2Cr13不锈钢在含乙酸的CO2饱和的NaCl溶液中的腐蚀行为
Corrosion Behaviour of 2Cr13 Stainless Steel in CO2-saturated NaCl Solution in Presence of Acetic Acid
摘 要
采用极化曲线、电化学阻抗谱等电化学测试方法, 和扫描电镜(SEM)、X射线能谱(EDS)、X射线衍射(XRD)等物理检测方法, 研究了乙酸(HAc)对2Cr13不锈钢在60 ℃下CO2饱和的3% NaCl溶液中腐蚀行为的影响, 并讨论了腐蚀机理。研究表明, HAc能够直接在电极表面还原, 并能促进腐蚀产物FeCO3的形成和溶解, HAc的存在同时加速了金属上的阴极反应和阳极反应, 极大促进了2Cr13不锈钢的局部腐蚀和全面腐蚀的发生。
乙酸(HAc)
CO2饱和
腐蚀行为
2Cr13 stainless steel
acetic acid
CO2-saturated
corrosion behavior
Abstract
The effect of acetic acid on corrosion behaviour of 2Cr13 stainless steel in CO2-saturated 3% NaCl solution at 60 ℃ was investigated by using polarization curves, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). Corrosion mechanism was discussed. With the addition of acetic acid in the solution, both cathodic and anodic reaction rates increase remarkably. It is attributed to the fact that acetic acid adsorbed on electrode surface can be reduced directly by electrochemical reaction, and facilitate the formation and dissolution of ferrous carbonate due to the decrease of solution pH. Acetic acid enhances both localized corrosion and general corrosion attack on 2Cr13 stainless steel.
中图分类号 TG172
所属栏目 试验研究
基金项目
收稿日期 2012/1/12
修改稿日期
网络出版日期
作者单位点击查看
联系人作者彭乔(pq708@163.com)
备注彭乔, 副教授, 博士,
引用该论文: CHEN Wei,PENG Qiao. Corrosion Behaviour of 2Cr13 Stainless Steel in CO2-saturated NaCl Solution in Presence of Acetic Acid[J]. Corrosion & Protection, 2012, 33(12): 1076
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参考文献
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【3】Guo X P, Tomoe Y. The cathodic reactions in CO2-saturated DGA solution[C]//45th Symposium of Materials and Environment. Jpn Soc Corros Eng, 1998, D-107.
【4】Okafor P C, Brown B.Nesic S. CO2 corrosion of carbon steel in the presence of acetic acid at higher temperatures[J]. Electrochem, 2009, 39(8):877-880.
【5】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.
【6】朱世东, 魏建锋, 尹志福, 等. 油套管N80钢的乙酸腐蚀行为[J]. 腐蚀科学与防护技术, 2010, 22(2):97-100.
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【8】曹楚南, 张鉴清. 电化学阻抗谱导论[M]. 北京:科学出版社, 2002.
【9】Zhang H, Zhao Y L, Jiang Z D. Effects of temperature on the corrosion behavior of 13Cr martensitic stainless steel during exposure to CO2 and Cl- environment[J]. Materials Letters, 2005, 59(27):3370-3374.
【10】Zhang G A, Cheng Y F.Corrosion of X65 steel in CO2-saturated oilfield formation water in the absence and presence of acetic acid[J]. Corrosion Science, 2009, 51(8):1589-1595.
【11】Mehdi Honarvar Nazari, Saeed Reza Allahkaram. The effcct of acetic acid on the CO2 corrosion of grade X70 steel[J]. Materials and Design, 2010, 31(9):4290-4295.
【12】Zhu S D, Fu A Q, Miao J, et al. Corrosion of N80 carbon steel in oil field formation water containing CO2 in the absence and presence of acetic acid[J]. Corrosion Science, 2011, 53(10):3156-3165.
【13】Srdjan Nesic. Key issues related to modelling of internal corrosion of oil and gas pipelines-A review[J]. Corrosion Science, 2007, 49(12):4308-4338.
【14】Takabe H, Ueda M. Corrosion resistance of low Cr bearing steel in sweet and sour environments[C]//The 57th NACE Annual Conference. Houston:Omnipress, 2002.
【15】王献昉. 铬钢在模拟油田CO2腐蚀中的点蚀行为[J]. 材料保护, 2003, 36(7):28-31.
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