Fe13Cr5Al4Mo 合金在 360 ℃/18.6 MPa LiOH水溶液中的腐蚀行为
Corrosion Behavior of Fe13Cr5A14Mo Alloy in LiOH Aqueous Solution at 360 ℃/18.6 MPa
马海滨 1王皓瑜 2张文怀 2林晓冬 2薛佳祥 1任啟森 1廖业宏 1胡丽娟 2孙蓉蓉 2梁雪 3李毅丰 3姚美意2
作者信息
- 1. 中广核研究院有限公司,广东深圳 518026
- 2. 上海大学材料研究所,上海 200072
- 3. 上海大学微结构重点实验室,上海 200444
- 折叠
摘要
采用静态高压釜研究了 Fe13Cr5Al4Mo合金在360 ℃/18.6 MPa/70 μg/mL LiOH水溶液中的腐蚀行为,以评估其在高温高压水环境中的耐腐蚀性能.采用SEM、TEM、EDS等研究了 Fe13Cr5Al4Mo合金腐蚀后的氧化膜显微组织及其演化行为.结果表明,Fe13Cr5Al4Mo合金在LiOH水溶液中表现为腐蚀失重,这与LiOH影响了 Fe的氧化物溶解-再沉积过程有关.Fe13Cr5Al4Mo合金在LiOH水溶液中长期腐蚀形成的氧化膜主要由Fe(Cr,Al)2O4组成,靠近外表面存在少量Fe3O4.这层Fe(Cr,Al)2O4膜可以阻碍金属阳离子和氧离子在氧化膜内的扩散,进而延缓Fe13Cr5Al4Mo合金的进一步腐蚀.
Abstract
The corrosion behavior of Fe13Cr5A14Mo alloy in 70 μg/mL LiOH aqueous solution at 360 ℃/18.6 MPa was studied using a static autoclave to assess its corrosion resistance.The microstructure of the oxide film on the Fe13Cr5A14Mo alloy after corrosion was investigated by SEM,TEM and EDS.The results show that the Fe13Cr5A14Mo alloy exhibits corrosion mass loss in LiOH aqueous solution,which is related to the dissolution-redeposition process of Fe oxide affected by LiOH.The oxide film formed on the alloy during the long-term corrosion in LiOH aqueous solution is mainly composed of Fe(Cr,Al)2O4,and a small amount of Fe3O4 exists near the outer surface.The Fe(Cr,Al)2O4 layer can hinder the diffusion of metal ions and oxygen ions within the oxide film,which in turn retards further corrosion of the alloy.
关键词
ATF包壳材料/FeCrAl合金/腐蚀/氧化膜/显微组织Key words
ATF cladding materials/FeCrAl alloy/corrosion/oxide film/microstructure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据