模拟油气田环境,采用高温高压釜对油套管N80钢进行失重腐蚀试验.结果表明:N80钢的腐蚀速率随着乙酸浓度的增加呈升高趋势,但在乙酸浓度为3000μl/L时反而比在1000 μl/L时低,并且其在含乙酸的腐蚀介质中的腐蚀速率远高于在未含乙酸的腐蚀介质中的腐蚀速率.利用扫描电子显微镜(SEM)、能散X射线谱仪(EDS)和X射线衍射技术(XRD)研究了在不同乙酸浓度条件下油管钢N80腐蚀的特征并讨论了其腐蚀机理.
The corrosion perfromance of annulus N80 steel was examined in a simulated oil and gas field environment with acetic acid in an autoclave, and the corrosion rate was measured by weight loss method. The results showed that the corrosion rate of N80 increased with the increasing of acetic acid concentration, but the corrosion rate of N80 steel was lower with 3000 μl/L than that with 1000 μl/L of acetic acid concentration, and the corrosion rate of N80 steel was much higher in the corrosion mediun with acetic acid than that without acetic acid. Scanning Electron Microscope (SEM), X Ray Diffractometers (XRD) and Energy Dispersive x-ray Spectra (EDS)were used to characterize the corrosion features of annulus N80 steel with different concentation of acetic acid. The corrosion mechanism in the presence of acetic acid in oil was also discussed.
参考文献
| [1] | 久松敬弘.有机溶剂の腐食[J].铁と钢,1977,63:574. |
| [2] | 高延敏,徐永祥,吴维.有机溶剂的腐蚀研究进展[J].腐蚀科学与防护技术,2002,14(5):280. |
| [3] | 高延敏,王文,徐永祥,等.有机酸对A3钢腐蚀的影响[J].腐蚀科学与防护技术,2002,14(6):326. |
| [4] | 蒲亮,缪强,张志炳,等.醋酸水溶液汽液非接触相平衡的蒙特卡罗模拟研究[J].计算机与应用化学,2008,25(2):185. |
| [5] | 高延敏,王绍明,徐永祥,等.A3钢在乙酸中的腐蚀行为和机理[J].腐蚀与防护,2006,27(1):11. |
| [6] | Crolet J L,Thevenot N,Dugstad A.Role of free acetic acid on the CO_2 corrosion of steels[J].Corrosin/1999,Houston:NACE Paper No.24. |
| [7] | George K,Wang S H.Modeling of CO_2 corrosion of mild steel at high pressures of CO_2 and in the presence of acetic acid[J].Conrrosion/2004,Houston:NACE Paper No.04623. |
| [8] | George K,Nesic S.Elestrochenical Investigation and Modeling of Carbon Dioxide Corrosion of Carbon dteel in the Presence of Acetic Acid[J].Gorrosion/2004,Houston:NACE Paper No.04379. |
| [9] | 查全性.电极过程动力学导论[M].北京:科技出版社,2005.168. |
| [10] | Wang S H,George K,NesieS.High pressure CO_2 corrosion electrochemistry and the effect of acetic acid[J].Corrosion/2004,Houston:NACE Paper No.04375. |
| [11] | Ciszkowska M,Stojek Z,Morris S E,et al,Steady state voltammetry of strong and weak acids with and without supporting electrolyte[J].Analytical Chemistry,1992,64:2372. |
| [12] | daniele S,Lavagnini l,Baldo M A,et al.Steady state voltammetry at microelectrodes for the H_2 eveolution from strong and weak acids under pseudo-first and second order kinetie conditions[J].Electroanalytical Chemistry,1996,404:105. |
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