Effects of Acetic Acid and HCO3- Concentrations in Simulated Produced Water of Oil Well on Corrosion Behavior of L245 Steel
摘 要
采用含乙酸、饱和二氧化碳和碳酸氢钠的水溶液模拟我国西部油气田采出水;通过浸泡试验、电化学试验、扫描电镜(SEM)和X射线衍射仪(XRD)研究了L245钢在乙酸含量不同的模拟油田采出水中的腐蚀行为。结果表明:50℃下,乙酸的加入对腐蚀的阴极反应有促进作用,当乙酸含量增加到一定程度时,试样表面的腐蚀产物膜溶解,生成易溶于水的乙酸铁盐。
Abstract
The produced water of oil well in west China was simulated by aqueous solution containing sodium bicarbonate,acetic acid and saturated carbon dioxide.By means of corrosion immersion testing,electrochemical testing,scanning electron microscopy (SEM) and X-ray diffraction (XRD),the corrosion behavior of L245 steel in the simulated produced water with different acetic acid concentrations were studied.The results show that at 50℃,the addition of acetic acid promoted the cathodic reaction of corrosion.When the concentration of acetic acid increased to a certain extent,the corrosion product film dissolved on the surface of the sample to form acetic acid salt soluble in water.
中图分类号 TB304 DOI 10.11973/fsyfh-201904007
所属栏目 试验研究
基金项目 西安科技大学博士启动基金(2015QDJ013);陕西省教育厅专项科研计划(15JK1489)
收稿日期 2017/9/18
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引用该论文: CAO Boyuan,ZHU Ming,LI Junyi,RONG Huan,ZHANG Huihui. Effects of Acetic Acid and HCO3- Concentrations in Simulated Produced Water of Oil Well on Corrosion Behavior of L245 Steel[J]. Corrosion & Protection, 2019, 40(4): 271
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参考文献
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【2】HEDGES B,MCVEIGH L.The role of acetate in CO2 corrosion:the double whammy[C]//Corrosion 1999. Houston,Texas:NACE,1999:21.
【3】GARSANY Y,PLETCHER D,HEDGES B. Speciation and electrochemistry of brines containing acetate ion and carbon dioxide[J]. J Electroanaly Chem,2002,538:285-297.
【4】张念东,彭素英. 基于油气井伴产水中醋酸含量对管道腐蚀的影响研究[J]. 兰州石化职业技术学报,2014,12(4):15-19.
【5】NEŠIC S. Key issues related to modeling of internal corrosion of oil and gas pipelines-a review[J]. Corrosion Science 2007,49(12):4308-4338.
【6】CROLET J L,THEVENOT N,DUGSTAD A. Role of free acetic acid on the CO2 corrosion of steel[J]. Corrosion,1999,24(3):115-120.
【7】刘东,邱于兵,郭兴蓬. N80碳钢CO2/HAc腐蚀电化学过程[J]. 中国腐蚀与防护学报,2009,29(1):44-49.
【8】赵博,杜翠薇,刘智勇. Cl-和HCO3-对N80钢阳极电化学行为的协同作用[J]. 北京科技大学学报,2012,34(12):1385-1390.
【9】VIDEM K,KOREN A M. Corrosion,passivity,and pitting of carbon steel in aqueous solutions of HCO3-,CO2,and Cl-[J]. Corrosion,1993,49(9):746-754.
【10】JASINSKI R. Corrosion of N80 steel by CO2 water mixtures[J]. Corrosion,1987,43(4):214-218.
【11】张艳丽. X65碳钢和316L不锈钢在模拟油田采出水中的腐蚀行为研究[D]. 青岛:中国海洋大学,2014.
【12】ZHU S D,WEI J F,YIN Z F. Acetic acid corrosion behavior of N80 steel[J]. Corrosion Science & Protection Technology,2010,22(2):94-97.
【13】SUN Y,GEORGE K,NESIC S. The effect of Cl- and acetic acid on localized CO2 corrosion in wet gas flow[C]//Corrosion 2003. Houston,TX:NACE International,2003:03327.
【14】WANG S,GEORGE K,NESIC S. High pressure CO2 corrosion electrochemistry and the effect of acetic acid[C]//Corrosion 2004. Houston,TX:NACE International,2004:04375.
【15】GUOX P,CHENZ Y,LIU D. The effect of acetic acid acetate on CO2 corrosion on carbon steel[C]//Corrosion 2005. Houston,TX:NACE International,2005:05306.
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