 20 steel were mainly FeCO3 and Fe2O3.The corrosion products contained a large number of scale and the main component of the scale was CaCO3.There was corrosion under the scale of water injection pipeline.The simulation experiment showed that the maximum corrosion rate of Yanchang oil field water injection pipe was at 55 ℃.
中图分类号 TG172
所属栏目 石油管道防腐蚀
基金项目 西安石油大学青年科技创新(YS28032501)
收稿日期 2014/7/15
修改稿日期
网络出版日期
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备注徐士祺(1979-),讲师,博士,从事油气设施的腐蚀与防护研究.
引用该论文: XU Shi-qi. Effect of Temperature on Electrochemical Corrosion of Internal Injection Pipe in an Oil Field[J]. Corrosion & Protection, 2015, 36(3): 226
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【5】刘栓,孙虎元,孙立娟.pH值和温度对镀锌钢在模拟锈层溶液中电化学腐蚀行为的影响[J].功能材料,2013,44(6):858-861.
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【9】BI Z Y,WANG R,JING X T.Grooving corrosion of oil coiled tubes manufactured by electrical resistance welding[J].Corros Sci,2012,57(4):67-68.
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