316LN不锈钢在除氧高温水中表面氧化膜的多层结构  

Multi-Layered Structure of the Oxide Film Formed on 316LN Stainless Steel in Deoxygenated High Temperature Water

作　　者：杨双亮 李国健 许鑫和 崔同明 潘登 吕战鹏[2] YANG Shuangliang;LI Guojian;XU Xinhe;CUI Tongming;PAN Deng;LYU Zhanpeng(State Nuclear Power Service Company,Shanghai 200333,China;Institute of Materials,School of Materials Science and Engineering,Shanghai University,Shanghai,200072,China)

机构地区：[1]国核电站运行服务技术有限公司,上海200233 [2]上海大学材料科学与工程学院材料研究所,上海200072

出　　处：《腐蚀与防护》2024年第10期52-56,共5页Corrosion & Protection

基　　金：国家重大专项(2019ZX06005002);国家自然科学基金(51771107)。

摘　　要：在钛合金高压釜中对316LN不锈钢进行了除氧高温水中浸泡试验。采用X射线衍射、扫描电镜观察和透射电镜测试浸泡试验后316LN不锈钢表面生成氧化膜的特征。结果表明:外层氧化物中富铁、含镍且铬含量很低;内层氧化膜中富铬含铁和镍,表现为两个细分区域。靠近金属基体的过渡区中主合金元素和氧的浓度梯度大;而在该过渡区与外层氧化膜之间的准均匀区,元素浓度梯度较小,表现为铬含量逐渐增大,镍和铁含量逐渐减小。在内层氧化膜与外层氧化膜之间出现主要合金元素及氧含量的陡变。The immersion test of 316LN stainless steel in deoxygenated high temperature water was conducted in a titanium alloy high-pressure reactor,and the characteristics of the oxide film formed on the surface of 316LN stainless steel after immersion test were observed by X-ray diffraction,scanning electron microscopy,and transmission electron microscopy testing.The results show that the outer oxide layer was rich in iron,contained nickel,and had low chromium.The inner oxide film was rich in chromium,iron,and nickel,manifested as two segmented regions.The concentration gradient of the main alloying elements and oxygen was large in the transition zone near the metal matrix.In the quasi uniform region between the transition zone and the outer oxide film,the concentration gradient of elements was relatively small,manifested as a gradual increase in chromium content and a gradual decreased in nickel and iron content.There was a steep change in the main alloying elements and oxygen content between the inner oxide film and the outer oxide film.

关 键 词：压水堆 不锈钢 高温水 氧化膜 腐蚀 透射电镜 

分 类 号：TG174.4[金属学及工艺—金属表面处理]