Assessment of the correlation between M23C6 precipitates and pitting corrosion resistance of 0Cr13 martensitic stainless steel

被引：84
作者：
Zhao, Yonggang [1 ]
Liu, Wei [1 ]
Zhang, Tianyi [1 ]
Sun, Zongteng [1 ]
Wang, Yabin [1 ]
Fan, Yueming [1 ]
Dong, Baojun [1 ]
机构：
[1] Univ Sci & Technol Beijing, Corros & Protect Ctr, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 189卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Martensitic stainless steel; Heat treatment; M23C6; precipitates; Cr-depleted regions; Pitting behavior; INTERGRANULAR CORROSION; HEAT-TREATMENT; REVERSED AUSTENITE; 3CR STEEL; MICROSTRUCTURE; BEHAVIOR; TEMPERATURE; SUSCEPTIBILITY; MECHANISM; CO2;
D O I：
10.1016/j.corsci.2021.109580
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of M23C6 precipitates on the pitting behavior of 0Cr13 martensitic stainless steel (MSS) was investigated. The results revealed that the precipitates in the 0Cr13 MSS with different tempering temperatures were all M23C6 with a face-centered cubic (FCC) structure. The Cr-depleted regions had approximately 6 mV Volta potential lower than the steel matrix. The increasing Cr contents in the Cr-depleted regions hampered the effect of Cr deficiency in the weak passive film. The low width and density of Cr-depleted regions reduced the intensity of pits on steel surface. The pitting corrosion resistance was enhanced as the tempering temperature increased.
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页数：14
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