Effect of aging treatment on microstructure and corrosion behavior of a Fe-18Cr-15Mn-0.66N stainless steel

作     者：Yanxin Qiao Xinyi Wang Lanlan Yang Xiaojing Wang Jian Chen Zhengbin Wang Huiling Zhou Jiasheng Zou Fuhui Wang Yanxin Qiao;Xinyi Wang;Lanlan Yang;Xiaojing Wang;Jian Chen;Zhengbin Wang;Huiling Zhou;Jiasheng Zou;Fuhui Wang

作者机构：School of Materials Science and EngineeringJiangsu University of Science and TechnologyZhenjiang 212003China CAS Key Laboratory of Nuclear Materials and Safety AssessmentInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Laboratory for Corrosion and ProtectionInstitute of Metal ResearchChinese Academy of ScienceShenyang 110016China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第107卷第12期

页      面：197-206页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 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] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 52001142, 52005228, 51801218, 51911530211, and 51905110) Science Foundation of Jiangsu Province (No. BK 20180984)。 

主　　题：High-nitrogen stainless steel Corrosion Aging treatment Passive film 

摘      要：The effect of aging treatment on the microstructure and corrosion behavior of a Fe-18Cr-15Mn-0.66N high-nitrogen stainless steel(HNSS) in 3.5 wt.% Na Cl solution was investigated using a series of electrochemical tests, scanning electronic microscopy(SEM), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The results showed that the aging treatment led to the precipitation of CrN particles along the grain boundaries and their morphologies changed from dispersive particles to continuous network as the aging time increased up to 60 min. Aging time had minor effects on the corrosion potential and corrosion current density, but resulted in the sharp decrease in the pitting corrosion potential.The passive film behaved as a n-type semiconductor, and the donor density of the passive film increased with the aging time. Meanwhile, the fraction of stable oxide(CrO) in the passive film decreased with the aging time. It demonstrates that the aging treatment deteriorated the protectiveness of the passive film, hence weakened the corrosion resistance of HNSS.