Fe13Cr5Al4Mo合金在360℃/18.6 MPa LiOH水溶液中的腐蚀行为  

Corrosion Behavior of Fe13Cr5Al4Mo Alloy in LiOH Aqueous Solution at 360 ℃/18.6 MPa

作　　者：马海滨 王皓瑜 张文怀 林晓冬 薛佳祥 任啟森 廖业宏 胡丽娟[2] 孙蓉蓉 梁雪[3] 李毅丰 姚美意[2] Ma Haibin;Wang Haoyu;Zhang Wenhuai;Lin Xiaodong;Xue Jiaxiang;Ren Qisen;Liao Yehong;Hu Lijuan;Sun Rongrong;Liang Xue;Li Yifeng;Yao Meiyi(China Nuclear Power Technology Research Institute Co.,Ltd,Shenzhen 518026,China;Institute of Materials,Shanghai University,Shanghai 200072,China;Laboratory for Microstructures,Shanghai University,Shanghai 200444,China)

机构地区：[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

出　　处：《稀有金属材料与工程》2024年第7期2018-2024,共7页Rare Metal Materials and Engineering

摘　　要：采用静态高压釜研究了Fe13Cr5Al4Mo合金在360℃/18.6 MPa/70μg/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)_(2)O_(4)组成,靠近外表面存在少量Fe_(3)O_(4)。这层Fe(Cr,Al)_(2)O_(4)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。The corrosion behavior of Fe13Cr5Al4Mo alloy in 70μg/m L 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 Fe13Cr5Al4Mo alloy after corrosion was investigated by SEM,TEM and EDS.The results show that the Fe13Cr5Al4Mo 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)_(2)O_(4),and a small amount of Fe_(3)O_(4) exists near the outer surface.The Fe(Cr,Al)_(2)O_(4) 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 

分 类 号：TL341[核科学技术—核技术及应用] TG146.414[一般工业技术—材料科学与工程]