超临界CO2输送环境中O2、SO2和NO2杂质对X52钢腐蚀行为的影响
Effect of O2, SO2 and NO2 Impurities on Corrosion Behavior of X52 Steel in Supercritical CO2 Transport Environments
摘 要
通过腐蚀模拟试验、表面分析技术水化学模拟计算等方法，对比了在含O2、SO2或NO2杂质超临界CO2-H2O环境中X52钢的腐蚀行为差异，探讨了杂质及其交互作用对X52钢腐蚀的影响机理。结果表明：在含0.02%（体积分数） O2的超临界CO2-H2O环境中X52钢的腐蚀速率仅为0.007 mm/a，而在含0.02% SO2或0.02% NO2环境中X52钢的腐蚀速率均高于0.300 mm/a；当O2与SO2或NO2共存时，二者交互作用促进腐蚀性物质H2SO4或HNO3形成，进而促进X52钢的腐蚀速率提升；在含不同杂质的超临界CO2-H2O环境中X52钢的腐蚀和成膜反应过程主要由杂质控制，X52钢腐蚀程度不同的原因在于杂质及其反应产物对液相析出量及液相化学环境的影响程度存在差异。
超临界CO2
杂质
腐蚀产物
腐蚀机理
X52 steel
supercritical CO2
impurity
corrosion product
corrosion mechanism
Abstract
The differences in corrosion behavior of X52 steel exposed to supercritical CO2-H2O environments with the impurities of O2, SO2 or NO2 were compared by combining the methods of corrosion test, surface analysis technology and water chemistry simulation calculation. The influence mechanism of various impurities and their interaction on the corrosion of the steel were discussed. The results showed that the corrosion rate of X52 steel was only 0. 007 mm/a in supercritical CO2-H2O environment containing 0. 02% (volumn fraction) O2, while the rate of X52 steel was higher than 0. 300 mm/a in the environment containing 0. 02% SO2 or 0. 02% NO2. The interaction between O2 and SO2 or O2 and NO2 promoted the formation of corrosive substance of H2SO4 or HNO3, thus leading to a significant synergistic effect on the enhancement of corrosion rate. The corrosion and film formation processes of X52 steel were mainly controlled by the impurities in supercritical CO2-H2O environments. The different influences of the impurities and their reaction products on the precipitation amount as well as chemical environment of aqueous phase resulted in the disparities in the corrosion degree of X52 steel.
中图分类号 TG172 DOI 10.11973/fsyfh-202312009
所属栏目 试验研究
基金项目 中国石油天然气股份有限公司科学研究与技术开发项目（2021ZZ01-02）；中央高校基本科研业务费专项资金（20CX06075A）
收稿日期 2023/3/31
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引用该论文: LI Zhengmin,NIU Weiqian,ZHAO Yulong,XU Yanlei,LIU Yanxiang,GUO Fangfang,SUN Chong. Effect of O2, SO2 and NO2 Impurities on Corrosion Behavior of X52 Steel in Supercritical CO2 Transport Environments[J]. Corrosion & Protection, 2023, 44(12): 60
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参考文献
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【3】SIM S, COLE I S, BOCHER F, et al.Investigating the effect of salt and acid impurities in supercritical CO2 as relevant to the corrosion of carbon capture and storage pipelines[J].International Journal of Greenhouse Gas Control, 2013, 17:534-541.
【4】DE VISSER E, HENDRIKS C, BARRIO M, et al.Dynamis CO2 quality recommendations[J].International Journal of Greenhouse Gas Control, 2008, 2(4):478-484.
【5】SONKE J, BOS W M, PATERSON S J.Materials challenges with CO2 transport and injection for carbon capture and storage[J].International Journal of Greenhouse Gas Control, 2022, 114:103601.
【6】MORLAND B H, DUGSTAD A, SVENNINGSEN G.Experimental based CO2 transport specification ensuring material integrity[J].International Journal of Greenhouse Gas Control, 2022, 119:103697.
【7】CHOI Y S, NESIC S, YOUNG D.Effect of impurities on the corrosion behavior of CO2 transmission pipeline steel in supercritical CO2-water environments[J].Environmental Science & Technology, 2010, 44(23):9233-9238.
【8】XIANG Y, WANG Z, XU C, et al.Impact of SO2 concentration on the corrosion rate of X70 steel and iron in water-saturated supercritical CO2 mixed with SO2[J].The Journal of Supercritical Fluids, 2011, 58(2):286-294.
【9】HUA Y, BARKER R, NEVILLE A.The influence of SO2 on the tolerable water content to avoid pipeline corrosion during the transportation of supercritical CO2[J].International Journal of Greenhouse Gas Control, 2015, 37:412-423.
【10】HUA Y, JONNALAGADDA R, ZHANG L, et al.Assessment of general and localized corrosion behavior of X65 and 13Cr steels in water-saturated supercritical CO2 environments with SO2/O2[J].International Journal of Greenhouse Gas Control, 2017, 64:126-136.
【11】BROWN J, GRAVER B, GULBRANDSEN E, et al.Update of DNV recommended practice RP-J202 with focus on CO2 corrosion with impurities[J].Energy Procedia, 2014, 63:2432-2441.
【12】SUN C, WANG Y, SUN J B, et al.Effect of impurity on the corrosion behavior of X65 steel in water-saturated supercritical CO2 system[J].The Journal of Supercritical Fluids, 2016, 116:70-82.
【13】MORLAND B H, NORBY T, TJELTA M, et al.Effect of SO2, O2, NO2, and H2O concentrations on chemical reactions and corrosion of carbon steel in dense phase CO2[J].Corrosion, 2019, 75(11):1327-1338.
【14】DUGSTAD A, HALSEID M, MORLAND B.Effect of SO2 and NO2 on corrosion and solid formation in dense phase CO2 pipelines[J].Energy Procedia, 2013, 37:2877-2887.
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【16】HUA Y, BARKER R, NEVILLE A.The effect of O2 content on the corrosion behaviour of X65 and 5Cr in water-containing supercritical CO2 environments[J].Applied Surface Science, 2015, 356:499-511.
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【21】XIANG Y, LI C, HESITAO W, et al.Understanding the pitting corrosion mechanism of pipeline steel in an impure supercritical CO2 environment[J].The Journal of Supercritical Fluids, 2018, 138:132-142.
【22】SUN C, YAN X L, SUN J B, et al.Unraveling the effect of O2, NO2 and SO2 impurities on the stress corrosion behavior of X65 steel in water-saturated supercritical CO2 streams[J].Corrosion Science, 2022, 209:110729.
【23】孙冲. 杂质对超临界CO2输送管线X65钢腐蚀的影响研究[D].东营:中国石油大学(华东), 2016.
【24】DUGSTAD A, HALSEID M, MORLAND B H.Experimental techniques used for corrosion testing in dense phase CO2 with flue gas impurities[C]//CORROSION 2014.Houston, Texas:NACE, 2014.
【25】DUGSTAD A, HALSEID M, MORLAND B.Testing of CO2 specifications with respect to corrosion and bulk phase reactions[J].Energy Procedia, 2014, 63:2547-2556.
【26】杨壮春, 蔡伊扬, 朱烨森, 等.介质条件对X65管线钢及其焊接接头CO2腐蚀的影响[J].腐蚀与防护, 2019, 40(10):717-722, 752.
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