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·1390· 北京科技大学学报 第34卷 能由Fe0,向yFe,0,发生转变Dm on mild steels in bicarbonate solution by ElS.Electrochim Acta, 2002,47(13/14):2081 当溶液中含有0.01mol·L-1的Cl-时,b一c和 ]Liu Z Y,Dong C F,Jia ZJ.et al.Pitting corrosion of X70 pipe- c一d段消失,说明Fe(OH),和Fe(CO3),的生成因 line steel in the simulated wet storage environment.Acta Metall Cl的存在受到抑制.在e一f段维钝电流密度降 Sin,2011,47(8):1009 低,容抗弧半径减小,说明C~同时也会造成钝化膜 (刘智勇,董超芳,贾志军,等。X70钢在模拟潮湿存储环境 性质的变化和厚度的下降.在此阶段,V会优先 中的点蚀行为.金属学报,2011,47(8):1009) [8]Zeng Y M,Luo J L,Norton P R.Initiation and propagation of pit- 与C1ˉ结合生成COˉ,消耗大量的氧空缺位和氧离 ting and crevice corrosion of hydrogen-containing passive films on 子,抑制反应(6)~(8)的发生,从而影响钝化膜的 X70 micro-alloyed steel.Electrochim Acta,2004,49(5):703 生成.其反应方程式如下: 9]Wang Y,Yu H Y,Cheng Y,et al.Corrosion behaviors of X80 V2*+C→Cl0+ (9) pipeline steel in different simulated alkaline soil solution.Ade Ma- ter Res,2011,189H93:4261 同时,进入过钝化区后,C的存在使溶液体系 [10]Orlikowski J,Darowicki K.Investigations of pitting corrosion of 中试样的容抗弧半径迅速下降,说明Clˉ导致钝化 magnesium by means of DEIS and acoustic emission.Electrochim 膜在相对较低的电位下被迅速击穿,其保护性能较 Acta,2011,56(23):7880 不含Cl~的溶液体系有所下降. [11]Ryl J,Darowicki K,Slepski P.Evaluation of cavitation erosion- corrosion degradation of mild steel by means of dynamic imped- 3结论 ance spectroscopy in galvanostatic mode.Corros Sci,2011,53 (5):1873 CI~对N80钢在HCO,体系的钝化态及稳定性 [12]Li C T,Cheng X Q,Dong C F,et al.Influence of Cl"on the corrosion electrochemical behavior of alloy 690.Univ Sci Techn- 具有强烈的破坏作用,少量存在即可促使电极由钝 ol Beijing,2011,33(4):444 化向活化转变,极大提高了HCO3致钝的临界浓度, (李成涛,程学群,董超芳,等.C1ˉ对690合金腐蚀电化学 并影响钝化膜的生成.溶液体系中Cˉ浓度较低而 行为的影响.北京科技大学学报,2011,33(4):444) HCO?浓度较高时电极可维持一定的钝化状态,但 [13]MacDonald DD.The point defect model for the passive state.J Electrochem Soc,1992,139(12):3434 动电位电化学阻抗谱与动电位极化曲线结果显示钝 [14]Macdonald DD,Urquidi-MacDonald M.Theory of steady state 化膜对基体的保护能力降低,其点蚀电位下降,电荷 passive films.J Electrochem Soc,1990,137(8):2395 转移电阻R变小,弥散效应指数n降低,同时维钝 [15]Pagitsas M,Diamantpoulou A,Sazou D.A point defect model for 电位区间变窄,维钝电流密度增大. the general and pitting corrosion on iron oxide electrolyte interface deduced from current oscillations.Chaos Solitons Fractals, 参考文献 2003,17(2/3):263 [16]Pagitsas M,Diamantpoulou A,Sazou D.Distinction between Wang Y,Kang W L,Gao C,et al.Analysis of produced water general and pitting corrosion based on the nonlinear dynamical re from Daqing Oilfield and Nanyang Oilfield.Chin J Spectrose Lab, sponse of passive iron surfaces perturbed chemically by halides. 2011,28(3):997 Electrochem Commun,2001,3(7):330 (王莹,康万利,高超,等.大庆油田和南阳油田采出水的分 [17]Krishnamurthy B,White R E,Ploehn H J.Simplified point de- 析.光谱实验室,2011,28(3):997) fect model for growth of anodic passive films on iron.Electrochim Cheng Y F,Luo J L.Electronic structure and pitting susceptibility 4cta,2002,47(20):3375 of passive film on carbon steel.Electrochim Acta,1999,44(17): 18] El-Naggar MM.Cyclic voltammetric studies of carbon steel in 2947 deaerated NaHCO;solution.J Appl Electrochem,2004,34 (9): B]Nishimura T,Dong J.Corrosion behavior of carbon steel for the 911 overpack in the groundwater containing bicarbonate ions /16th [19]Du C W,Li X G,Chen X,et al.Crevice corrosion behavior of International Conference on Nuclear Engineering Proceedings.New X70 steel in HCO solution under cathodic polarization.Acta York,2008:443 Metall Sin Engl Lett,2008,21(4):235 4]Bai Z Q,Chen C F,Lu M X,et al.Analysis of EIS characteris- 0]Liang P,Li X G,Du C W,et al.Influence of chloride ions on tics of CO2 corrosion of well tube steels with corrosion scales.Appl the corrosion resistance of X80 pipeline steel in NaHCO,solu- Surf Sci,2006,252(20):7578 tion.J Unie Sci Technol Beijing,2008,30(7):735 [5]ShiJJ,Sun W,Geng GQ.Corrosion resistances of passive films (梁平,李晓刚,杜翠薇,等.CI·对X80管线钢在NaHCO4 on low-carbon rebar and fine-grained rebar in alkaline media.Acta 溶液中腐蚀性能的影响.北京科技大学学报,2008,30(7): Metall Sin,2011,47(4):449 735) (施锦杰,孙伟,耿国庆.普通低碳钢与细品粒钢纯化膜在碱 1]Zhou J L,Li X G,Du C W,et al.Passivation process of X80 性介质中的耐蚀性.金属学报,2011,47(4):449) pipeline steel in bicarbonate solutions.Int JMiner Metall Mater, 6]Alves V A,Brett C M A.Characterisation of passive films formed 2011,18(2):178北 京 科 技 大 学 学 报 第 34 卷 能由 Fe3O4向 γ--Fe2O3发生转变[21]. 当溶液中含有 0. 01 mol·L - 1 的 Cl - 时,b—c 和 c—d 段消失,说明 Fe( OH) 2和 Fe( CO3 ) n的生成因 Cl - 的存在受到抑制. 在 e—f 段维钝电流密度降 低,容抗弧半径减小,说明 Cl - 同时也会造成钝化膜 性质的变化和厚度的下降. 在此阶段,V2 + O 会优先 与 Cl - 结合生成 ClO - ,消耗大量的氧空缺位和氧离 子,抑制反应( 6) ~ ( 8) 的发生,从而影响钝化膜的 生成. 其反应方程式如下: V2 + O + Cl →- ClO + . ( 9) 同时,进入过钝化区后,Cl - 的存在使溶液体系 中试样的容抗弧半径迅速下降,说明 Cl - 导致钝化 膜在相对较低的电位下被迅速击穿,其保护性能较 不含 Cl - 的溶液体系有所下降. 3 结论 Cl - 对 N80 钢在HCO - 3 体系的钝化态及稳定性 具有强烈的破坏作用,少量存在即可促使电极由钝 化向活化转变,极大提高了HCO - 3 致钝的临界浓度, 并影响钝化膜的生成. 溶液体系中 Cl - 浓度较低而 HCO - 3 浓度较高时电极可维持一定的钝化状态,但 动电位电化学阻抗谱与动电位极化曲线结果显示钝 化膜对基体的保护能力降低,其点蚀电位下降,电荷 转移电阻 Rct变小,弥散效应指数 n 降低,同时维钝 电位区间变窄,维钝电流密度增大. 参 考 文 献 [1] Wang Y,Kang W L,Gao C,et al. Analysis of produced water from Daqing Oilfield and Nanyang Oilfield. Chin J Spectrosc Lab, 2011,28( 3) : 997 ( 王莹,康万利,高超,等. 大庆油田和南阳油田采出水的分 析. 光谱实验室,2011,28( 3) : 997) [2] Cheng Y F,Luo J L. Electronic structure and pitting susceptibility of passive film on carbon steel. Electrochim Acta,1999,44( 17) : 2947 [3] Nishimura T,Dong J. Corrosion behavior of carbon steel for the overpack in the groundwater containing bicarbonate ions / / 16th International Conference on Nuclear Engineering Proceedings. New York,2008: 443 [4] Bai Z Q,Chen C F,Lu M X,et al. Analysis of EIS characteris￾tics of CO2 corrosion of well tube steels with corrosion scales. Appl Surf Sci,2006,252( 20) : 7578 [5] Shi J J,Sun W,Geng G Q. Corrosion resistances of passive films on low-carbon rebar and fine-grained rebar in alkaline media. Acta Metall Sin,2011,47( 4) : 449 ( 施锦杰,孙伟,耿国庆. 普通低碳钢与细晶粒钢钝化膜在碱 性介质中的耐蚀性. 金属学报,2011,47( 4) : 449) [6] Alves V A,Brett C M A. Characterisation of passive films formed on mild steels in bicarbonate solution by EIS. Electrochim Acta, 2002,47( 13 /14) : 2081 [7] Liu Z Y,Dong C F,Jia Z J,et al. Pitting corrosion of X70 pipe￾line steel in the simulated wet storage environment. Acta Metall Sin,2011,47( 8) : 1009 ( 刘智勇,董超芳,贾志军,等. X70 钢在模拟潮湿存储环境 中的点蚀行为. 金属学报,2011,47( 8) : 1009) [8] Zeng Y M,Luo J L,Norton P R. Initiation and propagation of pit￾ting and crevice corrosion of hydrogen-containing passive films on X70 micro-alloyed steel. Electrochim Acta,2004,49( 5) : 703 [9] Wang Y,Yu H Y,Cheng Y,et al. Corrosion behaviors of X80 pipeline steel in different simulated alkaline soil solution. Adv Ma￾ter Res,2011,189-193: 4261 [10] Orlikowski J,Darowicki K. Investigations of pitting corrosion of magnesium by means of DEIS and acoustic emission. Electrochim Acta,2011,56( 23) : 7880 [11] Ryl J,Darowicki K,Slepski P. Evaluation of cavitation erosion￾corrosion degradation of mild steel by means of dynamic imped￾ance spectroscopy in galvanostatic mode. Corros Sci,2011,53 ( 5) : 1873 [12] Li C T,Cheng X Q,Dong C F,et al. Influence of Cl - on the corrosion electrochemical behavior of alloy 690. J Univ Sci Techn￾ol Beijing,2011,33( 4) : 444 ( 李成涛,程学群,董超芳,等. Cl - 对 690 合金腐蚀电化学 行为的影响. 北京科技大学学报,2011,33( 4) : 444) [13] MacDonald D D. The point defect model for the passive state. J Electrochem Soc,1992,139( 12) : 3434 [14] Macdonald D D,Urquidi-MacDonald M. Theory of steady state passive films. J Electrochem Soc,1990,137( 8) : 2395 [15] Pagitsas M,Diamantpoulou A,Sazou D. A point defect model for the general and pitting corrosion on iron oxide electrolyte interface deduced from current oscillations. Chaos Solitons Fractals, 2003,17( 2 /3) : 263 [16] Pagitsas M,Diamantpoulou A,Sazou D. Distinction between general and pitting corrosion based on the nonlinear dynamical re￾sponse of passive iron surfaces perturbed chemically by halides. Electrochem Commun,2001,3( 7) : 330 [17] Krishnamurthy B,White R E,Ploehn H J. Simplified point de￾fect model for growth of anodic passive films on iron. Electrochim Acta,2002,47( 20) : 3375 [18] El-Naggar M M. Cyclic voltammetric studies of carbon steel in deaerated NaHCO3 solution. J Appl Electrochem,2004,34( 9) : 911 [19] Du C W,Li X G,Chen X,et al. Crevice corrosion behavior of X70 steel in HCO - 3 solution under cathodic polarization. Acta Metall Sin Engl Lett,2008,21( 4) : 235 [20] Liang P,Li X G,Du C W,et al. Influence of chloride ions on the corrosion resistance of X80 pipeline steel in NaHCO3 solu￾tion. J Univ Sci Technol Beijing,2008,30( 7) : 735 ( 梁平,李晓刚,杜翠薇,等. Cl - 对 X80 管线钢在 NaHCO3 溶液中腐蚀性能的影响. 北京科技大学学报,2008,30( 7) : 735) [21] Zhou J L,Li X G,Du C W,et al. Passivation process of X80 pipeline steel in bicarbonate solutions. Int J Miner Metall Mater, 2011,18( 2) : 178 ·1390·
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