目的 探究不同温度下H2S/CO2腐蚀产物膜对T95钢腐蚀行为的影响.方法 将T95油管钢切割成15 mm×10 mm×3 mm的规格,表面经抛光打磨后,利用千分尺测量具体尺寸,用AR2140电子天平称量.试片分别垂直置于上支架与下支架,下支架平稳放入釜底,而后加入模拟地层水,确保实验介质浸没下支架试样而不与上部挂片试样接触.在气密性良好的基础上连续2h通入N2除氧,而后顺序通入H2S、CO2和N2,并升温升压至实验要求.72 h后将试样从气、液相中取出,分别取样采用电子显微镜观察腐蚀产物膜的微观形态,并利用X射线能谱仪分析腐蚀产物膜的成分,并计算去除腐蚀产物后试样在气相/液相中的腐蚀速率.结果 T95试件在H2S/CO2的液相环境中的腐蚀速率整体比气相环境大,这可能是因为液相腐蚀产物膜较气相腐蚀产物膜疏松.温度对H2S/CO2腐蚀产物膜的形成具有重要影响,随着温度的升高,H2S/CO2腐蚀产物膜逐渐变厚,但成膜效果变差,高温下的腐蚀产物膜具有一定保护作用而使得腐蚀速率增大的幅度变缓.T95钢腐蚀产物膜的主要成分是FexSy系列化合物和FeCO3,同时还形成Cr(OH)3和Cr2O3非晶态产物,这些产物起到了阻隔阴离子穿透腐蚀产物膜的作用,使与金属基体界面接触的阴离子溶度降低,抑制了金属基体的阳极反应而减小腐蚀速率.而形成的腐蚀产物膜,造成界面反应的时间常数和Rt值明显增大,一定程度上阻碍腐蚀的继续发展.结论 温度对H2S/CO2腐蚀产物膜的形成具有重要影响,H2S/CO2腐蚀产物膜随着温度的升高逐渐变厚,但成膜效果变差,温度大于120℃时,腐蚀产物膜具有一定的保护作用而使得腐蚀速率增大的幅度变缓.
参考文献
| [1] | J.L.Crolet;M.R.Bonis.How to pressurize autoclaves for corrosion testing under carbon dioxide and hydrogen sulfide pressure[J].Corrosion: The Journal of Science and Engineering,20002(2):167-182. |
| [2] | A. N. Kuzyukov;Yu. Ya. Nikhayenko;V. A. Levchenko.How hydrogen affects operability of chemical and petrochemical equipment made of carbon and low alloy steel[J].International journal of hydrogen energy,20027/8(7/8):813-817. |
| [3] | R. A. Siddiqui;Hussein A. Abdullah.Hydrogen embrittlement in 0.31% carbon steel used for petrochemical applications[J].Journal of Materials Processing Technology,20051/2(1/2):430-435. |
| [4] | 李春福;王斌;张颖;罗平亚.油气田开发中CO2腐蚀研究进展[J].西南石油学院学报,2004(2):42-46. |
| [5] | 王丹;袁世娇;吴小卫;谢飞;赵启慧;杨帆;程贵鑫.油气管道CO2/H2 S腐蚀及防护技术研究进展[J].表面技术,2016(3):31-37. |
| [6] | 冯星安;黄柏宗;高光第.对四川罗家寨气田高含CO2、H2S腐蚀的分析及防腐设计初探[J].石油工程建设,2004(1):10-14. |
| [7] | The effect of H_2S concentration on the corrosion behavior of carbon steel at 90 ℃[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,20106(6):p.2050. |
| [8] | W. Sun;S. Nesic.A Mechanistic Model of Uniform Hydrogen Sulfide/ Carbon Dioxide Corrosion of Mild Steel[J].Corrosion: The Journal of Science and Engineering,20095(5):291-307. |
| [9] | 王斌;周小虎;李春福;李福德;钟水清.钻井完井高温高压H2S/CO2共存条件下套管、油管腐蚀研究[J].天然气工业,2007(2):67-69. |
| [10] | 张明友;姜学海;赵国仙;窦益华.H2S/CO2共存条件下油井管材及工具腐蚀试验研究[J].石油机械,2007(9):4-6,45. |
| [11] | Zafar, Muhammad Nauman;Rihan, Rihan;Al-Hadhrami, Luai.Evaluation of the corrosion resistance of SA-543 and X65 steels in emulsions containing H2S and CO2 using a novel emulsion flow loop[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2015May(May):275-287. |
| [12] | Zhao, Jingmao;Duan, Hanbing;Jiang, Ruijing.Synergistic corrosion inhibition effect of quinoline quaternary ammonium salt and Gemini surfactant in H2S and CO2 saturated brine solution[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2015Feb.(Feb.):108-119. |
| [13] | Z. F. Yin;W. Z. Zhao;Z. Q. Bai;Y. R. Feng;W. J. Zhou.Corrosion behavior of SM 80SS tube steel in stimulant solution containing H{sub}2S and CO{sub}2[J].Electrochimica Acta,200810(10):3690-3700. |
| [14] | Corrosion of stainless steel 316L in simulated formation water environment with CO_2-H_2S-Cl~-[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,200912(12):2811. |
| [15] | Li, Y;van Santen, RA;Weber, T.High-temperature FeS-FeS2 solid-state transitions: Reactions of solid mackinawite with gaseous H2S[J].Journal of Solid State Chemistry,200811(11):3151-3162. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%