Corrosion Behaviors of Fe-22Cr-16Mn-0.55N High-Nitrogen Austenitic Stainless Steel in 3.5% NaCl Solution

被引：6
|
作者：
Xu, Song [1 ]
Gao, Fengyin [2 ]
Han, Jianyang [2 ]
Xiong, Shangfeng [1 ]
Duan, Xinyu [1 ]
Zha, Fanglin [1 ]
Yu, Bing [1 ]
Yang, Lanlan [2 ]
Qiao, Yanxin [2 ]
Zheng, Zhibin [3 ]
Chen, Jian [4 ]
机构：
[1] State Grid Hunan Elect Power Co Ltd, Elect Power Res Inst, Changsha 410007, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Peoples R China
[3] Guangdong Acad Sci, Inst New Mat, Natl Engn Res Ctr Powder Met Titanium & Rare Met, Guangdong Prov Key Lab Met Toughening Technol & Ap, Guangzhou 510650, Peoples R China
[4] Western Univ, Dept Chem, London, ON N6A 5B7, Canada
来源：
COATINGS | 2022年 / 12卷 / 11期
关键词：
high nitrogen austenitic stainless steel; solution treatment; corrosion; passive film; ELECTROCHEMICAL CORROSION; MICROSTRUCTURAL EVOLUTION; LONG-TERM; RESISTANCE; NIOBIUM;
D O I：
10.3390/coatings12111769
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the corrosion behavior of the high-nitrogen austenitic stainless steel (HNS) Fe-22Cr-16Mn-0.55N before and after solution treatment (ST) in 3.5% NaCl solution has been investigated. The effect of a solution temperature of 1100 degrees C and heat preservation for 30 min on the corrosion resistance and passive film protection of HNS steel was studied. Open-circuit potential, potentiodynamic polarization and electrochemical impedance tests were used to assess the corrosion resistance of treated and untreated steels. In addition, potentiostatic polarization and XPS techniques together with Mott-Schottky curves were applied to determine the composition and properties of the passive films. The results showed that after solution treatment, the grain size of HNS decreased and the grain became more uniform. Although corrosion occurred on HNSs both before and after treatment, solution treatment resulted in greater compactness in passive films, leading to lower carrier density, lower corrosion current density and better corrosion resistance.
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页数：13
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