Abstract：In order to study the corrosion mechanism of Cr5 and Cr7(wt.%) steel under CO2-EOR high temperature and high pressure service condition,the corrosion behavior was simulated by using high temperature and high pressure reactor,and the corrosion rate was measured by weight loss method to compare the corrosion resistance of two test steels. Corrosion products were observed and analyzed by SEM,EDS,XRD and XPS. The corrosion mechanism of test steels under CO2 corrosion conditions was discussed,and an intuitive corrosion mechanism model during the entire corrosion process was constructed. The research results show that the corrosion rate of Cr5 steel is 0.734 75 mm/a,and that of Cr7 steel is 0.217 32 mm/a. Corrosion products are composed of FeCO3 crystals in the outer layer and amorphous FeCO3and Cr(OH)3 in the inner layer. In the initial stage of corrosion,the product film is formed by in-situ generation and gradually deposited after anodic dissolution. After the product completely covers the substrate,the diffusion and deposition of ions at the interface becomes the main way for product film growth.
[1] 彭斯震. 国内外碳捕集、利用与封存(CCUS)项目开展及相关政策发展[J]. 低碳世界,2013(1):18.(PENG Si-zhen. Utilization and storage projects at home and abroad and related policy development[J]. Low Carbon World,2013(1):18.) [2] 潘一,梁景玉,吴芳芳,等. 二氧化碳捕捉与封存技术的研究与展望[J]. 当代化工,2012,41(10):1072. (PAN Yi,LIANG Jing-yu,WU Fang-fang,et al.Research and prospect of the carbon dioxide capture and storage technology[J]. Contemporary Chemical Industry,2012,41(10):1072.) [3] Jacobson,Gretchen A.Pipeline corrosion issues related to carbon capture,transportation,and storage[J]. Materials Performance,2014,53(5):24. [4] 李静,孙冬柏,杨德钧,等. 油管钢高温高压CO2腐蚀行为研究[J]. 钢铁,2001,36(6):48.(LI Jing,SUN Dong-bai,YANG De-jun,et al. Research on CO2 corrosion behavior of tubing steel at high temperature and high pressure[J]. Iron and Steel,2001,36(6): 48.) [5] ZHU S,FU A,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. [6] HUA Y,XU S,WANG Y,et al.The formation of FeCO3 and Fe3O4 on carbon steel and their protective capabilities against CO2corrosion at elevated temperature and pressure[J]. Corrosion Science,2019,157:392. [7] SUI P,SUN J,HUA Y,et al.Effect of temperature and pressure on corrosion behavior of X65 carbon steel in water-saturated CO2transport environments mixed with H2S[J]. Greenhouse Gas Control,2018,73:60. [8] XIANG Y,SONG C C,LI C,et al.Characterization of 13Cr steel corrosion in simulated EOR-CCUS environment with flue gas impurities[J]. Process Safety and Environmental Protection,2020,140:124. [9] HOU B S,ZHANG Q H,LI Y Y,et al.A pyrimidine derivative as a high efficiency inhibitor for the corrosion of carbon steel in oilfield produced water under supercritical CO2conditions[J]. Corrosion Science,2020,164:108334 [10] Okafor P C,Liu X,Zheng Y G.Corrosion inhibition of mild steel by ethylamino imidazoline derivative in CO2-saturated solution[J]. Corrosion Science,2009,51(4):761. [11] 孙建波,柳伟,常炜,等. 低铬X65管线钢CO2腐蚀产物膜的特征及形成机制[J]. 金属学报,2009,45(1):84.(SUN Jian-bo,LIU Wei,CHANG Wei,et al. Characteristics and formation mechanism of CO2 corrosion product film on low chromium X65 pipeline steel[J]. Acta Metallurgica Sinica,2009,45(1):84.) [12] ZHU J Y,XU L N,LU M X,et al.Essential criterion for evaluating the corrosion resistance of 3Cr steel in CO2 environments:Prepassivation[J]. Corrosion Science,2015,93:336. [13] 刘晓玮. 高强度管线钢抗二氧化碳腐蚀研究[D]. 北京:北京科技大学,2011. (LIU Xiao-wei.Research on Carbon Dioxide Corrosion Resistance of High-Strength Pipeline Steel[D]. Beijing:University of Science and Technology Beijing,2011.) [14] 袁睿,顾洋,武会宾,等. 钢板成分及热处理工艺对中Cr钢耐CO2腐蚀性能的影响[J]. 焊管,2018,41(4):13.(YUAN Rui,GU Yang,WU Hui-bin,et al. Effect of steel plate composition and heat treatment process on CO2 corrosion resistance of medium Cr steel[J]. Welded Pipe,2018,41(4):13.) [15] QIN D H,LIU L L,MAO T,et al.Corrosion behavior of 5Cr 0.5Mo steel in sulfur-bearing solution at high temperature[J]. Materialwissenschaft Und Werkstofftechnik,2015,46(9):978. [16] Akiko T,Masayuki S,Takashi D,et al.Role of alloyed molybdenum on corrosion resistance of austenitic Ni-Cr-Mo-Fe alloys in H2 environments[J]. Corrosion Science,2015,98:391. [17] WEI L,GAO K.Understanding the general and localized corrosion mechanisms of Cr-containing steels in supercritical CO2-saturated aqueous environments[J]. Journal of Alloys and Compounds,2019,792:328. [18] Nice P I,Takabe H,Ueda M.The development and implementation of a new alloyed steel for oil and gas production wells[C]//Corrosion/2000,Houston:NACE,2007:154. [19] Dugstad A,Hemmer H,Seiersten M.Fundamental aspects of CO2 metal loss corrosion-part I:Mechanisms[C]//Corrosion/2006,Houston:NACE,2006:111. [20] ZHU J Y,XU L N,LU M X,et al.Interaction effect between Cr(OH)3 passive layer formation and inhibitor adsorption on 3Cr steel surface[J]. RSC Advance,2015(5):18518. [21] 许立宁,王贝,路民旭. 6.5%Cr钢在高温高压CO2环境下的腐蚀行为研究[J]. 金属学报,2016,52(6):672.(XU Li-ning,WANG Bei,LU Min-xu. Research on the corrosion behavior of 6.5% Cr steel under high temperature and high pressure CO2 environment[J]. Acta Metallurgica Sinica,2016,52(6):672.) [22] Muraki T,Nose K,Asahi H.Development of 3% chromium linepipe steel[C]//Corrosion/2003,Houston:NACE,2003:117. [23] 程磊,孙彬,杜重洋. Fe-Cr钢在空气中的氧化行为[J]. 钢铁,2020,55(7):120.(CHENG Lei,SUN Bin,DU Chong-yang. Oxidation behavior of Fe-Cr steel in air[J]. Iron and Steel,2020,55(7):120.) [24] Linter B R,Burstein G T.Reactions of pipeline steels in carbon dioxide solutions[J]. Corrosion Science,1999,41(1):117. [25] Gulbrandsen E,Nesic S,Stangeland A.Effect of precorrosion on the performance of inhibitors for CO2 corrosion of carbon steel[C]//Corrosion/1998,Houston:NACE,1998:13. [26] 付贵勤,李东亮,朱苗勇. SO2对海洋大气环境中含铬耐候钢腐蚀行为的影响[J]. 钢铁,2018,53(12):94.(FU Gui-qin,LI Dong-liang,ZHU Miao-yong. Effect of SO2 on corrosion behavior of Cr-containing weathering steel in simulated marine atmosphere[J]. Iron and Steel,2018,53(12):94.) [27] CHEN C F,LU M X,SUN D B,et al.Effect of chromium on the pitting resistance of oil tube steel in a carbon dioxide corrosion system[J]. Corrosion,2005,61(6):594. [28] NIU G,CHEN Y,WU H.Corrosion behavior of high-strength spring steel for high-speed railway[J]. International Journal of Minerals,2018,25(5):527. [29] Takabe H,Ueda M,Stangeland A.Corrosion resistance of low Cr bearing steel in sweet and sour environments[C]//Corrosion/2002,Houston:NACE,2002:41. [30] 陈长风,赵国仙,严密林,等. 含Cr油套管钢CO2腐蚀产物膜特征[J]. 中国腐蚀与防护学报,2002,22(6):336.(CHEN Chang-feng,ZHAO Guo-xian,YAN Mi-lin,et al. Film characteristics of CO2 corrosion products of Cr-containing casing steel[J]. Journal of Chinese Society for Corrosion and Protection,2002,22(6):336.)
2021, Vol. 56 
