High temperature oxidation behavior of ferritic steel in supercritical water at 550-700°C

被引：6

作者：

Li, Hongyuan ^{[1
]}

Cao, Qiong ^{[2
]}

Zhu, Zhongliang ^{[3
]}

机构：

[1] North China Elect Power Univ, Sch Control & Comp Engn, Beijing, Peoples R China

[2] North China Elect Power Univ, Sch Nucl Sci & Engn, Beijing, Peoples R China

[3] North China Elect Power Univ, Minist Educ, Key Lab Condit Monitoring & Control Power Plant, Beijing, Peoples R China

来源：

MATERIALS AT HIGH TEMPERATURES | 2019年 / 36卷 / 02期

关键词：

Ferritic steel; oxidation; supercritical water; temperature; SEM; XRD; Activation energy; diffusion; MARTENSITIC STEEL; OXIDE SCALES; ALLOYS; STEAM;

D O I：

10.1080/09603409.2018.1468524

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxidation tests were conducted on ferritic steel T22 exposed to deaerated supercritical water at 550-700 degrees C and 25 MPa. Oxide films formed on T22 had a double-layered structure with the outer layer consisting of iron oxide and the inner layer consisting of spinel oxide. Pores formed on the surface of samples initially but healed at longer exposure time and higher temperature. Cracks occurred along the grain boundaries in the oxide scale at 600-700 degrees C for 200 and 400 h. The oxidation kinetics obeyed a near-parabolic law in all cases. The data of activation energy of T22 indicated that the likely oxidation rate-controlling step may be the outward diffusion of iron along the magnetite bulk.

引用

页码：111 / 116

页数：6

共 22 条

[1] Oxidation of ferritic-martensitic alloys T91, HCM12A and HT-9 in supercritical water [J].

Ampornrat, Pantip ;

Was, Gary S. .

JOURNAL OF NUCLEAR MATERIALS, 2007, 371 (1-3) :1-17

[2]

Angell M.G., 2008, 15 INT C PROP WAT ST, P1

[3]

Armitt J., 1978, SPALLING STEAM GROWN

[4] Corrosion of ferritic-martensitic steels in steam and supercritical water [J].

Bischoff, Jeremy ;

Motta, Arthur T. ;

Eichfeld, Chad ;

Comstock, Robert J. ;

Cao, Guoping ;

Allen, Todd R. .

JOURNAL OF NUCLEAR MATERIALS, 2013, 441 (1-3) :604-611

[5] BEHAVIOR OF OXIDE SCALES ON 2.25CR-1MO STEEL DURING THERMAL CYCLING .2. SCALES GROWN IN WATER-VAPOR [J].

CHRISTL, W ;

RAHMEL, A ;

SCHUTZE, M .

OXIDATION OF METALS, 1989, 31 (1-2) :35-69

[6]

Dooley B, 1995, ULTRAPURE WATER, V12, P48

[7]

DOOLEY B, 1992, P 16 INT WAT C, V53

[8]

Mongomery M., 1995, VGB KRAFTWERKSTECHNI, V75, P235

[9] Boiler materials for ultra-supercritical coal power plants-stearnside oxidation [J].

Viswanathan, R. ;

Sarver, J. ;

Tanzosh, J. M. .

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2006, 15 (03) :255-274

[10]

Was GS., 2005, P ICAPP SEOUL, V5, P15

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