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Corrosion behavior and electrochemical properties of heat-treated Fe-20Cr-18Ni-6Mo-0.8Cu-0.2N-La alloys in alkaline seawater

文献类型：期刊论文

作者Li, Haojun2,3,4,5; Jiang, Quantong2,3,4,5; Liu, Xingbin2,3,4,5; Lu, Dongzhu2,3,4,5; Zhai, Xiaofan2,3,4,5; Wang, Jin4; Li, Chen1; Duan, Jizhou2,3,4,5; Hou, Baorong2,3,4,5
刊名NPJ MATERIALS DEGRADATION
出版日期2025-11-13
卷号9期号:1页码:19
DOI10.1038/s41529-025-00682-8
通讯作者Jiang, Quantong(jiangquantong@qdio.ac.cn) ; Wang, Jin(wangjin@sdas.org)
英文摘要This study examines the microstructure, corrosion resistance, and electrochemical behavior of Fe-20Cr-18Ni-6Mo-0.8Cu-0.2N-La alloys after heat treatment at different temperatures. The results show that heating the alloy to 1200 degrees C for 1 h leads to the dissolution of second-phase particles, and the undissolved precipitation is Mo-rich phase sigma-FeCrMo. Loss-in-weight analysis indicates that corrosion resistance is better at 75 degrees C than at 50 degrees C, with the 0.5 wt% alloy showing the lowest corrosion rate (75 degrees C: 0.0116 mm/a). Electrochemical tests indicate the 0.5 wt% La alloy shows the lowest corrosion current densities of 5.272 x 10-7 A/cm2 at 50 degrees C and 1.183 x 10-6 A/cm2 at 75 degrees C, demonstrating superior corrosion resistance as a cathode. Surface roughness analysis shows that the surface roughness is decreased after alkaline seawater (ASW) corrosion at 75 degrees C. This study highlights the potential of austenitic stainless steels as cathode materials for hydrogen (H2) production from seawater electrolysis (SWE).
WOS关键词PITTING CORROSION ; HYDROGEN ; ELECTROLYSIS
资助项目Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City[2021CXLH0005] ; National Key R&D Program of China[2024YFB4207004] ; Qingdao Key Technology Research and Development Project[24-1-6-ghgg-2-hz] ; Wenhai Program of the S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology[2021WHZZB2301]
WOS研究方向Materials Science
语种英语
WOS记录号WOS:001613822900001
出版者NATURE PORTFOLIO
源URL[http://ir.qdio.ac.cn/handle/337002/203776]  
专题中国科学院海洋研究所
通讯作者Jiang, Quantong; Wang, Jin
作者单位1.Chinese Acad Sci, Inst Oceanol, Publ Technol Ctr, Qingdao, Peoples R China
2.Sanya Inst Ocean Ecoenvironm Engn, Sanya, Peoples R China
3.Laoshan Lab Marine Corros & Protect Open Studio, Qingdao, Peoples R China
4.Qilu Univ Technol, Sch Mat Sci & Engn, Jinan, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, State Key Lab Adv Marine Mat, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Li, Haojun,Jiang, Quantong,Liu, Xingbin,et al. Corrosion behavior and electrochemical properties of heat-treated Fe-20Cr-18Ni-6Mo-0.8Cu-0.2N-La alloys in alkaline seawater[J]. NPJ MATERIALS DEGRADATION,2025,9(1):19.
APA Li, Haojun.,Jiang, Quantong.,Liu, Xingbin.,Lu, Dongzhu.,Zhai, Xiaofan.,...&Hou, Baorong.(2025).Corrosion behavior and electrochemical properties of heat-treated Fe-20Cr-18Ni-6Mo-0.8Cu-0.2N-La alloys in alkaline seawater.NPJ MATERIALS DEGRADATION,9(1),19.
MLA Li, Haojun,et al."Corrosion behavior and electrochemical properties of heat-treated Fe-20Cr-18Ni-6Mo-0.8Cu-0.2N-La alloys in alkaline seawater".NPJ MATERIALS DEGRADATION 9.1(2025):19.

入库方式： OAI收割

来源：海洋研究所

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