温度对CT80连续油管钢电化学腐蚀行为的影响
Effect of Temperature on Electrochemical Corrosion Behavior of CT80 Coiled Tubing Steel
摘 要
采用动电位极化和电化学阻抗方法,研究了CT80连续油管钢在不同温度(20,40,60,80 ℃)的3.5% NaCl溶液中的腐蚀行为.结果表明,随着温度的升高,CT80钢的开路电位呈现先负移后正移的趋势,在60 ℃时达到最小;CT80钢的自腐蚀电流密度呈先升高后降低的趋势,在60 ℃时具有最大的自腐蚀电流密度,腐蚀速率最大;CT80钢的极化电阻随温度升高呈先减小后增大的趋势,在60 ℃时极化电阻最小,相应的腐蚀速率最大.
温度
动力学参数
开路电位
电化学阻抗谱
CT80 steel
temperature
dynamic parameter
open circuit potential
electrochemical impedance spectroscopy (EIS)
Abstract
Potentiodynamic polarization measurement and electrochemical impendence spectroscopy were employed to investigate the corrosion behavior of CT80 coiled tubing steel in 3.5% NaCl solution at different temperature(20 ℃,40 ℃,60 ℃,80 ℃).The results showed that with the rise of temperature,the open circuit potential of CT80 coiled tubing steel shifted to the negative direction and then to the positive direction,it reached the minimum at 60 ℃,the corrosion current density of high CT80 coiled tubing steel firstly increased then decreased,it reached the maximum at 60 ℃,and its corrosion rate came to the maximum at 60 ℃,and the polarization resistance of CT80 coiled tubing steel firstly decreased and then increased,it reached the minimum at 60 ℃ with the maximum corrosion rate.
中图分类号 TG172
所属栏目 石油管道防腐蚀
基金项目
收稿日期 2014/4/14
修改稿日期
网络出版日期
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备注任国琪(1988-),硕士研究生,从事材料腐蚀机理与应用技术.
引用该论文: REN Guo-qi,SHEN Yi,WANG Rong,WEI Jia. Effect of Temperature on Electrochemical Corrosion Behavior of CT80 Coiled Tubing Steel[J]. Corrosion & Protection, 2015, 36(3): 245
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参考文献
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【2】BI Z Y,WANG R,JING X T.Grooving corrosion of oil coiled tubes manufactured by electrical resistance welding[J].Corr Sci,2012,57(4):67-73.
【3】CHENG Y F,WILMOTT M,LUO J L.Analysis of the role of electrode capacitance on the initiation of pits for A516 carbon steel by electrochemical noise measurements[J].Corr Sci,1999,41(7):1245-1256.
【4】GRIGORIS E K,STEFANO M S.Pitting corrosion of artificially aged T6AA2024/SiCp composites in 3.5% NaCl aqueous solution[J].Corr Sci,2007,49(6):2711-2725.
【5】AZZERRI N,MANCIA F,TAMBA A.Electrochemical prediction of corrosion behavior of stainless steels in chloride-containing water[J].Corr Sci,1982,22(7):675-687.
【6】孙建波,柳伟,杨丽颖,等.高矿化度介质中J55钢的CO2腐蚀电化学行为[J].金属学报,2008,44(8):991-994.
【7】ROCCHINI G.Evaluation of the electrochemical parameters by means of series expansion[J].Corr Sci,1994,36(8):1347-1361.
【8】宋诗哲.腐蚀电化学研究方法[M].北京:化学工业出版社,1988:120-135.
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【10】SHAMS El Din A M,Mohammed R A,Haggag H H.Corrosion inhibition by molybdate/polymaliate mixtures[J].Desalination,1997,114(1):85-95.
【11】ZHANG X,PEHKONEN S O,KOCHERGINSKY N,et al.Copper corrosion in mildly alkaline water with the disinfectant monochloramine[J].Corr Sci,2002,44:2507-2528.
【12】SOBRAL A V C,RISTOW J R W,AZAMBUJIA D S,et al.Potentiodynamic tests and electrochemical impedance spectroscopy of injection molded 316L steel in NaCl solution[J].Corr Sci,2001,43:1019-1030.
【13】SRDJAN N.Key issues related to modelling of internal corrosion of oil and gas pipelines-areview[J].Corr Sci,2007,49:4308-4338.
【14】GILEADI E,KIROWA-EISNER E.Some observations concerning the tafel equation and its relevance to charge transfer in corrosion[J].Corr Sci,2005,47(12):3068-3085.
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