Stability of corrosion inhibitor film of high sulfur gas gathering pipeline

doi:10.11949/j.issn.0438-1157.20141825

Abstract

Abstract:

Aiming at the stability problem of corrosion inhibitor film of the high sulfur gas gathering pipelines with two-phase turbulent flow, the corrosion inhibitor film stability with typical pipe flow in high sour gas field was evaluated by using the dynamic corrosion test system with high temperature and high pressure cyclic reactor. The inhibitor prefilm stability was better when the flow velocity was below 6 m·s^-1 and it began partial failure when the flow rate exceeded 7.5 m·s^-1, while it was completely failure under the action of flow shear force when the flow rate reached 9 m·s^-1. The fluid dynamics study showed that the shear stress of 6.5 N·m^-2 was the critical point of the inhibitor film being overall damaged.

Key words: multiphase flow, turbulent flow, corrosion, inhibitor film, instability, shear stress

摘要：

针对高含硫气田集输净化系统两相湍流流动条件下缓蚀剂预膜稳定性问题,利用高温高压动态循环腐蚀反应釜实验系统,开展高含硫气田典型管流流动条件下缓蚀剂膜稳定性评价研究:当流速在6 m·s^-1以下时,缓蚀剂预膜稳定性较好;当流速超过7.5 m·s^-1后,缓蚀剂预膜开始出现局部破坏;当流速达9 m·s^-1时,缓蚀剂膜在较高的流动剪切应力作用下已完全失效。流体动力学研究表明剪切应力为6.5 N·m^-2时为缓蚀剂膜发生整体破坏的临界点。

关键词: 多相流, 湍流, 腐蚀, 缓蚀剂膜, 不稳定性, 剪切应力

CLC Number:

TG174.1

CHEN Siwei, LIU Dexu, GONG Jinhai. Stability of corrosion inhibitor film of high sulfur gas gathering pipeline[J]. CIESC Journal, 2015, 66(7): 2607-2612.

陈思维, 刘德绪, 龚金海. 高含硫气田集输净化管道缓蚀剂预膜稳定性[J]. 化工学报, 2015, 66(7): 2607-2612.

References 21

[1]	Bill H, Kip S, Timothy B. A review of monitoring and inspection techniques for CO2 & H2S corrosion in oil & gas production facilities [J]. Corrosion, 2006, 36 (2): 35-39.
[2]	Feng Xing'an (冯星安), Huang Baizong (黄柏宗). Preliminary corrosion analysis and anti design of Sichuan Luojiazhai gas field with high CO2/H2S content [J]. Petroleum Engineering Construction (石油工程建设), 2004, 30 (1): 10-14.
[3]	Abboud Y, Abourriche A. 2,3-Quinoxalinedione as a novel corrosion inhibitor for mild steel in 1 M HCl [J].Materials Chemistry and Physics, 2007, 105 (3) :1-5.
[4]	Amin M A, Chhatre S. The inhibition of low carbon steel corrosion in hydrochloric acid solution by succini acid (Ⅰ): Weight loss, polarization, EIS, PZC, EDX and SEM studies [J]. Electrochimica Acta, 2007, 52 (4): 3588-3600.
[5]	Mu G N, Li X H. Inhibition of cold rolled steel corrosion by Tween-20 in sulfuric acid: weight loss, electrochemical and AFM approaches [J]. Journal of Colloid and Interface Science, 2005, 89 (8): 184-192.
[6]	Hegazy M A, Badawi A M, Abd El Rehim S S, et al. Corrosion inhibition of carbon steel using novel N- (2- (2-mercaptoacetoxy)ethyl)-N, N-dimethyl dodecan-l-aminium bromide during acid pickling [J]. Corrosion Science, 2013, 69: 110-122.
[7]	Deng S D, Li X H. Inhibition by Jasminum nudiflorum Lindl. leaves extract of the corrosion of aluminum in HCl solution [J]. Corrosion Science, 2012, 64: 253-262.
[8]	Li X H, Deng S D, Fu H. Inhibition by tetradecylpyridinium bromide of the corrosion of aluminium in hydrochloric acid solution [J]. Corrosion Science, 2011, 53 (9): 1529-1536.
[9]	Satapathy A K. Corrosion inhibition by Justicia gendarussa plant extract in hydrochloric acid solution [J]. Corrosion Science, 2009, 51 (12): 2848-2856.
[10]	Yao S Z, Jiang X H, Zhou L M. Corrosion inhibition of iron in 20% hydrochloric acid by 1,4/1,6 bis (α-octylpyridinium) butane /hexane dibromide [J]. Materials Chemistry and Physics, 2007, 104 (2/3): 301-305.
[11]	Qu Q, Jiang S, Bai W, Li L. Effect of ethylenediamine letraacetic acid disodium on the corrosion of cold rolled steel in the presence of benzotriazole in hydrochloric acid [J]. Electrochimica Acta, 2007, 52 (2): 6811-6820.
[12]	Behpour M, Mohammadi N. Investigation of inhibition properties of aromatic thiol self assembled monolayer for corrosion protection [J].Corrosion Science, 2012, 65 (5): 331-339.
[13]	Flitt H J, Schweinsberg D P. Evaluation of corrosion rate from polarization curves not exhibiting a Tafel region [J]. Corrosion Science, 2005, 47 (12): 3034-3052.
[14]	Lowmunkhon P, Ungthararak D, Sutthivaiyakit P. Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution [J]. Corrosion Science, 2010, 52: 30-36.
[15]	Jeyaprabha C, Sathiyanarayanan S, Venkatachari G. Effect of cerium ions on corrosion inhibition of PANI for iron in 0.5 M H2SO4 [J]. Applied Surface Science, 2006, 253 (2): 432-438.
[16]	Bouklah M, Ouassini A, Harnmouti B, El Ldrissi A. Corrosion inhibition of steel in sulphuric acid by pyrrolidine derivatives [J]. Applied Surface Science, 2006, 252 (6): 2178-2185.
[17]	Garcia S J, Markley A, Mot J M C, Elughes A E. Unraveling the corrosion inhibition mechanisms of bi-functional inhibitors by EIS and SEM-EDS [J]. Corrosion Science, 2013, 69 (7): 346-358.
[18]	Schmitt G. Drag reduction by corrosion inhibitors—a neglected option for mitigation of flow induced localized corrosion [J]. Materials and Corrosion, 2001, 52: 329-343.
[19]	Kong Fanqun (孔凡群), Wang Shouping (王寿平), Zeng Daqian (曾大乾). Development key technology of Puguang gas field with high content of H2S, CO2 [J].The Natural Gas Industry (天然气工业), 2011, 31 (3): 1-4.
[20]	He Shenghou (何生厚). Development technical problems and countermeasures of Puguang gas field with high content of H2S, CO2 [J]. The Natural Gas Industry (天然气工业), 2008, 28 (4): 82-85.
[21]	Nesic S, Nordsveen M, Nyborg R, Stangeland A. A mechanistic model for CO2 corrosion with protective iron carbonate films [J]. Corrosion, 2009, 39 (6): 21-22.