Corrosion modelling of iron based alloy in nuclear waste repository

被引：59
作者：
Bataillon, C. [1 ]
Bouchon, F. [2 ,3 ]
Chainais-Hillairet, C. [2 ,3 ]
Desgranges, C. [1 ]
Hoarau, E. [5 ]
Martin, F. [1 ]
Perrin, S. [1 ]
Tupin, M. [4 ]
Talandier, J. [5 ]
机构：
[1] CEA, DEN, DPC, SCCME, F-91191 Gif Sur Yvette, France
[2] Univ Blaise Pascal, Clermont Univ, Math Lab, F-63000 Clermont Ferrand, France
[3] CNRS, Math Lab, UMR 6620, F-63177 Aubiere, France
[4] CEA, DEN, DMN, SEMI,LM2E, F-91191 Gif Sur Yvette, France
[5] ANDRA DS, F-92298 Chatenay Malabry, France
来源：
ELECTROCHIMICA ACTA | 2010年 / 55卷 / 15期
关键词：
PDM; Poisson; Oxide layer; Iron; Mott-Schottky; POINT-DEFECT MODEL; TEMPERATURE AQUEOUS-ELECTROLYTES; CONTACT ELECTRIC IMPEDANCE; MIXED-CONDUCTION MODEL; ANODIC PASSIVE FILMS; FE-CR ALLOYS; CATION DIFFUSION; ETHYLENEDIAMINETETRAACETIC ACID; OXIDE-FILMS; KINETICS;
D O I：
10.1016/j.electacta.2010.02.087
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The Diffusion Poisson Coupled Model (DPCM) is presented to modelling the oxidation of a metal covered by an oxide layer. This model is similar to the Point Defect Model and the Mixed Conduction Model except for the potential profile which is not assumed but calculated in solving the Poisson equation. This modelling considers the motions of two moving interfaces linked through the ratio of Pilling-Bedworth Their locations are unknowns of the model Application to the case of iron in neutral or slightly basic solution is discussed Then, DPCM has been first tested in a simplified situation where the locations of interfaces were fixed In such a situation, DPCM is in agreement with Mott-Schottky model when iron concentration profile is homogeneous When it is not homogeneous, deviation from Mott-Schottky model has been observed and is discussed. The influence of the outer and inner interfacial structures on the kinetics of electrochemical reactions is illustrated and discussed Finally, simulations for the oxide layer growth are presented. The expected trends have been obtained. The steady-state thickness is a linear function of the applied potential and the steady-state current density is potential independent (C) 2010 Elsevier Ltd. All rights reserved
引用
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页码：4451 / 4467
页数：17
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