Effects of Sulfur-Containing Crude Oil on Top-of-Line Corrosion Behavior of 16Mn Pipeline Steel
摘 要
采用含硫原油腐蚀试验箱模拟输油管道顶部腐蚀环境,研究了16Mn管线钢在含硫原油中不同温度和不同时间条件下的顶部腐蚀行为。采用扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射(XRD)等分析手段观察16Mn管线钢的腐蚀形貌、分析其表面腐蚀产物膜的成分,同时结合失重法计算得到试样的腐蚀速率。结果表明:16Mn管线钢的腐蚀速率随含硫原油温度升高逐渐增大,当温度超过60℃时,腐蚀产物膜形成,腐蚀产物膜可以阻隔钢基体与腐蚀介质的直接接触,从而减缓腐蚀进程,腐蚀速率停止上升并出现缓慢下降的趋势;在相同的腐蚀温度下,初期腐蚀速率较快,随着腐蚀时间的延长,致密的腐蚀产物膜逐渐在16Mn管线钢表面形成,有利于抑制顶部腐蚀进程,使腐蚀速率逐渐减小。
Abstract
The corrosion environment at the top of oil pipeline was simulated by a sulfur-containing crude oil corrosion test chamber, and the top-of-line corrosion behavior of 16Mn pipeline steel was studied in the sulfur-containing crude oil under different conditions of temperature and time. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were used to observe the corrosion morphology of the 16Mn pipeline steel and to analyze the composition of the corrosion product film on the steel surface. The corrosion rate of the 16Mn pipeline steel sample was calculated by weight loss method. The results show that the corrosion rate of the 16Mn pipeline steel increased with the increase of temperature of sulfur-containing crude oil. When the temperature was over 60℃, the corrosion product film formed, which can block the contact between steel base and corrosive medium and then slow down the corrosion process, so the corrosion rate stopped rising with a tendency of slow decline. At the same corrosion temperature, the initial corrosion rate was fast. As the corrosion time prolonged, a dense corrosion product film gradually formed on the surface of 16Mn pipeline steel, which was beneficial to suppress the top-of-line corrosion process and gradually reduced the corrosion rate.
中图分类号 TG172 DOI 10.11973/fsyfh-201908003
所属栏目 试验研究
基金项目 国家自然科学基金(51671037);江苏高校"青蓝工程"(苏教师[2018]12号)
收稿日期 2019/3/19
修改稿日期
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引用该论文: XIAO Wenwen,XU Yanyan,GAO Duolong,GE Pengli,ZENG Wenguang,PENG Haoping. Effects of Sulfur-Containing Crude Oil on Top-of-Line Corrosion Behavior of 16Mn Pipeline Steel[J]. Corrosion & Protection, 2019, 40(8): 561
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【3】MUHLBAUER W K. Pipeline risk management manual:ideas, techniques, and resources. 3rd ed. Oxford:Gulf Professional Publishing, 2004.
【4】KOBAYASHI K,MIZUNO D,HARA T, et al. Effects of balance gas on sour corrosion and HIC behavior of carbon steel//NACE-International Corrosion Conference Series 2015. Houston:NACE International, 2015.
【5】KOBAYASHI K,OMURA T,ASAHI H, et al. HLP's study on HIC evaluation method in mildly sour environments for high strength line pipe steel//NACE-International Corrosion Conference Series 2012.Houston:NACE International, 2012.
【6】AJAYI F, LYON S. Detrimental effects of acetic acid on corrosion of carbon steel pipelines transporting wet gas//SPE Nigeria Annual International Conference and Exhibition Lagos. Lagos, Nigeria:Society of Petroleum Engineers, 2013.
【7】宋灵君,王华良,孙铭艺,等.原油含硫含水量和流速对输油管道腐蚀行为的影响及措施.化工设计通讯,2016,42(5):30-31.
【8】HERNÁNDEZ GAYOSSO M J, NAVA N, ZAVALA OLIVARES G. Characterisation and comparison of corrosion products originated in steel pipelines transporting sour gas and crude oil. Corrosion Engineering, Science and Technology, 2016, 51(8):626-634.
【9】张伟刚,赵会军,张璇,等.X80管线钢在含硫原油中的顶部腐蚀行为.腐蚀与防护,2016,37(8):623-626.
【10】魏彦方,彭浩平,刘军,等.含硫原油对不同管材顶部腐蚀行为的影响.油气田地面工程,2017,36(2):81-85.
【11】IVONYE I. Corrosion study of carbon steel in the presence of MEG and corrosion inhibitors in acid//NACE-International Corrosion Conference Series 2013. Houston:NACE International, 2013.
【12】吴考民,王可中,石鑫,等.含硫原油对输油管道的腐蚀性.油气储运,2010,29(8):616-618.
【13】IVONYE I,NEVILLE A,WANG C. The corrosion of carbon steel in the presence of monoethylene glycol (MEG)-assessing the influence of an iron carbonate scale//NACE-International Corrosion Conference Series 2015. Houston:NACE International, 2015.
【14】SU X, YIN Z X, CHENG Y F. Corrosion of 16mn line pipe steel in a simulated soil solution and the implication on its long-term corrosion behavior. Journal of Materials Engineering and Performance, 2013, 22(2):498-504.
【15】郝文魁,刘智勇,马岩,等.不同pH的碱性环境中16Mn钢及热影响区应力腐蚀行为.材料工程,2015,43(3):28-34.
【16】OLSEN S,HALVORSEN A M K, Corrosion control by pH stabilization//NACE-International Corrosion Conference Series 2015. Houston:NACE International, 2015.
【17】LIANG W E I,PANG X,KEWEI G A O. Effects of crude oil on the corrosion behavior of pipeline steel under wet CO2 conditions. Materials Performance, 2015, 54(5):58-62.
【18】张玉楠,许立宁,杨阳,等.X70管线钢CO2湿气顶部的腐蚀行为.腐蚀与防护,2015,36(1):1-5,67.
【19】郭少强,朱海山,柳歆,等.油气输送管线顶部CO2腐蚀预测模型.腐蚀与防护,2014,35(5):469-472.
【20】PUGH D V. Top-of-line corrosion mechanisms for sour wet gas pipelines//NACE-International Corrosion Conference Series 2009. Houston:NACE International, 2009.
【21】GAO K W,YU F,PANG X L, et al. Mechanical properties of CO2 corrosion product scales and their relationship to corrosion rates. Corrosion Science, 2008, 50(10):2796-2803.
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【23】ZHENG Y G, NING J, BROWN B, et al. Electrochemical model of mild steel corrosion in a mixed H2S/CO2 Aqueous environment in the absence of protective corrosion product layers. Corrosion, 2015, 71(3):316-325.
【24】MA H Y, CHENG X L, LI G Q, et al. The influence of hydrogen sulfide on corrosion of iron under different conditions. Corrosion Science, 2000, 42(10):1669-1683.
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