%0 Journal Article
%T Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures
%A Trindade
%A Vicente Braz
%A Christ
%A Hans-Jščrgen
%A Krupp
%A Ulrich
%J Rem: Revista Escola de Minas
%D 2009
%I Escola de Minas
%R 10.1590/S0370-44672009000200009
%X a reasonable prediction of the service life of structures or equipment operating at high-temperatures in aggressive atmospheres requires a full understanding of the degradation mechanisms of the material due to mechanical loading and corrosion. the overall objective of this study is to simulate high-temperature corrosion processes under near-service conditions, which require both, a thermodynamic model to predict phase stabilities for given conditions and a mathematical description of the kinetic process, i.e., solid state diffusion. a computer program was developed in which the thermodynamic program library chemapp is integrated into a numerical finite-difference diffusion calculation to treat internal oxidation, nitridation and sulfidization processes in various commercial alloys. the model is capable of simulating multi-phase internal corrosion processes controlled by solid-state diffusion into the bulk metal as well as intergranular corrosion occurring in low-alloy steels by fast inward oxygen transport along the grain boundaries of the substrate. in this article, dilute and monophase solutions are considered.
%K internal nitridation
%K oxidation
%K computational thermodynamics
%K chemapp
%K incorr
%K finite difference.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0370-44672009000200009&lng=en&nrm=iso&tlng=en