Corrosion of 9Cr Steel in CO2 at Intermediate Temperature II: Mechanism of Carburization

被引：99

作者：

Rouillard, F. ^{[1
]}

Moine, G. ^{[1
]}

Tabarant, M. ^{[2
]}

Ruiz, J. C. ^{[3
]}

机构：

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

[2] CEA, DEN, DPC, SCP,Lab Reactivite Surfaces & Interfaces, F-91191 Gif Sur Yvette, France

[3] CEA, DEN, DTCD, SPDE,Lab Fluides Supercrit & Membranes, F-30207 Bagnols Sur Ceze, France

来源：

OXIDATION OF METALS | 2012年 / 77卷 / 1-2期

关键词：

Carbon dioxide; Ferritic steel; Oxidation; Carburization; Voids; High pressure; OXIDATION; ALLOY;

D O I：

10.1007/s11085-011-9272-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In parallel to the formation of a duplex oxide scale, 9Cr-1Mo steel carburizes strongly under CO2 at 550 degrees C and this carburization accelerates with time. It is observed that an increase of the total CO2 pressure in the environment from 1 to 250 bars induces a higher carbon deposition in the inner Fe-Cr rich spinel oxide layer. In order to explain this phenomenon, modelling of the carburization process was carried out. A mechanism involving gas diffusion of CO2 and CO through the oxide layer, the Boudouard reaction and carbon diffusion through the metallic substrate is proposed.

引用

页码：57 / 70

页数：14

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