Corrosion and oxidation modelling

The diffusion data, in Fig. 29.4, have been defined using common statements in the development of the modelling tools. The adapted statements are as follows. 

Thermodynamics give what will be formed possibility and order of phases. 

Typically, diffusion coefficients are determined using the diffusion couple method giving (volume diffusion in parabolic growth) and diffusivities 

In this project, the definition of effective diffusion coefficient, from the Wagner solution is adapted and bulk oxygen diffusivity data are taken from the open literature and experimental test results available. The grain boundary diffusivity values are approximated to yield 100 times the bulk values. 

1 ChemSheet-based modelling tool for high temperature corrosion 

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