N80和3Cr油管钢在CO2驱油环境中的腐蚀行为
Corrosion Behavior of N80 and 3Cr Tubing Steels in CO2 Flooding Environment
摘 要
利用高压釜模拟油田现场CO2驱油环境, 对N80和3Cr两种油管钢进行了CO2腐蚀试验, 通过扫描电镜(SEM)和X射线衍射仪(XRD)分析对比了腐蚀产物膜的腐蚀行为和特征, 并评价了三种缓蚀剂对两种油管钢的缓蚀性能, 计算了腐蚀速率和缓蚀效率, 对比了相应条件下的腐蚀产物膜表面形貌。结果表明,在同一CO2分压条件下, N80和3Cr钢在55 ℃时的腐蚀速率均比在30 ℃时的大, N80钢在30 ℃和55 ℃时的腐蚀速率明显大于3Cr钢, 其抗CO2腐蚀性能满足关系3Cr＞N80; N80腐蚀产物主要由FeCO3和少量CaCO3沉积物组成, 3Cr腐蚀产物主要由FeCO3及少量Cr7C3和Cr2C3组成。
N80和3Cr油管钢
CO2分压
温度
腐蚀产物膜
CO2 corrosion
N80 and 3Cr tubing steel
CO2 partial pressure
temperature
corrosion product film
Abstract
Corrosion behavior and characteristics of 3Cr and N80 pipelines steels and the inhibition efficiencies of three inhibitors were investigated by high pressure autoclave, scanning electron microscopy (SEM) and X ray diffraction (XRD) at various temperatures and CO2 partial pressures in simulated CO2 flooding environment. Corrosion rates and inhibition efficiencies of the samples were calculated and compared, and the surface morphology of corrosion product films was analyzed. The results indicated that, under the same CO2 partial pressure, the corrosion rates of N80 and 3Cr at 55 ℃ were larger than those at 30 ℃, the CO2 corrosion resistance of 3Cr better than that of N80. The main corrosion products were FeCO3 and a little Cr7C3 and Cr2C3.
中图分类号 TG172 DOI 10.11973/fsyfh-201508003
所属栏目 试验研究
基金项目 “863计划”资助项目(2012AA050103); 国家科技支撑计划项目(2012BAC26B00)
收稿日期 2015/4/10
修改稿日期
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备注王珂(1982-),工程师, 硕士, 从事油气田的腐蚀与防腐蚀研究,
引用该论文: WANG Ke,ZHANG Yong-qiang,YIN Zhi-fu,LV Lei,ZHU Shi-dong. Corrosion Behavior of N80 and 3Cr Tubing Steels in CO2 Flooding Environment[J]. Corrosion & Protection, 2015, 36(8): 706
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【3】SIM S, BOCHER F, COLE I S. Investigating the effect of water content in supercritical CO2 as relevant to the corrosion of carbon capture and storage pipelines[J]. Corrosion,2014,70(2): 185-195.
【4】时维才, 钱家煌, 王建华, 等. 江苏油田注CO2强化采油的防腐工艺研究及应用[J]. 腐蚀科学与防护技术, 2003, 15(5): 295-298.
【5】尹志福, 顾菁华, 杨志刚, 等. 模拟CO2驱油环境下温度对J55油管钢腐蚀行为的影响[J]. 腐蚀与防护, 2013, 34(5): 399-406.
【6】FARELAS F,CHOI Y S,NESIC S. Corrosion behavior of deep water oil production tubing material under supercritical CO2 environment: Part 2-effect of crude oil and flow[J]. Corrsion,2014,70(2): 137-145.
【7】BOSCH C,JANSEN J P,POEPPERLING R K. Influence of chromium contents of 0.5% to 1.0% on the corrosion behaviour of low alloy steel for large diameter pipes in CO2 containing aqueous media[C]//Houston: NACE,2003: 118.
【8】王珂, 尹志福, 杨帆, 等. 模拟CO2驱环境下3Cr和20#集输管线钢防腐性能对比[J]. 全面腐蚀控制,2013, 27(7): 45-48.
【9】林冠发, 白真权, 赵国仙, 等. 压力对CO2腐蚀产物膜形貌结构的影响[J]. 中国腐蚀与防腐学报,2004, 24(5): 284-288.
【10】陈长风, 赵国仙, 严密林, 等. 含Cr油管钢CO2腐蚀产物膜特征[J]. 中国腐蚀与防护学报,2002, 22(6): 335-338.
【11】BOKKS A R,CLAYTON C R,DOSS K,et al. On the role of Cr in the passivity of stainless steel[J]. Journal of Electrochemical Society,1986,133(12): 2459-2464.
【12】尹志福, 李辉, 刘立, 等. 模拟CO2驱环境中咪唑啉类缓蚀剂对J55钢腐蚀性能的影响[J]. 腐蚀与防护, 2013, 34(6): 489-492.
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