引用本文:姚莹,杨柏俊,张锁德,邱克强.铁基非晶合金和13Cr不锈钢在超临界CO2环境的腐蚀行为[J].中国表面工程,2023,36(1):85~94
YAO Ying,YANG Baijun,ZHANG Suode,QIU Keqiang.Corrosion Behavior of Fe-based Amorphous Alloys and 13Cr Stainless Steels under Supercritical CO2 Environment[J].China Surface Engineering,2023,36(1):85~94
【打印本页】   【HTML】   【下载PDF全文】   【查看/发表评论】  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被：浏览 832次   下载 370次 本文二维码信息
码上扫一扫！
分享到： 微信 更多
字体:加大+|默认|缩小-
铁基非晶合金和13Cr不锈钢在超临界CO2环境的腐蚀行为
姚莹1,2, 杨柏俊2, 张锁德2, 邱克强1
1.沈阳工业大学材料科学与工程学院 沈阳 110870;2.中国科学院金属研究所沈阳材料科学国家研究中心 沈阳 110016
摘要:
非晶合金由于其独特的结构、优异的耐磨耐蚀性能在海洋及 CO2地质封存领域展现出广阔的应用前景，有望成为超临界 CO2 环境下钢构件的耐蚀涂层材料，但关于非晶合金在该环境下的腐蚀行为鲜有报道。利用高温高压反应釜对 SAM2X5 铁基非晶合金与 13Cr 马氏体不锈钢在温度 80 ℃，压力 10 MPa的模拟环境下进行腐蚀行为对比研究。通过 XRD、DSC、CLSM、 SEM、XPS 以及电化学 Mott-Schottky 测试等方法对两种材料的微观结构、腐蚀形貌以及表面膜成分及结构进行表征与分析。 研究结果表明：在高温高压的超临界 CO2 环境下进行 168 h 腐蚀试验后，13Cr 不锈钢表面发生严重的点蚀，而铁基非晶合金表面无点蚀发生；非晶合金表面膜除 Fe 和 Cr 外，富含大量的 Si 元素，会促进形成稳定致密的钝化膜；13Cr 不锈钢表面膜为 p 型半导体，非晶合金表面膜为 n 型半导体，13Cr 不锈钢钝化膜载流子密度远高于铁基非晶合金。证实了在该环境下铁基非晶合金的耐蚀性能远优于 13Cr 不锈钢。
关键词:  铁基非晶合金  腐蚀行为  超临界 CO2  XPS
DOI：10.11933/j.issn.1007?9289.20220405002
分类号:TG172
基金项目:国家自然科学基金(51701214，U1908219)和中国科学院重点部署(ZDRW-CN-2021-2-2)资助项目
Corrosion Behavior of Fe-based Amorphous Alloys and 13Cr Stainless Steels under Supercritical CO2 Environment
YAO Ying1,2, YANG Baijun2, ZHANG Suode2, QIU Keqiang1
1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870 , China;2.Shenyang National Laboratory for Materials Science, Institute of Metal Research ofChinese Academy of Sciences, Shenyang 110016 , China
Abstract:
To cope with global warming, the rapid development of carbon capture, utilization and storage (CCUS) technology has generated unique challenges for steel structure corrosion resistance in supercritical CO2 environments. The CO2 storage in deep seawater geological reservoirs is typically in a supercritical state (larger than 7.38 MPa, 31.1 ℃), and the fluid is commonly characterized by high chloride contents. This chloride-containing supercritical CO2 condition generally leads to serious corrosion damage on structural steel components. Many steel materials suffer from severe grain boundary corrosion owing to their crystalline structure, and structural steel corrosion problems in this environment is considered a significant obstacle for the development of CO2 capture and storage. Amorphous alloy possesses unique atomic structures with long-range disorder and many outstanding properties such as high strength and hardness, good thermal stability, excellent corrosion and wear resistance. Amorphous alloy is therefore considered an ideal candidate as coating material for structural steel protection in CCUS areas. However, few studies on amorphous alloy corrosion behavior in this environment have been published. In this study, the corrosion behavior of a SAM2X5 Fe-based amorphous alloy and 13Cr martensitic stainless steel is comparatively studied in a high temperature, high pressure reactor under a simulated supercritical CO2 environment of approximately 80 ℃ and 10 MPa. X-ray diffraction (XRD), differential scanning calorimetry (DSC), confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and electrochemical Mott-Schottky tests were conducted to characterize and analyze the microstructure, corrosion morphology, and surface film components for the two alloy samples. Corrosion test results demonstrate that after a 168 h corrosion experiment in the supercritical CO2 environment, serious pitting corrosion occurs on the surface of 13Cr stainless steel, while no obvious corrosion was observed on the Fe-based amorphous alloy surface, which exhibited excellent corrosion resistance of the amorphous alloy in high temperature, high pressure corrosive environments. The surface analysis results demonstrate that the surface film formed on amorphous alloy is rich in the Si element in addition to Fe and Cr, which promotes the formation of a stable dense passive film. Mott-Schottky tests indicate that the surface film for 13Cr stainless steel exhibits p-type semiconductor characteristics, while the surface film for Fe-based amorphous alloy exhibits n-type semiconductor characteristics. In addition, the carrier density in the passive film of 13Cr stainless steel is significantly higher than that of the Fe-based amorphous alloy. Based on these results, it can be concluded that Fe-based amorphous alloy corrosion resistance in a chloride-containing supercritical CO2 environment is significantly more superior to that of 13Cr stainless steel. Finally, this demonstrates a promising material worth considering for application in extremely corrosive environments.
Key words:  Fe-based amorphous alloys  corrosion behavior  supercritical CO2 environments  XPS
手机扫一扫看