The mechanisms underlying the effect of tempering time on the pitting behavior of high-nitrogen martensitic stainless steel

doi:10.1016/j.corsci.2025.112748

IMR OpenIR

	The mechanisms underlying the effect of tempering time on the pitting behavior of high-nitrogen martensitic stainless steel
	Wang, Siyan 1,3; Du, Hongyao 1; Shi, Zhiyue 1,2,4; Zhang, Litao 2; Liu, Canshuai 5,6; Yan, Zhijie 1; Wang, Jianqiu 3; Wang, Cunyu 4; Cao, Wenquan 4; Liang, Minjie 1
通讯作者	Wang, Jianqiu(wangjianqiu@imr.ac.cn) ; Liang, Minjie(18835138493@163.com)
	2025-04-15
发表期刊	CORROSION SCIENCE
ISSN	0010-938X
卷号	246 页码:17
摘要	High-nitrogen martensitic stainless steel (HNMSS) is widely used in chemical, marine, and medical applications due to its excellent mechanical properties and corrosion resistance. However, pitting corrosion remains a major issue, particularly in chloride-containing environments. The tempering process after quenching affects both the mechanical properties and microstructure of HNMSS, but its influence on pitting behavior is not well understood. This study investigates the effect of tempering duration on the pitting corrosion of HNMSS in 3.5 wt% NaCl solution. The HNMSS was solution-treated at 1030 degrees C for 30 min, followed by oil quenching and cryogenic treatment, and then tempered at 500 degrees C for 1-100 h. Microstructure characterization was performed using XRD, SEM, and TEM. Potentiodynamic polarization and EIS were used to assess pitting behavior, while in-situ electrochemical techniques and SEM were employed to observe corrosion morphology. The results showed that after solution treatment, HNMSS contained significant undissolved primary Cr2N, with no chromium carbides. Secondary Cr2N appeared only after 100 h of tempering. Pitting sensitivity increased with longer tempering times, with the pitting potential decreasing from 0.348 V (cryogenic treatment) to 0.124 V after 2 h of tempering. Beyond 5 h, pitting occurred without anodic polarization, resulting in loss of passivation. This behavior is related to the decrease in chromium content in the matrix surrounding the primary Cr2N, which drops to 7.47 at% after 100 h of tempering. The primary Cr2N had a more significant impact on pitting sensitivity than the secondary Cr2N.
关键词	HNMSS Pitting Corrosion behavior Tempering Cr2N
资助者	Opening Foundation of Shanxi Key Laboratory of Advanced Metal Materials for Special Environments ; Natural Science Foundation of Shanxi Province ; Taiyuan Alloy Technology Key Project
DOI	10.1016/j.corsci.2025.112748
收录类别	SCI
语种	英语
资助项目	Opening Foundation of Shanxi Key Laboratory of Advanced Metal Materials for Special Environments[AMMSE-2023-008] ; Natural Science Foundation of Shanxi Province[202103021224219] ; Taiyuan Alloy Technology Key Project[2024TYJB0123]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001420550700001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179891
专题	中国科学院金属研究所
通讯作者	Wang, Jianqiu; Liang, Minjie
作者单位	1.North Univ China, Shanxi Key Lab Adv Met Mat Special Environm, Taiyuan 030051, Peoples R China 2.Shanxi Taigang Stainless Steel Co Ltd, Technol Ctr, Taiyuan 030003, Peoples R China 3.Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China 4.Cent Iron & Steel Res Inst Co Ltd, Res Inst Special Steel, Beijing 100081, Peoples R China 5.Suzhou Nucl Power Res Inst Co Ltd, Suzhou 215004, Jiangsu, Peoples R China 6.Natl Engn Res Ctr Nucl Power Plant Safety & Reliab, Suzhou 215004, Peoples R China
推荐引用方式 GB/T 7714	Wang, Siyan,Du, Hongyao,Shi, Zhiyue,et al. The mechanisms underlying the effect of tempering time on the pitting behavior of high-nitrogen martensitic stainless steel[J]. CORROSION SCIENCE,2025,246:17.
APA	Wang, Siyan.,Du, Hongyao.,Shi, Zhiyue.,Zhang, Litao.,Liu, Canshuai.,...&Liang, Minjie.(2025).The mechanisms underlying the effect of tempering time on the pitting behavior of high-nitrogen martensitic stainless steel.CORROSION SCIENCE,246,17.
MLA	Wang, Siyan,et al."The mechanisms underlying the effect of tempering time on the pitting behavior of high-nitrogen martensitic stainless steel".CORROSION SCIENCE 246(2025):17.