微观调控对13Cr15Ni4Mo3N高强不锈钢电化学行为钝化膜性能的影响  

Influence of Aging Treatment on Electrochemical Behavior and Property of Passive Film of 13Cr15Ni4Mo3N Stainless Steel

作　　者：梁剑雄[1] 王长军[1] 高韩蓉 刘振宝[1] 孙永庆[1] 杨志勇[1] 

机构地区：[1]钢铁研究总院特殊钢研究所,北京100081 [2]西安建筑科技大学冶金学院,西安710055

出　　处：《腐蚀科学与防护技术》2017年第4期401-406,共6页Corrosion Science and Protection Technology

基　　金：国家重点基础研究发展计划(2014CB643306)~~

摘　　要：采用极化曲线,电化学阻抗谱和Mott-Schottky曲线研究了不同时效温度下,13Cr15Ni4Mo3N高强不锈钢在3.5%NaCl溶液中形成的钝化膜性能。结果表明:相同时效时间下,随时效温度升高,于350~625℃温度区间,点蚀电位先降低后升高。电化学阻抗结果表明:随时效温度升高或时效时间延长,钝化膜的致密性先降低后升高。Mott-Schottky曲线计算表明:钝化膜缺陷扩散系数随时效温度升高先增加后减小,表面钝化膜的稳定性随时效温度先降低后升高,与极化曲线、电化学阻抗谱测试结果一致。Effect of aging treatment on electrochemical behavior of 13Cr15Ni4Mo3N stainless steel was examined by means of potentiodynamic polarization technique, dynamic electrochemical impedance spectrum（DEIS） and Mott-Schottky analysis. The result showed that pitting potential changed with aging temperature decrease firstly then increase. DEIS results displayed that compactness of passive films decreases firstly then increases with the increasing aging temperature and aging time. The result of theoretical calculation implied that aging temperature exhibited impact on the defect density and diffusion coefficient of the passive films.

关 键 词：13Cr15Ni4Mo3N高强不锈钢 时效制度 半导体特性 Mott-Schottky分析 电化学阻抗谱 

分 类 号：TG174.3[金属学及工艺—金属表面处理]