超临界CO_2/地层水体系中N80钢的腐蚀行为及缓蚀剂的作用效果
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- 英文论文题名：Corrosion Behavior of N80 Steel and Inhibitive Effect in Supercritical Carbon Dioxide/Formation Water System
- 论文作者：陈成 ; 廖博凯 ; 陈振宇 ; 邱于兵 ; 郭兴蓬
- 英文论文作者：CHEN Cheng ; LIAO Bo-kai ; CHEN Zhen-yu ; QIU Yu-bing ; GUO Xing-peng ; School of Chemistry and Chemical Engineering ; Hubei Key Laboratory of Materials Chemistry and Service Failure ; Huazhong University of Science and Technology
- 年：2014
- 作者机构：华中科技大学化学与化工学院材料化学与服役失效湖北省重点实验室;
- 论文关键词：N80碳钢 ; 超临界CO_2 ; 地层水 ; 咪唑啉缓蚀剂
- 英文论文关键词：N80 steel ; supercritical CO_2 ; formation water ; imidazoline inhibitor
- 会议召开时间：2014-07-28
- 会议录名称：第十八届全国缓蚀剂学术讨论会论文集
- 语种：中文
- 分类号：TG174.42
- 学会代码：ZGHA
- 会议名称：第十八届全国缓蚀剂学术讨论及应用技术经验交流会
- 会议地点：中国四川成都
- 主办单位：中国腐蚀与防护学会缓蚀剂专业委员会
- 学会名称：中国腐蚀与防护学会缓蚀剂专业委员会
- 页数：4
- 文件大小：4634k
- 原文格式：O
- 会议级别：全国
摘要
采用失重法和电化学法研究了超临界二氧化碳/地层水体系中N80钢的腐蚀行为和改性咪唑啉缓蚀剂的缓蚀作用。结果表明,40℃时,N80碳钢的腐蚀速率随着CO_2分压和搅拌速度的增大而增大。当体系中加入100 mg/L改性咪唑啉缓蚀剂,搅拌速度达到1 m/s时,CO_2压力由非超临界增加到超临界条件时,缓蚀效率由非超临界条件下的98.91%降低87.16%。咪唑啉属于阳离子型缓蚀剂,当压力达到超临界以上时,溶液中氢离子浓度增大,碳钢表面剩余正电荷增多,缓蚀剂在碳钢表面的吸附力作用减弱,随着搅拌速度增大,部分缓蚀剂受到流体剪切力作用而从碳钢表面脱附。
The inhibitive effect of a newly synthesized modified imidazoline inhibitor against N80 carbon steel was investigated in supercritical carbon dioxide/formation water system using weight-loss method and electrochemical techniques.The results show that the corrosion rate increased with the increase of the partial pressure of CO_2(PCO_2) and flow rate at 40℃.When the flow rate reached lm/s and 100 mg/L inhibitor was added,the inhibition efficiency decreased from 98.91%to 87.16%.Imidazoline inhibitor are cationic inhibitor and the concentration of hydrogen ion and surface residual positive charge will increase when the pressure is up to 7.38 MPa,thus the adsorption affinity of inhibitor will decrease.In this case,it is easier to be desorbed when the flow rate increases.In addition,some of the inhibitor will strip from the surface of carbon steel by the flow sheer stress.
The inhibitive effect of a newly synthesized modified imidazoline inhibitor against N80 carbon steel was investigated in supercritical carbon dioxide/formation water system using weight-loss method and electrochemical techniques.The results show that the corrosion rate increased with the increase of the partial pressure of CO_2(PCO_2) and flow rate at 40℃.When the flow rate reached lm/s and 100 mg/L inhibitor was added,the inhibition efficiency decreased from 98.91%to 87.16%.Imidazoline inhibitor are cationic inhibitor and the concentration of hydrogen ion and surface residual positive charge will increase when the pressure is up to 7.38 MPa,thus the adsorption affinity of inhibitor will decrease.In this case,it is easier to be desorbed when the flow rate increases.In addition,some of the inhibitor will strip from the surface of carbon steel by the flow sheer stress.
引文
[1]CHOI Y S,NESIC S.Corrosion behaviour of carbon steel in supercritical CO_2/water environments[C]//Corrosion/2009,NACE International,Houston/TX,2009,Paper No.256.
[2]ZHAO J M,CHEN G H,The synergistic inhibition effect of oleic-based imidazoline and sodium benzoate on mild steel corrosion in a CO_2-saturated brine solution[J],Electrochimica Acta,2012,69:247-255.
[3]ZHANG Y.Discussion of the CO_2 corrosion mechanism between low partial pressure and supercritical condition.[J]Corrosion Science 2010,59:186-197.
[4]WU S L,CUI Z D,ZHAO G X,et al,EIS study of the surface film on the surface of carbon steel from supercritic et al al carbon dioxide corrosion,[J]Applied Surface Science,2004:228 17-25.
[6]MANN C A,LAUER B E,HULTION C T.Organic inhibitors of corrosion-aromatic amines,[J]Industrial&Engineering Chemistry Research,1936(28):148-158.
[7]ZHANG Y C,GAO K W,SCHMTTT G.Effect of water on steel corrosion under supercritical CO_2conditions,[J]Mater、Performance,2011(50):62-68.
[2]ZHAO J M,CHEN G H,The synergistic inhibition effect of oleic-based imidazoline and sodium benzoate on mild steel corrosion in a CO_2-saturated brine solution[J],Electrochimica Acta,2012,69:247-255.
[3]ZHANG Y.Discussion of the CO_2 corrosion mechanism between low partial pressure and supercritical condition.[J]Corrosion Science 2010,59:186-197.
[4]WU S L,CUI Z D,ZHAO G X,et al,EIS study of the surface film on the surface of carbon steel from supercritic et al al carbon dioxide corrosion,[J]Applied Surface Science,2004:228 17-25.
[6]MANN C A,LAUER B E,HULTION C T.Organic inhibitors of corrosion-aromatic amines,[J]Industrial&Engineering Chemistry Research,1936(28):148-158.
[7]ZHANG Y C,GAO K W,SCHMTTT G.Effect of water on steel corrosion under supercritical CO_2conditions,[J]Mater、Performance,2011(50):62-68.