Corrosion Resistance of Co-containing Maraging Stainless Steel

作     者：Jia-Long Tian Wei Wang M.Babar Shahzad Wei Yan Yi-Yin Shan Zhou-Hua Jiang Ke Yang 

作者机构：School of Materials Science and Engineering Northeastern University Institute of Metal Research Chinese Academy of Sciences School of Metallurgy Northeastern University 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2018年第31卷第8期

页      面：785-797页

核心收录：

学科分类：0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：sponsored by the Youth Innovation Promotion Association of Chinese Academy of Sciences (No. 2017233) the Innovation Project of Institute of Metal Research (No. 2015-ZD04) 

主　　题：Maraging stainless steel Corrosion resistance Passive film Atom probe tomography First-principles calculation 

摘      要：Corrosion resistance behavior of Co-containing maraging stainless steels was investigated. Neutral salt spray and polarization test showed that maraging stainless steel with high Co content showed poor corrosion behavior. Microstructure observation proved that segregation of Cr in the matrix deteriorated its corrosion resistance. The surface morphology of the aged maraging stainless steel with high Co content indicated that during passivation process, the newly formed passive film with sinusoidal distribution readily destroyed by the corrosive medium, hence, causing poor corrosion resistance. Moreover, through first-principles calculation it was proved that Co increased Fe–Fe ferromagnetic interaction which facilitated the formation Cr-rich clusters.