کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
190726 459706 2010 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Corrosion modelling of iron based alloy in nuclear waste repository
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Corrosion modelling of iron based alloy in nuclear waste repository
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 55, Issue 15, 1 June 2010, Pages 4451–4467
نویسندگان
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