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A finite element model for the dissolution of corrosion pits in the presence of fluid flow
Author(s) -
Harb John N.,
Alkire Richard C.
Publication year - 1988
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650081204
Subject(s) - dissolution , corrosion , fluid dynamics , pitting corrosion , finite element method , mechanics , diffusion , materials science , flow (mathematics) , nickel , volumetric flow rate , metallurgy , chloride , convection , thermodynamics , engineering , chemical engineering , physics
Simulation of the dissolution of an active corrosion pit in the presence of fluid flow was carried out with the use of finite element techniques. The model included multiple species in solution, reaction equilibria and transport by diffusion, convection and migration. The mathematical model was used to examine the effect of fluid flow on the pitting of nickel in neutral chloride solution. The pit dissolution rate was found to decrease with increasing flow owing to potential field effects. The capabilities demonstrated in this paper represent a significant advancement in the modelling of pitting corrosion phenomena.