Oxidation of a chromia-forming nickel base alloy at high temperature in mixed diluted CO/H2O atmospheres

被引：25

作者：

Rouillard, F. ^{[1
]}

Cabet, C. ^{[1
]}

Wolski, K. ^{[2
]}

Pijolat, M. ^{[3
]}

机构：

[1] CEA, DEN, DPC, SCCME,Lab Etude Corros Non Aqueuse, F-91191 Gif Sur Yvette, France

[2] Ecole Natl Super Mines, MPI, CNRS, UMR5146,Ctr SMS, F-42023 St Etienne, France

[3] Ecole Natl Super Mines, CNRS, LMPG, UMR5148,Ctr SPIN, F-42023 St Etienne, France

来源：

CORROSION SCIENCE | 2009年 / 51卷 / 04期

关键词：

Superalloys; SIMS; High temperature Corrosion; Oxidation; Reactor conditions; GAS-COOLED REACTOR; PRIMARY CIRCUIT HELIUM; IMPURE HELIUM; OXIDE SCALES; CORROSION BEHAVIOR; ENVIRONMENTS; IMPURITIES; TRANSPORT; MECHANISM; MODEL;

D O I：

10.1016/j.corsci.2009.01.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion of a chromia-forming nickel base alloy, Haynes 230 (R), has been investigated under impure helium containing a few Pa of CO and H2O at 900 degrees C. It has been found that this alloy reacts simultaneously with CO and H2O. Oxidation by CO has been revealed to occur mainly in the first hours. CO diffuses through the scale via short-circuit pathways and oxidizes Al, Cr and Si at the oxide/metal interface. Kinetics of CO oxidation has been investigated and several rate limiting steps are proposed. In the long term, H2O is the major oxidant of chromia-forming nickel base alloys in impure helium. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：752 / 760

页数：9

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