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材料导报  2022, Vol. 36 Issue (24): 21110057-6    https://doi.org/10.11896/cldb.21110057
  金属与金属基复合材料 |
气相压力对CO2/H2O气液两相泡状流中20#钢初期腐蚀行为的影响
杨贵荣1,*, 宋文明2, 潘照霞1, 马颖1, 郝远1
1 兰州理工大学有色金属先进加工与再利用国家重点实验室,兰州 730050
2 甘肃蓝科石化高新装备股份有限公司,兰州 730070
Effect of CO2 Pressure on Initial Corrosion Behavior of 20# Steel Under the Gas-Liquid (CO2/Aqueous Solution) Two-phases Bubble Flow
YANG Guirong1,*, SONG Wenming2, PAN Zhaoxia1, MA Ying1, HAO Yuan1
1 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050,China
2 Gansu Lanke Petrochemical High-tech Equipment Co., Ltd., Lanzhou 730070, China
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摘要 在气液两相流条件下,为研究CO2压力对20#钢初期腐蚀行为的影响,采用气液两相流的动态腐蚀平台,通过失重法、SEM、EDS、XRD等系统研究了20#钢在不同CO2压力下的腐蚀速率、腐蚀形貌及产物。结果表明:在不同腐蚀时间下,腐蚀速率均随CO2压力的增大呈先减小后增大的趋势,在CO2压力为0.1 MPa时出现最小值,同一CO2压力下腐蚀速率偏差随着时间的延长明显降低,表面腐蚀产物的致密度随着CO2压力的增加而提高,不同CO2压力下管壁表面腐蚀后的形貌呈现两种不同的特征,即粗糙区和相对平滑区,两种特征区内均包括相对均匀产物与突起产物,均匀产物中C和O的含量均低于突起产物,两种产物中C和O的含量随CO2压力的升高而升高,表面腐蚀产物的主要构成相为FeCO3、γ-FeOOH、Fe3O4。
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杨贵荣
宋文明
潘照霞
马颖
郝远
关键词:  气液两相泡状流  CO2压力  腐蚀产物特征  成分    
Abstract: The effect of CO2 pressure on the initial corrosion behavior of 20# seamless steel was studied on the dynamic corrosion platform of gas-liquid two-phase flow through weight-loss method, SEM, EDS and XRD. The corrosion rate, micro-structure and composition of corrosion products were studied systematically. Results showed that the corrosion rate decreased first and then increased with the increasing CO2 pressure under different corrosion time conditions. The corrosion rate reached minimum value when CO2 pressure was 0.1 MPa under experimental conditions. Under the same CO2 pressure, the corrosion rate deviation decreased obviously with the extension of time. The density of corrosion products increased with the increasing CO2 pressure. The corrosion morphology of pipe wall surface under different CO2 pressure conditions showed two kinds of different characteristics, namely rough area and smooth area. Both types of feature morphology area contain relatively homogeneous corrosion products and protruding corrosion products. The content of C and O in the homogeneous corrosion products was lower than that in the protruding corrosion products, and the content of C and O increased with the increasing CO2 pressure. The main phases of the corrosion products are FeCO3, γ-FeOOH and Fe3O4.
Key words:  gas-liquid two-phases bubble flow    CO2 pressure    characteristics of corrosion products    composition
发布日期:  2023-01-03
ZTFLH:  TG172.3  
基金资助: 国家自然科学基金(51765035);先进反应堆工程与安全教育部重点实验室开放基金(ARES-2022-2)
通讯作者:  yanggrming@lut.edu.cn   
作者简介:  杨贵荣,兰州理工大学材料科学与工程学院教授、博士研究生导师。2000年河北科技大学铸造专业本科毕业,2003年兰州理工大学材料加工专业硕士毕业后留校任教至今,2006年兰州理工大学材料加工工程专业博士毕业。目前主要从事表面耐磨耐蚀复合材料、石化用钢材的腐蚀行为机制及石化部件的失效分析等方面的研究工作。发表相关论文100余篇,包括Surface Coating & Technology、 Mate-rials Science and Engineering A、Wear、International Journal of Materials Research等,申请发明专利7项,获得授权两项。
引用本文:    
杨贵荣, 宋文明, 潘照霞, 马颖, 郝远. 气相压力对CO2/H2O气液两相泡状流中20#钢初期腐蚀行为的影响[J]. 材料导报, 2022, 36(24): 21110057-6.
YANG Guirong, SONG Wenming, PAN Zhaoxia, MA Ying, HAO Yuan. Effect of CO2 Pressure on Initial Corrosion Behavior of 20# Steel Under the Gas-Liquid (CO2/Aqueous Solution) Two-phases Bubble Flow. Materials Reports, 2022, 36(24): 21110057-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21110057  或          http://www.mater-rep.com/CN/Y2022/V36/I24/21110057
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